In the presence of BF3·OEt2, reaction of allylstannanes with vinyl epoxides gives 1,2 or 1,4 addition products in good yield, depending on the substitution at the olefinic terminus. In either case regioselectivity is extremely high. The 1,2 adduct is applied to the elongation of a prenyl unit in polyprenyl compounds.
在
BF3·OEt2的存在下,烯丙基
锡与
乙烯环氧化物的反应根据烯烃末端的取代情况,生成1,2或1,4加成产物,并且产率良好。在任何情况下,区域选择性都极高。1,2加成产物被应用于聚烯丙基化合物中烯丙基单元的延长。