反应详情

1-Ethyl-3-[4-(trifluoromethoxy)phenyl]-1H-pyrazole-5-carbaldehyde (2.5 g) synthesized in Example 58(2) was dissolved in tetrahydrofuran (20 mL), and 1M isobutylmagnesium bromide tetrahydrofuran solution (12 mL) was added dropwise at 0° C. In the same manner as in Example 1(6), the title object compound (0.9 g, 31%) was obtained as an oil.