Highly Regioselective Rearrangement of 2-Substituted Vinylepoxides Catalyzed by Gallium(III) Triflate
作者:Xian-Ming Deng、Xiu-Li Sun、Yong Tang
DOI:10.1021/jo050810z
日期:2005.8.1
Gallium(III) triflate catalyzed the rearrangement of 2-substituted vinylepoxides into β,γ-unsaturated carbonyl compounds with high regio- and chemoselectivity (>97/3) in low catalyst loading (1−5 mol %). The alkyl-substituted trimethylsilylvinyl epoxides gave β,γ-unsaturated ketone, but aryl-substituted vinylepoxides gave the aldehydes instead.
三氟甲磺酸镓(III)在低催化剂负载量(1-5 mol%)下以高区域和化学选择性(> 97/3)将2-取代的乙烯基环氧化物重排为β,γ-不饱和羰基化合物。烷基取代的三甲基甲硅烷基乙烯基环氧化物给出了β,γ-不饱和酮,而芳基取代的乙烯基环氧化物则给出了醛。