1-(tertbutyloxycarbonylaminomethyl)-2-oxa-7-aza-bicyclo[3.3.0]-octane 、 6,7-Difluoro-9-cyclopropyl-2,3,4,9-tetrahydroisothiazolo<5,4-b>quinoline-3,4-dione 以
吡啶 、
水 为溶剂,
生成 7-(1-tert-butoxycarbonylaminomethyl-2-oxa-7-aza-bicyclo[3.3.0]oct-7-yl)-9-cyclopropyl-6-fluoro-2,3,4,9-tetrahydroisothiazolo[5,4-b]quinoline-3,4-dione