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For recent reviews on asymmetric Claisen and Cope rearrangements see: (a) Frauenrath, H. In Houben-Weyl (Methods of Organic Chemistry), Stereoselective Synthesis, Vol. E21d; Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1995, 3301. (b) Metzner, P. Pure Appl. Chem. 1996, 68, 863. (c) Enders, D.; Knopp, M.; Schiffers, R. Tetrahedron: Asymmetry 1996, 7, 1847. (d) Ito, H.; Taguchi, T. Chem. Soc. Rev. 1999, 28, 43. (e) Kazmaier, U.; Maier, S.; Zumpe, F. L. Synlett 2000, 1523. (f) Allin, S. M.; Baird, R. D. Curr. Org. Chem. 2001, 395. (g) Hiersemann, M.; Abraham, L. Eur. J. Org. Chem. 2002, 1461. (h) Chai, Y.; Hong, S.-P.; Lindsay, H. A.; McFarland, C.; McIntosh, M. C. Tetrahedron 2002, 58, 2905. (i) Paquette, L. A. Tetrahedron 1997, 53, 1397.
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For recent reviews on asymmetric Claisen and Cope rearrangements see: (a) Frauenrath, H. In Houben-Weyl (Methods of Organic Chemistry), Stereoselective Synthesis, Vol. E21d; Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1995, 3301. (b) Metzner, P. Pure Appl. Chem. 1996, 68, 863. (c) Enders, D.; Knopp, M.; Schiffers, R. Tetrahedron: Asymmetry 1996, 7, 1847. (d) Ito, H.; Taguchi, T. Chem. Soc. Rev. 1999, 28, 43. (e) Kazmaier, U.; Maier, S.; Zumpe, F. L. Synlett 2000, 1523. (f) Allin, S. M.; Baird, R. D. Curr. Org. Chem. 2001, 395. (g) Hiersemann, M.; Abraham, L. Eur. J. Org. Chem. 2002, 1461. (h) Chai, Y.; Hong, S.-P.; Lindsay, H. A.; McFarland, C.; McIntosh, M. C. Tetrahedron 2002, 58, 2905. (i) Paquette, L. A. Tetrahedron 1997, 53, 1397.
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For recent reviews on asymmetric Claisen and Cope rearrangements see: (a) Frauenrath, H. In Houben-Weyl (Methods of Organic Chemistry), Stereoselective Synthesis, Vol. E21d; Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1995, 3301. (b) Metzner, P. Pure Appl. Chem. 1996, 68, 863. (c) Enders, D.; Knopp, M.; Schiffers, R. Tetrahedron: Asymmetry 1996, 7, 1847. (d) Ito, H.; Taguchi, T. Chem. Soc. Rev. 1999, 28, 43. (e) Kazmaier, U.; Maier, S.; Zumpe, F. L. Synlett 2000, 1523. (f) Allin, S. M.; Baird, R. D. Curr. Org. Chem. 2001, 395. (g) Hiersemann, M.; Abraham, L. Eur. J. Org. Chem. 2002, 1461. (h) Chai, Y.; Hong, S.-P.; Lindsay, H. A.; McFarland, C.; McIntosh, M. C. Tetrahedron 2002, 58, 2905. (i) Paquette, L. A. Tetrahedron 1997, 53, 1397.
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For recent reviews on asymmetric Claisen and Cope rearrangements see: (a) Frauenrath, H. In Houben-Weyl (Methods of Organic Chemistry), Stereoselective Synthesis, Vol. E21d; Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1995, 3301. (b) Metzner, P. Pure Appl. Chem. 1996, 68, 863. (c) Enders, D.; Knopp, M.; Schiffers, R. Tetrahedron: Asymmetry 1996, 7, 1847. (d) Ito, H.; Taguchi, T. Chem. Soc. Rev. 1999, 28, 43. (e) Kazmaier, U.; Maier, S.; Zumpe, F. L. Synlett 2000, 1523. (f) Allin, S. M.; Baird, R. D. Curr. Org. Chem. 2001, 395. (g) Hiersemann, M.; Abraham, L. Eur. J. Org. Chem. 2002, 1461. (h) Chai, Y.; Hong, S.-P.; Lindsay, H. A.; McFarland, C.; McIntosh, M. C. Tetrahedron 2002, 58, 2905. (i) Paquette, L. A. Tetrahedron 1997, 53, 1397.
