trans- or cis-β-Trimethylsilylvinyloxiranes are prepared by the reaction of aldehydes with a 3-trimethylsilylated dimethylsulfonium allylide under phase-transfer conditions or with a preformed 3-trimethylsilylated diphenylsulfonium allylide in the presence of LiBr, both in excellent yields and high stereoselectivity.
反式或顺式-β-三甲基
硅基
乙烯基环氧乙烷是通过醛与 3-三甲基
硅基化二甲基锍
烯丙基醚在相转移条件下或与预形成的 3-三甲基
硅基化二苯基锍
烯丙基醚在 LiBr 存在下发生反应而制备的,两者都具有极高的产率和立体选择性。