Utility of hydrazonoyl halides as precursors for synthesis of novel antitumor pyrazolo [3,4-d] pyrimidine derivatives

Novel substituted pyrazolo[3,4-d]pyrimidine-4,6-dione [5a-j] have been prepared by reacting 1,3-dimethylbarbituric acid 1 with hydrazonoyl chloride [2a-j].The cytotoxicity [SRB assay using tumor cells] of compounds 5c,e against liver [HEPG2] and breast carcinoma [MCF7] cell lines revealed that 5c was more efficient than the standard drug [Doxorubicin]