Sodium Chloride → 4,4,4-Trifluoro-3,3-dimethylbutanamide

A solution of 4,4,4-trifluoro-3,3-dimethylbutanoic acid [See: US2010/0240663](0.6 g, 3.53 mmol) in thionyl chloride (6 mL, 82 mmol) was heated at 60° C. for 2 h, cooled to RT and concentrated to dryness. The residue was dissolved in DCM (2 mL), added drop-wise to a mixture of THF (8 mL) and NH4OH (˜15M, 8 mL, ˜120 mmol) and stirred at RT overnight. Solid NaCl was added until saturated, the mixture extracted with 4:1 DCM/THF (3×) and the combined organics were washed with satd. NaHCO3, then brine, dried over Na2SO4 and concentrated to dryness to afford 4,4,4-trifluoro-3,3-dimethylbutanamide (240 mg, 40%). 1H NMR (400 MHz, DMSO-d6): δ 7.46 (s, 1H), 6.93 (s, 1H), 2.20 (s, 2H), 1.18 (s, 6H).

1. concentrationconcentrated to dryness
2. dissolutionThe residue was dissolved in DCM (2 mL)
3. additionadded drop-wise
4. extractionextracted with 4:1 DCM/THF (3×)
5. washthe combined organics were washed with satd
6. dry with materialNaHCO3, then brine, dried over Na2SO4
7. concentrationconcentrated to dryness

ORD record

ord-84c418ae54d3493c8bbe84101cfd6de0

Source dataset

uspto-grants-2016_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09382228B2