Hydrochloric Acid → (2-(4-Bromo-2-fluoro-benzylcarbamoyl)-5-methoxy-phenoxy]-acetic acid

HRID 457944Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 457944
C([O:3][C:4](=[O:26])[CH2:5][O:6][C:7]1[CH:12]=[C:11](Cl)[CH:10]=[CH:9][C:8]=1[C:14](=[O:25])[NH:15][CH2:16][C:17]1[CH:22]=[CH:21][C:20]([Br:23])=[CH:19][C:18]=1[F:24])C.[OH-].[Na+].Cl.[CH2:30]([OH:32])C>C(OCC)(=O)C>[Br:23][C:20]1[CH:21]=[CH:22][C:17]([CH2:16][NH:15][C:14]([C:8]2[CH:9]=[CH:10][C:11]([O:32][CH3:30])=[CH:12][C:7]=2[O:6][CH2:5][C:4]([OH:3])=[O:26])=[O:25])=[C:18]([F:24])[CH:19]=1

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 702EthanolHCID 14798Sodium HydroxideHCID 22093478[2-(4-Bromo-2-fluoro-benzylcarbamoyl)-5-chloro-phenoxy]-acetic acid ethyl ester

Produkt 1

HCID 22093455(2-(4-Bromo-2-fluoro-benzylcarbamoyl)-5-methoxy-phenoxy]-acetic acidAusbeute 89 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A solution of [2-(4-bromo-2-fluoro-benzylcarbamoyl)-5-chloro-phenoxy]-acetic acid ethyl ester (1.23 g, 2.8 mmol) in ethanol (16 mL, 0.18 M) was cooled to 0° C. and treated with aq NaOH (1.25 M, 7.0 mL, 8.7 mmol). After stirring for 2.5 h, the solution was warmed to room temperature and stirred an additional 24 h. Next, the solution was acidified to pH 1–2 with 2 N HCl, diluted with ethyl acetate and washed with saturated aq NaCl. The organic layer was dried over Na2SO4, filtered and concentrated to give (2-(4-bromo-2-fluoro-benzylcarbamoyl)-5-methoxy-phenoxy]-acetic acid as a white solid (1.03 g, 89%): mp 203–204° C.; Rf 0.10 (10% methanol in dichloromethane); 1H NMR (DMSO-d6, 300 MHz) δ 9.02 (br t, J=5.9 Hz, 1 H), 7.84, (d, J=8.2 Hz. 1 H), 7.50, (br d, J=8.7 Hz, 1 H), 7.48–7.29 (m, 2 H), 6.69–6.80 (m, 2 H), 4.87 (s, 2 H), 4.49 (d, J=5.8 Hz, 2 H), 3.79 (s, 3 H). ESI-LC/MS m/z calcd for C17H15BrFNO5: 411.0; found 412.0 (M+1)−. Anal. calcd for C17H15BrFNO5: C, 49.53; H, 3.67; N, 3.40. Found C, 49.48; H, 3.68; N, 3.39.

Aufarbeitung

  1. stirringstirred an additional 24 h
  2. washwashed with saturated aq NaCl
  3. dry with materialThe organic layer was dried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-922c240b8a5b4227a0e4ff37a5395968
Quelldatensatz
uspto-grants-2007_03
Patentnummer
US07189749B2

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