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c) Gurjar, M.K.; Chakrabarti, A.; Venkateswara Rao, B.; Kumar, P. Tetrahedron Lett. 1997, 38, 6885;
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3. Cross couplings: a) Abarbri, M.; Parrain, J-L.; Cintrat, J-L.; Duchene, A. Synthesis 1996, 82;
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c) Mitsudo, T.; Zhang, S-W.; Kondo, T.; Watanabe, Y. Tetrahedron Lett. 1992, 33, 341;
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Mitsudo, T.1
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0001609967
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Isomerizations: d) Ma, D.; Lu, X. Tetrahedron 1990, 46, 3189 and 6919;
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Ma, D.1
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0000313286
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Huh, K.1
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Condensations: g) Herscovici, J.; Boumaiza, L.; Antonakis, K. Tetrahedron Lett. 1991, 32, 1791;
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Homologations: h) Bernabeu, M. C.; Chinchilla, R.; Najera, C. Tetrahedron Lett. 1995, 36, 3901;
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for a recent synthetic application of γ-oxygenated vinyl sulfones see: c) Alonso, I.; Carretero, J. C.; Garrido, J. L.; Magro, V.; Pedregal, C. J. Org. Chem. 1997, 62, 5682.
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Pedregal, C.5
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0001685085
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8. Johnson, W. S.; Werthemann, L.; Bartlett, W. R.; Brocksom, T. J.; Li, T-T.; Faulkner, D. J.; Petersen, M. R. J. Am. Chem. Soc. 1970, 92, 741.
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0000217402
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Trost, B. M.; Fleming, I.; Paquette, L. A. Eds. Pergamon Oxford
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9. Reviews: a) Wipf, P. Claisen Rearrangement in Comprehensive Organic Synthesis Trost, B. M.; Fleming, I.; Paquette, L. A. Eds. Pergamon Oxford, 1991, Vol. 5, p. 827;
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, pp. 827
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Wipf, P.1
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27
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0010514414
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note
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10. The observed preference for the E stereoisomer is probably a consequence of a chair-like transition state in which the substituents occupy a pseudo-equatorial orientation. (formula presented)
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29
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0001415290
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b) Aviyente, V.; Yoo, H. N.; Houk, K. N. J. Org. Chem. 1997, 62, 6121.
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Aviyente, V.1
Yoo, H.N.2
Houk, K.N.3
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31
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0010446658
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note
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13. A coupling constant J= 15.3 Hz has been observed for the C-2 proton.
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32
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0010445812
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note
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+), 230, 201, 139, 111, 67.
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