PROCESS FOR THE HYDROLYSIS OF QUINOLONE CARBOXYLIC ESTERS

PROCESS FOR THE HYDROLYSIS OF QUINOLONE CARBOXYLIC ESTERS

Quinolone carboxylic esters of general formula (II) are hydrolyzed to form quinolone carboxylic acids of general formula (I): the method comprises the step A): A) reacting compounds of formula (II) with a mixture that comprises acetic acid, sulfuric acid and water. In step A), = 30 to = 40 mol aceti...

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Bibliographische Detailangaben
Hauptverfasser: BERWE, Mathias, DIETZEL, Antje, FEY, Peter, WIRTHS, J”rg, LONGERICH, Markus, WISCHNAT, Ralf
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:Quinolone carboxylic esters of general formula (II) are hydrolyzed to form quinolone carboxylic acids of general formula (I): the method comprises the step A): A) reacting compounds of formula (II) with a mixture that comprises acetic acid, sulfuric acid and water. In step A), = 30 to = 40 mol acetic acid, = 0.3 to = 1 mol sulfuric acid and = 0.9 to = 2.5 mol water are used per mol of compounds of formula (II). The process according to the invention is particularly suitable for the synthesis of the intermediate (I) in the synthesis of pradofloxacin.