Methyl iodide → 3-(2,5-Dimethyl-pyrrol-1-yl)-1-methyl-5-(2,2,2-trifluoro-1-methoxy-1-methyl-ethyl)-1H-pyrazole

HRID 884616Notes

Reaction equation

HRID 884616 reaction equation
[CH3:1][C:2]1[N:3]([C:8]2[CH:9]=[C:10]([C:14]([OH:20])([CH3:19])[C:15]([F:18])([F:17])[F:16])[N:11]([CH3:13])[N:12]=2)[C:4]([CH3:7])=[CH:5][CH:6]=1.[H-].[Na+].[CH3:23]I>C1COCC1>[CH3:7][C:4]1[N:3]([C:8]2[CH:9]=[C:10]([C:14]([O:20][CH3:23])([CH3:19])[C:15]([F:18])([F:17])[F:16])[N:11]([CH3:13])[N:12]=2)[C:2]([CH3:1])=[CH:6][CH:5]=1

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 593945082-[5-(2,5-Dimethyl-pyrrol-1-yl)-2-methyl-2H-pyrazol-3-yl]-1,1,1-trifluoro-propan-2-ol

Product 1

HCID 593943523-(2,5-Dimethyl-pyrrol-1-yl)-1-methyl-5-(2,2,2-trifluoro-1-methoxy-1-methyl-ethyl)-1H-pyrazole

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 2-[5-(2,5-dimethyl-pyrrol-1-yl)-2-methyl-2H-pyrazol-3-yl]-1,1,1-trifluoro-propan-2-ol (0.5 g, 1.7 mmol) in THF (10 mL) at 0° C., sodium hydride (0.21 g, 60%, 5.2 mmol) is added, and the mixture is stirred for 10 min followed by the addition of methyl iodide (0.22 mL, 3.5 mmol). The ice bath is removed and the reaction mixture is stirred at room temperature for 5 hour, poured into water, separated, and the water layer is extracted with DCM. The organic layers are combined and concentrated. The residue is purified by FCC to give the title compound. MS (ESI) m/z 302.0 (M+1).

Workup

  1. customThe ice bath is removed
  2. stirringthe reaction mixture is stirred at room temperature for 5 hour
  3. additionpoured into water
  4. customseparated
  5. extractionthe water layer is extracted with DCM
  6. concentrationconcentrated
  7. customThe residue is purified by FCC

Sources & evidence

ORD record
ord-bf7735cd067e45b78a109ed73a644ee4
Source dataset
uspto-grants-2012_08
Patent number
US08242125B2

Reaction notes

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