Synthesis and Oxidative Transformations of 5,7-Bis(4-methoxyphenyl)-1,2,3,4,4a,5-hexahydro-13H-benzimidazo[2,1-j]quinoline

The reaction of 4,4′-dimethoxychalcone with cyclohexanone gave 1,5-diketone which was con­densed with o-phenylenediamine to produce 5,7-bis(4-methoxyphenyl)-1,2,3,4,4a,5-hexahydro-13H-benzimid­azo[2,1-j]quinoline. The oxidation and oxidative coupling of the latter with some primary amines and benzoylacetonitrile afforded fused heterocyclic p-quinoid compounds.