Benzoic Acid → N-[2-(4-benzoyl-piperazin-1-yl)-2-oxo-ethyl]-4-phenoxy-benzamide

HRID 1178037Notes

Reaction equation

HRID 1178037 reaction equation
CCN(C(C)C)C(C)C.[C:10](O)(=[O:17])[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.Cl.[O:41]=[C:42]([N:60]1[CH2:65][CH2:64][NH:63][CH2:62][CH2:61]1)[CH2:43][NH:44][C:45](=[O:59])[C:46]1[CH:51]=[CH:50][C:49]([O:52][C:53]2[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=2)=[CH:48][CH:47]=1>CN(C=O)C.O>[C:10]([N:63]1[CH2:62][CH2:61][N:60]([C:42](=[O:41])[CH2:43][NH:44][C:45](=[O:59])[C:46]2[CH:47]=[CH:48][C:49]([O:52][C:53]3[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=3)=[CH:50][CH:51]=2)[CH2:65][CH2:64]1)(=[O:17])[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1

Participants

8

Reactant 5

HCID 243Benzoic AcidHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 66953134N-(2-Oxo-2-piperazin-1-yl-ethyl)-4-phenoxy-benzamide hydrochloride

Product 1

HCID 59559593N-[2-(4-benzoyl-piperazin-1-yl)-2-oxo-ethyl]-4-phenoxy-benzamideYield 57%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

DIPEA (0.138 mL, 0.80 mmol) was added drop wise to benzoic acid (39 mg, 0.32 mmol) in DMF (5 mL). EDCI (127 mg, 0.67 mmol) and HOBT (43 mg, 0.32 mmol) were added consecutively. After 10 mins, N-(2-Oxo-2-piperazin-1-yl-ethyl)-4-phenoxy-benzamide hydrochloride (100 mg, 0.27 mmol) was added and the resulting mixture was stirred at room temperature overnight. Water was then added, and the product was extracted with EtOAc. The organic layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure to afford the crude product. Purification using column chromatography (silica gel of mesh size of 60-120 using 70:30 EtOAc:hexane as eluent) afforded N-[2-(4-benzoyl-piperazin-1-yl)-2-oxo-ethyl]-4-phenoxy-benzamide in 57% yield. LC-MS purity: 99%, 1H NMR (DMSO-D6): δ 8.6 (t, 1H), 7.9 (d, 2H), 7.5 (m, 7H), 7.2 (t, 1H), 7.1 (m, 4H), 4.2 (d, 2H), 3.6 (m, 8H).

Workup

  1. extractionthe product was extracted with EtOAc
  2. washThe organic layer was washed with brine
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated under reduced pressure
  5. customto afford the crude product
  6. customPurification

Sources & evidence

ORD record
ord-7eccad8fd1664dc6839f20113a06eeb7
Source dataset
uspto-grants-2010_11
Patent number
US07842696B2

Reaction notes

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