PROCESS FOR PRODUCING 5-AMINO-8- ALKYLQUINOLO NECARBOXYLIC ACID DERIVATIVES AND INTERMEDIATES IN THE PRODUCTION THEREOF

摘要

The present invention provides a process for producing intermediates of antibacterial agents in accordance with the following steps and intermediates in the production thereof. <CHEM> (wherein R<1>: hydrogen atom or nitro group; R<2>: an alkyl group having 1 to 6 carbon atoms; R<3>, R<4>: an alkyl group having 1 to 6 carbon atoms or may form a 5-membered or 6-membered cyclic structure in combination with the nitrogen atom to which they are bonded, and the cyclic structure may contain oxygen atom, nitrogen atom, sulfinyl group, or sulfonyl group as a ring-constituting element; R<6>: a halogenocycloalkyl group having 3 to 6 carbon atoms; X<1> represents a halogen atom or hydrogen atom; X<2>, X<3>: a leaving group; and Y: an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms)