摘要

Three-component one-pot synthesis of some novel 12-aryl-12H-[1,3]-dioxolo[4,5-b]benzo[i]xanthene-6,11-diones and 14-aryl-14H-dibenzo[a,i]xanthene-8,13-diones, from condensation of 3,4-methylenedioxyphenol or beta-naphthol, aldehydes and 2-hydroxy-1,4-naphthoquinone in the presence of Amberlyst-15 under solvent-free conditions at 120 degrees C is reported.