tert-Butyl 4-{[3-(3-oxo-2-isopropyl-2,3-dihydropyridazin-6-yl)-2-phenylpyrazolo[1,5-a]pyridin-5-yl]oxy}-1-piperidinecarboxylate   、                                                                                      ethyl acetate hydrochloride                                                                                                                                                              在
                                                                                                                                                                                 resultant precipitate   、                                                                                                  
乙酸乙酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙酸乙酯                                                                                  为溶剂,
                                                                                                                                                    反应 17.5h,
                                                                                                                以to give 5-(4-Piperidinyloxy)-3-(3-oxo-2-isopropyl-2,3-dihydropyridazin-6-yl)-2-phenylpyrazolo [1,5-a]pyridine hydrochloride (1.06 g)的产率得到5-(4-piperidinyloxy)-3-(3-oxo-2-isopropyl-2,3-dihydropyridazin-6-yl)-2-phenylpyrazolo[1,5-a]pyridine hydrochloride