反应详情

A mixture of 16.08 g of 1-(3-chloro-2-pyridinyl)-3-trifluoromethyl-1H-pyrazole-5-carboxylic acid and 12 ml of thionyl chloride was heated to reflux for 2 hours. The reaction mixture was allowed to cool to room temperature and subjected to distillation under reduced pressure (125° C./3 mmHg) to obtain 14.2 g of 1-(3-chloro-2-pyridinyl)-3-trifluoromethyl-1H-pyrazole-5-carbonyl chloride of the formula:

1. temperaturewas heated
2. temperatureto reflux for 2 hours
3. distillationsubjected to distillation under reduced pressure (125° C./3 mmHg)