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Efficient Catalytic Synthesis of Pyrazolo[3,4-d]pyrimidine, Pyrazolo[4,3- e][1,2,4]triazolo[1,5-c]pyrimidine, Pyrazolo[4,3-e][1,2,4]triazolo[1,5- c]pyrimidine, Pyrazolo[3,4-d]pyrimidin-4-one derivatives using Heterogeneous Preyssler Heteropolyacid, H14[NaP5W30O110]/SiO2
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1  Department of Chemistry, Islamic Azad University, Mashhad, Iran
2  Agricultural Researches and Services Center, Mashhad, Iran

Abstract: With of reaction of 5-amino-pyrazole-4-carbonitrile derivative and using from supported Preyssler heteropolyacid catalyst in a series from reactions prepared a several new pyrazolo[3,4-d]pyrimidine, pyrazolo[3,4-e][1,4]diazepine, pyrazolo[3,4- d][1,2,3]triazine and pyrolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine derivatives.
Keywords: Pyrazolo, pyrimidine, Supported, Preyssler, heteropolyacid, catalyst