Hydrochloric Acid → N-methyl-N'-{2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-terephthalamide

HRID 1177897Notes

Reaction equation

HRID 1177897 reaction equation
CCN(C(C)C)C(C)C.[CH3:10][NH:11][C:12](=[O:22])[C:13]1[CH:21]=[CH:20][C:16]([C:17](O)=[O:18])=[CH:15][CH:14]=1.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.[NH2:44][CH2:45][C:46]([N:48]1[CH2:53][CH2:52][N:51]([C:54](=[O:65])[C:55]2[CH:60]=[CH:59][CH:58]=[CH:57][C:56]=2[C:61]([F:64])([F:63])[F:62])[CH2:50][CH2:49]1)=[O:47].Cl>CN(C=O)C.O>[CH3:10][NH:11][C:12](=[O:22])[C:13]1[CH:21]=[CH:20][C:16]([C:17]([NH:44][CH2:45][C:46](=[O:47])[N:48]2[CH2:49][CH2:50][N:51]([C:54](=[O:65])[C:55]3[CH:60]=[CH:59][CH:58]=[CH:57][C:56]=3[C:61]([F:64])([F:62])[F:63])[CH2:52][CH2:53]2)=[O:18])=[CH:15][CH:14]=1

Participants

9

Reactant 6

HCID 313Hydrochloric AcidHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 5060584-((Methylamino)carbonyl)benzoic acidHCID 595596292-Amino-1-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethanone

Product 1

HCID 25167125N-methyl-N'-{2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-terephthalamideYield 15.74%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

DIPEA (165 mg, 0.2 mL, 1.2 mmol) was added drop wise to N-methyl-terephthalamic acid (80 mg, 0.4 mmol) in DMF (5 mL). EDCI (100 mg, 0.5 mmol) and HOBT (67 mg, 0.5 mmol) were added consecutively and, after 10 minutes, 2-Amino-1-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethanone in its HCl salt form (150 mg, 0.4 mmol) was added. The resulting mixture was stirred at room temperature overnight. Cold water was then added and the product was extracted with EtOAc and the organic layer was washed with brine. The organic phase was dried over Na2SO4 and concentrated under reduced pressure to get the residue. The obtained residue was purified by column chromatography (using basic alumina and 10% MeOH in CHCl3 as eluent) to afford 30 mg (15.74% yield) of N-methyl-N′-{2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-terephthalamide. LCMS Purity: 97.3%. 1H NMR (CDCl3): δ 8.7 (d, 2H), 8.2 (d, 2H), 7.8 (m, 1H), 7.7 (m, 3H), 7.2 (m, 2H), 4.4 (m, 2H), 4.1 (s, 1H), 3.8 (s, 3H), 3.4 (m, 4H).

Workup

  1. extractionthe product was extracted with EtOAc
  2. washthe organic layer was washed with brine
  3. dry with materialThe organic phase was dried over Na2SO4
  4. concentrationconcentrated under reduced pressure
  5. customto get the residue
  6. customThe obtained residue was purified by column chromatography (using basic alumina and 10% MeOH in CHCl3 as eluent)

Sources & evidence

ORD record
ord-da7de64d052d4faaa2687eccd33968fb
Source dataset
uspto-grants-2010_11
Patent number
US07842696B2

Reaction notes

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