Water → (2R)-4,4,4-trifluoro-2-methylbutan-1-ol

Temperature

25 °C

A solution of lithium borohydride (23 mL, 2.0 M in THF, 45 mmol) was added dropwise to a solution of (4R)-4-benzyl-3-[(2R)-4,4,4-trifluoro-2-methylbutanoyl]-1,3-oxazolidin-2-one (12.9 g, 40.9 mmol) and water (810 μL, 45.0 mmol) in diethyl ether (200 mL) at 0° C. The reaction mixture was allowed to warm to 25° C. and, after 1 h, was cooled to 0° C. and quenched with aqueous 1 N NaOH (124 mL). The mixture was warmed to 25° C. and stirred until both layers were homogeneous. The layers were separated and the organic extract washed with brine, dried using MgSO4 and concentrated. Flash chromatography (eluent: 3:7 ether-petether) provided (2R)-4,4,4-trifluoro-2-methylbutan-1-ol (5.05 g, 87%) as a colorless oil. 1H NMR was identical to that which was found in the literature (J. Med. Chem. 37: 1282-1297 (1994)).

1. temperaturewas cooled to 0° C.
2. customquenched with aqueous 1 N NaOH (124 mL)
3. temperatureThe mixture was warmed to 25° C.
4. customThe layers were separated
5. extractionthe organic extract
6. washwashed with brine
7. customdried
8. concentrationconcentrated

ORD record

ord-91e37d04f69c40a7ae11251848056ecc

Source dataset

uspto-grants-2009_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07547725B2