REACTIONS ON THE DIMETHYLPHENYLBENZACRIDINONES .6. HYDROGENATION OF ORTHO-NITROPHENYL DERIVATIVES

Catalytic hydrogenation of o-nitrophenylbenz[a], benz[c], dibenz[a,h] and dibenz[a,g]acridinones using Pd/C as catalyst, at 60 psi of pressu re, gave the hiterto unknown benzoquinoacridine N-oxides and benzopyra nonaphthyridine N-oxides. The structure of all products was corroborat ed by ir, H-1- and C-13-nmr and mass spectra data.