Conjugate addition of Grignard reagents to α,β-unsaturated esters: Preparation of alkylsilylketeneacetals.
作者:Armelle Magot-Cuvru、Luis Blanco、Jacques Drouin
DOI:10.1016/s0040-4020(01)96174-5
日期:1991.9
Alkylsilylketeneacetals have been prepared by a one-step copper-catalyzed 1,4-addition of Grignard reagents to acrylic, crotonic, methacrylic and 3,3-dimethylacrylic esters in the presence of ClSiMe3. Their Z/E ratio could be modified using CuI (in the presence of HMPA) or CuII salts (without HMPA).
在ClSiMe 3存在下,通过格氏试剂的一步铜催化的1,4-加成反应将丙烯酸烷基酯,巴豆酸酯,甲基丙烯酸酯和3,3-二甲基丙烯酸酯制备成烷基甲硅烷基烯酮缩醛。可以使用Cu I(在HMPA存在下)或Cu II盐(不使用HMPA)来修改其Z / E比。