Lithium hydroxide, monohydrate → 4'-Methyl-5-(5-trifluoromethyl-tetrazol-1-yl)-biphenyl-3-carboxylic acid

HRID 84748Notes

Reaction equation

HRID 84748 reaction equation
C[O:2][C:3]([C:5]1[CH:6]=[C:7]([C:20]2[CH:25]=[CH:24][C:23]([CH3:26])=[CH:22][CH:21]=2)[CH:8]=[C:9]([N:11]2[C:15]([C:16]([F:19])([F:18])[F:17])=[N:14][N:13]=[N:12]2)[CH:10]=1)=[O:4].O[Li].O>C1COCC1.O>[CH3:26][C:23]1[CH:24]=[CH:25][C:20]([C:7]2[CH:8]=[C:9]([N:11]3[C:15]([C:16]([F:18])([F:19])[F:17])=[N:14][N:13]=[N:12]3)[CH:10]=[C:5]([C:3]([OH:4])=[O:2])[CH:6]=2)=[CH:21][CH:22]=1

Participants

5

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 578516694'-Methyl-5-(5-trifluoromethyl-tetrazol-1-yl)-biphenyl-3-carboxylic acid methyl ester

Product 1

HCID 578516394'-Methyl-5-(5-trifluoromethyl-tetrazol-1-yl)-biphenyl-3-carboxylic acidYield 97%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a stirred solution of 4′-methyl-5-(5-trifluoromethyl-tetrazol-1-yl)-biphenyl-3-carboxylic acid methyl ester (3.7 mmol, 1.34 g) in 50 ml of THF was added a solution of LiOH.H2O (18.5 mmol, 776.3 mg) in 12 mL of water. The reaction mixture was heated to reflux for 3.5 hours, then cooled to room temperature. Solvent was removed under reduced pressure, and the pH of the liquid residue was adjusted to 2.0 by addition of 2N aqueous HCl solution. The mixture was extracted with ethyl acetate and the combined ethyl acetate layers were dried over anhydrous Na2SO4 and concentrated in vacuo to give 4′-methyl-5-(5-trifluoromethyl-tetrazol-1-yl)-biphenyl-3-carboxylic acid as light yellow solid (1.25 g, 97% yield).

Workup

  1. temperatureThe reaction mixture was heated
  2. temperatureto reflux for 3.5 hours
  3. customSolvent was removed under reduced pressure
  4. additionthe pH of the liquid residue was adjusted to 2.0 by addition of 2N aqueous HCl solution
  5. extractionThe mixture was extracted with ethyl acetate
  6. dry with materialthe combined ethyl acetate layers were dried over anhydrous Na2SO4
  7. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-8bc5a95c1527499f964c6858032c5930
Source dataset
uspto-grants-2014_09
Patent number
US08846945B2

Reaction notes

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