PROCESS FOR THE PREPARATION OF 6-(3-CHLORO-2-FLUOROBENZYL)-1-[(2S)-1-HYDROXY-3-METHYLBUTAN-2-YL]-7-METHOXY-4-OXO-1,4-DIHYDROQUINOLINE-3-CARBOXYLIC ACID AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF

摘要

The present invention relates to a process for the preparation of 6-(3-chloro-2-fluorobenzyl)-1-[(2S)-1-hydroxy-3-methylbutan-2-yl]-7-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid represented by the following structural formula-1 and pharmaceutically acceptable salts thereof.