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For recent reviews on asymmetric Claisen and Cope rearrangements see: (a) Frauenrath, H. In Houben-Weyl (Methods of Organic Chemistry), Stereoselective Synthesis, Vol. E21d; Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1995, 3301. (b) Metzner, P. Pure Appl. Chem. 1996, 68, 863. (c) Enders, D.; Knopp, M.; Schiffers, R. Tetrahedron: Asymmetry 1996, 7, 1847. (d) Ito, H.; Taguchi, T. Chem. Soc. Rev. 1999, 28, 43. (e) Kazmaier, U.; Maier, S.; Zumpe, F. L. Synlett 2000, 1523. (f) Allin, S. M.; Baird, R. D. Curr. Org. Chem. 2001, 395. (g) Hiersemann, M.; Abraham, L. Eur. J. Org. Chem. 2002, 1461. (h) Chai, Y.; Hong, S.-P.; Lindsay, H. A.; McFarland, C.; McIntosh, M. C. Tetrahedron 2002, 58, 2905. (i) Paquette, L. A. Tetrahedron 1997, 53, 1397.
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For recent reviews on asymmetric Claisen and Cope rearrangements see: (a) Frauenrath, H. In Houben-Weyl (Methods of Organic Chemistry), Stereoselective Synthesis, Vol. E21d; Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1995, 3301. (b) Metzner, P. Pure Appl. Chem. 1996, 68, 863. (c) Enders, D.; Knopp, M.; Schiffers, R. Tetrahedron: Asymmetry 1996, 7, 1847. (d) Ito, H.; Taguchi, T. Chem. Soc. Rev. 1999, 28, 43. (e) Kazmaier, U.; Maier, S.; Zumpe, F. L. Synlett 2000, 1523. (f) Allin, S. M.; Baird, R. D. Curr. Org. Chem. 2001, 395. (g) Hiersemann, M.; Abraham, L. Eur. J. Org. Chem. 2002, 1461. (h) Chai, Y.; Hong, S.-P.; Lindsay, H. A.; McFarland, C.; McIntosh, M. C. Tetrahedron 2002, 58, 2905. (i) Paquette, L. A. Tetrahedron 1997, 53, 1397.
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For recent reviews on asymmetric Claisen and Cope rearrangements see: (a) Frauenrath, H. In Houben-Weyl (Methods of Organic Chemistry), Stereoselective Synthesis, Vol. E21d; Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1995, 3301. (b) Metzner, P. Pure Appl. Chem. 1996, 68, 863. (c) Enders, D.; Knopp, M.; Schiffers, R. Tetrahedron: Asymmetry 1996, 7, 1847. (d) Ito, H.; Taguchi, T. Chem. Soc. Rev. 1999, 28, 43. (e) Kazmaier, U.; Maier, S.; Zumpe, F. L. Synlett 2000, 1523. (f) Allin, S. M.; Baird, R. D. Curr. Org. Chem. 2001, 395. (g) Hiersemann, M.; Abraham, L. Eur. J. Org. Chem. 2002, 1461. (h) Chai, Y.; Hong, S.-P.; Lindsay, H. A.; McFarland, C.; McIntosh, M. C. Tetrahedron 2002, 58, 2905. (i) Paquette, L. A. Tetrahedron 1997, 53, 1397.
