作者:Ying Wang、Guang-Fen Du、Cheng-Zhi Gu、Fen Xing、Bin Dai、Lin He
DOI:10.1016/j.tet.2015.11.044
日期:2016.1
N-heterocyclic carbenes (NHCs) have been utilised as highly efficient organocatalysts to catalyse Peterson olefination reaction of aldehydes with trimethylsilylketene ethyl trimethylsilyl acetal or fluoro(trimethylsilyl)ketene ethyl trimethylsilyl acetal to produce the corresponding functionalized olefines in 34–93% yields with excellent stereoselectivities.
A Convenient Method for the Lewis Base-catalyzed Synthesis of α,β-Unsaturated Carboxylic Esters Using Trimethylsilylketene Ethyl Trimethylsilyl Acetal and Carbonyl Compounds
作者:Makoto Michida、Teruaki Mukaiyama
DOI:10.1246/cl.2008.704
日期:2008.7.5
A highly useful method for the synthesis of α,β-unsaturated carboxylic esters from various carbonylcompounds that uses trimethylsilylbetene ethyl trimethylsilyl acetal in the presence of a Lewis base catalyst such as acetate salts was established. This procedure gives the corresponding esters in high yields with excellent E stereoselectivity under mild conditions.
建立了一种非常有用的方法,用于从各种羰基化合物合成 α,β-不饱和羧酸酯,该方法使用三甲基甲硅烷基甜菜烯乙基三甲基甲硅烷基缩醛,在路易斯碱催化剂(如乙酸盐)的存在下。该程序在温和条件下以高收率获得相应的酯,并具有优异的 E 立体选择性。