Water → Ethyl 1-benzylpiperidine-4-carboxylate

HRID 1689902Notes

Reaction equation

HRID 1689902 reaction equation
[CH2:1]([O:3][C:4]([CH:6]1[CH2:11][CH2:10][NH:9][CH2:8][CH2:7]1)=[O:5])[CH3:2].C(=O)([O-])[O-].[K+].[K+].[CH2:18](Br)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1.O>CC#N>[CH2:1]([O:3][C:4]([CH:6]1[CH2:11][CH2:10][N:9]([CH2:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[CH2:8][CH2:7]1)=[O:5])[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 7498Benzyl BromideHCID 11430Potassium CarbonateHCID 70770Ethyl 4-piperidinecarboxylate

Product 1

HCID 90423Ethyl 1-benzylpiperidine-4-carboxylate

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
78 °C

Procedure

Amine preparation: To a solution of piperidine-4-carboxylic acid ethyl ester (3.0 g) stirring in dry MeCN (30 mL) was added potassium carbonate (2.90 g) followed by benzyl bromide (2.5 mL). The mixture was warmed to 78° C. After 3 h the mixture was cooled, poured into water (100 mL) and extracted into ethyl acetate, dried (MgSO4) and the solvent removed in vacuo. The residue was purified using flash chromatography to give 1-benzyl-piperidine-4-carboxylic acid ethyl ester (2.17 g) as a pale yellow oil.

Workup

  1. temperatureAfter 3 h the mixture was cooled
  2. extractionextracted into ethyl acetate
  3. dry with materialdried (MgSO4)
  4. customthe solvent removed in vacuo
  5. customThe residue was purified

Sources & evidence

ORD record
ord-9f23ba576b7148b08327354b408a7608
Source dataset
uspto-grants-2012_04
Patent number
US08153629B2

Reaction notes

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