Lithium Hydroxide → 2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)acetic acid

HRID 62053

Reaction equation

HRID 62053 reaction equation
[F:1][C:2]([F:27])([F:26])[O:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[CH:14]=[N:13][C:12]([C:15]3[CH:20]=[CH:19][C:18]([CH2:21][C:22]([O:24]C)=[O:23])=[CH:17][CH:16]=3)=[N:11]2)=[CH:6][CH:5]=1.[OH-].[Li+]>O1CCCC1.CO.O>[F:27][C:2]([F:1])([F:26])[O:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[CH:14]=[N:13][C:12]([C:15]3[CH:20]=[CH:19][C:18]([CH2:21][C:22]([OH:24])=[O:23])=[CH:17][CH:16]=3)=[N:11]2)=[CH:6][CH:5]=1

Participants

6

Reactant 2

HCID 3939Lithium HydroxideHCID 90405381methyl 2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)acetate

Product 1

HCID 904042172-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)acetic acidYield 98.5%

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

In a 100 mL flask, methyl 2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)acetate (3.45 g, 9.14 mmol) and lithium hydroxide.hydrate (1.15 g, 27.4 mmol) were diluted with tetrahydrofuran (24.4 mL), methanol (24.4 mL), water (12.2 mL). The reaction was stirred at room temperature for 2 hours. The solvent was evaporated and the resulting solid was diluted with water and adjusted to pH 3 with hydrogen chloride (1 N). The resulting precipitate was extracted with ethyl acetate (5×100 mL). The combined organics were dried over magnesium sulfate, filtered, and concentrated to give the title compound as a white solid (3.27 g, 96%): 1H NMR (400 MHz, DMSO-d6) δ 12.41 (s, 1H), 9.40 (s, 1H), 8.15-8.03 (m, 4H), 7.63 (dq, J=7.9, 1.0 Hz, 2H), 7.49-7.36 (m, 2H), 3.66 (s, 2H), 3.35 (s, 3H); 19F NMR (376 MHz, DMSO-d6) δ −56.98; ESIMS m/z 364 ([M+H]+).

Workup

  1. customThe solvent was evaporated
  2. additionthe resulting solid was diluted with water
  3. extractionThe resulting precipitate was extracted with ethyl acetate (5×100 mL)
  4. dry with materialThe combined organics were dried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-8de628aad8cd472a84cf4e430d314bd6
Source dataset
uspto-grants-2016_09
Patent number
US09445594B2

Linked notes

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