1-cyclopropyl-1,4-dihydro-6,7-difluoro-8-methoxy-4-oxo-quinoline-3-carboxylic acid difluoroborate ester 、
((3R,4S)-4-Trifluoromethyl-pyrrolidin-3-yl)-methanol 在
三乙胺 作用下,
以
二甲基亚砜 为溶剂,
生成 1-Cyclopropyl-6-fluoro-7-((3R,4S)-3-hydroxymethyl-4-trifluoromethyl-pyrrolidin-1-yl)-8-methoxy-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid