Stereospecific Synthesis and Acylation of cis 1-Halo 2-Trimethylsilyl Ethylenes

Abstract

Several routes to 1-halo 2-trimethylsilyl ethylenes have been previously proposed ^1-6: from ethyn7yltrimethylilane (addition of HBr^1,2), ethyltrichlorosilane (addition H by C1, followed by dehydrohalogenation and further methylation of th Si-C1 bonds)³ or by other ways ^4,5, especially by reaction of (2-trimethylsilyl) vinyl lithium with dibromoethane⁶.