A New, Efficient Method for Direct α-Alkenylation of β-Dicarbonyl Compounds and Phenols Using Alkenyltriarylbismuthonium Salts
作者:Yoshihiro Matano、Hiroshi Imahori
DOI:10.1021/jo0492721
日期:2004.8.1
β-diketone, and phenols with alkenyltriarylbismuthonium salts proceeded smoothly in the presence of 1,1,3,3-tetramethylguanidine to afford the corresponding α-alkenylated carbonyl compounds (β,γ-unsaturated carbonyl compounds) in good yields. The high leaving ability of the triarylbismuthonio group is a key driving force to achieve the C−C bond formation at the vinylic carbon under mild conditions.