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2 027 701

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IPC

(21) (22)

Application

5020442/04, 1992-01-03

(22)

Actual filing date

1992-01-03

(45)

Published

1995-01-27

(72)

Inventor

Shchel'Tsyn V.K.Varnikova G.V.Vashchekina L.P.Volkova V.A.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa I Proektnyj Institut Monomerov S Opytnym Zavodom"

N,N'-BIS -(2,4- DIAMINOPHENYL) -AMIDES OF 4,4'- OR 4,4'-DIPHENYLOXIDE DICARBOXYLIC ACID AS AN INTERMEDIATE PRODUCTS FOR SYNTHESIS OF 4,4'-BIS- [5(6)- AMINOBENZIMIDAZOLYL -2]- DIPHENYL OR -DIPHENYLOXIDE Russian patent published in 1995 - IPC

Abstract RU 2027701 C1

FIELD: organic chemistry. SUBSTANCE: product: N,N'-diphenyloxide of dicarboxylic acid of the formula (I) where Z - simple bond or O; m. p. is 296-298 C and 266-267 C; yield is 92 and 94%. Reagent 1: N,N'-bis- (2,4-dinitrophenyl) -amide of 4,4'- diphenyl- or -4,4'- diphenyloxide of dicarboxylic acid. Reaction conditions: liquid-phase reduction with hydrogen under increased pressure and temperature on the palladium catalyst in the medium of amide solvent. Synthesized products were used as intermediate substances for synthesis of 4,4'-bis- [5(6)-aminobenzimidazolyl -2]-diphenyl or -diphenyloxide. EFFECT: improved method of synthesis. 1 tbl

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RU 2 027 701 C1

Authors

Shchel'Tsyn V.K.

Varnikova G.V.

Vashchekina L.P.

Volkova V.A.

Dates

1995-01-27—Published

1992-01-03—Filed