Synthesis of Derivatives of 8-Cyano-6-ethoxycarbonyl-3-hydroxy-5-methylimidazo[1,2-a]pyridine and 9-Alkoxycarbonyl- (or 9-Carboxy)-3-ethoxycarbonyl-2-methyl-10H-benzo[b]-1,8-naphthyridine-5-one from the Reaction of 2-Chloro-5-ethoxycarbonyl-6-methylnicotinonitrile with Amino Acids
Synthesis of Derivatives of 8-Cyano-6-ethoxycarbonyl-3-hydroxy-5-methylimidazo[1,2-a]pyridine and 9-Alkoxycarbonyl- (or 9-Carboxy)-3-ethoxycarbonyl-2-methyl-10H-benzo[b]-1,8-naphthyridine-5-one from the Reaction of 2-Chloro-5-ethoxycarbonyl-6-methylnicotinonitrile with Amino Acids