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Enantioselective ring opening of meso-epoxides by aromatic amines catalyzed by lanthanide iodo binaphtholates
被引:112
|作者:
Carrée, F
[1
]
Gil, R
[1
]
Collin, J
[1
]
机构:
[1] Univ Paris 11, ICMMO, UMR 8075, Lab Catalyse Mol, F-91405 Orsay, France
关键词:
D O I:
10.1021/ol0475360
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
Lanthanide iodo binaphtholates are efficient enantioselective catalysts for the ring opening of meso-epoxides by various aromatic amines. The study of the influence of temperature on the ring opening of cyclohexene oxide by o-anisidine catalyzed by the samarium complex shows an isoinversion effect with the maximum enantiomeric excess at -40 C. Reactions of aniline, o-anisidine, or p=anisidine with five- or six-membered ring epoxides at this temperature allow the preparation of beta-amino alcohols with enantiomeric excesses up to 93%.
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页码:1023 / 1026
页数:4
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