Conjugate addition of O-silylatedketeneacetals to α,β-unsaturated carbonyl compounds in acetonitrile gave quantitative yields of the corresponding β-(alkoxycarbonyl)methyl O-silyl enolates . Site specific electrophilic substitutions of yielded the corresponding α-substituted β-(alkoxycarbonyl)-methylalkanones , , and .
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