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New Product of Pyromellitic Anhydride Condensation with 1,2-phenylenediamine
1  Scientific-Research Phototechnical Institute - Slavich, Ltd., Mendeleev sq. 2, bldg. 39-a, Pereslavl-Zalesskiy, Yaroslavl region, 152020, Russian Federation

Abstract: During study of pyromellitic anhydride condensation with 1,2-phenylenediamine to bisbenzimidazole pigment new condensation product, di-2,3-(2-benzimidazolyl)-benz[4,5]imidazo[2,1-a]isoindol-11-one was obtained.
Keywords: Pyromellitic anhydride, 1,2-phenylenediamine, bisbenzimidazole pigment