1-halocyclopropenes and propargylic halides from the reaction of trihalocyclopropanes with methyl lithium
作者:Mark S. Baird、William Nethercott
DOI:10.1016/s0040-4039(00)81476-8
日期:1983.1
1,1,2-Trihalocyclopropanes (halogen = chlorine or bromine) undergo 1,2-dehalogenation on reaction with methyl lithium, and in a number of cases the product is a 1-halocyclopropene. In the reactions of (20, X = Br, Cl) and (25) a rearrangement occurs even at low temperatures and propargylic halides are isolated, while (16) is converted to 2-chlorocyclohex-2-enylidene which may be trapped by furan.
1,1,2-三卤代环丙烷(卤素=氯或溴)在与甲基锂反应时会进行1,2-脱卤作用,在许多情况下,产物是1-卤代环丙烯。在(20,X = Br,Cl)和(25)的反应中,即使在低温下也会发生重排,并分离出炔丙基卤,而(16)转化为2-氯环己-2-烯基,可能被呋喃捕获。