FIELD: chemistry.
SUBSTANCE: invention relates to field of organic chemistry and deals with method of obtaining 5(6)-amino-2-(4-aminophenyl)benximidazole, including catalytic hydration of 2',4,4'-trinitrobenzanylide in medium of amide solvent, separation of formed 2',4,4'-triaminobenzanylide from hydrogenisate in form of salt of mineral acid, cyclodehydration of 2',4,4'-triaminobenzanylide salt in mineral acid medium, separation of formed 5(6)-amino-2-(4-aminophenyl)benximidazole in form of mineral acid salt with further purification of 5(6)-amino-2-(4-aminophenyl)benximidazole salt in water solution with activated coal and neutralization with base, characterised by the fact that 2',4,4'-triaminobenzanylide is separated from hydrogenisate in form of trihydrochloride in presence of lower aliphatic alcohol or acetone.
EFFECT: elaborated is novel method of obtaining 5(6)-amino-2-(4-aminophenyl)benximidazole, characterised by high productivity and reduction of energy consumption for amide solvent regeneration.
2 cl, 4 tbl, 6 ex
| Title | Year | Author | Number |
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| METHOD OF SYNTHESIS OF 2′,4′,4-TRIAMINOBENZANILIDE | 1992 |
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