反应详情

To a solution of 2-[4-[(2-chloro-4,4-difluoro-spiro[5H-thieno[2,3-c]pyran-7,4′-piperidine]-1′-yl)methyl]-3-methyl-pyrazol-1-yl]pyridine-3-carbaldehyde (12.50 g, 26.10 mmol) in dichloromethane (125 mL) at 0° C. is added sodium borohydride (0.395 g, 10.44 mmol) and methanol (37.50 mL). The ice bath is removed and the reaction is stirred at room temperature for 30 min. Water (50 mL) is added and the mixture is concentrated to half volume resulting in a white sticky solid precipitate. Dichloromethane (100 mL) is added and the biphasic mixture is separated. The organic layer is washed with water (50 mL), dried over sodium sulfate and concentrated to half volume (around 100 mL). Methyl tert-butyl ether (100 mL) is added and the solution is concentrated to provide a precipitate. The solid is filtered and dried under vacuum to give 12 g of [2-[4-[(2-chloro-4,4-difluoro-spiro[5H-thieno[2,3-c]pyran-7,4′-piperidine]-1′-yl)methyl]-3-methyl-pyrazol-1-yl]-3-pyridyl]methanol. MS (m/z): 481 (M+1).

1. customThe ice bath is removed
2. additionWater (50 mL) is added
3. concentrationthe mixture is concentrated to half volume
4. customresulting in a white sticky solid precipitate
5. customthe biphasic mixture is separated
6. washThe organic layer is washed with water (50 mL)
7. dry with materialdried over sodium sulfate
8. concentrationconcentrated to half volume (around 100 mL)
9. additionMethyl tert-butyl ether (100 mL) is added
10. concentrationthe solution is concentrated
11. customto provide a precipitate
12. filtrationThe solid is filtered
13. customdried under vacuum