METHOD OF PREPARING SUBSTITUTED OR UNSUBSTITUTED 1,4- DEHYDRO-4-OXO-2-OR 3-QUINOLINOCARBOXYLIC ACIDS Russian patent published in 1998 - IPC

Abstract RU 2104271 C1

FIELD: chemical industry. SUBSTANCE: present invention describes method of preparing substituted 1,4-dihydro-4- oxo-2 and 3-quinolino-carboxylic acid. The claimed method comprises heating ester selected from group consisting of substituted or unsubstituted aniline methylene malonates, aniline fumarates, aniline maleates and mixture thereof in the presence of chlorosulfonic acid, oleum and mixture thereof. EFFECT: more efficient preparation method. 20 cl, 1 tbl

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RU 2 104 271 C1

Authors

Dzhon K.Sokejtis[Us]

Franklin B.Gapton[Us]

Dates

1998-02-10Published

1994-02-14Filed