7-[3-히드록시-(4-메틸티오 또는 4-메틸티오메틸)피롤리디닐] 퀴놀린-3-카르복실산의 합성과 항균작용

Synthesis and Antimicrobial Activity of 7-[3-Hydroxy-(4-methylthio or 4-methylthiomethyl)pyrrolidinyl]quinoline-3-carboxylic Acids

A number of 7-[3-hydroxy-(4-methylthio or 3-methylthiomethyl)pyrrolidinyllquinoline-3-carboxylic acids were synthesized by condensation of 7-fluoro substituted quinoline-3-carboxylic acid with 3-hydroxy-4-methylthiopyrrolidine or 3-hydroxy-4-methylthiomethylpyrrolidine. The in vitro antimicrobial activity of them were tested against twenty species of Gram-positive or Gram-negative microorganisms. It showed remarkable antibacterial activity, particularly against Gram-positive microorganisms. Among those 1-cyclopropyl-5-amino-6,8-difluoro 7-(3-hydroxy-4-methylthio methylpyrrolidinyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid(12d) and 1-cyclopropyl-6-fluoro-8-methoxy-7-(3-hydroxy-4-methylthiomethylpyrrolinyl)-l,4-dihydro-4-oxo-3-quinolinecarboxylic acid(l2g) showed the most potent in vitro antibacterial activity, and 12d showed better antibacterial activity against MRSA compared to ciprofloxacin and sparfloxacin.