反应详情

To a mixture of 1-[2-[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl]-4-piperidinecarbothioamide (i.e. the product of Example 1, Step C) (20 g, 59.9 mmol) in isopropyl alcohol (90 mL) was added 1,3-dichloroacetone (8.99 g, 71.3 mmol) and the reaction mixture heated at 65 for 1.5 h. After cooling, a solution of sodium carbonate (7.39 g, 70.0 mmol) in water (92 mL) was added dropwise. After 2 h additional water (31 mL) was added and the resulting precipitate rinsed with water (62 mL). Drying overnight under reduced pressure at 45° C. provided 18.24 g of the title compound as a light gray solid.

1. temperaturethe reaction mixture heated at 65 for 1.5 h
2. temperatureAfter cooling
3. washthe resulting precipitate rinsed with water (62 mL)
4. customDrying overnight under reduced pressure at 45° C.