A Direct Approach to 5-Hydroxybenzofurans via a Platinum-Catalyzed Domino Rearrangement/5-<i>endo</i>-<i>dig</i> Cyclization Reaction of Quinols
作者:Ikyon Kim、Kyungsun Kim、Jungeun Choi
DOI:10.1021/jo901937u
日期:2009.11.6
A highly efficient and atom-economical construction of 2-substituted 5-hydroxybenzofurans was accomplished by employing a platinum-catalyzed domino dienone-phenol rearrangement/5-endo-dig cyclization reaction of quinols bearing alkynes.
Gold-Catalyzed Synthesis of Tropone and Its Analogues via Oxidative Ring Expansion of Alkynyl Quinols
作者:Jidong Zhao、Jun Liu、Xin Xie、Shi Li、Yuanhong Liu
DOI:10.1021/acs.orglett.5b03160
日期:2015.12.4
convenient strategy for the synthesis of functionalized tropone derivatives based on the gold-catalyzedoxidativeringexpansion of alkynyl quinols has been developed. The reaction proceeds via gold-catalyzedhighly regioselective oxidation followed by 1,2-migration of a vinyl or phenyl group. Extension of this chemistry allows ready access to various seven- or six-membered ring systems such as benzotropones