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Molecules 1998, 3(3), 71-79; doi:10.3390/30300071

Synthesis of Novel Fused Heterocycles Based on Pyrano[2,3-c]pyrazole

National Research Centre, Dokki, Cairo, Egypt
Received: 30 October 1997 / Accepted: 18 January 1998 / Published: 23 February 1998
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3-Substituted 1,2,4-triazole derivatives (5, 9, 13, 16b, 19), pyrimidinium salts (21), triazines (24), and aryl methylene hydrazono pyrazolopyrano-pyrimidine (27a,b) which are rearranged in basic medium to 30a,b, were afforded via the reaction of 6-amino 1,4,5,6-tetrahydro-5-imino-3-methyl-1-phenyl-4 (pchlorophenyl) pyrazolo [4', 3' : 5,6]-pyrano [2,3-d] pyrimidine (3) with different reagents.
Keywords: Condensed pyrazoles; cyclocondensation; Dimorth rearrangement Condensed pyrazoles; cyclocondensation; Dimorth rearrangement
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Zaki, M.E.A. Synthesis of Novel Fused Heterocycles Based on Pyrano[2,3-c]pyrazole. Molecules 1998, 3, 71-79.

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