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2 027 698

(13)

(51)

IPC

(21) (22)

Application

4894062/04, 1990-12-13

(22)

Actual filing date

1990-12-13

(45)

Published

1995-01-27

(72)

Inventor

Karl Shermants[At]Manfred Sheftner[At]Ehngel'Bert Kloimshtajn[At]Jozef Shaller[At]Ehduard Perndorfer[At]Klaus Rajter[At]Rudol'F Nojkhofer[At]

(73)

Holder

Khemi Lints Gmbkh

METHOD OF SYNTHESIS OF α,ω-ALKANEDICARBOXYLIC ACIDS Russian patent published in 1995 - IPC

Abstract RU 2027698 C1

FIELD: organic chemistry. SUBSTANCE: improved method of synthesis of a, ω-alkanedicarboxylic acids of the formula: A-(COOH)₂ where A - C₆-C₁,-alkyl. Reagent 1: corresponding cycloalkyl. Reagent 2: ozone. Reaction conditions: reagent 1 is treated with reagent 2 in the medium of lower aliphatic alcohol at temperature from -80 to +20 C preparing peroxide solution at concentration in solution ≅ 0.1 mole peroxide following by removal of alcohol from the reaction mass, dissolving of dialdehyde obtained in the inert, nonpolar, aprotonic solvent (chlorobenzene) and oxidation at 50-100 C. Products were used as semiproducts used in pharmaceutical industry as lubricants. EFFECT: improved method of synthesis. 7 cl

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RU 2 027 698 C1

Authors

Karl Shermants[At]

Manfred Sheftner[At]

Ehngel'Bert Kloimshtajn[At]

Jozef Shaller[At]

Ehduard Perndorfer[At]

Klaus Rajter[At]

Rudol'F Nojkhofer[At]

Dates

1995-01-27—Published

1990-12-13—Filed