Water → [5-tert-Butyl-1-(4-methanesulfonyl-phenyl)-1H-pyrazol-3-yl]-methanol

HRID 508614Notes

Reaction equation

HRID 508614 reaction equation
C([O:3][C:4]([C:6]1[CH:10]=[C:9]([C:11]([CH3:14])([CH3:13])[CH3:12])[N:8]([C:15]2[CH:20]=[CH:19][C:18]([S:21]([CH3:24])(=[O:23])=[O:22])=[CH:17][CH:16]=2)[N:7]=1)=O)C.[H-].[H-].[H-].[H-].[Li+].[Al+3].CCOC(C)=O.O>C1COCC1>[C:11]([C:9]1[N:8]([C:15]2[CH:20]=[CH:19][C:18]([S:21]([CH3:24])(=[O:22])=[O:23])=[CH:17][CH:16]=2)[N:7]=[C:6]([CH2:4][OH:3])[CH:10]=1)([CH3:14])([CH3:12])[CH3:13]

Participants

6

Reactant 4

HCID 962WaterHCID 8857Ethyl AcetateHCID 21226445Aluminium lithium hydrideHCID 596493465-tert-Butyl-1-(4-methanesulfonyl-phenyl)-1H-pyrazole-3-carboxylic acid ethyl ester

Product 1

HCID 67992518[5-tert-Butyl-1-(4-methanesulfonyl-phenyl)-1H-pyrazol-3-yl]-methanolYield 80%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of compound 3h (0.8 g, 2.28 mmol) in 25 mL of THF was added LiAlH4 (0.14 g, 3.65 mmol). The reaction mixture was stirred for 6 hours at room temperature. EtOAc (50 mL) and water (50 mL) were added successively. The solvent was removed in vacuo and the resulting solid was filtered. The crude product was purified by column chromatography (EtOAc/Hexanes=7/3) to give the titled compound (0.56 g, 80% yield) as a white solid. mp 143.0-146.5° C. 1H NMR (300 MHz, DMSO-d6): δ 8.06 (d, J=8 Hz, 2H), 7.68 (d, J=8 Hz, 2H), 6.26 (s, 1H), 5.10 (t, J=6 Hz, 1H), 4.39 (d, J=6 Hz, 2H), 3.32 (s, 3H), 1.14 (s, 9H).

Workup

  1. customThe solvent was removed in vacuo
  2. filtrationthe resulting solid was filtered
  3. customThe crude product was purified by column chromatography (EtOAc/Hexanes=7/3)

Sources & evidence

ORD record
ord-353e906e78b3443abb071195ef27aa62
Source dataset
uspto-grants-2015_08
Patent number
US09096532B2

Reaction notes

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