A general method for the vinylation of nitrones. Synthesis of allyl hydroxylamines and allyl amines

Synthetic Communications

Volumn 30, Issue 16, 2000, Pages 2989-3021

  Merino, Pedro ^a   Anoro, Sonia ^a   Franco, Santiago ^a   Gascon, Jose M ^a   Martin, Victor ^a   Merchan, Francisco L ^a   Revuelta, Julia ^a   Tejero, Tomas ^a   Tuñon, Victoria ^a  

^a UNIVERSITY OF ZARAGOZA   (Spain)

Author keywords

[No Author keywords available]

Indexed keywords

ALLYLAMINE DERIVATIVE; HYDROXYLAMINE; NITRONE DERIVATIVE; ORGANOMETALLIC COMPOUND; SERINE DERIVATIVE; VINYL DERIVATIVE;

ARTICLE; CHEMICAL MODIFICATION; CHEMICAL REACTION; CHEMICAL STRUCTURE; MOLECULAR RECOGNITION; REACTION ANALYSIS; STEREOCHEMISTRY; SYNTHESIS;

EID: 0033942775     PISSN: 00397911     EISSN: None     Source Type: Journal    
DOI: 10.1080/00397910008087449     Document Type: Article

References (79)

1. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
2. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
3. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
4. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
5. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
6. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
7. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
8. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
9. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
10. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
11. For leading references see inter alia: (a) Katritzky, A.R.; Piffl, M.; Lang, H. and Anders, E. Chem. Rev. 1999, 99, 665. (b) Vincent, M.A.; Hillier, I.H.; Hall, R.J. and Thomas, E.J. J. Org. Chem. 1999, 64, 4680. (c) Hanessian, S.; Margarita, R.; Hall, A. and Luo, X. Tetrahedron Lett. 1998, 39, 5883. (d) Iseki, K.; Kuroki, Y.; Takahashi, M.; Kishimoto, S. and Kobayashi, Y. Tetrahedron , 1997, 53, 3513. (e) Almendros, P. and Thomas, E.J. J. Chem. Soc. Perkin Trans 1 1997, 2561. (f) Hanessian, S.; Park, H. and Yang, R.-Y. Synlett 1997, 353. (g) Thomas, E.J. Chem. Commun. 1997, 411. (h) McNeill, A.H. and Thomas, E.J. Synthesis 1994, 322. (i) Yamamoto, Y. and Asao, N. Chem. Rev. 1993, 93, 2207. (j) Hafner, A.; Duthaler, R.O.; Marti, R.; Rihs, G.; Rothe-Streit, P. and Schwarzenbach, F. J. Am. Chem. Soc. 1992, 114, 2321. (k) Hoffmann, R.W. Angew. Chem. Int. Ed. Engl. 1982, 21, 556.
12. (a) Masuyama Y.; Tosa, J. and Kurusu, Y. Chem. Commun. 1999, 1075.
13. (b) Fang, X.; Johannsen, M.; Yao, S.; Gathergood, N.; Hazell, R.N. and Jorgensen, K.A. J. Org. Chem. 1999, 64, 4844.
14. (c) Wang, D.-K.; Zhou, Y,-G.; Tang, Y.; Hou, X.-L. and Dai, L.-X. J. Org. Chem. 1999, 64, 4233.
15. (d) Nakamura, K.; Nakamura, H. and Yamamoto, Y. J. Org. Chem. 1999, 64, 2614.
