Ammonium Chloride → (2S)-1-Azido-4,4,4-trifluoro-2-butanol

To a solution of (S)-2-(2,2,2-trifluoroethyl)oxirane (2.00 g, 16.0 mmol) in a mixture of EtOH (16 mL) and H2O (4 mL) were added NaN3 (2.06 g, 32.0 mmol) and NH4Cl (1.70 g, 32.0 mmol). After stirring at room temperature for 18 h, the reaction mixture was diluted with H2O (50 mL), extracted with Et2O (2×75 mL). The combined organic layer was dried over MgSO4, filtered and concentrated to give (S)-1-azido-4,4,4-trifluorobutan-2-ol as an oil (2.26 g, 83% yield). NMR: 400 MHz (CDCl3) 4.17 ppm, 1H, ddd, J=6.81, 3.74, 3.52 Hz; 3.48 ppm, 1H, m; 3.37 ppm, 1H, m; 2.35 ppm, 2H, m.

1. extractionextracted with Et2O (2×75 mL)
2. dry with materialThe combined organic layer was dried over MgSO4
3. filtrationfiltered
4. concentrationconcentrated

ORD-Eintrag

ord-5f448144d15c45b7bf9d8ee82acff292

Quelldatensatz

uspto-grants-2010_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07790770B2