Gold(<scp>i</scp>)–NHC-catalysed synthesis of benzofurans <i>via</i> migratory cyclization of 2-alkynylaryl ethers
作者:Quang Le、Christopher C. Dillon、Dana A. Lichtenstein、Jeremy W. Pisor、Kristina D. Closser、Hubert Muchalski
DOI:10.1039/d0ob01538e
日期:——
Homogeneous cationic gold(I) catalysis emerged as a preferred avenue for the activation of alkenes and alkynes towards reactions with weak nucleophiles, especially in cyclization reactions. Here we report an intramolecular carboalkoxylation reaction of electron-rich benzyl ethers of 2-ethynylaryl phenols catalysed by a digold(I)–NHC complex. The reaction proceeds efficiently with low catalyst loading