[NH2:1][C:2]1[CH:3]=[C:4]([C:16](=[O:18])[CH3:17])[CH:5]=[CH:6][C:7]=1[NH:8][C:9]1[CH:14]=[CH:13][CH:12]=[C:11]([Br:15])[CH:10]=1.[CH:19](OCC)(OCC)OCC.C1(C)C=CC(S(O)(=O)=O)=CC=1>C1COCC1>[Br:15][C:11]1[CH:10]=[C:9]([N:8]2[C:7]3[CH:6]=[CH:5][C:4]([C:16](=[O:18])[CH3:17])=[CH:3][C:2]=3[N:1]=[CH:19]2)[CH:14]=[CH:13][CH:12]=1This was prepared from 1-[3-amino-4-(3-bromo-phenylamino)-phenyl]-ethanone (86.5 g, 0.28 mol) by treatment with triethyl orthoformate in THF in the presence of p-toluenesulfonic acid as described in Example 1.
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