ArS(ArSSAr)+ (arylbis(arylthio)sulfonium ions), which were generated and accumulated by the electrochemical oxidation of diaryl disulfides (ArSSAr) in CH2Cl2 at −78 °C, reacted with alkenes to give the corresponding diarylthio-substituted compounds in a stereospecific manner in good yields, when the reaction was quenched with a soft nucleophile, such as allylsilanes, ketene silyl acetals, and triethylamine
ArS(ArS
SAr)+(芳基双(芳
硫基)ulf离子)是通过在-78°C下于CH 2 Cl 2中对二芳基二
硫化物(ArS
SAr)进行电
化学氧化而生成和积累的,与烯烃反应生成相应的二芳
硫基取代当用柔软的亲核试剂(例如烯丙基
硅烷,
乙烯酮甲
硅烷基
乙缩醛和
三乙胺)淬灭反应时,可以立体定向的方式以良好的收率得到化合物。已经提出了一种机制,该机制涉及初始形成epi离子,然后通过ArS
SAr的攻击使环开环。还发生了ArS(ArS
SAr)+与
炔烃的反应,在相似条件下立体选择性地生成了1,2-二有机
硫代取代的烯烃。