2,4-Dimethylbenzoic acid → N-{2-[4-(2,4-dimethyl-benzoyl)-piperazin-1-yl]-2-oxo-ethyl}-4-phenoxy-benzamide

HRID 1178036Notes

Reaction equation

HRID 1178036 reaction equation
CCN(C(C)C)C(C)C.[CH3:10][C:11]1[CH:19]=[C:18]([CH3:20])[CH:17]=[CH:16][C:12]=1[C:13]([OH:15])=O.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.Cl.[O:43]=[C:44]([N:62]1[CH2:67][CH2:66][NH:65][CH2:64][CH2:63]1)[CH2:45][NH:46][C:47](=[O:61])[C:48]1[CH:53]=[CH:52][C:51]([O:54][C:55]2[CH:60]=[CH:59][CH:58]=[CH:57][CH:56]=2)=[CH:50][CH:49]=1>CN(C=O)C.O>[CH3:10][C:11]1[CH:19]=[C:18]([CH3:20])[CH:17]=[CH:16][C:12]=1[C:13]([N:65]1[CH2:66][CH2:67][N:62]([C:44](=[O:43])[CH2:45][NH:46][C:47](=[O:61])[C:48]2[CH:49]=[CH:50][C:51]([O:54][C:55]3[CH:56]=[CH:57][CH:58]=[CH:59][CH:60]=3)=[CH:52][CH:53]=2)[CH2:63][CH2:64]1)=[O:15]

Participants

8

Reactant 5

HCID 118972,4-Dimethylbenzoic 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 59559627N-{2-[4-(2,4-dimethyl-benzoyl)-piperazin-1-yl]-2-oxo-ethyl}-4-phenoxy-benzamideYield 56%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

DIPEA (0.138 mL, 0.80 mmol) was added drop wise to 2,4-Dimethylbenzoic acid (48 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 60:40 EtOAc:hexane as eluent) afforded N-{2-[4-(2,4-dimethyl-benzoyl)-piperazin-1-yl]-2-oxo-ethyl}-4-phenoxy-benzamide in 56% yield. LC-MS purity: 98%, 1H NMR (DMSO-D6): δ 8.5 (t, 1H), 7.9 (d, 2H), 7.4 (t, 2H), 7.2 (t, 1H), 7.1 (m, 7H), 4.1 (d, 2H), 3.6 (m, 4H), 3.4 (m, 2H), 3.2 (m, 2H), 2.3 (s, 3H), 2.2 (s, 3H).

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-bbbc1c2f285b41409231cfd8397dc045
Source dataset
uspto-grants-2010_11
Patent number
US07842696B2

Reaction notes

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