反应详情

34.6 g (0.06 mol) of 2,2-bis-(4-anilino-3-nitrophenyl)-hexafluoropropane in 220 ml of ethanol are reduced with hydrogen under the catalytic action of 2 g of Pd-on-C (5% by weight in active charcoal) in a 500 ml chromium nickel steel autoclave. The crude product (30.7 g - pure according to H-NMR) is filtered off and recrystallized twice to give 15.1 g of analytically pure 2,2-bis-(3-amino-4-anilinophenyl) -hexafluoropropane (49% yield). The melting point is 177-178° C., and differs from the melting point given in the literature (120° C.).

1. filtrationThe crude product (30.7 g - pure according to H-NMR) is filtered off
2. customrecrystallized twice