[N:1]1([CH:6]([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C:7]2[CH:12]=[CH:11][C:10]([NH2:13])=[C:9]([N+:14]([O-])=O)[CH:8]=2)[CH:5]=[CH:4][N:3]=[CH:2]1.S1C=CC=C1.N.[H][H]>CO.[Pt]>[N:1]1([CH:6]([C:17]2[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=2)[C:7]2[CH:8]=[C:9]([NH2:14])[C:10]([NH2:13])=[CH:11][CH:12]=2)[CH:5]=[CH:4][N:3]=[CH:2]1(a-3) A mixture of 3.4 parts of 4-[(1H-imidazol-1-yl)phenylmethyl]-2-nitrobenzenamine, 1 part of a solution of thiophene in methanol 4%, 80 parts of methanol and 80 parts of methanol saturated with ammonia was hydrogenated at normal pressure and at room temperature with 2 parts of platinum-on-charcoal catalyst 5%. After the calculated amount of hydrogen was taken up, the catalyst was filtered off and the filtrate was evaporated, yielding 2.64 parts (99%) of 4-[(1H-imidazol-1-yl)-phenylmethyl]-1,2-benzenediamine as a residue (int. 126), or alternatively
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