| Popis: |
Chemistry Department. Faculty of Science. Al-Azhar University, Nasr City, Cairo, Egypt Manuscript received 3 November 1994, revised 3 April 1995 accepted 31 May 1995 1,3-Diphenylpyrazol-5-one has been reacted with arylidenemalononitriles (la d) to afford pyrano[2,3-cipyrazoles (2a-d). Reaction of 2d with triethyl orthoformate gives compound 4 which on hydrazinolysis yields aminoiminopyrhnidine derivative (5) Interaction of diffeient carboxylic acid derivatives with compound 5 gives 2-substituted-1,2,4-triazolopyrimidine derivatives (6-11). |