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For recent reviews on asymmetric Claisen and Cope rearrangements see: (a) Frauenrath, H. In Houben-Weyl (Methods of Organic Chemistry), Stereoselective Synthesis, Vol. E21d; Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1995, 3301. (b) Metzner, P. Pure Appl. Chem. 1996, 68, 863. (c) Enders, D.; Knopp, M.; Schiffers, R. Tetrahedron: Asymmetry 1996, 7, 1847. (d) Ito, H.; Taguchi, T. Chem. Soc. Rev. 1999, 28, 43. (e) Kazmaier, U.; Maier, S.; Zumpe, F. L. Synlett 2000, 1523. (f) Allin, S. M.; Baird, R. D. Curr. Org. Chem. 2001, 395. (g) Hiersemann, M.; Abraham, L. Eur. J. Org. Chem. 2002, 1461. (h) Chai, Y.; Hong, S.-P.; Lindsay, H. A.; McFarland, C.; McIntosh, M. C. Tetrahedron 2002, 58, 2905. (i) Paquette, L. A. Tetrahedron 1997, 53, 1397.
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For catalytic asymmetric reactions see: (a) Avalos, M.; Babiano, R.; Cintas, P.; Jiménez, J. L.; Palacios, J. C. Tetrahedron: Asymmetry 1997, 8, 2997. (b) Brunel, J.-M.; Luukas, T. O.; Kagan, H. B. Tetrahedron: Asymmetry 1998, 9, 1941. (c) Kolb, H. C.; VanNieuwenhze, M. S.; Sharpless, K. B. Chem. Rev. 1994, 94, 2483.
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For catalytic asymmetric reactions see: (a) Avalos, M.; Babiano, R.; Cintas, P.; Jiménez, J. L.; Palacios, J. C. Tetrahedron: Asymmetry 1997, 8, 2997. (b) Brunel, J.-M.; Luukas, T. O.; Kagan, H. B. Tetrahedron: Asymmetry 1998, 9, 1941. (c) Kolb, H. C.; VanNieuwenhze, M. S.; Sharpless, K. B. Chem. Rev. 1994, 94, 2483.
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For catalytic asymmetric reactions see: (a) Avalos, M.; Babiano, R.; Cintas, P.; Jiménez, J. L.; Palacios, J. C. Tetrahedron: Asymmetry 1997, 8, 2997. (b) Brunel, J.-M.; Luukas, T. O.; Kagan, H. B. Tetrahedron: Asymmetry 1998, 9, 1941. (c) Kolb, H. C.; VanNieuwenhze, M. S.; Sharpless, K. B. Chem. Rev. 1994, 94, 2483.
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For the discussion of a stepwise reaction mechanism see chapter 6 and the literature cited therein.
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55
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Fukuzaki, T.; Kobayashi, S.; Hibi, T.; Ikuma, Y.; Ishihara, J.; Kanoh, N.; Murai, A. Org. Lett. 2002, 4, 2877; further racemic examples of model compound rearrangements are given in this reference.
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note
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The Ireland-type rearrangements are characterized by metal enolates beating chiral ligands. These reactions are discussed in chapter 5 (vide infra).
-
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75
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(b) For a synthesis of alkynyl amides see: Wei, L.-L.; Mulder, J. A.; Xiong, H.; Zificsak, C. A.; Douglas, C. A.; Hsung, R. P. Tetrahedron 2001, 57, 459.
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Watson, D.J.1
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91
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0038360192
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note
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The reversibility had been proven by subjecting the pure product to the reaction conditions resulting in the Claisen reactant and potentially some other diastereomers.
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92
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33748967191
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Wilkens, J.; Wallbaum, S.; Saak, W.; Haase, D.; Pohl, S.; Patkar, L. N.; Dixit, A. N.; Chittari, P.; Rajappa, S.; Martens, J. Liebigs Ann. 1996, 927.
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96
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0000660283
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(b) For another chelate controlled racemic ester enolate Claisen rearrangement see: Krafft, M. E.; Dasse, O. A.; Jarrett, S.; Fievre, A. J. Org. Chem. 1995, 60, 5093.
