Studies on Pyrionecarboxylic Acids. IV. Synthesis and Antibacterial Activity Evaluation of S-(-)- and R-(+)-6-Fluoro-1-methyl-4-oxo-7-(1-piperazinyl)-4H-(1,3)thiazeto(3,2-a)quinoline-3-carboxylic Acids.
thiazeto [3,2-alpha] quinoline-3- carboxylic acid (NM394, 3) were prepared through optical resolution of their racemic intermediate ( +/- )-1 by high-performance liquid chromatography (HPLC). The absolute configuration at the C-1 position in the thiazeto-quinolone ring of ( - )-3 was confirmed by X-ray analysis ( - )-4 to be S. The in vitro antibacterialactivity of ( - )-3 was 2--8 times that of (+)-3
OPTICALLY ACTIVE COMPOUND OF PRULIFLOXACIN FOR TREATING INFECTION AND PREPARATION METHOD THEREOF
申请人:Ying Jun
公开号:US20120302580A1
公开(公告)日:2012-11-29
Anti-infection levorotatory optically active compound (S-configuration) of prulifloxacin represented by the following formula (1) and preparation method thereof are disclosed. Said method utilizes levorotatory ulifloxacin as the raw material and the reaction is conducted in organic solvent in the presence of alkaline materials, wherein the reaction temperature is −20° C.˜60° C. and the reaction time is 15 minutes to 24 hours.