Trifluoroacetic acid → 1-(Piperidine-4-carbonyl)-piperidine-2-carboxylic acid [4-phenyl-1(3-phenyl-propyl)-butyl]-amide

HRID 843345Notes

Reaction equation

HRID 843345 reaction equation
[C:1]1([CH2:7][CH2:8][CH2:9][CH:10]([NH:20][C:21]([CH:23]2[CH2:28][CH2:27][CH2:26][CH2:25][N:24]2[C:29]([CH:31]2[CH2:36][CH2:35][N:34](C(OC(C)(C)C)=O)[CH2:33][CH2:32]2)=[O:30])=[O:22])[CH2:11][CH2:12][CH2:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.FC(F)(F)C(O)=O>C(Cl)Cl>[C:1]1([CH2:7][CH2:8][CH2:9][CH:10]([NH:20][C:21]([CH:23]2[CH2:28][CH2:27][CH2:26][CH2:25][N:24]2[C:29]([CH:31]2[CH2:36][CH2:35][NH:34][CH2:33][CH2:32]2)=[O:30])=[O:22])[CH2:11][CH2:12][CH2:13][C:14]2[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 187275031-(1-Tert-butoxycarbonylpiperidine-4-carbonyl)-piperidine-2 carboxylic acid [4-phenyl-1-(3-phenyl-propyl)-butyl]-amide

Product 1

HCID 187274921-(Piperidine-4-carbonyl)-piperidine-2-carboxylic acid [4-phenyl-1(3-phenyl-propyl)-butyl]-amideYield 87.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

1-(1-tert-butoxycarbonylpiperidine-4-carbonyl)-piperidine-2-carboxylic acid [4-phenyl-1-(3-phenyl-propyl)-butyl]-amide (75) (1.41 g; 2.39 mmol) is dissolved in methylene chloride (30 mL) at ambient temperature. Trifluoroacetic acid (15S mL) is added in a slow stream, and the solution is stirred for 2.25 hours at ambient temperature. The solution is concentrated in vacuo at 40° C. The residue is dissolved in methylene chloride (200 mL) and poured onto saturated sodium bicarbonate solution. The pH is adjusted to 9 with saturated potassium carbonate solution. The mixture is shaken the layers separated. The water layer is extracted with methylene chloride (3×50 mL). The combined organic extracts are washed with water, dried over MgSO4, filtered, and concentrated in vacuo affording the desired product (1.02 g) as an oil. ESMS: MH+ 490.4

Workup

  1. concentrationThe solution is concentrated in vacuo at 40° C
  2. dissolutionThe residue is dissolved in methylene chloride (200 mL)
  3. additionpoured onto saturated sodium bicarbonate solution
  4. stirringThe mixture is shaken the layers
  5. customseparated
  6. extractionThe water layer is extracted with methylene chloride (3×50 mL)
  7. washThe combined organic extracts are washed with water
  8. dry with materialdried over MgSO4
  9. filtrationfiltered
  10. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-406785589bdb48b59e3254b75bd32c54
Source dataset
uspto-grants-2002_04
Patent number
US06376514B1

Reaction notes

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