16. (e) Chen, G.-M.; Ramachandran, P.V. and Brown, H.C. Angew. Chem. Int. Ed. Engl. 1999, 38, 825.
17. (f) Negoro, N.; Yanada, R.; Okaniwa, M.; Yamada, K. and Fujita, T. Synlett 1998, 835.
18. (g) Basile, T.; Bocoum, A.; Savoia, D. and Umani-Ronchi, A. J. Org. Chem. 1994, 59, 7766.
19. (h) Hallett, D. and Thomas, E.J. Chem. Commun. 1995, 657.
20. (i) Yamamoto, Y.; Nishii, S.; Maruyama, K.; Komatsu, T. and Ito, W. J. Am. Chem. Soc. 1986, 108, 7778.
21. (j) Yamamoto, Y.; Komatsu, T. and Maruyama, K. J. Org. Chem. 1985, 50, 3115.
22. (k) Yamamoto, Y.; Ito, W. and Maruyama, K. Chem. Commun. 1985, 1131.
23. (l) Wuts, P.G.M. and Jung, Y.-W. J. Org. Chem. 1991, 56, 365.
24. (m) Yanagisawa, A.; Ogasawara, K.; Yasue, K. and Yamamoto, H. Chem. Commun. 1996, 367.
25. (n) Wang, D.-K.; Dai, L.-X. and Hou, X.-L. Tetrahedron Lett. 1995, 36, 8649.
26. (o) Masse, C.E. and Panek, J.S. Chem. Rev. 1995, 95, 1293.
27. (p) Alvaro, G.; Martelli, G.; Savoia, D. and Zoffoli, A. Synthesis 1998, 1773.
28. (q) Bandini, M.; Cozzi, P.O.; Umani-Ronchi, A. and Villa, M. Tetrahedron 1999, 55, 8103. See also refs. lg and li.
29. (a) Marco, J.A.; Carda, M.; Murga, J.; Rodriguez, S.; Falomir, E. and Oliva, M. Tetrahedron: Asymmetry 1998, 9, 1679.
30. (b) Marco, J.A.; Carda, M.; Murga, J.; Gonzalez, F. and Falomir, E. Tetrahedron Lett. 1997, 38, 1841.
31. (c) Brown, D.S.; Gallagher, P.T.; Lightfoot, A.P.; Moody, C.J.; Slawin, A.M.Z. and Swann, E. Tetrahedron 1995, 51, 11473.
32. Denmark, S.E.; Weber, T. and Piotrowski, D.W. J. Am. Chem. Soc. 1987, 109, 2224.
33. (a) Lombardo, M.; Spada, S. and Trombini, C. Eur. J. Org. Chem. 1998, 2361.
34. (b) Gianotti, M.; Lombardo, M. and Trombini, C. Tetrahedron Lett. 1998, 39, 1643.
35. (c) Fiumana, A.; Lombardo, M. and Trombini, C. J. Org. Chem. 1997, 62, 5623.
36. (d) Wuts, P.G.M. and Jung, Y.-W. J. Org. Chem. 1988, 53, 1957.
37. (e) Mancini, F.; Piazza, M.G. and Trombini, C. J. Org. Chem. 1991, 56, 4246.
38. (f) Marco, J.A.; Carda, M.; Murga, J.; Portoles, R.; Falomir, E. and Lex, J. Tetrahedron Lett. 1998, 39, 3237.
39. (g) Dhavale, D.D.; Gentilucci, L.; Piazza, M.G. and Trombini, C. Liebigs Ann. Chem. 1992, 1289.
40. (h) Merino, P.; Franco, S.; Gascon, J.M.; Merchan, F.L. and Tejero, T. Tetrahedron: Asymmetry 1999, 10, 1867.
41. "Formation of C-C bonds by Addition to Imino Groups", (several authors) In "Stereoselective Synthesis, Houben-Weyl, Helmchen, G.; Hoffmann, R.W.; Mulzer, J. and Schaumann, E., Eds., Thieme, Stuttgart, 1996; Vol. 3, p 1833 and references cited therein.
