1-Hydroxybenzotriazole → 5-Phenyl-isoxazole-3-carboxylic acid {2-[4-(5-fluoro-2-trifluoromethyl-benzoyl)-piperazin-1-yl]-2-oxo-ethyl}-amide

HRID 1178132Notes

Reaction equation

HRID 1178132 reaction equation
C1C=CC2N(O)N=NC=2C=1.CCN(C(C)C)C(C)C.[C:20]1([C:26]2[O:30][N:29]=[C:28]([C:31]([OH:33])=O)[CH:27]=2)[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1.CCN=C=NCCCN(C)C.Cl.[NH2:46][CH2:47][C:48]([N:50]1[CH2:55][CH2:54][N:53]([C:56](=[O:68])[C:57]2[CH:62]=[C:61]([F:63])[CH:60]=[CH:59][C:58]=2[C:64]([F:67])([F:66])[F:65])[CH2:52][CH2:51]1)=[O:49]>CN(C=O)C.O>[F:63][C:61]1[CH:60]=[CH:59][C:58]([C:64]([F:66])([F:65])[F:67])=[C:57]([CH:62]=1)[C:56]([N:53]1[CH2:54][CH2:55][N:50]([C:48](=[O:49])[CH2:47][NH:46][C:31]([C:28]2[CH:27]=[C:26]([C:20]3[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=3)[O:30][N:29]=2)=[O:33])[CH2:51][CH2:52]1)=[O:68]

Participants

8

Reactant 5

HCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 1519165-Phenyl-3-isoxazolecarboxylic acidHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 595595982-Amino-1-[4-(2-trifluoromethyl-5-fluoro-benzoyl)-piperazin-1-yl]-ethanone

Product 1

HCID 251653245-Phenyl-isoxazole-3-carboxylic acid {2-[4-(5-fluoro-2-trifluoromethyl-benzoyl)-piperazin-1-yl]-2-oxo-ethyl}-amideYield 49.1%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
10 °C

Procedure

HOBt (38 mg, 0.28 mmol) and DIPEA (145 mg, 1.12 mmol) were added to a stirred solution of 5-phenyl-isoxazole-3-carboxylic acid (43 mg, 0.22 mmol) in DMF (1.0 mL). Then reaction mass was cooled to 10° C. and EDCI.HCl (54 mg, 0.28 mmol) and 2-amino-1-[4-(5-fluoro-2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethanone (as TFA salt) (100 mg, 0.22 mmol) were added. Then resulting mixture was stirred at the room temperature overnight. The mixture was then diluted with water and the product extracted with ethyl acetate. The organic layer was washed with brine solution, dried over Na2SO4, evaporated and purified by column chromatography using silica gel (60-120 mesh) and 50% ethyl acetate in hexane as the eluant to afford 5-phenyl-isoxazole-3-carboxylic acid {2-[4-(5-fluoro-2-trifluoromethyl-benzoyl)-piperazin-1-yl]-2-oxo-ethyl}-amide as a solid in 49.1% yield. LC-MS purity: 95.66%, 1H NMR (DMSO-D6): δ 8.7 (t, 1H), 7.94 (m, 3H), 7.56 (m, 5H), 7.4 (s, 1H), 4.15 (m, 2H), 3.75 (m, 1H), 3.6 (m, 3H), 3.45 (m, 2H), 3.2 (m, 2H), 3.1 (m, 1H).

Workup

  1. customThen reaction mass
  2. customThen resulting mixture
  3. extractionthe product extracted with ethyl acetate
  4. washThe organic layer was washed with brine solution
  5. dry with materialdried over Na2SO4
  6. customevaporated
  7. custompurified by column chromatography

Sources & evidence

ORD record
ord-cc7bb0ff128649698691457a65e092d6
Source dataset
uspto-grants-2010_11
Patent number
US07842696B2

Reaction notes

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