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Enders, D.1
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(c) Enders, D.; Knopp, M.; Runsink, J.; Raabe, G. Angew. Chem., Int. Ed. Engl. 1995, 34, 2278; Angew. Chem. 1995, 107, 2442.
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Enders, D.1
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(c) Enders, D.; Knopp, M.; Runsink, J.; Raabe, G. Angew. Chem., Int. Ed. Engl. 1995, 34, 2278; Angew. Chem. 1995, 107, 2442.
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(a) Maruoka, K.; Saito, S.; Yamamoto, H. J. Am. Chem. Soc. 1995, 117, 1165.
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Maruoka, K.1
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(c) For some early publications see: Maruoka, K.; Banno, H.; Yamamoto, H. J. Am. Chem. Soc. 1990, 112, 7791.
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Tayama, E.; Saito, A.; Ooi, T.; Maruoka, K. Tetrahedron 2002, 58, 8307.
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Tayama, E.1
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115
-
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0038360182
-
-
note
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The use of Hünig's base resulted in a disappointing yield of only 36%. Barton's base: pentaisopropylguanidine.
-
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116
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0032556518
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(a) Ito, H.; Sato, A.; Kobayashi, T.; Taguchi, T. J. Chem. Soc., Chem. Commun. 1998, 2441.
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Ito, H.1
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(b) Ito, H.; Sato, A.; Taguchi, T. Tetrahedron Lett. 1997, 38, 4815.
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Ito, H.1
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118
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0037684147
-
-
note
-
The boron ester formation was crucial for the Claisen rearrangement to proceed. In the absence of an o-OH group the reaction failed. The o-OH group could be replaced by a carboxylic acid function but such conversion resulted a lower yield and a decreased enantioselectivity. Additionally some p-product was isolated.
-
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-
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119
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85047695331
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(a) Kazmaier, U.; Mues, H.; Krebs, A. Chem.-Eur. J. 2002, 8, 1850.
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0032882133
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(d) Bakke, M.; Ohta, H.; Kazmaier, U.; Sugai, T. Synthesis 1999, 1671.
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Bakke, M.1
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33748845721
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(g) Kazmaier, U.; Krebs, A. Angew. Chem., Int. Ed. Engl. 1995, 34, 2012; Angew. Chem. 1995, 107, 2213.
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Kazmaier, U.1
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33748845721
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(g) Kazmaier, U.; Krebs, A. Angew. Chem., Int. Ed. Engl. 1995, 34, 2012; Angew. Chem. 1995, 107, 2213.
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129
-
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0038698412
-
-
note
-
However this special variant did obviously not suffer from any von Braun type degradation or from any [2+2]-cycloadditions as reported in previous publications and references cited therein).
-
-
-
-
130
-
-
0033949478
-
-
For potential catalysts see (a) Helmchen, G.; Pfaltz, A. Acc. Chem. Res. 2000, 33, 336. (b) Fache, F.; Schulz, E.; Tommasino, M. L.; Lemaire, M. Chem. Rev. 2000, 100, 2159.
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Helmchen, G.1
Pfaltz, A.2
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131
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0033714636
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For potential catalysts see (a) Helmchen, G.; Pfaltz, A. Acc. Chem. Res. 2000, 33, 336. (b) Fache, F.; Schulz, E.; Tommasino, M. L.; Lemaire, M. Chem. Rev. 2000, 100, 2159.
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-
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Fache, F.1
Schulz, E.2
Tommasino, M.L.3
Lemaire, M.4
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134
-
-
0038022049
-
-
note
-
Reacting non-symmetric enol ethers the palladium-catalyzed version preferentially gave the less-substituted vinyl systems. The rearrangement passed through a boat-like transition state. In contrast the proton-catalyzed reaction gave the higher substituted vinylether and the thermal rearrangement (100 °C) passed through a chair-like transition state. Regio- and stereochemistry could be influenced by a careful choice of the reaction conditions. For the discussion of a two-step reaction mechanism see Overman amidate rearrangements?
