The method of 3,3'-or 3,4'-diamino benzophenone (diamino benzophenone)

摘要

3,3'- or 3,4'-Diamino benzophenone is prepd. for use as a monomer of heat-resisting polymer. 50.2 g of 4,4'-Dichloro benzophenone is dissolved into 100 ml of 1,2 dichloroethane, and 28.2g of nitric acid is added, and then 117 g of conc. sulfuric acid is added. by drops. This mixt. is stirred for 8 hrs at 70-80C, and an organic layer is separated and this is washed with water. THe precipitate of this is washed and dryed to give 3,3'dinitro-4,4'-dichlorobenzophenone.