Rhodium(II)‐Catalyzed Formal [4+1]‐Cycloaddition of Pyridotriazoles and Propargyl Alcohols: Synthesis of 2,5‐Dihydrofurans
作者:Xinxin Lv、Haijian Yang、Taoda Shi、Dong Xing、Xinfang Xu、Wenhao Hu
DOI:10.1002/adsc.201801497
日期:2019.3.15
A rhodium‐catalyzed formal [4+1]‐cycloaddition of pyridotriazoles and aryl propargyl alcohols is reported, providing an effective access to 2‐pyridyl‐substituted 2,5‐dihydrofuran derivatives in moderate to high yields. Mechanistically, the proposed oxonium ylide intermediate in this catalytic alkyne carbocyclization transformation is verified by an interception experiment for the first time.
据报道,铑催化吡啶并三唑与芳基炔丙醇的正式[4 + 1]-环加成反应,可提供以中到高收率有效地获得2-吡啶基取代的2,5-二氢呋喃衍生物的方法。从机理上讲,首次通过截留实验验证了该催化炔烃碳环化转化中拟议的叶立德叶立德中间体。