Hydrochloric Acid → (2S)-3,3,3-trifluoro-2-hydroxypropanoic acid

Temperature

65 °C

To a flask charged with (S)-3,3,3-trifluoro-2-hydroxypropanoyl cyanide (139 mg, 1 mmol) was added 3 N NaOH (6 mL) and 30% H2O2 (2.25 mL). The reaction mixture was heated at 65° C. for 1 h, then at 100° C. for a further 1 h. The reaction mixture was allowed to cooled to room temperature over 1 hr, then cool to 0° C. and the solution acidified with 6 N HCl (3 mL). The aqueous portion was extracted with ether (4×10 mL). The combined organic portions were dried over MgSO4, filtered and concentrated to give (S)-3,3,3-trifluoro-2-hydroxypropanoic acid as a clear oil (129 mg, 90% yield). NMR: 400 MHz 1H (CDCl3) 4.45 ppm, 1 H, m; 2.77 ppm, 2 H, m.

1. temperatureto cooled to room temperature over 1 hr
2. temperaturecool to 0° C.
3. extractionThe aqueous portion was extracted with ether (4×10 mL)
4. dry with materialThe combined organic portions were dried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated

ORD record

ord-7049e37e761a4a1d969ad5f78ba16b27

Source dataset

uspto-grants-2011_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07888376B2