4-{[(5-chloro-2-pyridinyl)methyl]oxy}-6'-(7-tert-butyloxycarbonyl-1-oxo-2,7-diazaspiro[3.5]nonan-2-yl)-2H-[1,3'-bipyridin]-2-one                                                                                                                                                              在
                                                                                                                                                                                 crude product                                                                                                                                  作用下,
                                                                                                                以
                                                                                         trifluoracetic acid-dichloromethane                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以to afford the title compound (5.37 mg, 32.8%)的产率得到4-{[(5-chloro-2-pyridinyl)methyl]oxy}-6'-(1-oxo-2,7-diazaspiro[3.5]nonan-2-yl)-2H-[1,3'-bipyridin]-2-one