2-bromo-3-chloro-1-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one 、
2-bromo-1-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]-pyridazin-4-one 、
2-(3-cyclobutoxy-4-methoxyphenyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane 、
2-(3-cyclopropoxy-4-difluoromethoxyphenyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane 以whereby 339 mg of the title compound was obtained as a pale yellowish solid的产率得到3-chloro-2-(3-cyclobutoxy-4-methoxyphenyl)-1-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one