Investigations on furopyridines. 10. Synthesis of 4-N-substituted 1H-furo[3,4]pyridin-3-ones

2-Amino or 2-hydrazino derivatives of pyridine or pyridinopyrazole were obtained by amination or hydrazination of 2-chloro-3-cyano-4-methoxy-6-methylpyridine. Acid hydrolysis of these derivatives leads to heterocyclization with formation of 4-amino-1H-furo3,4-c]pyridines or pyrazolo3,4-b]pyridine. The possibility to synthesize 4-arylamino-1H-furo3,4-c]-pyridines from 4-chloro-6-methyl-1H-furo3,4-c]-pyridine has been shown.V. S. Pustovoit All-Russian Oil-Bearing Crops Research Institute, Krasnodar 350038, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 61–66, January, 1999.