Iron-Catalyzed Unexpected Easy Access to Stereodefined Trimethylsilyl Vinyl Ketenes
作者:Guobi Chai、Chunling Fu、Shengming Ma
DOI:10.1021/ol3016176
日期:2012.8.17
Stereodefined trimethylsilyl vinyl ketenes with polysubstitution have been synthesized highly regio- and stereoselectively via an iron-catalyzed reaction of 2-trimethylsilyl-2,3-allenoates with Grignard reagents in good to excellent yields. The reaction was believed to proceed via a conjugate addition and elimination mechanism. Applications of the products for the synthesis of stereodefined α-silyl-β
通过铁催化的2-三甲基甲硅烷基-2,3-脲基酸酯与格利雅试剂的高度催化和立体选择性合成,具有高取代度的立体定义的三甲基甲硅烷基乙烯基乙烯酮具有很高的收率。据信该反应是通过共轭加成和消除机理进行的。仔细证明了该产物在合成立体定义的α-甲硅烷基-β,γ-不饱和烯酮,立体定义的三烯和多取代的苯酚中的应用。