反应详情

温度

80 °C

To a solution of 200 mg of the N-[2-(3,5-dichloropyridin-2-yl)-2-oxoethyl]-2-(trifluoromethyl)benzamide prepared in Step 1 in Synthetic Example 15 and 133 mg of methoxyamine hydrochloride in 2.7 ml of ethanol, 168 mg of pyridine was added, and the mixture was stirred at 80° C. for 6 hours. After completion of the reaction, the reaction mixture was mixed with 10 ml of water and extracted with ethyl acetate (10 ml×1), the resulting organic layer was washed with water (10 ml×1) and dried over saturated aqueous sodium chloride and then anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The resulting residue was purified by silica gel column chromatography using ethyl acetate-hexane (with a gradient of from 1:9 to 3:7) as the eluent to obtain 191 mg of the desired product as a pale yellow resinous substance.

1. customAfter completion of the reaction
2. extractionextracted with ethyl acetate (10 ml×1)
3. washthe resulting organic layer was washed with water (10 ml×1)
4. dry with materialdried over saturated aqueous sodium chloride
5. customanhydrous sodium sulfate, and the solvent was evaporated under reduced pressure
6. customThe resulting residue was purified by silica gel column chromatography