The Selective 1,2-Addition of Ketene Silyl Acetals to α,β-unsaturated Ketones Promoted by a Copper(I)-Phosphine Complex
作者:Michiharu Mitani、Kouji Ishimoto、Ryuhei Koyama
DOI:10.1246/cl.2002.1142
日期:2002.11
The thermal reaction of an α,β-unsaturatedketones with a ketene silyl acetal in the presence of the copper(I)halide-phosphine complex brought about the selective formation of the products based on 1,2-addition, while use of the copper(I)halide alone afforded the 1,4-adduct type of product.
Michael reactions of silylated nucleophiles with conjugated enones accompanied by silyl group transfer catalysed by copper(I) chloride under photoirradiation
作者:Michiharu Mitani、Yosinari Osakabe
DOI:10.1039/c39940001759
日期:——
Photoreaction of conjugated enones with silylated nucleophiles such as silyl acetals, silyl enol ethers and even an allyl silane resulted in the formation of Michael adducts accompanied by transfer of the silyl group.
Highly effective catalysts for the conjugate addition of silyl ketene acetals to enones (Mukaiyama-Michael reaction)
作者:Valérie Berl、Günter Helmchen、Stephanie Preston
DOI:10.1016/s0040-4039(00)76519-1
日期:1994.1
Conjugate additions of O-silylated acetals to simple enones have been reported to proceed without a catalyst if acetonitrile is used as solvent. Inability to repeat this procedure led to the discovery that an as yet unknown species formed from P4O10 in acetonitrile displays high catalytic activity.
Addition of ketene trimethylsilyl acetals to .alpha.,.beta.-unsaturated ketones: a new strategy for Michael addition of ester enolates