Hydrochloric Acid → 1341352-20-2

Temperature

0 °C

To a round-bottom flask equipped with a stir bar and placed under N2 atmosphere was added THF (50 mL), then trimethyl(trifluoromethyl)silane (1.03 mL, 6.99 mmol). The solution was cooled to 0° C. and to the solution was added dihydro-2H-pyran-3(4H)-one (500 mg, 4.99 mmol). The solution was stirred for 5 minutes at 0° C. and then was allowed to warm to room temperature with stirring for 30 minutes. The solution was cooled to 0° C. and to the solution was added aq 1M HCl (50 mL). The mixture was stirred at room temperature overnight. The mixture was diluted with water and EtOAc and was transferred to a separatory funnel. The organic phase was isolated; washed with brine; dried over MgSO4, filtered; then concentrated in vacuo to afford 3-(trifluoromethyl)tetrahydro-2H-pyran-3-ol as a colorless oil (0.40 g, 47%). 1H-NMR (400 MHz, CDCl3) δ 4.01-3.93 (m, 1H), 3.82 (dd, J=11.8, 2.5 Hz, 1H), 3.60 (d, J=12.0 Hz, 1H), 3.41 (td, J=11.8, 2.5 Hz, 1H), 2.10-2.08 (m, 2H), 1.97-1.90 (m, 1H), 1.82 (dd, J=12.9, 4.4 Hz, 1H), 1.65-1.55 (m, 1H).

1. customTo a round-bottom flask equipped with a stir bar
2. temperatureto warm to room temperature
3. stirringwith stirring for 30 minutes
4. temperatureThe solution was cooled to 0° C. and to the solution
5. stirringThe mixture was stirred at room temperature overnight
6. customwas transferred to a separatory funnel
7. customThe organic phase was isolated
8. washwashed with brine
9. dry with materialdried over MgSO4
10. filtrationfiltered
11. concentrationthen concentrated in vacuo

ORD record

ord-a94644fdf47f47759e8bf82eff6ecab5

Source dataset

uspto-grants-2016_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09334279B2