HClO4–SiO2-catalyzed synthesis of 12-aryl-12H-benzo[i][1,3]dioxolo[4,5-b]xanthene-6,11-diones and 10-aryl-6,7,8,10-tetrahydro-7,7-dimethyl-9H-[1,3]dioxolo[4,5-b]xanthen-9-ones
作者:Liqiang Wu、Yanfang Wu、Fulin Yan、Lizhen Fang
DOI:10.1007/s00706-010-0333-1
日期:2010.8
Three-component one-pot synthesis of some novel 12-aryl-12H-benzo[i][1,3]dioxolo[4,5-b]xanthene-6,11-diones involving treatment of 3,4-methylenedioxyphenol, aldehydes, and 2-hydroxy-1,4-naphthoquinone in presence of HClO4-SiO2 was achieved, and this reaction was extended to preparation of 10-aryl-6,7,8,10-tetrahydro-7,7-dimethyl-9H-[1,3]dioxolo[4,5-b]xanthen-9-ones by three-component reaction of 3,4-methylenedioxyphenol, aldehydes, and dimedone.