[CH:1]([C:4]1[CH:10]=[C:9](C(C)C)[CH:8]=[CH:7][C:5]=1[NH2:6])([CH3:3])[CH3:2].C(C1C=CC(C(C)C)=CC=1N)(C)C>>[CH:1]([C:4]1[CH:10]=[CH:9][CH:8]=[CH:7][C:5]=1[NH2:6])([CH3:3])[CH3:2]If the procedure described above is used, but replacing the 2,4-diisopropylaniline by the same amount of 2,5-diisopropylaniline or by 99 parts of 2-isopropylaniline, perylenetetracarboxylic acid N,N'-bis-(2',5'-diisopropylanilide) and N,N'-bis-(2'-isopropylanilide), respectively, are obtained in very good yield.
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