N-bromobutanimide → 4-Bromo-2-fluoro-3-(trifluoromethoxy)aniline

Temperatur

0 °C

To a solution of 2-fluoro-3-(trifluoromethoxy)aniline (1.0 g, 5.13 mmol) dissolved in DMF (2 mL) at 0° C. was slowly added a solution of cold N-bromosuccinimide (0.91 g, 5.13 mmol) dissolved in DMF (6 mL) over 5 min. The reaction mixture was stirred at 0° C. for 1 h, extracted with EtOAc (125 mL) and washed with water (3×25 mL). The combined aqueous layers were extracted with EtOAc (75 mL). The combined organic layers were washed with brine (25 mL), dried over sodium sulfate, filtered, and concentrated to produce the title compound as a dark colored liquid (1.27 g, 90% yield). (m/z): [M+H]+ calcd for C7H4BrF4NO 273.94. found 273.8.

1. extractionextracted with EtOAc (125 mL)
2. washwashed with water (3×25 mL)
3. extractionThe combined aqueous layers were extracted with EtOAc (75 mL)
4. washThe combined organic layers were washed with brine (25 mL)
5. dry with materialdried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated

ORD-Eintrag

ord-ea54609e682441489aee18255c5c80b3

Quelldatensatz

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09212168B2