METHOD FOR PREPARING 6-FLUORO-7-CHLORO-1,4-DIHYDRO-4-OXO-3-QUINOLINE CARBOXYLIC ACID ETHYL ESTER Russian patent published in 2003 - IPC

Abstract RU 2206564 C1

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to method for preparing 6-fluoro-7-chloro-1,4-dihydro-4-oxo-3-quinoline carboxylic acid ethyl ester that involves cyclization reaction of 3-chloro-4-fluoroanilinomethylene malonic acid diethyl ester in the presence of summer diesel fuel as a solvent at temperature 230-245 C. The end compound is an intermediate product used in synthesis of veterinary preparations exhibiting an anti-infectious effect. EFFECT: simplified technological process, enhanced economical effectiveness. 3 dwg, 1 tbl

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RU 2 206 564 C1

Authors

Maslennikov E.I.

Strunin B.P.

Kalashnik V.N.

Gusejnov F.I.

Khaev E.A.

Kovalev V.G.

Dates

2003-06-20—Published

2002-03-07—Filed