New and Facile Synthesis of Substituted Pyrrole, Pyridine, Pyrazolo[4,3-b] Pyridine, Pyrano[3,2-c] Quinoline, Napthopyran, Naphthodipyran and Coumarin Derivatives
Several new pyrazolo[4,3-b] pyridines 7a,b were prepared by reacting arylidenemalononitriles 1a,c or 1i,j with 4-nitrosoantipyrine 4.Reacting 1a,b,dwith 4-azidomethylcarbonylantipyrine 8 give 2-aminopyrrole 14. Pyrano[3,2-c]
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