Enantioselective conjugate additions of silylketene acetals to 2-carboxycyclopentenones promoted by chiral Ti complexes

Tetrahedron

Volumn 53, Issue 38, 1997, Pages 13009-13026

  Bernardi, Anna ^a   Karamfilova, Katia ^a   Sanguinetti, Silvia ^a   Scolastico, Carlo ^a  

^a CNR   (Italy)

Author keywords

[No Author keywords available]

Indexed keywords

CYCLOPENTENONE DERIVATIVE;

ARTICLE; CATALYSIS; CHIRALITY; DRUG SYNTHESIS; ENANTIOMER; IN VITRO STUDY; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; PRIORITY JOURNAL; REACTION ANALYSIS; STEREOCHEMISTRY;

EID: 0030768261     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4020(97)00825-9     Document Type: Article

References (112)

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17. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
18. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
19. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
20. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
21. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
22. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
23. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
24. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
25. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
26. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
27. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
28. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
29. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
30. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
31. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
32. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
33. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
34. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
35. Numerous examples of enantioselective Michael additions of enolates and their synthetic equivalents that use chiral auxiliaries either on the donor or the acceptor have been reported. See, for instance: Perlmutter, P. in Tetrahedron Organic Chemistry Series. Vol. 9: Conjugate Addition Reactions in Organic Synthesis, Ed. Baldwin, J.E., FRS & Magnus, P.D., FRS, Pergamon Press: Oxford, 1992; Oare, D.A.; Heathcock, C.H. Top.Stereochem. 1989, 19, 227-407. For some more recent examples see also: Schultz, A.G.; Lee, H. Tetrahedron Letters 1992, 33, 4397; Yamada, F.; Kozikoswki, A.P.; Reddy, E.R.; Pang, Y.-P.; Miller, J.H.; McKinney, M. J.Am.Chem.Soc. 1991, 113, 4695; Ouvrard, N.; Rodriguez, J.; Santelli, M. Angew.Chem.Int.Ed.Engl. 1992, 31, 1651; Hanessian, S.; Gomstyan, A. Tetrahedron Letters 1994, 35, 7509; Barluenga, J.; Montserrat, J.M.; Florez, J.; Garcia-Granda, S.; Martin, E. Chem.Eur .J . 1995, 1, 236; Yamazaki, T.; Haga, J.; Kitazume, T. Chem.Lett. 1991, 2175; Suzuki, K.; Seebach, D. Liebigs Ann. Chem. 1992, 51; Annunziata, R.; Cinquini, M.; Cozzi, F.; Raimondi, L.; Pilati, T. Tetrahedron :Asymmetry 1991, 2, 1329; Tatsukawa, A.; Dan, M.; Ohbatake, M.; Kawatake, K.; Fukata, T.; Wada, E.; Kanemasa, S.; Kakei, S. J.Org.Chem. 1993, 58, 4221; Kanemasa, S.; Nomura, M.; Yoshinaga, S.; Yamamoto, H. Tetrahedron 1995, 57, 10463; Kanemasa, S.; Nomura, M. Tetrahedron Lett. 1994, 35, 143; Duhamel, L.; Duhamel, P.; Enders, D.; Karl, W.; Leger, F.; Poirier, J.M.; Raabe, G. Synthesis 1991, 649; Enders, D.; Kirchoff, J.; Mannes, D.; Raabe, G. Synthesis 1995, 659; Enders, D.; Karl, W. Synlett 1992, 895; Enders D., Klatt M. Synthesis 1996, 1403 and references therein; Shimizu, M.; Onogawa, Y.; Fujisawa, T. Synlett 1996, 827 and references therein; Angert H. Czerwonka R. Reissig HU. Liebigs Ann. Chem. 1996, 259.
36. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986,51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
37. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
38. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
39. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
40. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
41. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
42. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
43. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
44. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
45. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
46. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
47. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
48. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
49. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M.
50. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
51. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
52. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
53. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
54. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
55. Wynberg, H.; Helder, R. Tetrahedron Lett. 1975, 16, 4057-4060; Herman, K.; Wynberg, H. J.Org.Chem. 1979, 44, 2238-2244; Conn, R.S.E., Lovell, A.V.; Karady, S.; Weinstock, L.M. J.Org.Chem. 1986, 51,4710; Inagaki, M.; Hiratake, J.; Yamamoto, Y.; Oda, J. Bull.Chem.Soc.Jpn. 1987, 60, 4121; Brünner, H.; Hammer, B. Angew.Chem. Int.Ed.Engl. 1984, 23, 312-313; Desirnoni, G.; Quadrelli, P.; Righetti, P.P. Tetrahedron 1990, 46, 2927-2934; Botteghi, C.; Schionato, A.; Boga, C., Fava, A. J.Mol.Catal. 1991, 66, 7-21; Cram, D.J.; Sogah, G.D.Y. J.Chem.Soc.Chem.Commun. 1981, 625-628; Alonso-Lòpez, M.; Martin-Lomas M.; Penadés, S. Tetrahedron Lett. 1986, 27, 3551-3554; Alonso-Lòpez, M.; Jimenez-Barbero, J.; Martin-Lomas, M.; Penadés, S. Tetrahedron 1988, 44, 1535-1543; Takasu, M.; Wakabayashi, H.; Furuta, K.; Yamamoto, H. Tetrahedron Lett. 1988, 29, 6943-6946; Aoki, S.; Sasaki, S.; Koga, K. Tetrahedron Lett. 1989, 30, 7229-7230; Aoki, S.; Sasaki, S.; Koga, K. Heterocycles 1992, 33, 493-495; Kumamoto, T.; Aoki, S.; Nakajima, M.; Koga, K. Tetrahedron Asymm. 1994, 5, 1431; Yamaguchi, M.; Shiraishi, T.; Hirama, M. Angew.Chem. Int.Ed.Engl. 1993, 32, 1176-1178; Yamaguchi, M.; Shiraishi, T.; Igarashi, Y.; Hirama, M. Tetrahedron Lett. 1994, 35, 8233-8236; Kawara, A.; Taguci, T. Tetrahedron Lett. 1994, 55, 8805-8808; Sasai, H.; Arai, T.; Shibasaki, M. J.Am.Chem.Soc. 1994, 116, 1571-1572; Sasai, H.; Arai, T.; Satow, Y.; Houk, K.N.; Shibasaki, M. J.Am.Chem.Soc. 1995, 117, 6194-6198; Sawamura, M.; Hamashima, H.; Ito, Y. Tetrahedron 1994, 50, 4439-4454; Sasai, H.; Emori, E.; Arai, T.; Shibasaki, M. Tetrahedron Lett. 1996, 37, 5561-5564; Arai, T.; Sasai, H.; Aoe, K.; Okamura, K.; Date, T.; Shibasaki, M. Angew.Chem.Int.Ed, Engl 1996, 35, 104.
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