反应详情

温度

0 °C

To a cold (−78° C.) solution of nBuLi (12.48 mL) in tetrahydrofuran (40 mL) was added a solution of 1,5-dimethyl-1H-pyrazole (3.0 g) in tetrahydrofuran (3 mL) 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 was allowed to warm to 0° C. After stirring for 1 hour, the reaction mixture was diluted with ether (100 mL), washed with water (50 mL) and brine (50 mL), dried over magnesium sulfate, filtered, and concentrated. Purification of the residue by silica gel chromatography, eluting with a gradient of 3% to 25% ethyl acetate in hexanes, gave the title compound.

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. customPurification of the residue by silica gel chromatography
7. washeluting with a gradient of 3% to 25% ethyl acetate in hexanes