3,3'- or 3,4'-diamino benzophenone is prepared by catalytically reducing and dehalogenating, in the presence of a reduction catalyst and a dehydrohalogenation agent, a benzophenone compound or benzophenone compounds of the general formula ##STR1## in which X is a halogen atom at position 2 or 4 of the benzene ring and Y is hydrogen or a halogen atom and in which the nitro group is at position 3' or 4' of the benzene ring if Y is hydrogen, while Y is at position 4' and the nitro group is at position 3' of the benzene ring if Y is a halogen atom.
3,3'-或3,4'-二
氨基
二苯甲酮是通过在还原催化剂和脱卤代理的存在下,催化还原和脱卤苯甲酮化合物或苯甲酮化合物的制备通式为##STR1##在其中X是苯环上2或4位置的卤素原子,Y是氢或卤素原子,如果Y是氢,则硝基基团位于苯环上的3'或4'位置,而如果Y是卤素原子,则Y位于苯环上的4'位置,硝基基团位于苯环上的3'位置。