Indium-catalyzed intramolecular hydroarylation of aryl propargyl ethers
作者:Lorena Alonso-Marañón、M. Montserrat Martínez、Luis A. Sarandeses、José Pérez Sestelo
DOI:10.1039/c4ob02033b
日期:——
Indium(III) halides catalyze efficiently the intramolecularhydroarylation (IMHA) of aryl propargyl ethers. The reaction proceeds regioselectively with terminal and internal alkynes bearing electron-rich and electron-deficient substituents in the benzenes and alkynes affording only the 6-endo dig cyclization product. Additionally, a sequential indium-catalyzed IMHA and palladium-catalyzed Sonogashira
the generality of gold versus silver catalyzed intramolecular hydroarylation reactions of 3-[(3-arylprop-2-ynyl)oxy]benzenederivatives in terms of rings substitution were investigated. Only products deriving from 6-endo cyclization were exclusively formed. The features of substituents had a considerable effect on the reaction outcome in the presence of silver catalysis, whereas gold catalysis revealed