反应详情

To 214 mg of the N-[2-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-2-oxoethyl]phthalimide prepared in Step 2 in Synthetic Example 6 in 3 ml of ethanol, 84 mg of ethoxyamine hydrochloride was added, and the mixture was stirred at room temperature for 18 hours. After completion of the reaction, the reaction mixture was mixed with 5 ml of water and extracted with ethyl acetate (5 ml×3), and the resulting organic layers were combined, 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 preparative medium pressure liquid chromatography (preparative medium pressure chromatograph: YFLC-Wprep manufactured by Yamazen Science, Inc.) using ethyl acetate-hexane (with a gradient of from 2:18 to 5:15) as the eluent to obtain 111 mg of the desired product as a brown resinous substance.

1. customAfter completion of the reaction
2. extractionextracted with ethyl acetate (5 ml×3)
3. dry with materialdried over saturated aqueous sodium chloride
4. customanhydrous sodium sulfate, and the solvent was evaporated under reduced pressure
5. customThe resulting residue was purified by preparative medium pressure liquid chromatography (preparative medium pressure chromatograph: YFLC-Wprep manufactured by Yamazen Science, Inc.)