Clay montmorillonite: an efficient, heterogeneous catalyst for Michael reactions of silyl ketene acetals and silyl enol ethers with α, β-unsaturated carbonyl compounds
M Kawai, M Onaka, Y Izumi
文献索引：Kawai, Motomitsu; Onaka, Makoto; Izumi, Yusuke Bulletin of the Chemical Society of Japan, 1988 , vol. 61, p. 2157 - 2164
The Michael addition of silyl ketene acetals to α, β-unsaturated esters (enoates) is investigated. The reaction is catalyzed by clay montmorillonite (solid acid) most effectively among various, homogeneous and heterogeneous acid promoters. The montmorillonite- catalyzed reaction has several prominent features:(1) Not only α-or β-monosubstituted acrylates but also α, β-or β, β-disubstituted acrylates are applicable.(2) The highly ...
