Pyridine compounds, process for their preparation and systems containing them
申请人:STERLING DRUG INC.
公开号:EP0061128A1
公开(公告)日:1982-09-29
Novel 4-aryl- or heteroaryl-2,6-bis(heteroaryl) or [(substituted-amino) phenyl] pyridines which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting an aryl or heteroaryl methyl ketone with an aryl or heteroaryl aldehyde in the presence of ammonia or an ammonia-releasing agent.