Sulfuric acid promoted condensation cyclization of 2-(2-(trimethylsilyl) ethynyl)anilines with arylaldehydes in alcoholic solvents: an efficient one-pot synthesis of 4-alkoxy-2-arylquinolines

An efficient method for the synthesis of 4-alkoxy-2-arylquinolines has been developed. The reaction proceeds smoothly by heating a mixture of easily accessible 2-(2-(trimethylsilyl) ethynyl)anilines and arylaldehydes in alcoholic solvents in the presence of sulfuric acid.