1-(4-Fluoro-3-cyanophenyl)-3-trifluoromethyl-5-hydroxymethylpyrazole → 1-(3-Cyano-4-fluorophenyl)-3-trifluoromethyl-5-hydroxycarbonylpyrazole

HRID 1071474Notes

Reaction equation

HRID 1071474 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:12]([CH2:13][OH:14])=[CH:11][C:10]([C:15]([F:18])([F:17])[F:16])=[N:9]2)=[CH:4][C:3]=1[C:19]#[N:20].I([O-])(=O)(=O)=[O:22].[Na+]>C(#N)C.O.[Ru](Cl)(Cl)Cl>[F:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:12]([C:13]([OH:22])=[O:14])=[CH:11][C:10]([C:15]([F:17])([F:16])[F:18])=[N:9]2)=[CH:4][C:3]=1[C:19]#[N:20]

Participants

6

Reactant 2

HCID 222807401-(4-Fluoro-3-cyanophenyl)-3-trifluoromethyl-5-hydroxymethylpyrazoleHCID 23667635Sodium periodate

Product 1

HCID 104700071-(3-Cyano-4-fluorophenyl)-3-trifluoromethyl-5-hydroxycarbonylpyrazoleYield 57.1%

Reagents, catalysts & solvents 3

HCID 61850Ruthenium trichlorideCatalystHCID 962WaterSolventHCID 6342AcetonitrileSolvent

Procedure

To a solution of 1-(4-fluoro-3-cyanophenyl)-3-trifluoromethyl-5-hydroxymethylpyrazole (0.45 g, 1.58 mmol) in acetonitrile (10 mL) was added catalytic amount of ruthenium chloride at 0° C. followed by addition of a solution sodium periodate (0.71 g, 3.32 mmol) in water. The reaction was stirred at 0° C. to room temperature overnight. The next day the acetonitrile was evaporated and the residue was partitioned between ethyl acetate and water, washed with brine, dried over sodium sulfate, filtered and concentrated to give 1-(4-fluoro-3-cyanophenyl)-3-trifluoromethyl-5-hydroxycarbonylpyrazole (0.27 g, 57% yield) as pure compound: MS (ES−): 298 (M−H)− (40%).

Workup

  1. customThe next day the acetonitrile was evaporated
  2. customthe residue was partitioned between ethyl acetate and water
  3. washwashed with brine
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-f1363f17a26e421e8935d55df34720e2
Source dataset
uspto-grants-2005_06
Patent number
US06906070B2

Reaction notes

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