Simple, Convenient, and Efficient Synthesis of 2-Aryl-substituted Benzo[b]furans
作者:Yong Jiang、Botao Gao、Wenjuan Huang、Yongmin Liang、Guosheng Huang、Yongxiang Ma
DOI:10.1080/00397910701860323
日期:2008.12.31
convenient, and efficient one-pot method for the preparation of benzofuran is reported. Sonogashira coupling reaction of aryl iodides with 2-methyl-3-butyn-2-ol was used as an acetylene source in the presence of Pd(PPh3)2Cl2 and CuI. Deprotection of the acetylene moiety in the same pot using a strong base and the second Sonogashira coupling/cyclization of and substituted o-iodophenols led to the formation