Cyclohexanone, 3,3-dimethyl- → 3,3-dimethyl-1-((5-methyl-1H-pyrazol-1-yl)methyl)cyclohexanol

HRID 1778900Notes

Reaction equation

HRID 1778900 reaction equation
C([Li])CCC.[CH3:6][N:7]1[C:11]([CH3:12])=[CH:10][CH:9]=[N:8]1.[CH3:13][C:14]1([CH3:21])[CH2:19][CH2:18][CH2:17][C:16](=[O:20])[CH2:15]1>O1CCCC1.CCOCC>[CH3:13][C:14]1([CH3:21])[CH2:19][CH2:18][CH2:17][C:16]([CH2:6][N:7]2[C:11]([CH3:12])=[CH:10][CH:9]=[N:8]2)([OH:20])[CH2:15]1

Participants

6

Reactant 3

HCID 76322Cyclohexanone, 3,3-dimethyl-HCID 1365021,5-DimethylpyrazoleHCID 178418339Butyllithium

Product 1

HCID 866813303,3-dimethyl-1-((5-methyl-1H-pyrazol-1-yl)methyl)cyclohexanol

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 8028TetrahydrofuranSolvent3×

Conditions

Temperature
0 °C

Procedure

A solution of n-butyllithium (2.5 M, 12.48 mL) in tetrahydrofuran (40 mL) was cooled to −78° C. and a solution of 1,5-dimethyl-1H-pyrazole (3.00 g) in tetrahydrofuran (3 mL) was added dropwise. After stirring for 1 hour, a solution of 3,3-dimethylcyclohexanone (3.94 g) in tetrahydrofuran (3 mL) was added dropwise and the reaction allowed to warm to 0° C. After stirring for 1 hour, the reaction was diluted with ether (100 mL), washed with water (50 mL) and brine (50 mL), dried over magnesium sulfate, filtered, and concentrated. Silica gel chromatography eluting with a gradient of 3% to 25% ethyl acetate/hexanes provided the title compound.

Workup

  1. stirringAfter stirring for 1 hour
  2. washwashed with water (50 mL) and brine (50 mL)
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. washSilica gel chromatography eluting with a gradient of 3% to 25% ethyl acetate/hexanes

Sources & evidence

ORD record
ord-d69ad8f2d9634216ac88ff3e3aec673c
Source dataset
uspto-grants-2016_02
Patent number
US09266877B2

Reaction notes

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