New Vilsmeier reaction for facile synthesis of 4-phenyl-2,4-dihydrochromeno[4,3-c]pyrazoles with bis(trichloromethyl) carbonate/DMF
作者:Zhiwei Chen、Yanyan Yang、Weike Su
DOI:10.3184/030823410x12888867039388
日期:2010.11
An efficient method for the synthesis of 4-phenyl-2,4- dihydrochromeno[4,3-c]pyrazoles via the cyclisation reaction of the easily available flavanone-4-arylhydrazones with Vilsmeier reagent (Bis(trichloromethyl) carbonate /DMF) has been developed.