Gold-Catalyzed Conversion of Aryl- and Alkyl-Substituted 1-(<i>o</i>-Aminophenyl)-2-propyn-1-ones to the Corresponding 2-Substituted 4-Quinolones
作者:Otto Seppänen、Mikko Muuronen、Juho Helaja
DOI:10.1002/ejoc.201402224
日期:2014.7
Gold-catalyzed cyclization of alkyl- or aryl-substituted 1-(o-aminophenyl)-2-propyn-1-ones to the corresponding2-substituted 4-quinolones was studied with various gold salts and complexes. Screening of the different catalysts showed highest performance with cationic AuI species. In particular PPh3AuNTf2 complex was the most efficient catalyst. Relative to classic quinolone synthesis that requires harsh