1.
Alexandria Journal of Pharmaceutical Sciences. 1998; 12 (2): 91-94
in English
| IMEMR
| ID: emr-47460
ABSTRACT
Several new pyrazolopyridines VIa-c were synthesized by reacting 4-nitrosoantipyrine [IIa] with arylidenemalononitriles Ia-c or ethyl arylidenecyanoacetates If-h. Reaction of Ia-c with 4-[azidomethylcarbonyl] antipyrine [IIb] afforded the pyridine derivatives XVI. The 4H-pyrans and naphthodipyran derivatives XVIII- XXI were prepared by reacting I with polyhydric phenols