Highly enantioselective cyclopropanation of styrene derivatives using Co(III)-salen complex as a catalyst

被引:139
作者
Fukuda, T [1 ]
Katsuki, T [1 ]
机构
[1] KYUSHU UNIV 33,FAC SCI,DEPT CHEM,HIGASHI KU,FUKUOKA 81281,JAPAN
关键词
D O I
10.1016/S0040-4020(97)00423-7
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Optically active (salen)cobalt(III) bromide complex 6-Br was found to be an efficient catalyst for asymmetric cyclopropanation of styrene derivatives. For example, the reaction of 4-chlorostyrene and tert-butyl diazoacetate in the presence of 6-Br proceeded with high enantioselectivity of 96% ee as well as high trans-cis selectivity (97:3) to give tert-butyl 2-(4-chlorophenyl)cyclopropane-1-carboxylate as a major product. (C) 1997 Elsevier Science Ltd.
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页码:7201 / 7208
页数:8
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