2-carbomethoxy-4-hydroxy-7-methoxy-6-methylquinoline   、                                                                                                                                                                                                                                                    在
                                                                                                                                                                                 
caesium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N-甲基吡咯烷酮                                                                                  为溶剂,
                                                                                                                                                    反应 7.0h,
                                                                                                                以40%的产率得到methyl 4-[(3R,5S)-1-[(2S)-2-(cyclopentyloxycarbonylamino)-3,3-dimethylbutanoyl]-5-[[(1R,2S)-2-ethenyl-1-methoxycarbonylcyclopropyl]carbamoyl]pyrrolidin-3-yl]oxy-7-methoxy-6-methylquinoline-2-carboxylate