intermediate, obtained by regio- and stereoselective vicinal functionalization of a diene utilizing an intramolecular sulfinyl group as a nucleophile, followed by stereoselective preparation of an allylic sulfide by reaction of vinylzinc bromide with an electrophilic α-chloro sulfide, and last by ring-closing metathesis reaction as the key steps. The sulfoxide, sulfilimine, and sulfur ylid prepared from this common
环糖醇和conduritol-B的对映异构体的正式全合成和conduramine-B衍
生物的合成是通过使用分子内亚磺酰基作为亲核试剂通过二烯的区域和立体选择性邻位官能化而获得的,通过共同的中间体实现的,随后通过
乙烯基溴化锌与亲电子的α-
氯硫化物的立体选择制备烯丙基
硫醚,最后通过闭环易位反应作为关键步骤。由该常见中间体制得的亚砜,亚
硫亚胺和
硫醇分别被转化为conduritol-B,conduramine-B和(-)-cyclophellitol的衍
生物。经由甲
硅烷基-Pummerer重排,
水解和一锅操作还原将甲
硅烷基
硫化物转化为羟甲基。[2,3] -Wittig-Still重排用于合成(+)-环
果糖醇。优美地证明了
硫中间体作为亲核和亲电子伙伴在总合成中的潜在用途。