Friedländer condensation of 1H??pyrazolin??5??ones with O??aminobenzaldehydes. Synthesis of 1H??pyrazolo [3, 4??B] quinolines

…, P Tomasik, RA Abramovitch

Index: Tomasik, Danuta; Tomasik, Piotr; Abramovitch, Rudolph A. Journal of Heterocyclic Chemistry, 1983 , vol. 20, p. 1539 - 1543

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Citation Number: 43

Abstract

Abstract All the possible 1-and 3-monomethyl, monophenyl, dimethyl, diphenyl, and methylphenyl-1H-pyrazolin-5-ones have been condensed with o-aminobenzaldehyde. In some cases (but not all) 1-H-pyrazolo [3, 4-b] quinolines (10) are formed together with a variety of other products. The balance between formation of hydrazone 11 and the ring- closed 10 is discussed, as is the formation of other products obtained in these ...