Lithium hydroxide, monohydrate → 3-{[2-Fluoro-1-(fluoromethyl)ethyl]oxy}-5-[(phenylmethyl)oxy]benzoic acid

HRID 1990156Notes

Reaction equation

HRID 1990156 reaction equation
O.[OH-].[Li+].[F:4][CH2:5][CH:6]([O:9][C:10]1[CH:11]=[C:12]([CH:17]=[C:18]([O:20][CH2:21][C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[CH:19]=1)[C:13]([O:15]C)=[O:14])[CH2:7][F:8]>O.C1COCC1>[F:4][CH2:5][CH:6]([O:9][C:10]1[CH:11]=[C:12]([CH:17]=[C:18]([O:20][CH2:21][C:22]2[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=2)[CH:19]=1)[C:13]([OH:15])=[O:14])[CH2:7][F:8]

Participants

5

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 59127098Methyl 3-(benzyloxy)-5-(1,3-difluoropropan-2-yloxy)benzoate

Product 1

HCID 591271423-{[2-Fluoro-1-(fluoromethyl)ethyl]oxy}-5-[(phenylmethyl)oxy]benzoic acidYield 90.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

A solution of lithium hydroxide monohydrate (2.32 g, 55.1 mmol) in water (100 mL) was added to a solution of methyl 3-{[2-fluoro-1-(fluoromethyl)ethyl]oxy}-5-[(phenylmethyl)oxy]benzoate (7.41 g, 22.0 mmol) in THF (200 mL) and the mixture allowed to stir at RT overnight. The THF was removed in vacuo and the resulting solution partitioned between water (100 mL) and ethyl acetate (250 mL). The ethyl acetate layer was separated, washed with brine and dried (MgSO4). The aqueous layer was then adjusted to pH 7 by addition of 1M hydrochloric acid and extracted with ethyl acetate (75 mL). The ethyl acetate layer was separated, washed with brine and dried (MgSO4). The ethyl acetate layers were combined and evaporated to give the required product (6.404 g).

Workup

  1. customThe THF was removed in vacuo
  2. customthe resulting solution partitioned between water (100 mL) and ethyl acetate (250 mL)
  3. customThe ethyl acetate layer was separated
  4. washwashed with brine
  5. dry with materialdried (MgSO4)
  6. additionThe aqueous layer was then adjusted to pH 7 by addition of 1M hydrochloric acid
  7. extractionextracted with ethyl acetate (75 mL)
  8. customThe ethyl acetate layer was separated
  9. washwashed with brine
  10. dry with materialdried (MgSO4)
  11. customevaporated

Sources & evidence

ORD record
ord-6e8b7d1c0d7d4bae8063c373a3186c6c
Source dataset
uspto-grants-2010_01
Patent number
US07642259B2

Reaction notes

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