1-Chloroalkyl<i>p</i>-Tolyl Sulfoxides as Acetylide Anion Equivalent: A Novel Synthesis Including Asymmetric Synthesis of Propargylic Alcohols from Carbonyl Compounds
作者:Tsuyoshi Satoh、Yasumasa Hayashi、Koji Yamakawa
DOI:10.1246/bcsj.64.2153
日期:1991.7
Addition of the carbanion of 1-chloroalkyl p-tolyl sulfoxide to carbonyl compounds gave the adducts, which were heated in refluxing toluene or xylene to give vinyl chlorides in high overall yield. Dehydrochlorination of the vinyl chlorides with excess n-BuLi afforded propargylic alcohols in high yields. Asymmetric synthesis of both enantiomers of the propargylic alcohols was realized using optically
将 1-氯烷基对甲苯基亚砜的碳负离子加成到羰基化合物中得到加合物,将其在回流的甲苯或二甲苯中加热以得到高总收率的氯乙烯。用过量的正丁基锂对氯乙烯进行脱氯化氢,以高产率得到炔丙醇。炔丙醇的两种对映异构体的不对称合成是使用光学活性的 1-氯烷基对甲苯基亚砜和醛实现的。