3-Methyl-9-benzylidene-2-azafluorene and its analogs

The possibility of obtaining 3-methyl-2-azafluorene by dehydrocyclization of 2,5-dimethyl-4-phenylpyridine at 500-750° in the absence of a catalyst was examined. This azafluorene was condensed with aromatic aldehydes. Several transformations of the geometrical isomers of 3-methyl-9-benzylidene-2-azafluorene and its analogs were studied. © 1974 Consultants Bureau, a division of Plenum Publishing Corporation.