Iron(III) Chloride/Phenylsilane‐Mediated Cascade Reaction of Allyl Alcohols with Maleimides: Synthesis of Poly‐Substituted γ‐Butyrolactones
作者:Hua Zhang、Xiao‐Yu Zhan、Xu‐Ling Chen、Lei Tang、Shuai He、Zhi‐Chuan Shi、Yu Wang、Ji‐Yu Wang
DOI:10.1002/adsc.201900843
日期:2019.11.5
A iron‐catalyzed free radical cascade reaction of allyl alcohols with N‐substituted maleimides for accessing poly‐substituted γ‐butyrolactones has been developed. In this protocol, various allyl alcohols can open N‐substituted maleimide rings to form allyl ester intermediates, and the allyl ester intermediates can be converted into an allyl ester alkyl radicals and undergo intramolecular free radical
已开发出铁催化的烯丙醇与N-取代的马来酰亚胺的自由基级联反应,以获取多取代的γ-丁内酯。在该协议中,各种烯丙醇可以打开N-取代的马来酰亚胺环以形成烯丙基酯中间体,并且烯丙基酯中间体可以转化为烯丙基酯烷基,并进行分子内自由基加成环化反应以形成多取代的γ-丁内酯。在该方案中,还可以合成螺-γ-丁内酯化合物。同时,该策略可用于进一步构建完全取代的四氢呋喃。该反应对氧气或湿气不敏感,已以克为单位进行。