A One-Pot Method to Prepare 4,5-Benzotropones and 2,3,4,5-Dibenzotropones
作者:Zili Chen、Fang-Qin Li、Xiao-Yu Liu
DOI:10.1055/a-2011-6969
日期:2023.4
An extremely simple method is developed to prepare 4,5-benzotropones and 2,3,4,5-dibenzotropones via one-pot cycloaddition reactions of alkynes with naphthoquinones and dibenzoquinones mediated by BF3·Et2O. Various mono- and disubstituted phenylacetylenes, multisubstituted 1,2-naphthoquinones and dibenzoquinone substrates are investigated. In addition, a scale-up synthesis of 7-phenyl-5H-dibenzo[a