Catalytic Method for Synthesis of Benzopyrano[3,2-c]chromene-6,8-dione Derivatives by Heteropoly Acids
作者:Radineh Motamedi、Saeede Baghbani、Fatemeh F. Bamoharram
DOI:10.1080/00397911.2010.542536
日期:2012.6
Benzopyrano[3,2-c]chromene-6,8-dione derivatives were prepared by a three-component one-pot cyclocondensation of 4-hyroxycoumarin, aldehydes, and 1,3, cyclohexadione using a catalytic amount of heteropolyacids in boiling ethanol in very good yields and rates.