反应详情

To a suspension of 1.80 g of the N-[2-(5-bromo-3-chloropyridin-2-yl)-2-(hydroxyimino)ethyl]-2-(trifluoromethyl)benzamide prepared in Step 3 in Synthetic Example 20 and 0.86 g of potassium carbonate in 10 ml of N,N-dimethylformamide, 1.30 g of 2-iodopropane was added, and the mixture was stirred at room temperature for 13 hours. After completion of the reaction, the reaction mixture was mixed with 100 ml of water and extracted with ethyl acetate (50 ml×2), the resulting organic layers were combined, washed with water (100 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 1:4 to 2:2) as the eluent to obtain 1.26 g of the desired product as a pale yellow resinous substance.

1. additionwas added
2. customAfter completion of the reaction
3. extractionextracted with ethyl acetate (50 ml×2)
4. washwashed with water (100 ml×1)
5. dry with materialdried over saturated aqueous sodium chloride
6. customanhydrous sodium sulfate, and the solvent was evaporated under reduced pressure
7. customThe resulting residue was purified by silica gel column chromatography