abstract |
Optionally substituted diphenylamines can be obtained by reacting optionally substituted anilines with optionally substituted cyclohexanones over a supported catalyst at 200 DEG -450 DEG C. and 0.1-20 bar, the supported catalyst containing one or more metals having a dehydrogenating action selected from the group Ru, Pd, Os, Ir, Pt, Fe, Co, Ni, Re, Mn, Cu, Ag, Cr and Ce. |