Reaction   of 4,6-dimethyl    quinoline-2-carboxaldehyde  catalysed   by  potassium cyanide  results  in the formation of  an enediol (la).   On oxidation with   air 1,2-diketone (1b) was  obtained   which  upon  condensation with 4-methyl-phenylenediamine   formed  relevant 2,3-dihetaryl-4-methyl quinoxaline (le).


N ANSAR ,