1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → tert-Butyl cis(+/-)-3-(benzyloxy)-4-[(1H-imidazol-2-ylcarbonyl)amino]piperidine-1-carboxylate

HRID 43556Notes

Reaction equation

HRID 43556 reaction equation
[NH2:1][C@H:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:4][C@H:3]1[O:15][CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.[NH:23]1[CH:27]=[CH:26][N:25]=[C:24]1[C:28](O)=[O:29].CCN=C=NCCCN(C)C>CC(N(C)C)=O.CN(C1C=CN=CC=1)C.ClCCl>[CH2:16]([O:15][C@H:3]1[C@@H:2]([NH:1][C:28]([C:24]2[NH:23][CH:27]=[CH:26][N:25]=2)=[O:29])[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:4]1)[C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1

Participants

7

Reactant 3

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 5743211H-Imidazole-2-carboxylic acidHCID 86648571tert-Butyl cis(+/-)-4-amino-3-(benzyloxy)piperidine-1-carboxylate

Product 1

HCID 86648572tert-Butyl cis(+/-)-3-(benzyloxy)-4-[(1H-imidazol-2-ylcarbonyl)amino]piperidine-1-carboxylateYield 46%

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolventHCID 31374DimethylacetamideSolvent

Procedure

tert-Butyl cis(±)-4-amino-3-(benzyloxy)piperidine-1-carboxylate obtained in Example (90d) (0.92 g, 3.0 mmol) was dissolved in DMA (10 mL). 1H-Imidazol-2-ylcarboxylic acid (0.19 g, 1.70 mmol), WSC (0.82 g, 0.43 mmol) and DMAP (60 mg, 0.49 mmol) were added, and the mixture was stirred at room temperature for one hour. The reaction solution was diluted with dichloromethane, washed with water and brine, and dried over anhydrous magnesium sulfate. Following concentration under reduced pressure, the residue was purified by silica gel column chromatography (elution solvent: hexane/ethyl acetate=2/1, 1/1, 1/3) to obtain 0.31 g of the title compound as a colorless solid (46%).

Workup

  1. washwashed with water and brine
  2. dry with materialdried over anhydrous magnesium sulfate
  3. concentrationconcentration under reduced pressure
  4. customthe residue was purified by silica gel column chromatography (elution solvent: hexane/ethyl acetate=2/1, 1/1, 1/3)

Sources & evidence

ORD record
ord-6ada824c5f7d49eabc652f587934db6c
Source dataset
uspto-grants-2013_09
Patent number
US08536197B2

Reaction notes

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