42. Imines: (a) Schwardt, O.; Veith, U.; Gaspard, C. and Jager, V. Synthesis 1999, 1473. (b) Cogan, D.A.; Liu, G. and Ellman, J. Tetrahedron 1999, 55, 8883. (c) Hamon, D.P.G.; Massy-Westropp, R.A. and Razzino, P. Tetrahedron 1992, 48, 5163. (d) Tomioka, K.; Inoue, I.; Shindo, M. and Koga, K. Tetrahedron Lett. 1990, 31, 6681. (e) Betz, J. and Heuschmann, M. Tetrahedron Lett. 1995, 36, 4043. (f) Scialdone, M.A. and Meyers, A.I. Tetrahedron Lett. 1994, 35, 7533. Hydrazones: (g) Claremon, D.A.; Lumma, P.K. and Phillips, B.T. J. Am. Chem. Soc. 1986, 108, 8265. Nitrones: (h) Ammenn, J.; Altman, K.-H. and Bellus, D. Helv. Chim. Acta 1997, 80, 1589. (i) Chang, Z.-Y. and Coates, R.M. J. Org. Chem. 1990, 55, 3475. See also ref. Sf.
43. Imines: (a) Schwardt, O.; Veith, U.; Gaspard, C. and Jager, V. Synthesis 1999, 1473. (b) Cogan, D.A.; Liu, G. and Ellman, J. Tetrahedron 1999, 55, 8883. (c) Hamon, D.P.G.; Massy-Westropp, R.A. and Razzino, P. Tetrahedron 1992, 48, 5163. (d) Tomioka, K.; Inoue, I.; Shindo, M. and Koga, K. Tetrahedron Lett. 1990, 31, 6681. (e) Betz, J. and Heuschmann, M. Tetrahedron Lett. 1995, 36, 4043. (f) Scialdone, M.A. and Meyers, A.I. Tetrahedron Lett. 1994, 35, 7533. Hydrazones: (g) Claremon, D.A.; Lumma, P.K. and Phillips, B.T. J. Am. Chem. Soc. 1986, 108, 8265. Nitrones: (h) Ammenn, J.; Altman, K.-H. and Bellus, D. Helv. Chim. Acta 1997, 80, 1589. (i) Chang, Z.-Y. and Coates, R.M. J. Org. Chem. 1990, 55, 3475. See also ref. Sf.
44. Imines: (a) Schwardt, O.; Veith, U.; Gaspard, C. and Jager, V. Synthesis 1999, 1473. (b) Cogan, D.A.; Liu, G. and Ellman, J. Tetrahedron 1999, 55, 8883. (c) Hamon, D.P.G.; Massy-Westropp, R.A. and Razzino, P. Tetrahedron 1992, 48, 5163. (d) Tomioka, K.; Inoue, I.; Shindo, M. and Koga, K. Tetrahedron Lett. 1990, 31, 6681. (e) Betz, J. and Heuschmann, M. Tetrahedron Lett. 1995, 36, 4043. (f) Scialdone, M.A. and Meyers, A.I. Tetrahedron Lett. 1994, 35, 7533. Hydrazones: (g) Claremon, D.A.; Lumma, P.K. and Phillips, B.T. J. Am. Chem. Soc. 1986, 108, 8265. Nitrones: (h) Ammenn, J.; Altman, K.-H. and Bellus, D. Helv. Chim. Acta 1997, 80, 1589. (i) Chang, Z.-Y. and Coates, R.M. J. Org. Chem. 1990, 55, 3475. See also ref. Sf.
45. Imines: (a) Schwardt, O.; Veith, U.; Gaspard, C. and Jager, V. Synthesis 1999, 1473. (b) Cogan, D.A.; Liu, G. and Ellman, J. Tetrahedron 1999, 55, 8883. (c) Hamon, D.P.G.; Massy-Westropp, R.A. and Razzino, P. Tetrahedron 1992, 48, 5163. (d) Tomioka, K.; Inoue, I.; Shindo, M. and Koga, K. Tetrahedron Lett. 1990, 31, 6681. (e) Betz, J. and Heuschmann, M. Tetrahedron Lett. 1995, 36, 4043. (f) Scialdone, M.A. and Meyers, A.I. Tetrahedron Lett. 1994, 35, 7533. Hydrazones: (g) Claremon, D.A.; Lumma, P.K. and Phillips, B.T. J. Am. Chem. Soc. 1986, 108, 8265. Nitrones: (h) Ammenn, J.; Altman, K.-H. and Bellus, D. Helv. Chim. Acta 1997, 80, 1589. (i) Chang, Z.-Y. and Coates, R.M. J. Org. Chem. 1990, 55, 3475. See also ref. Sf.
