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Application

5043757/04, 1992-04-03

(22)

Actual filing date

1992-04-03

(45)

Published

1994-10-15

(72)

Inventor

Liakumovich A.G.Samuilov Ja.D.Budkin V.A.Starovojtov V.I.Gol'Dberg Ju.M.

(73)

Holder

Aktsionernoe Obshchestvo Zakrytogo Tipa Gruppa Vnedrenija"

METHOD OF SYNTHESIS OF ENDONORBORNENE-2,3-DICARBOXYLIC ACID ANHYDRIDE Russian patent published in 1994 - IPC

Abstract RU 2021267 C1

FIELD: organic chemistry. SUBSTANCE: product - anhydride of endonorbornene-2,3-dicarboxylic acid, m. p. is 163-164 C. Reagent 1: C5-fraction of medium- or high-temperature gasoline pyrolysis of the following composition, wt. -% : cyclopentadiene 10-20; pentanes 20-35; isoprene 10=20; piperylenes 13; olefins 10-35; C6-hydrocarbons and high-boiling products 2-20. Reagent 2: maleic anhydride. Reaction conditions: at 20-60 C, at addition of hydroquinone or p-tert.-butylpyrocabequine or 4-hydroxy-3,5-di-tert.-butylbenzyl taken at concentration 0.005-0.02 mole per 1 mole of maleic anhydride. EFFECT: improved method of synthesis. 1 tbl

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RU 2 021 267 C1

Authors

Liakumovich A.G.

Samuilov Ja.D.

Budkin V.A.

Starovojtov V.I.

Gol'Dberg Ju.M.

Dates

1994-10-15—Published

1992-04-03—Filed

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