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2 044 726

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C1

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IPC

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Application

92009289/04, 1992-12-02

(22)

Actual filing date

1992-12-02

(45)

Published

1995-09-27

(72)

Inventor

Rad'Ko L.V.Ivanova V.M.Taranova S.N.Dorogov M.V.Vulakh E.L.Bark D.S.

(73)

Holder

Aktsionernoe Obshchestvo I Proektnyj Institut Monomerov S Opytnym Zavodom"

PROCESS FOR PREPARING 4-NITRO-N-METHYPHTHALIMIDE Russian patent published in 1995 - IPC

Abstract RU 2044726 C1

FIELD: petrochemistry, more particularly a process for preparing 4-nitro-N-methylphthalimide. SUBSTANCE: the product: 4-nitro-N methylphthalimide, mp 178-179 C. Reagent 1: N-methylphthalimide. Reagent 2: concentrated nitric acid. Reaction conditions: nitric acid is added to a reagent 1 solution in concentrated sulfuric acid (the molar ratio is 1:(3.6-5.6) at 70 C for 3 hours followed by dilution of the reaction mixture with water to attain a concentration of sulfuric acid of 25-66% and recovery of the desired product by filtration. EFFECT: more efficient preparation process.

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RU 2 044 726 C1

Authors

Rad'Ko L.V.

Ivanova V.M.

Taranova S.N.

Dorogov M.V.

Vulakh E.L.

Bark D.S.

Dates

1995-09-27—Published

1992-12-02—Filed

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