2-[4-(2,6-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-4-methyl-pentanoic acid 、
1-[2-(t-butyl-dimethyl-silanyloxy)-ethyl]-1H-pyrazol-3-ylamine 以afforded 2-[4-(2,6-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-4-methyl-pentanoic acid {1-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-1H-pyrazol-3-yl}-amide as an off-white solid (1.15 g, 68%)的产率得到2-[4-(2,6-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-4-methyl-pentanoic acid {1-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-1H-pyrazol-3-yl}-amide