反应详情

tert-Butyl 4-hydroxypiperidine-1-carboxylate (3.0 g) was mixed with DCE (30 ml), and TEA (3.0 ml) and benzoyl chloride (2.4 g) was added thereto, followed by stirring at room temperature for 1 hour. A saturated aqueous sodium hydrogen carbonate solution and EtOAc were added to the reaction mixture, and the organic layer was dried over Na2SO4 and concentrated under reduced pressure. The obtained residue was mixed with DCE (30 ml), and TFA (10 ml) was added thereto, followed by stirring at room temperature for 5 hours. The reaction mixture was concentrated under reduced pressure, and then the residue was purified by basic silica gel column chromatography (CHCl3/MeOH) to obtain piperidin-4-yl benzoate (3.1 g).

1. additionwas added
2. dry with materialthe organic layer was dried over Na2SO4
3. concentrationconcentrated under reduced pressure
4. additionThe obtained residue was mixed with DCE (30 ml), and TFA (10 ml)
5. additionwas added
6. stirringby stirring at room temperature for 5 hours
7. concentrationThe reaction mixture was concentrated under reduced pressure
8. customthe residue was purified by basic silica gel column chromatography (CHCl3/MeOH)