Method for preparing quinoline carboxylic acids and...

Details Method for preparing quinoline carboxylic acids and... Method for preparing quinoline carboxylic acids and...

C - Chemistry, Metallurgy

07

D

C07D 215/48 (2006.01) C07D 215/56 (2006.01) C07D 471/06 (2006.01) C07D 498/06 (2006.01) C07D 513/06 (2006.01)

Patent

CA 2156171

A method of preparing substituted and unsubstituted 1,4-dihydro-4-oxo-2 and -3 quinolinic carboxylic acids which comprises heating an ester selected from the group consisting of substituted and unsubstituted anilinomethylenemalonates, anilinofumurates, anilinomaleates and mixtures thereof in the presence of chlorosulfonic acid, oleum and mixtures thereof.

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