-
-
-
-
137
-
-
0035804423
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-
(c) For a racemic version see: Gester, S.; Metz, P.; Zierau, O.; Vollmer, G. Tetrahedron 2001, 57, 1015.
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Tetrahedron
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Gester, S.1
Metz, P.2
Zierau, O.3
Vollmer, G.4
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138
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0031058135
-
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(d) For a potential racemization during aromatic Claisen rearrangements see: Bernard, A. M.; Cocco, M. T.; Onnis, V.; Piras, P. P. Synthesis 1997, 41.
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Synthesis
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-
Bernard, A.M.1
Cocco, M.T.2
Onnis, V.3
Piras, P.P.4
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139
-
-
0034734314
-
-
Generally such intermediate cations could suffer from socalled abnormal 1,3 Claisen rearrangements. A catalytic variant to generate polycyclic terpenoids has been investigated by: (a) Nakamura, S.; Ishihara, K.; Yamamoto, H. J. Am. Chem. Soc. 2000, 122, 8131. (b) For further 1,3 rearrangements (chirality transfer) see: Shiina, I.; Nagasue, H. Tetrahedron Lett. 2002, 43, 5837. (c) See also: Hashimoto, H.; Jin, T.; Karikomi, M.; Seki, K.; Hagaa, K.; Uyeharaa, T. Tetrahedron Lett. 2002, 43, 3633.
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J. Am. Chem. Soc.
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Nakamura, S.1
Ishihara, K.2
Yamamoto, H.3
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140
-
-
0037068117
-
-
Generally such intermediate cations could suffer from socalled abnormal 1,3 Claisen rearrangements. A catalytic variant to generate polycyclic terpenoids has been investigated by: (a) Nakamura, S.; Ishihara, K.; Yamamoto, H. J. Am. Chem. Soc. 2000, 122, 8131. (b) For further 1,3 rearrangements (chirality transfer) see: Shiina, I.; Nagasue, H. Tetrahedron Lett. 2002, 43, 5837. (c) See also: Hashimoto, H.; Jin, T.; Karikomi, M.; Seki, K.; Hagaa, K.; Uyeharaa, T. Tetrahedron Lett. 2002, 43, 3633.
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Tetrahedron Lett.
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-
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Shiina, I.1
Nagasue, H.2
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141
-
-
0037071209
-
-
Generally such intermediate cations could suffer from socalled abnormal 1,3 Claisen rearrangements. A catalytic variant to generate polycyclic terpenoids has been investigated by: (a) Nakamura, S.; Ishihara, K.; Yamamoto, H. J. Am. Chem. Soc. 2000, 122, 8131. (b) For further 1,3 rearrangements (chirality transfer) see: Shiina, I.; Nagasue, H. Tetrahedron Lett. 2002, 43, 5837. (c) See also: Hashimoto, H.; Jin, T.; Karikomi, M.; Seki, K.; Hagaa, K.; Uyeharaa, T. Tetrahedron Lett. 2002, 43, 3633.
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Hashimoto, H.1
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Seki, K.4
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Uyeharaa, T.6
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(b) Drutu, I.; Krygowski, E. S.; Wood, J. L. J. Org. Chem. 2001, 66, 7025.
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Wood, J.L.3
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0000835722
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(c) For a direct allylation of diazoketones as a surrogate for catalyzed enantioselective Claisen rearrangements see: Davies, H. M. L.; Ren, P.; Jin, Q. Org. Lett. 2001, 3, 3587.
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Davies, H.M.L.1
Ren, P.2
Jin, Q.3
-
145
-
-
0038698416
-
-
note
-
The rhodium catalyst did not influence the Claisen rearrangement step.
-
-
-
-
147
-
-
0033794094
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(b) The Claisen rearrangement is an ideal precursor for olefin converting consecutive processes such as metathesis dihydroxylations etc.
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In contrast to the Oppolzer sultams the corresponding Evans auxiliary gave only moderate chiral induction of about 50% de building-up the new stereogenic center.
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