α-phenylisocinchomeronic and 4-azafluorenone 3-carboxylic acids

3,6-Dimethyl-6-phenylpyridine, obtained on phenylation of 2,5-lutidine, has been used in the synthesis of α-phenylisocinchomeronic acid, derivatives of it, and also for the preparation of 4-azafluorenone 3-carboxylic acid. It was established that 4-hydroxy-3,6-dimethyl-2-phenylpyridine was formed on phenylation of 2,5-lutidine. © 1986 Plenum Publishing Corporation.