1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → tert-butyl (3S,5R)-3-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino)-5-(pyrrolidin-1-ylcarbonyl)piperidine-1-carboxylate

HRID 1259932Notes

Reaction equation

HRID 1259932 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][C@@H:12]([N:14]([C:19]([C:21]2[N:25]([CH2:26][CH2:27][CH2:28][CH2:29][O:30][CH3:31])[C:24]3[CH:32]=[CH:33][CH:34]=[CH:35][C:23]=3[N:22]=2)=[O:20])[CH2:15][CH:16]([CH3:18])[CH3:17])[CH2:11][C@@H:10]([C:36]([OH:38])=O)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[NH:39]1[CH2:43][CH2:42][CH2:41][CH2:40]1.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.C(=O)(O)[O-].[Na+]>CN(C=O)C>[CH3:31][O:30][CH2:29][CH2:28][CH2:27][CH2:26][N:25]1[C:24]2[CH:32]=[CH:33][CH:34]=[CH:35][C:23]=2[N:22]=[C:21]1[C:19]([N:14]([CH2:15][CH:16]([CH3:18])[CH3:17])[C@H:12]1[CH2:11][C@@H:10]([C:36]([N:39]2[CH2:43][CH2:42][CH2:41][CH2:40]2)=[O:38])[CH2:9][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:2])[CH3:3])=[O:7])[CH2:13]1)=[O:20]

Participants

7

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 31268PyrrolidineHCID 757711-HydroxybenzotriazoleHCID 516892Sodium BicarbonateHCID 58355779(3R,5S)-(tert-butoxycarbonyl)-5-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino]piperidine-3-carboxylic acid

Product 1

HCID 58355415tert-butyl (3S,5R)-3-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino)-5-(pyrrolidin-1-ylcarbonyl)piperidine-1-carboxylateYield 95.4%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
50 °C

Procedure

(3R,5S)-1-(tert-Butoxycarbonyl)-5-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino]piperidine-3-carboxylic acid (400 mg) and pyrrolidine (59 mg) were dissolved in DMF (10 ml), WSC.HCL (217 mg) and HOBt (150 mg) were added, and the mixture was stirred at 50° C. for 12 hr. The reaction mixture was poured into 10% aqueous sodium bicarbonate, and the mixture was extracted with ethyl acetate. The extracts were combined and washed with brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was subjected to silica gel column chromatography, and a fraction eluted with ethyl acetate-hexane (1:1-1:0) was concentrated under reduced pressure to give the object product (420 mg).

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washwashed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. customThe solvent was evaporated under reduced pressure
  5. washa fraction eluted with ethyl acetate-hexane (1:1-1:0)
  6. concentrationwas concentrated under reduced pressure

Sources & evidence

ORD record
ord-b7a20e76de3045eaba8c3bc78030bee1
Source dataset
uspto-grants-2013_06
Patent number
US08466282B2

Reaction notes

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