Trifluoroacetic acid → HCID 43347377, compound

Temperature

110 °C

4-Bromo-2-chloroaniline (5000 mg, 24.22 mmol) was dissolved in trifluoroacetic acid (40 ml) and 1,2-dimethoxyethane (50 ml) then cooled under argon to 0° C. To the mixture was added 2-picoline borane complex (12951.34 mg, 121.08 mmol) and then the reaction mixture was heated 110° C. for 90 minutes. Solvents were removed under reduced pressure and crude material was taken up in 1N HCl and stirred at 110° C. 30 minutes. Crude mixture was then diluted with EtOAc and water and extracted EtOAc (3 times). Organics were washed with water then brine, dried over sodium sulfate and evaporated to dryness under reduced pressure. Crude material was purified by silica gel chromatography using EtOAc/Hexanes as the eluent to afford 4-bromo-2-chloro-N-(2,2,2-trifluoroethyl)aniline.

1. additionTo the mixture was added 2-picoline borane complex (12951.34 mg, 121.08 mmol)
2. customSolvents were removed under reduced pressure and crude material
3. custom30 minutes
4. additionCrude mixture was then diluted with EtOAc and water
5. extractionextracted EtOAc (3 times)
6. washOrganics were washed with water
7. dry with materialbrine, dried over sodium sulfate
8. customevaporated to dryness under reduced pressure
9. customCrude material was purified by silica gel chromatography

ORD record

ord-4d982ea090904dd6bf58154637ad1252

Source dataset

uspto-grants-2016_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09255089B2