Triethylamine → benzyl N-{[4-(2-tert-butylphenyl)piperazin-1-yl](oxo)acetyl}glycinate

HRID 534946Notes

Reaction equation

HRID 534946 reaction equation
[C:1]([C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[N:11]1[CH2:16][CH2:15][N:14]([C:17](=[O:21])[C:18](O)=[O:19])[CH2:13][CH2:12]1)([CH3:4])([CH3:3])[CH3:2].Cl.[NH2:23][CH2:24][C:25]([O:27][CH2:28][C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)=[O:26].CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.C(N(CC)CC)C.C(=O)([O-])O.[Na+]>C(#N)C>[C:1]([C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[N:11]1[CH2:16][CH2:15][N:14]([C:17](=[O:21])[C:18]([NH:23][CH2:24][C:25]([O:27][CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)=[O:26])=[O:19])[CH2:13][CH2:12]1)([CH3:3])([CH3:2])[CH3:4]

Participants

8

Reactant 6

HCID 8471TriethylamineHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 516892Sodium BicarbonateHCID 11701227Benzyl 2-aminoacetate hydrochlorideHCID 667508542-[4-(2-Tert-butylphenyl)piperazin-1-yl]-2-oxoacetic acid

Product 1

HCID 66751166benzyl N-{[4-(2-tert-butylphenyl)piperazin-1-yl](oxo)acetyl}glycinateYield 83.2%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A solution of [4-(2-tert-butylphenyl)piperazin-1-yl](oxo)acetic acid (Example 44, 0.300 g, 1.03 mmol), benzyl glycinate hydrochloride (0.250 g, 1.24 mmol), EDCI (0.238 g, 1.24 mmol), HOBt (0.168 g, 1.24 mmol) and triethylamine (201 μL, 1.44 mmol) in acetonitrile (10 mL) was stirred at room temperature for 2 days. The reaction mixture was poured into saturated sodium hydrogen carbonate solution and extracted with ethyl acetate. The organic layer was washed with saturated sodium hydrogen carbonate solution and brine, dried over MgSO4, and the solvent was evaporated under reduced pressure to give the crude product. The product was purified by flash column chromatography (silica gel, n-hexane/ethyl acetate=90:10 to 50:50) to provide benzyl N-{[4-(2-tert-butylphenyl)piperazin-1-yl](oxo)acetyl}glycinate (0.375 g, 83%) as a white powder.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with saturated sodium hydrogen carbonate solution and brine
  3. dry with materialdried over MgSO4
  4. customthe solvent was evaporated under reduced pressure
  5. customto give the crude product
  6. customThe product was purified by flash column chromatography (silica gel, n-hexane/ethyl acetate=90:10 to 50:50)

Sources & evidence

ORD record
ord-9a3edb4dbb7a413fb04dd084df549394
Source dataset
uspto-grants-2014_10
Patent number
US08853215B2

Reaction notes

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