A Novel Method for Furan Annelation by the Regioselective Acylation of Allylic Sulfides<i>via</i>α-Silyl Intermediates
作者:Kunio Hiroi、Hiroyasu Sato
DOI:10.1055/s-1987-28081
日期:——
Aluminum chloride-catalyzed acylations of allylic phenyl sulfides 3 with acid chlorides 5 were carried out via α-silyl intermediates 4 to give γ-acylated vinylic sulfides 6 with complete regioselectivity. Treatment of the γ-acylated compounds with concentrated sulfuric acid in refluxing benzene led to the formation of α-phenylthiofurans 7, which on reductive desulfurization with Raney nickel afforded various furan derivatives 8.