Water → HCID 21187882, compound

HRID 1584949Notes

Reaction equation

HRID 1584949 reaction equation
[CH:1]1([O:6][C:7]2[CH:8]=[C:9]([CH:14]=[CH:15][C:16]=2[O:17][CH:18]([F:20])[F:19])[C:10]([O:12]C)=[O:11])[CH2:5][CH2:4][CH2:3][CH2:2]1.C(=O)([O-])[O-].[K+].[K+].O>CO>[CH:1]1([O:6][C:7]2[CH:8]=[C:9]([CH:14]=[CH:15][C:16]=2[O:17][CH:18]([F:19])[F:20])[C:10]([OH:12])=[O:11])[CH2:2][CH2:3][CH2:4][CH2:5]1

Participants

5

Reactant 3

HCID 962WaterHCID 11430Potassium CarbonateHCID 21187956HCID 21187956, compound

Product 1

HCID 21187882HCID 21187882, compound

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A solution of methyl 3-cyclopentyloxy-4-difluoromethoxybenzoate (0.6 g; that is prepared as described in Reference Example 41) in methanol (10 mL) is treated with potassium carbonate (0.35 g) and water (4 mL), and then it is heated at reflux for 3 hours. Methanol is evaporated off under reduced pressure, and the residue is dissolved in water (40 mL). The solution is washed with diethyl ether (40 mL), acidified with concentrated hydrochloric acid, and extracted with ethyl acetate (3×40 mL). The combined ethyl acetate extracts are dried over magnesium sulfate and evaporated under reduced pressure, to give 3-cyclopentyloxy-4-difluoromethoxybenzoic acid (0.47 g), in the form of a white solid, m.p. 126-128° C.

Workup

  1. customthat is prepared
  2. temperatureit is heated
  3. temperatureat reflux for 3 hours
  4. customMethanol is evaporated off under reduced pressure
  5. dissolutionthe residue is dissolved in water (40 mL)
  6. washThe solution is washed with diethyl ether (40 mL)
  7. extractionextracted with ethyl acetate (3×40 mL)
  8. dry with materialThe combined ethyl acetate extracts are dried over magnesium sulfate
  9. customevaporated under reduced pressure

Sources & evidence

ORD record
ord-57c6b97383614a66ac5e8227fbe2ca87
Source dataset
uspto-grants-1999_08
Patent number
US05935978

Reaction notes

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