TITLE:
New and Facile Synthesis of Substituted Pyrrole, Pyridine, Pyrazolo[4,3-b] Pyridine, Pyrano[3,2-c] Quinoline, Napthopyran, Naphthodipyran and Coumarin Derivatives
AUTHORS:
F. M. A. El-Taweel, A. A. Elagamey
KEYWORDS:
Pyrrole; Pyridine; Pyrazolo[4, 3-b] Pyridine; Pyrano[3, 2-c] Quinoline; Naphthopyran; Naphthodipyrans and Coumarin
JOURNAL NAME:
International Journal of Organic Chemistry,
Vol.3 No.1,
March
27,
2013
ABSTRACT: 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, d with 4-azidomethylcarbonylantipyrine 8 give 2-aminopyrrole 14. Pyrano[3,2-c] quinolines 20a, b and 23 were obtained by reacting 4-hydroxyquinoline 15 with 1g, h, 2b respectively. Reaction of 1 with naphthalenediols 24, 27 and 29 yield naphthodipyrans 26a, b, 28a, b and 30a,