4-Fluorobenzoic Acid → 4-fluoro-N-(1-(3-(trifluoromethyl)phenylsulfonyl)piperidin-4-yloxy)benzamide

HRID 1895901Notes

Reaction equation

HRID 1895901 reaction equation
[F:1][C:2]([F:21])([F:20])[C:3]1[CH:4]=[C:5]([S:9]([N:12]2[CH2:17][CH2:16][CH:15]([O:18][NH2:19])[CH2:14][CH2:13]2)(=[O:11])=[O:10])[CH:6]=[CH:7][CH:8]=1.ON1C2C=CC=CC=2N=N1.[F:32][C:33]1[CH:41]=[CH:40][C:36]([C:37](O)=[O:38])=[CH:35][CH:34]=1.C(N(CC)C(C)C)(C)C>CN(C)C=O>[F:32][C:33]1[CH:41]=[CH:40][C:36]([C:37]([NH:19][O:18][CH:15]2[CH2:14][CH2:13][N:12]([S:9]([C:5]3[CH:6]=[CH:7][CH:8]=[C:3]([C:2]([F:1])([F:20])[F:21])[CH:4]=3)(=[O:11])=[O:10])[CH2:17][CH2:16]2)=[O:38])=[CH:35][CH:34]=1

Participants

6

Reactant 4

HCID 99734-Fluorobenzoic AcidHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 67118429O-(1-(3-(trifluoromethyl)phenylsulfonyl)piperidin-4-yl)hydroxylamine

Product 1

HCID 445532904-fluoro-N-(1-(3-(trifluoromethyl)phenylsulfonyl)piperidin-4-yloxy)benzamideYield 81%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

1-(3-Dimethylaminopropyl)-3-ethylcarboiimide hydrochloride (138 mg, 0.72 mmol) was added to a solution of O-(1-(3-(trifluoromethyl)phenylsulfonyl)piperidin-4-yl)hydroxylamine (195 mg, 0.60 mmol), 1-hydroxybenzotriazole (97.0 mg, 0.72 mmol), 4-fluorobenzoic acid (84.0 mg, 0.60 mmol) and N,N-diisopropylethylamine (233 mg, 1.80 mmol) in N,N-dimethylformamide (8 ml). The reaction mixture was stirred at room temperature for 17 hours and quenched with H2O (50 ml) and aqueous 1 N HCl solution (pH=3). The aqueous phase was extracted with CH2Cl2 (20 ml×3) and the combined organic phase was washed with aqueous NaHCO3 solution and brine, dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified by column chromatography (ethyl acetate/petroleum ether: 50/50) to give 4-fluoro-N-(1-(3-(trifluoromethyl)phenylsulfonyl)piperidin-4-yloxy)benzamide (217 mg, 81%) as a white solid: LCMS: 447 [M+1]+. 1H NMR (DMSO-d6) δ: 1.71 (m, 2H), 1.88 (m, 2H), 3.07 (m, 4H), 3.97 (t, 1H), 7.27 (t, 2H), 7.74 (m, 2H), 7.98 (m, 2H), 8.10 (m, 2H), 11.4 (s, 1H).

Workup

  1. customquenched with H2O (50 ml) and aqueous 1 N HCl solution (pH=3)
  2. extractionThe aqueous phase was extracted with CH2Cl2 (20 ml×3)
  3. washthe combined organic phase was washed with aqueous NaHCO3 solution and brine
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified by column chromatography (ethyl acetate/petroleum ether: 50/50)

Sources & evidence

ORD record
ord-5064ca088829443195395655d8c655c4
Source dataset
uspto-grants-2013_08
Patent number
US08518934B2

Reaction notes

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