Sulfuric Acid → HCID 10275412, compound

HRID 2222605Notes

Reaction equation

HRID 2222605 reaction equation
[F:1][C:2]1[CH:7]=[C:6]([N:8]2[CH:13]=[CH:12][CH:11]=[CH:10][C:9]2=[O:14])[CH:5]=[CH:4][C:3]=1[CH2:15][C:16]([C:18]1[N:22]([C:23]2[CH:28]=[CH:27][C:26]([O:29][CH3:30])=[CH:25][CH:24]=2)[N:21]=[C:20]([C:31]#[N:32])[CH:19]=1)=[O:17].S(O)(O)(=O)=[O:34].C(OCC)(=O)C>O>[F:1][C:2]1[CH:7]=[C:6]([N:8]2[CH:13]=[CH:12][CH:11]=[CH:10][C:9]2=[O:14])[CH:5]=[CH:4][C:3]=1[CH2:15][C:16]([C:18]1[N:22]([C:23]2[CH:24]=[CH:25][C:26]([O:29][CH3:30])=[CH:27][CH:28]=2)[N:21]=[C:20]([C:31]([NH2:32])=[O:34])[CH:19]=1)=[O:17]

Participants

5

Reactant 3

HCID 1118Sulfuric AcidHCID 8857Ethyl AcetateHCID 22240395HCID 22240395, compound

Product 1

HCID 10275412HCID 10275412, compoundYield 41%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

Part I. To 5-{[2-fluoro-4-(2-oxo-1(2H)-pyridinyl)-phenyl]acetyl}-1-(4-methoxyphenyl)-1H-pyrazole-3-carbonitrile (75 mg, 0.175 mmol) was added concentrated aqueous dihydrogen sulfate (4.5 mL). After 2 h, the reaction was poured into ethyl acetate (50 mL) and water (50 mL), and the layers were separated. The organic layer was washed with saturated aqueous sodium chloride (50 mL), dried over sodium sulfate, and concentrated to dryness. The resulting residue was purified by radial chromatography (2% methyl alcohol in dichloromethane) to afford 5-{[2-fluoro-4-(2-oxo-1(2H)-pyridinyl)phenyl]acetyl}-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxamide (32 mg, 41%) as a white solid upon lyopholization from 10% acetonitrile in water. LC/MS (ESI+): 448.2 (M+H)+. 1H NMR (CD3OD) δ 7.70 (s, 1H), 7.60 (m, 2H), 7.43 (t, 1H), 7.16-7.32 (m, 4H), 6.97 (d, 2H), 6.60 (d, 1H), 6.45 (t, 1H), 4.40 (s, 2H), 3.83 (s, 3H).

Workup

  1. customthe layers were separated
  2. washThe organic layer was washed with saturated aqueous sodium chloride (50 mL)
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated to dryness
  5. customThe resulting residue was purified by radial chromatography (2% methyl alcohol in dichloromethane)

Sources & evidence

ORD record
ord-e923e185ade04c2e8d5a750a30de3884
Source dataset
uspto-grants-2008_05
Patent number
US07371761B2

Reaction notes

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