反应详情

WSC (0.19 g) was added to a mixture of (2S)-3-[(6-chloronaphthalen-2-yl)sulfonyl]-2-hydroxypropionic acid (0.31 g), 1,4′-bipiperidin-2-one (0.18 g) and HOBt (0.15 g) in DMF (15 mL) and the mixture was stirred at room temperature for 15 hours. The reaction mixture was concentrated under reduced pressure, and diluted with dichloromethane and an aqueous sodium bicarbonate solution. The organic layer was separated, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (ethyl acetate to ethyl acetate/methanol=10/1) to obtain the title compound (0.26 g, 54%) as a colorless powder.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. additiondiluted with dichloromethane
3. customThe organic layer was separated
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by basic silica gel column chromatography (ethyl acetate to ethyl acetate/methanol=10/1)