Tetrakis(trifluoromethanesulfonyl)propane: highly effective Brønsted acid catalyst for vinylogous Mukaiyama–Michael reaction of α,β-enones with silyloxyfurans
作者:Arata Takahashi、Hikaru Yanai、Takeo Taguchi
DOI:10.1039/b800815a
日期:——
1,1,3,3-Tetrakis(trifluoromethanesulfonyl)propane was found as an excellent Brønsted acid catalyst for the MukaiyamaâMichael reaction of α,β-enones with 2-silyloxyfurans; using β,β-disubstituted enones as a Michael acceptor, an excellent yield construction of quaternary carbon centers could be achieved; in addition, very low catalyst loading of Brønsted acid was used in a range from 0.05 to 1.0 mol%.
1,1,3,3-四(氟甲烷磺酰)丙烷被发现是一种优秀的布朗斯特酸催化剂,用于α,β-烯酮与2-硅氧基呋喃的Mukaiyama-Michael反应;使用β,β-二取代烯酮作为迈克尔受体,可以实现优异的四级碳中心构建。此外,布朗斯特酸的催化剂用量很低,范围在0.05%到1.0%摩尔之间。