(S)-(4-(1-(4-(hydroxymethyl)phenyl)pyrido[3,4-d]pyridazin-4-yl)-2-methylpiperazin-1-yl)(piperidin-1-yl)methanone   、                                                                                      
三氯乙酰异氰酸酯                                                                                                                                                              在
                                                                                                                                                                                 alumina   、                                                                                                  
甲醇   、                                                                                                  
二氯甲烷                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
氯仿                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以to afford (S)-(4-(4-(3-methyl-4-(piperidine-1-carbonyl)piperazin-1-yl)pyrido[3,4-d]pyridazin-1-yl)phenyl)methyl carbamate 10的产率得到(S)-(4-(4-(3-methyl-4-(piperidine-1-carbonyl)piperazin-1-yl)pyrido[3,4-d]pyridazin-1-yl)phenyl)methyl carbamate