反应详情

Imidazole (773 mg, 11.4 mmol) and tert-butyldimethylsilyl chloride (787 mg, 5.22 mmol) were added sequentially to a solution of (R)-6-hydroxymethyl-piperidin-2-one (prepared from D-□-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485-3496, 613 mg, 4.75 mmol) in DMF (8 mL) at 0° C. The reaction mixture was allowed to warm to rt and was stirred at rt for 20 h. Benzene and EtOAc (3:7, 200 mL) was added and the solution was washed with brine (3×50 mL). The organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient) afforded 1.13 g (98%) of (R)-6-(tert-butyldimethylsilanyloxymethyl)-piperidin-2-one as a white solid.

1. washthe solution was washed with brine (3×50 mL)
2. dry with materialThe organic phase was dried (Na2SO4)
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customPurification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient)