Tert-butyl 3-(2,2-dimethylpropanoyl)-4-oxo-piperidine-1-carboxylate   、                                                                                      
一水合肼                                                                                                                                                                                              以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 5.0h,
                                                                                                                以to afford tert-butyl-3-tert-butyl-1,4,6,7-tetrahydropyrazolo[4,3-c]pyridine-5-carboxylate (300.00 mg, 1.07 mmol, 25.39% yield) as white solid的产率得到tert-butyl 3-tert-butyl-1,4,6,7-tetrahydropyrazolo[4,3-c]pyridine-5-carboxylate