Water → Ethyl 4-(4-hydroxypiperidin-1-yl)benzoate

HRID 2217356Notes

Reaction equation

HRID 2217356 reaction equation
[CH2:1]([O:3][C:4](=[O:12])[C:5]1[CH:10]=[CH:9][C:8](F)=[CH:7][CH:6]=1)[CH3:2].[NH:13]1[CH2:18][CH2:17][CH:16]([OH:19])[CH2:15][CH2:14]1.C(=O)([O-])[O-].[K+].[K+].O>CS(C)=O>[CH2:1]([O:3][C:4](=[O:12])[C:5]1[CH:10]=[CH:9][C:8]([N:13]2[CH2:18][CH2:17][CH:16]([OH:19])[CH2:15][CH2:14]2)=[CH:7][CH:6]=1)[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 67976Benzoic acid, 4-fluoro-, ethyl esterHCID 79341Piperidin-4-ol

Product 1

HCID 12717445Ethyl 4-(4-hydroxypiperidin-1-yl)benzoateYield 64.2%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Conditions

Temperature
120 °C

Procedure

A mixture of 4-fluoro-benzoic acid ethyl ester (1.68 g, 10 mmoles), piperidin-4-ol (1.12 g, 11 mmoles) and anhydrous potassium carbonate (138 g, 10 mmoles) in DMSO (10 ml) was heated at 120° C. for 6 hours. After cooling, the mixture was poured into water and ice (500 ml) and extracted with ethyl acetate. The organic layer was washed with water and brine, dried and evaporated. The residue was purified by flash chromatography on silica gel using hexane/EtOAc (10/30) as eluent to give the title compound as a white solid (1.6 g, 64%).

Workup

  1. temperatureAfter cooling
  2. extractionextracted with ethyl acetate
  3. washThe organic layer was washed with water and brine
  4. customdried
  5. customevaporated
  6. customThe residue was purified by flash chromatography on silica gel

Sources & evidence

ORD record
ord-41ec941f07dc401b876f5349f3f4a14d
Source dataset
uspto-grants-2008_08
Patent number
US07407971B2

Reaction notes

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