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

Authors
TERADA M NAKAI T MIKAMI K
Citation
M. Terada et al., 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, Inorganica Chimica Acta, 222(1-2), 1994, pp. 377-380
Citations number
38
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Inorganica Chimica Acta → ACNP
ISSN journal
00201693
Volume
222
Issue
1-2
Year of publication
1994
Pages
377 - 380
Database
ISI
SICI code
0020-1693(1994)222:1-2<377:AECAAE>2.0.ZU;2-G
Abstract
The europium(III) complex, Eu(dppm)3, is found to be an efficient cata lyst for the Michael reactions of alpha,beta-enones with ketene silyl acetals. The high levels of erythro selectivity obtained in the reacti on of tert-butyl (E)-propenyl ketones (2c) with (E)-1-tert-butoxy-1-[( trimethylsilyl)oxy]propene (3d) is rationalized on the basis of the LI S-NMR analysis of the europium(III) catalyst/enone 2c complex.