46. Imines: (a) Schwardt, O.; Veith, U.; Gaspard, C. and Jager, V. Synthesis 1999, 1473. (b) Cogan, D.A.; Liu, G. and Ellman, J. Tetrahedron 1999, 55, 8883. (c) Hamon, D.P.G.; Massy-Westropp, R.A. and Razzino, P. Tetrahedron 1992, 48, 5163. (d) Tomioka, K.; Inoue, I.; Shindo, M. and Koga, K. Tetrahedron Lett. 1990, 31, 6681. (e) Betz, J. and Heuschmann, M. Tetrahedron Lett. 1995, 36, 4043. (f) Scialdone, M.A. and Meyers, A.I. Tetrahedron Lett. 1994, 35, 7533. Hydrazones: (g) Claremon, D.A.; Lumma, P.K. and Phillips, B.T. J. Am. Chem. Soc. 1986, 108, 8265. Nitrones: (h) Ammenn, J.; Altman, K.-H. and Bellus, D. Helv. Chim. Acta 1997, 80, 1589. (i) Chang, Z.-Y. and Coates, R.M. J. Org. Chem. 1990, 55, 3475. See also ref. Sf.
47. Imines: (a) Schwardt, O.; Veith, U.; Gaspard, C. and Jager, V. Synthesis 1999, 1473. (b) Cogan, D.A.; Liu, G. and Ellman, J. Tetrahedron 1999, 55, 8883. (c) Hamon, D.P.G.; Massy-Westropp, R.A. and Razzino, P. Tetrahedron 1992, 48, 5163. (d) Tomioka, K.; Inoue, I.; Shindo, M. and Koga, K. Tetrahedron Lett. 1990, 31, 6681. (e) Betz, J. and Heuschmann, M. Tetrahedron Lett. 1995, 36, 4043. (f) Scialdone, M.A. and Meyers, A.I. Tetrahedron Lett. 1994, 35, 7533. Hydrazones: (g) Claremon, D.A.; Lumma, P.K. and Phillips, B.T. J. Am. Chem. Soc. 1986, 108, 8265. Nitrones: (h) Ammenn, J.; Altman, K.-H. and Bellus, D. Helv. Chim. Acta 1997, 80, 1589. (i) Chang, Z.-Y. and Coates, R.M. J. Org. Chem. 1990, 55, 3475. See also ref. Sf.
48. Imines: (a) Schwardt, O.; Veith, U.; Gaspard, C. and Jager, V. Synthesis 1999, 1473. (b) Cogan, D.A.; Liu, G. and Ellman, J. Tetrahedron 1999, 55, 8883. (c) Hamon, D.P.G.; Massy-Westropp, R.A. and Razzino, P. Tetrahedron 1992, 48, 5163. (d) Tomioka, K.; Inoue, I.; Shindo, M. and Koga, K. Tetrahedron Lett. 1990, 31, 6681. (e) Betz, J. and Heuschmann, M. Tetrahedron Lett. 1995, 36, 4043. (f) Scialdone, M.A. and Meyers, A.I. Tetrahedron Lett. 1994, 35, 7533. Hydrazones: (g) Claremon, D.A.; Lumma, P.K. and Phillips, B.T. J. Am. Chem. Soc. 1986, 108, 8265. Nitrones: (h) Ammenn, J.; Altman, K.-H. and Bellus, D. Helv. Chim. Acta 1997, 80, 1589. (i) Chang, Z.-Y. and Coates, R.M. J. Org. Chem. 1990, 55, 3475. See also ref. Sf.
49. Imines: (a) Schwardt, O.; Veith, U.; Gaspard, C. and Jager, V. Synthesis 1999, 1473. (b) Cogan, D.A.; Liu, G. and Ellman, J. Tetrahedron 1999, 55, 8883. (c) Hamon, D.P.G.; Massy-Westropp, R.A. and Razzino, P. Tetrahedron 1992, 48, 5163. (d) Tomioka, K.; Inoue, I.; Shindo, M. and Koga, K. Tetrahedron Lett. 1990, 31, 6681. (e) Betz, J. and Heuschmann, M. Tetrahedron Lett. 1995, 36, 4043. (f) Scialdone, M.A. and Meyers, A.I. Tetrahedron Lett. 1994, 35, 7533. Hydrazones: (g) Claremon, D.A.; Lumma, P.K. and Phillips, B.T. J. Am. Chem. Soc. 1986, 108, 8265. Nitrones: (h) Ammenn, J.; Altman, K.-H. and Bellus, D. Helv. Chim. Acta 1997, 80, 1589. (i) Chang, Z.-Y. and Coates, R.M. J. Org. Chem. 1990, 55, 3475. See also ref. Sf.
