9-Acyl- and 9-aroyl-3-methyl-2-azafluorenes

The condensation of 3-methyl-2-azafluorene with esters of aromatic and aliphatic acids has given 9-aroyl and 9-acyl derivatives of 2-azafluorene. They are stable in the enolic form. The 9-benzoyl derivative (II) has also been isolated in the oxo form. The transition from (II) to the cis-trans isomers of 9-benzylidene-3-methyl-2-azafluorene has been effected. © 1975 Plenum Publishing Corporation.