(S)-6-(3-((2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)-2-methylimidazo[1,2-b]pyridazine-3-carboxylic acid   、                                                                                      
2-氨基吡啶   、                                                                                      
O-(7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate   、                                                                                         、                                                                                      
N-(6-(morpholinomethyl)pyridin-2-yl)-6-(2-(trifluoromethyl)phenyl)imidazo[1,2-b]pyridazine-3-carboxamide                                                                                                                                                                                                                                                                                                          以to afford (S)-6-(3-((2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)-2-methyl-N-(pyridin-2-yl)imidazo[1,2-b]pyridazine-3-carboxamide (50.0 mg, 43%)的产率得到(S)-6-(3-((2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)-2-methyl-N-(pyridin-2-yl)imidazo[1,2-b]pyridazine-3-carboxamide