Reaktion #160910

Reaktionsgleichung

4-trifluoromethoxyaniline

SOCl2

3-bromo-4-fluorobenzoic acid

HCl

DIPEA

→

title compound

3-Bromo-4-fluoro-N-(4-(trifluoromethoxy)phenyl)benzamide

Lösungsmittel

THF

toluene

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe solvent was evaporated off under reduced pressure
2. 2
   workup.ADDITIONthe residue was diluted with THF (15 mL)
3. 3
   Temperaturthe mixture was cooled to 0° C.
4. 4
   workup.STIRRINGstirred for 1 h
5. 5
   Extraktionextracted with TBME
6. 6
   WaschenThe combined extracts were washed with aq. 1 M HCl, aq. 1 M NaOH and brine
7. 7
   Trocknendried over MgSO4
8. 8
   Sonstigethe solvent was evaporated off under reduced pressure
9. 9
   Sonstigeto give a residue
10. 10
    Sonstigewas crystallized from n-heptane/DCM

Vorschrift

SOCl2 (2.92 mL, 40.0 mmol) and DMF (0.5 mL) were added dropwise to a suspension of 3-bromo-4-fluorobenzoic acid (1.752 g, 8 mmol) in toluene (20 mL) and the RM was stirred at 80° C. for 1 h. The solvent was evaporated off under reduced pressure and the residue was diluted with THF (15 mL). DIPEA (2.79 mL, 16.00 mmol) was added and the mixture was cooled to 0° C., treated with a solution of 4-trifluoromethoxyaniline (1.181 mL, 8.80 mmol) in THF (5 mL) and stirred for 1 h. The RM was treated with aq. 1 M HCl (50 mL), and extracted with TBME. The combined extracts were washed with aq. 1 M HCl, aq. 1 M NaOH and brine, dried over MgSO4 and the solvent was evaporated off under reduced pressure to give a residue was crystallized from n-heptane/DCM to afford the title compound as a white solid. UPLC-MS (Condition 1) tR=3.18 min, m/z=377.9/379.9 [M+H]+, m/z=375.9/377.9 [M−H]−; 1H-NMR (400 MHz, DMSO-d6) δ ppm 7.38 (d, J=8.6 Hz, 2H) 7.56 (t, J=8.7 Hz, 1H) 7.87 (d, J=9.0 Hz, 2H) 8.00-8.06 (m, 1H) 8.32 (dd, J=6.6, 2.2 Hz, 1H) 10.50 (s, 1H).

Quelle