Showing papers by "Takashi Hirota published in 1998"

Polycyclic N-heterocyclic compounds. Part 52.1 One-step syntheses of imidazo[1,5-a]pyridines, imidazo[1,5-a]quinolines and imidazo[5,1-a]isoquinolines by Vilsmeier reactions of pyridine-2-carbonitriles, quinoline-2-carbonitriles and isoquinoline-1-carbonitriles

Abstract: The versatile, one-step synthesis of imidazo[1,5-a]pyridines by the reaction of pyridine-2-carbonitriles with DMF under Vilsmeier conditions is described. This reaction was applied to the syntheses of imidazo[1,5-a]quinolines from quinoline-2-carbonitriles, and of imidazo[5,1-a]isoquinolines from isoquinoline-1-carbonitriles.