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2 036 906

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C1

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IPC

(21) (22)

Application

92009391/04, 1992-12-02

(22)

Actual filing date

1992-12-02

(45)

Published

1995-06-09

(72)

Inventor

Seina Z.N.Ivanova V.M.Taranova S.N.Vulakh E.L.Bark D.S.

(73)

Holder

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

METHOD OF SYNTHESIS OF 2,2-BIS-[4-(3,4-DICARBOXYPHENOXY)-PHENYL]-PROPANE BIS-IMIDE Russian patent published in 1995 - IPC

Abstract RU 2036906 C1

FIELD: organic chemistry. SUBSTANCE: product: 2,2-bis-[4-(3,4-dicarboxyphenoxy)-phenyl] -propane bis-imide, m. p. is 151-152 C. Reagent 1: 4, 4′-diphenylolpropane disodium salt. Reagent 2: 4-nitro-N-phthalimide. Reaction conditions: 4,4′-diphenylolpropane disodium salt is dehydrated preliminary by its addition to aqueous solution of low-polar solvent and azeotropic water distiilation off in nitrogen atmosphere under pressure 5-10 atm and at temperature 140 C (not lower), yield is 93-97%. EFFECT: improved method of synthesis, increased yield of product.

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RU 2 036 906 C1

Authors

Seina Z.N.

Ivanova V.M.

Taranova S.N.

Vulakh E.L.

Bark D.S.

Dates

1995-06-09—Published

1992-12-02—Filed

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