Patent ID: 6897315
Filing Date: 2005-05-24
Classification: A01N,A61P,C07D

Abstract:
1. Process for preparing 3-quinolonecarboxylic acid derivatives of the general formula wherein R′ and R″ together with the linking nitrogen atom form a mono- or bicyclic heterocycle which may optionally contain in all ring moieties further nitrogen, oxygen or sulphur heteroatoms and which may optionally be substituted, wherein R R R comprising reacting 8-halogeno-3-quinolonecarboxylic acid derivatives of the general formula wherein Hal represents fluorine or chlorine and R  are each as defined above, in an aliphatic or cycloaliphatic ether having 4 to 6 carbon atoms as solvent in the presence of C wherein M represents sodium or potassium.