Di- and trimethyl-substituted 2-azafluorenes and dibasic acids of 2-azafluorenone

Dehydrocyclization of the corresponding 2,5-dimethyl-4-arylpyridines gave 3,5- and 3,8-dimethyl- and 3,5,7- and 3,5,8-trimethyl-2-azafluorenones. Dibasic acids of 2-azafluorenone were obtained from γ-carboxyarylcinchomeronic acid. © 1974 Consultants Bureau, a division of Plenum Publishing Corporation.