反应详情

2,2,2-Trifluoroethane-1-thiol (0.151 mL, 1.636 mmol) was added dropwise to a suspension of sodium hydride (60% dispersion in mineral oil, 0.065 g, 1.636 mmol) in anhydrous DMF (3 mL) at 0 C. A solution of tert-butyl 4-[(methanesulfonyloxy)methyl]piperidine-1-carboxylate (Intermediate 181, 0.320 g, 1.091 mmol) in DMF (4 mL) was then added dropwise and the reaction mixture was stirred at room temperature for 4 h. The mixture was diluted with EtOAc (30 mL) and washed with a saturated aqueous solution of sodium bicarbonate (10 mL) followed by brine (10 mL). The organic layer was dried over anhydrous sodium sulfate, filtered and evaporated under reduced pressure. The crude material was purified by FCC (EtOAc: heptane, 20:80) to provide the title compound as a colourless oil (0.288 g, 82%). Method B HPLC-MS: MH+ requires m/z=313 Found: m/z=257 (M minus tert-butyl), Rt=2.28 min (97%).

1. washwashed with a saturated aqueous solution of sodium bicarbonate (10 mL)
2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
3. filtrationfiltered
4. customevaporated under reduced pressure
5. customThe crude material was purified by FCC (EtOAc: heptane, 20:80)