Asymmetric epoxidation of α,β-unsaturated ketones catalyzed by chiral ytterbium complexes

被引:44
作者
Chen, RF
Qian, CT
de Vries, JG
机构
[1] Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organomet Chem, Shanghai 200032, Peoples R China
[2] Dsm Res & Patents, Dept LS2CC, NL-6160 MD Geleen, Netherlands
关键词
D O I
10.1016/S0040-4039(01)01336-3
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Several derivatives of (S)-(-)-BINOL ligands with 6,6 ' -substitutents were synthesized and applied as chiral ligands in the Yb(O-i-Pr)(3)-catalyzed asymmetric epoxidation of alpha,beta -unsaturated ketones. Superior results were obtained with 6,6 ' -diphenyl-BINOL, exemplified in the asymmetric epoxidation of (E)-1,3-diphenylprop-2-en-1-one in 91% yield and up to 97% ee. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:6919 / 6921
页数:3
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