反应详情

The new dyes of this invention are prepared by condensation of the new intermediates of Examples 1 and 2 in pyridine with an active methylene compound such as 3-cyano-4-phenyl-2-furanone, cyclopentanone, 4-dicyanomethylene-2,6-dimethyl-4H-pyran, 3-acetyl-7-(N,N-dialkylamino)coumarins and the like.