محبوبه زاهدی فر

A simple one-pot and effective method is pronounced for the synthesis of 7-hydroxy-6-phenyl-3- (aryldiazenyl)pyrazolo[1,5-a]pyrimidine-2,5(1H,4H)-dione derivatives 3 via the 1,3- binucleophilic reaction of (chlorocarbonyl)phenyl ketene 2 with 5-aminopyrazole-3-ones 1. This method proposals a simple and suitable route to the synthesis of pyrazolo[1,5-a]pyrimidine derivatives 3 in good to excellent yield in a short reaction times.