8-chloro-3-methyl-2-(tetrahydro-pyran-2-yl)-2,5-dihydro-pyrazolo[4,3-c]quinolin-4-one   、                                                                                      
t-butyl 2-(2-bromoethyl)piperidine-1-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 sodium hydride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         DMF (N,N-dimethyl-formamide)                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                以27%的产率得到2-{2-[8-chloro-3-methyl-4-oxo-2-(tetrahydro-pyran-2-yl)-2,4-dihydro-pyrazolo[4,3-c]quinolin-5-yl]-ethyl}-piperidine-1-carboxylic acid tert-butyl ester