50. Imines: (a) Schwardt, O.; Veith, U.; Gaspard, C. and Jager, V. Synthesis 1999, 1473. (b) Cogan, D.A.; Liu, G. and Ellman, J. Tetrahedron 1999, 55, 8883. (c) Hamon, D.P.G.; Massy-Westropp, R.A. and Razzino, P. Tetrahedron 1992, 48, 5163. (d) Tomioka, K.; Inoue, I.; Shindo, M. and Koga, K. Tetrahedron Lett. 1990, 31, 6681. (e) Betz, J. and Heuschmann, M. Tetrahedron Lett. 1995, 36, 4043. (f) Scialdone, M.A. and Meyers, A.I. Tetrahedron Lett. 1994, 35, 7533. Hydrazones: (g) Claremon, D.A.; Lumma, P.K. and Phillips, B.T. J. Am. Chem. Soc. 1986, 108, 8265. Nitrones: (h) Ammenn, J.; Altman, K.-H. and Bellus, D. Helv. Chim. Acta 1997, 80, 1589. (i) Chang, Z.-Y. and Coates, R.M. J. Org. Chem. 1990, 55, 3475. See also ref. Sf.
51. For reviews see: (a) Merino, P.; Franco, S.; Merchan, F.L. and Tejero, T. Synlett in press, (b) Merino, P. and Tejero, T. Molecules 1999, 4, 165. (c) Merino, P.; Franco, S.; Merchan, F.L. and Tejero, T. In Recent Res. Devel. in Synth. Organic Chem. Pandalai, S.G. (Ed.); Transworld Research Network, Trivandrum, India. 1998, Vol. 1, pp. 109.
52. For reviews see: (a) Merino, P.; Franco, S.; Merchan, F.L. and Tejero, T. Synlett in press, (b) Merino, P. and Tejero, T. Molecules 1999, 4, 165. (c) Merino, P.; Franco, S.; Merchan, F.L. and Tejero, T. In Recent Res. Devel. in Synth. Organic Chem. Pandalai, S.G. (Ed.); Transworld Research Network, Trivandrum, India. 1998, Vol. 1, pp. 109.
53. For reviews see: (a) Merino, P.; Franco, S.; Merchan, F.L. and Tejero, T. Synlett in press, (b) Merino, P. and Tejero, T. Molecules 1999, 4, 165. (c) Merino, P.; Franco, S.; Merchan, F.L. and Tejero, T. In Recent Res. Devel. in Synth. Organic Chem. Pandalai, S.G. (Ed.); Transworld Research Network, Trivandrum, India. 1998, Vol. 1, pp. 109.
54. For preliminary communications see: (a) Merino, P.; Anoro, S.; Castillo, E.; Merchan, F.L. and Tejero, T. Tetrahedron: Asymmetry 1996, 7, 1887. (b) Dondoni, A.; Merchan, F.L.; Merino, P. and Tejero, T. Synth. Commun. 1994, 24, 2551.
55. For preliminary communications see: (a) Merino, P.; Anoro, S.; Castillo, E.; Merchan, F.L. and Tejero, T. Tetrahedron: Asymmetry 1996, 7, 1887. (b) Dondoni, A.; Merchan, F.L.; Merino, P. and Tejero, T. Synth. Commun. 1994, 24, 2551.
56. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
57. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
58. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
59. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
60. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
61. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
62. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
63. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
64. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
65. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
66. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
67. For some recent references see: (a) Xu, Q. and Dittmer, D.C. Tetrahedron Lett. 1999, 40, 2255. (b) Kumar, H.M.S.; Anjaneyulu, S.; Reddy, B.V.S. and Yadav, J.S. Synlett 1999, 551. (c) Chandrasekhar, S. and Mohapatra, S. Tetrahedron Lett. 1998, 39, 6415. (d) Katritzky, A.R.; Cheng, D. and Li, J. J. Org. Chem. 1998, 63, 3438. (e) Alcon, M.; Poch, M.; Moyano, A.; Pericas, M.A. and Riera, A. Tetrahedron: Asymmetry 1997, 8, 2967. (f) Veenstra, S.J. and Schmid, P. Tetrahedron Lett. 1997, 38, 997. (g) Reginato, G.; Mordini, A:; Messina, F.; Degl'Innocenti, A. and Poli, G. Tetrahedron 1996, 52, 10985. (h) Enders, D. and Schankat, J. Helv. Chim. Acta 1995, 78, 970. (i) Palacios, F.; Aparicio, D. and Garcia, J. Synlett 1994, 260. (j) Larock, R.C.; Wang, Y.; Lu, Y. and Russell, C.E. J. Org. Chem. 1994, 59, 8107. (k) Alcon, M.; Canas, M.; Poch, M.; Moyano, A.; Pericas, M. and Riera, A. Tetrahedron Lett. 1994, 35, 1589. For a review see: (l) Cheik, R.B.; Chaabouni, R.; Laurent, A.; Mison, P. and Nafti, A. Synthesis 1983, 685.
68. Merino, P.; Castillo, E.; Franco, S.; Merchan, F.L. and Tejero, T. Tetrahedron 1998, 54, 12301.
69. Wakefield, B.J. "Organolithium Methods", London, Academic Press, 1988, p. 46.
70. Merino, P.; Franco, S.; Merchan, F.L. and Tejero, T. J. Org. Chem. 1998, 63, 5627.
71. Merino, P.; Lanaspa, A.; Merchan, F.L. and Tejero, T. J. Org. Chem. 1996, 61, 9028.
72. Murakami, M.; Ito, H. and Ito, Y. J. Org. Chem. 1993, 58, 6766.
73. Merino, P.; Franco, S.; Merchan, F.L. and Tejero, T. Tetrahedron: Asymmetry 1997, 8, 3489.
74. Dondoni, A.; Junquera, F.; Merchan, F.L.; Merino, P.; Scherrmann, M.-C. and Tejero, T. J. Org. Chem. 1997, 62, 5484.
75. Merino, P.; Franco, S.; Gascon, J.M.; Merchan, F.L. and Tejero, T. Tetrahedron: Asymmetry 1999, 10, 1861.
76. Merino, P.; Merchan, F.L.; Tejero, T. and Lanaspa, A. Acta Cryst. Sect. C. 1996, 52, 2536.
77. Shriver, D.F., and Dredzon, M.A. "The Manipulation of Air-Sensitive Compounds", 2nd edition, Wiley-Interscience, New York, 1986.
78. Perrin, D.D. and Armarego, W.L.F. "Purification of Laboratory Chemicals", 3rd edition, Pergamon, Oxford, 1988.
79. Dondoni, A.; Franco, S.; Junquera, F.; Merchan, F.L.; Merino, P.; Tejero, T. Synth. Commun. 1994, 24, 2537-2550.