反应详情

温度

2.5 °C

A solution of 368 mg (1.0 mmol) of [1-(2,6-dichloro-4-trifluoromethylphenyl)-3,5-diethyl-1H-pyrazol-4-yl]methanol in 10 mL of methylene chloride and 0.2 mL (2.5 mmol) of triethylamine was cooled to 0-5° C. To this was added 0.92 mL (1.2 mmol) of methanesulfonyl chloride and the reaction mixture was stirred at 0-5 ° C. for 15 minutes. Then 1 mL of acetonitrile and 1 mL of dimethylformamide was added and the reaction mixture was heated at reflux overnight. The cooled reaction mixture was taken up with water and with ethyl acetate and the organic extracts were dried and evaporated to an orange oil which was purified by flash chromatography to give the desired product in 45% yield. 1H-NMR (CDCl3) δ0.86 (3H, t, J=7), 1.21 (3H, t, J=7), 2.28 (2H, q, J=7), 2.60 (2H, q, J=7), 2.92-3.04 (1H, m), 3.20-3.32 (1H, m), 3.50-3.90 7H, m), 6.90-7.24 (4H, m), 7.68 (2H, s).

1. temperaturethe reaction mixture was heated
2. temperatureat reflux overnight
3. customThe cooled reaction mixture
4. customthe organic extracts were dried
5. customevaporated to an orange oil which
6. customwas purified by flash chromatography