反应详情

温度

-70 °C

1,3-Diethyl-1H-indazole-6-carboxylic acid methoxy-methyl-amide (0.22 g, 0.86 mmol) was dissolved in tetrahydrofuran (8 mL) and cooled to −70° C. Methylmagnesium chloride (2 mL, 3M in tetrahydrofuran, 0.06 mol) was added dropwise and the resulting mixture was stirred for 30 minutes at −70° C. After warming to room temperature, the mixture was stirred for a further 3 minutes, then quenched by the addition of a chilled saturated solution of ammonium chloride. Ethyl acetate (150 mL) and water (40 mL) were then added and the product was extracted. The aqueous layer was re-extracted with ethyl acetate (75 mL). The organic layers were combined, dried, filtered, and concentrated to afford 200 mg of 1-(1,3-Diethyl-1H-indazol-6-yl)-ethanone.

1. temperatureAfter warming to room temperature
2. stirringthe mixture was stirred for a further 3 minutes
3. customquenched by the addition of a chilled saturated solution of ammonium chloride
4. additionEthyl acetate (150 mL) and water (40 mL) were then added
5. extractionthe product was extracted
6. extractionThe aqueous layer was re-extracted with ethyl acetate (75 mL)
7. customdried
8. filtrationfiltered
9. concentrationconcentrated