Synthesis of Epoxides from Alkyl Bromides and Alcohols with in Situ Generation of Dimethyl Sulfonium Ylide in DMSO Oxidations
作者:Zhi-Wei Zhang、Hai-Bo Li、Jin Li、Cui-Cui Wang、Juan Feng、Yi-Hua Yang、Shouxin Liu
DOI:10.1021/acs.joc.9b02621
日期:2020.1.17
the readily available alkyl bromides and alcohols to value-added epoxides using dimethyl sulfoxide (DMSO) under mild reaction conditions has been developed. Benzyl and allyl bromides, and activated and unactivated alcohols all proceeded smoothly to give epoxides in high to excellent yield. Dimethyl sulfide, generated by DMSO oxidations, was in situ elaborated to form the substituted dimethyl sulfonium
已经开发了在温和的反应条件下使用二甲基亚砜(DMSO)将易得的烷基溴化物和醇类直接转化为增值环氧化物的方法。苄基和烯丙基溴,以及活化和未活化的醇均能顺利进行,从而以高至极好的收率得到环氧化物。由DMSO氧化生成的二甲基硫醚被原位合成形成取代的二甲基sulf内酯物种,该二甲基sulf内酯物种分别以多米诺和一锅方式参与Corey-Chaykovsky环氧化。