[I:1][C:2]1[CH:8]=[CH:7][C:5]([NH2:6])=[CH:4][CH:3]=1.[I:9][C:10]1[CH:11]=[C:12]2[C:17](=O)[O:16][C:14](=[O:15])[C:13]2=[CH:19][CH:20]=1.N1C=CC=CC=1.C(OC(=O)C)(=O)C>O.CC(N(C)C)=O>[I:1][C:2]1[CH:8]=[CH:7][C:5]([N:6]2[C:17](=[O:16])[C:12]3=[CH:11][C:10]([I:9])=[CH:20][CH:19]=[C:13]3[C:14]2=[O:15])=[CH:4][CH:3]=1##STR19## A 100 milliliter round-bottomed flask, equipped with stirrer, was charged with p-iodoaniline (10.95 grams, 0.05 mol) and dimethylacetamide (DMAc) (35 milliliters). 4-iodophthalic anhydride (13.6 grams, 0.05 mol) was added slowly over 10 minutes. The reaction mixture was heated with stirring to a temperature of about 70° C. Pyridine (19.45 grams, 0.25 mol) was added, the reaction mixture was stirred for 15 minutes, then acetic anhydride (11.12 grams, 0.11 mol) was added dropwise over 20 minutes. The reaction mixture was stirred at 70° C. overnight. The reaction mixture was poured into water, producing a white solid product, which was collected by filtration, triturated with methanol (300 milliliters) and dried under vacuum at 60° C. overnight. Melting point, as determined by DSC was 235° C. Combustion analysis was: calculated: C=35.40, H=1.49, N=2.95; measured: C=35.47, H=1.59, N=2.94. Proton NMR was consistent with the above general structure.
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