2-[4-(2,6-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-3-(2,6-difluoro-phenyl)-propionic acid 、
1-[2-(t-butyl-dimethyl-silanyloxy)-ethyl]-1H-pyrazol-3-ylamine 以afforded N-{1-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-1H-pyrazol-3-yl}-2-[4-(2,6-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-3-(2,6-difluoro-phenyl)-propionamide as a light yellow solid (690 mg, 65%)的产率得到N-{1-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-1H-pyrazol-3-yl}-2-[4-(2,6-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-3-(2,6-difluoro-phenyl)-propionamide