(S)-ethyl 6-bromo-1-(1-(2-(diethylamino)ethyl)piperidin-3-yl)-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate   、                                                                                      
联硼酸频那醇酯                                                                                                                                                              在
                                                                                                                                         bis-triphenylphosphine-palladium(II) chloride                                                                                                                                                                                                                               
potassium acetate   、                                                                                                  
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,4-二氧六环                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以80%的产率得到(S)-8-(1-(2-(diethylamino)ethyl)piperidin-3-yl)-6-(ethoxycarbonyl)-5-oxo-5,8-dihydro-1,8-naphthyridin-3-ylboronic acid