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

Participants

Reaction Steps

To a cold (−78° C.) solution of n-butyllithium (25 mL, 2.5M) in tetrahydrofuran (30 mL) was added 1,5-dimethyl-1H-pyrazole (5.0 g) in tetrahydrofuran (20 mL) dropwise via syringe. After 1 hour, cyclohexanone (5.1 g) in tetrahydrofuran (20 mL) was added dropwise and the reaction mixture was allowed to warm to room temperature. The mixture was quenched by the addition of saturated ammonium chloride solution and ethyl acetate. The layers were separated and the aqueous layer was extracted with additional ethyl acetate (twice). The combined organics were dried over Na2SO4, filtered, and concentrated to provide the crude title compound.

Provenance & Evidence