ENANTIOSELECTIVE ADDITION OF DIORGANOZINCS TO ALDEHYDES CATALYZED BY BETA-AMINO ALCOHOLS

被引:221
作者
NOYORI, R [1 ]
SUGA, S [1 ]
KAWAI, K [1 ]
OKADA, S [1 ]
KITAMURA, M [1 ]
OGUNI, N [1 ]
HAYASHI, M [1 ]
KANEKO, T [1 ]
MATSUDA, Y [1 ]
机构
[1] YAMAGUCHI UNIV,FAC SCI,DEPT CHEM,YAMAGUCHI 753,JAPAN
关键词
D O I
10.1016/0022-328X(90)85212-H
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Nucleophilic addition of dialkylzincs to aldehydes in hydrocarbon solvents is markedly accelerated by the presence of a catalytic amount of a β-dialkylamino alcohol. Use of certain sterically constrained chiral amino alcohols such as 3-exo-(dimethylamino)isoborneol or 1-t-butyl-2-piperidinoethanol effects highly enantioselective catalysis giving secondary alcohols in up to 99% ee. Dimethyl-, diethyl-, di-n-butyl-, and di-n-pentyl-zincs have been employed for the alkylation of substituted benzaldehydes and some olefinic or aliphatic aldehydes. Configurational correlation between the chiral auxiliary and alkylation products is discussed. © 1990.
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页码:19 / 37
页数:19
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