A FACILE AND CONVENIENT SYNTHESIS OF NOVEL PYRIDINE DERIVATIVES INCORPORATING ANTIPYRINE MOIETY AND INVESTIGATION OF THEIR ANTIMICROBIAL ACTIVITIES

[摘要]：A series of potentially bioactive piperidines and pyridines, pendant to antipyrine moiety, were synthesized and evaluated in vitro for their antimicrobial potential. Condensation of acetamide 1 with arylaldehydes in (2:1 molar ratio) gave hitherto unreported novel piperidine-3-carboxamide derivatives 4a-c. Also, reaction of acetamide 1 with ethyl 2-cyano-3-(4-nitrophenyl)acrylate afforded unexpected piperidine-3-carboxamide 4c. On the other hands, treatment of acetamide 1 with (arylmethylene)malononitriles 7a,b afforded pyridine-3,5-dicarbonitrile derivatives 10a,b. The structures of the synthesized products were confirmed by IR, H-1 NMR, C-13 NMR and mass spectral techniques.

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