InBr<sub>3</sub>-Promoted Divergent Approach to Polysubstituted Indoles and Quinolines from 2-Ethynylanilines: Switch from an Intramolecular Cyclization to an Intermolecular Dimerization by a Type of Terminal Substituent Group
Use of a 2-ethynylaniline having an alkyl or aryl group on the terminal alkyne selectively produced a variety of polyfunctionalized indole derivatives in moderate to excellent yields via indium-catalyzed intramolecular cyclization of the corresponding alkynylaniline. In contrast, employment of a substrate with a trimethylsilyl group or with no substituent group on the terminal triple bond, exclusively
Gold(III) Chloride Catalyzed Intermolecular Dimerization of 2-Ethynylanilines: Synthesis of Substituted Quinolines
作者:P. Perumal、C. Praveen、S. Jegatheesan
DOI:10.1055/s-0029-1217961
日期:2009.10
An unprecedented gold(III)-catalyzed intermolecular dimerization of 2-ethynylanilines possessing terminal triple bond offers a general synthetic pathway to a wide range of highly substituted quinolines.