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Pyrazoles as Building Blocks in Heterocyclic Synthesis: Synthesis of Pyrazolo [3,4-rfjpyrimidine, Pyrazolo[3,4-e][l,4]diazepine, Pyrazolo [3,4-rf][l,2,3]triazine and Pyrolo -£] [l,2,4]triazolo[l,5-c]pyrimidine Derivatives

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Several new pyrazolol3,4-J]pyrimidine, pyrazolol3,4-e][l,4]diazepine, pyrazolo[3,4-

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