Synthesis of Highly Substituted Furans by the Electrophile-Induced Coupling of 2-(1-Alkynyl)-2-alken-1-ones and Nucleophiles
作者:Tuanli Yao、Xiaoxia Zhang、Richard C. Larock
DOI:10.1021/jo0510585
日期:2005.9.1
induced by an electrophile, provides highly substituted furans in good to excellent yields under very mild reaction conditions. Various nucleophiles, including functionally substituted alcohols, H2O, carboxylic acids, 1,3-diketones, and electron-rich arenes, and a range of cyclic and acyclic 2-(1-alkynyl)-2-alken-1-ones readily participate in these cyclizations. Iodine, NIS, and PhSeCl have proven
由AuCl 3催化或由亲电试剂诱导的2-(1-炔基)-2-链烯-1-酮与亲核试剂的偶联在非常温和的反应条件下可提供高取代率的呋喃,收率好至极佳。各种亲核试剂,包括功能性取代的醇,H 2 O,羧酸,1,3-二酮和富电子芳烃,以及各种环状和非环状的2-(1-炔基)-2-烯烃-1-酮参与这些环化。碘,NIS和PhSeCl已证明在此过程中作为亲电子试剂是成功的。使用已知的有机钯化学方法,可以很容易地将所得的含碘呋喃加工成更复杂的产品。