Trifluoroacetic acid → Piperidine-4-carboxylic acid [4-phenyl-1-(3-phenyl-propyl)-butyl]-amide

HRID 1454125Notes

Reaction equation

HRID 1454125 reaction equation
C(OC([N:8]1[CH2:13][CH2:12][CH:11]([C:14](=[O:35])[NH:15][CH:16]([CH2:26][CH2:27][CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH2:17][CH2:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[CH2:10][CH2:9]1)=O)(C)(C)C.FC(F)(F)C(O)=O>C(Cl)Cl>[C:20]1([CH2:19][CH2:18][CH2:17][CH:16]([NH:15][C:14]([CH:11]2[CH2:12][CH2:13][NH:8][CH2:9][CH2:10]2)=[O:35])[CH2:26][CH2:27][CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 121367444-[4-Phenyl-1-(3-phenyl-propyl)-butylcarbamoyl]-piperidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 12020260Piperidine-4-carboxylic acid [4-phenyl-1-(3-phenyl-propyl)-butyl]-amideYield 95.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

4-[4-Phenyl-1-(3-phenyl-propyl)-butylcarbamoyl]-piperidine-1-carboxylic acid tert-butyl ester (3) (0.77 g; 1.61 mmol) is dissolved in methylene chloride (20 mL) at ambient temperature. Trifluoroacetic acid (20 mL) is added in a slow stream, and the solution is stirred for 90 minutes at ambient temperature. The solution is concentrated in vacuo at 40° C. The residue is slurried in a mixture of methylene chloride (10 mL) and water (100 mL), then potassium carbonate is added until the slurry is alkaline. The slurry is diluted with water (200 mL) then extracted with methylene chloride (3×100 mL). The organic extracts are dried over MgSO4, filtered, and concentrated in vacuo affording the desired product (0.58 g) as an oil.

Workup

  1. concentrationThe solution is concentrated in vacuo at 40° C
  2. additionThe residue is slurried in a mixture of methylene chloride (10 mL) and water (100 mL)
  3. additionpotassium carbonate is added until the slurry
  4. additionThe slurry is diluted with water (200 mL)
  5. extractionthen extracted with methylene chloride (3×100 mL)
  6. dry with materialThe organic extracts are dried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-40efe084f2f6422882c45b37aca0a8d7
Source dataset
uspto-grants-2009_01
Patent number
US07476680B2

Reaction notes

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