(2R,4R)-3-(3-aminopropyl)-2-[(4R)-2-(2-hydroxyphenyl)-4,5-dihydro-1,3-thiazol-4-yl]-1,3-thiazolidine-4-carboxylic acid   、                                                                                      
1-Cyclopropyl-6-fluoro-4-oxo-7-[4-[[4-oxo-4-(2,3,4,5,6-pentafluorophenoxy)butanoyl]oxymethoxycarbonyl]piperazin-1-yl]quinoline-3-carboxylic acid                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以39%的产率得到(4R)-3-[3-[[4-[[4-(3-carboxy-1-cyclopropyl-6-fluoro-4-oxoquinolin-7-yl)piperazine-1-carbonyl]oxymethoxy]-4-oxobutanoyl]amino]propyl]-2-[(4R)-2-(2-hydroxyphenyl)-4,5-dihydro-1,3-thiazol-4-yl]-1,3-thiazolidine-4-carboxylic acid