Addition of dimethylsilylene to substituted 1,3-butadienes; evidence for concerted 1,2-addition followed by nonconcerted rearrangements via diradical intermediates
作者:Deqing Lei、Rong-Juh Hwang、Peter P. Caspar
DOI:10.1016/0022-328x(84)85157-8
日期:1984.8
The mechanism for addition of dimethylsilylene to substituted 1,3-butadienes has been established as consisting of a concerted 1,2-addition followed by ring-opening of vinylsilacyclopropane intermediates to diradicals that can cyclize or disproportionate. The substrates studied were cis- and trans-piperylene, isoprene, 2,3-dimethylbutadiene, cis,trans- and trans,trans-2,4-hexadiene, and trans--1,3-hexadiene
已经建立了将二甲基亚甲硅烷基加到取代的1,3-丁二烯上的机理,该机理由一致的1,2-加成,随后乙烯基硅环环丙烷中间体开环成可以环化或歧化的双自由基组成。研究的底物是顺式和反式戊二烯,异戊二烯,2,3-二甲基丁二烯,顺式,反式和反式,反式-2,4-己二烯和反式-1,3-己二烯。