Reactivity Studies of 3,3-Bis(trimethylsilyl)-2-methyl-1-propene in Lewis Acid-Catalyzed Allylation Reactions
作者:David R. Williams、Ángel I. Morales-Ramos、Catherine M. Williams
DOI:10.1021/ol0613160
日期:2006.9.1
which possess geminal bis-trimethylsilyl substitution, are readily prepared from E- or Z-alkenyl bromides. The reactivity of 3,3-bis(trimethylsilyl)-2-methyl-1-propene (1) is described and predominantly provides ene reactions with aldehydes to give alcohol 2 in the presence of BF3.OEt2. Alternatively, Sakurai allylation reactions of 1 are observed by using stronger Lewis acids in methylene chloride
具有双-三甲基甲硅烷基取代基的烯丙基化试剂很容易从E-或Z-烯基溴化物制备。描述了3,3-双(三甲基甲硅烷基)-2-甲基-1-丙烯(1)的反应性,该反应主要在BF3.OEt2存在下提供与醛的烯类反应,生成醇2。或者,通过在二氯甲烷中使用较强的路易斯酸仅产生E-三取代的链烯基硅烷3,观察到1的樱井烯丙基化反应。