AN EUROPIUM(III) COMPLEX AS AN EFFICIENT CATALYST FOR THE MICHAEL REACTION OF ALPHA,BETA-ENONES WITH KETENE SILYL ACETALS - LIS-NMR ANALYSIS FOR THE TRANSITION-STATE THROUGH COMPLEXATION BETWEEN EUROPIUM(III) CATALYST AND ENONES

被引：6

作者：

TERADA, M ^{[1
]}

NAKAI, T ^{[1
]}

MIKAMI, K ^{[1
]}

机构：

[1] TOKYO INST TECHNOL,DEPT CHEM TECHNOL,MEGURO KU,TOKYO 152,JAPAN

来源：

INORGANICA CHIMICA ACTA | 1994年 / 222卷 / 1-2期

关键词：

CATALYSIS; MICHAEL REACTION; LANTHANIDE SHIFT REAGENT; EUROPIUM COMPLEXES;

D O I：

10.1016/0020-1693(94)03929-1

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The europium(III) complex, Eu(dppm)3, is found to be an efficient catalyst for the Michael reactions of alpha,beta-enones with ketene silyl acetals. The high levels of erythro selectivity obtained in the reaction of tert-butyl (E)-propenyl ketones (2c) with (E)-1-tert-butoxy-1-[(trimethylsilyl)oxy]propene (3d) is rationalized on the basis of the LIS-NMR analysis of the europium(III) catalyst/enone 2c complex.

引用

页码：377 / 380

页数：4

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