Process for producing quinoline-3-carboxylic acid compound

Details Process for producing quinoline-3-carboxylic acid compound Process for producing quinoline-3-carboxylic acid compound

2005-02-08

2005-02-08

McKane, Joseph K. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S170000, C514S311000

Reexamination Certificate

active

06852862

ABSTRACT:
A process for producing quinoline-3-carboxylic acid represented by formulawherein R1, R2, R3, R4and R5have the same meanings as defined below, characterized by reacting 2-aminophenyl ketone represented by formula (1)wherein R1is an aryl group, a C1-12alkyl group which may be branched, etc., and R2and R3are each a hydrogen atom, a halogen atom, a C1-12alkyl group which may be branched, etc., with a keto ester represented by formula (2)in-line-formulae description="In-line Formulae" end="lead"?R4COCH2CO2R5  (2)in-line-formulae description="In-line Formulae" end="tail"?wherein R4is a C1-12alkyl group which may be branched, a C3-6cycloalkyl group, etc., and R5is a C1-6alkyl group which may be branched,in the presence of an acid catalyst in an alcohol solvent while distilling off the alcohol.

REFERENCES:
patent: 5223513 (1993-06-01), Meguro et al.

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