3-Pyridineacetic acid → HCID 10709719, compound

HRID 496621Notes

Reaction equation

HRID 496621 reaction equation
[C:1]([N:8]1[CH2:13][CH2:12][NH:11][CH2:10][CH2:9]1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].[N:14]1[CH:19]=[CH:18][CH:17]=[C:16]([CH2:20][C:21](O)=[O:22])[CH:15]=1.C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C>CN(C=O)C.O.C(OCC)(=O)C>[C:1]([N:8]1[CH2:9][CH2:10][N:11]([C:21](=[O:22])[CH2:20][C:16]2[CH:15]=[N:14][CH:19]=[CH:18][CH:17]=2)[CH2:12][CH2:13]1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2]

Participants

8

Reactant 4

HCID 1083-Pyridineacetic acidHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 143452tert-Butyl piperazine-1-carboxylate

Product 1

HCID 10709719HCID 10709719, compoundYield 69.1%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

1-Boc-piperazine (12 g, 64 mmol), 3-pyridylacetic acid (8.85 g, 64 mmol), and HOBt (8.64 g, 64 mmol) were dissolved in DMF. To this solution, EDCI (14.7 g, 76.8 mmol) was added in portions. The mixture became homogenous and was stirred for 3 h. The mixture was diluted with water and ethyl acetate. The layers were separated, and the aqueous layer extracted with ethyl acetate. The organic layers were washed with water and brine, dried (Na2SO4), filtered, and concentrated to provide a yellow solid. The crude product was purified by recrystallization from hexanes:dichloromethane to provide 1-Boc-4-[(3-pyridinyl)acetyl]piperazine (13.5 g, 69%) as a white solid.

Workup

  1. customThe layers were separated
  2. extractionthe aqueous layer extracted with ethyl acetate
  3. washThe organic layers were washed with water and brine
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customto provide a yellow solid
  8. customThe crude product was purified by recrystallization from hexanes

Sources & evidence

ORD record
ord-4e2529977a8a41f996968a2a717cc62d
Source dataset
uspto-grants-2005_09
Patent number
US06946467B2

Reaction notes

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