Activated nitriles in heterocyclic synthesis. A novel synthesis of pyrazolo[1,5-a]pyrimidines and pyrano[2,3-c]pyrazoles |
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Authors: | Hassan Attia Elfahham Fathy Mohamed Abdel-Galil Yusria Rizk Ibraheim Mohamed Hilmy Elnagdi |
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Abstract: | Several new pyrazolo[1,5-a]pyrimidines and pyrano[2,3-c]pyrazoles were synthesized viathe reaction of the cinnamonitrile derivatives 1a-c with 5-amino-3-phenylpyrazole ( 1 ), 3-amino-2-pyrazolin-5-one ( 2 ) and 3-amino-1-phenyl-2-pyrazolin-5-one ( 22 ). |
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