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Synthesis 1990; 1990(8): 704-706
DOI: 10.1055/s-1990-26989
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Synthesis of Various Pyrazolo[4′,3′ : 5,6]pyrano[3,2-e] [1,2,4]triazolo[1,5-c]pyrimidines and Pyrazolo[4″,3″ : 5′,6′]pyrano[2′,3′ : 4,5]pyrimido[1,6-b] [1,2,4]triazines

Mansour Ismail Younes* , Saoud Abdel Monem Metwally, Aly Hussein Atta
  • *Chemistry Department, Faculty of Science, Quena, Assiut University, Egypt
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Publication Date:
17 September 2002 (online)

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A number of heterocyclic compounds 5-13 were prepared by the reaction of 6-amino-1,4,5,6-tetrahydro-5-imino-3-methyl-1,4-diphenylpyrazolo [4′,3′:5,6]pyrano[2,3-d]pyrimidine (3) with ethyl 2-cyano-3-ethoxy-2-propenoate, ethoxymethylenemalononitrile, ethyl cyanoacetate, malononitrile, ethyl pyruvate, oxalyl chloride, ethyl chloroformate, and 3-methyl-4-nitroso-1-phenylpyrazol-5(4H)-one, respectively.