In the presence of catalytic amounts of trimethylsilyl chloride and tin(II) chloride, or trityl chloride and tin(II) triflate, activated olefins smoothly react with acetals to afford the corresponding adducts in good yields.
在催化量的三甲基甲硅烷基氯化物和氯化锡 (II) 或三苯甲基氯化物和三氟甲磺酸锡 (II) 存在下,活化的烯烃与缩醛顺利反应,以良好的收率提供相应的加合物。