反应详情

80.6 g (292 mmol) of ethyl 5-methylsulfonylamino-2-fluorocarbanilate was dissolved in a mixture of 1075 ml of acetic acid and 100 ml of water, and chlorine gas was added to the resultant solution at a temperature of not higher than 25° C. until the starting material disappeared. After the reaction was completed, the surplus chlorine gas was removed by blowing nitrogen gas thereinto, and hexane was added. The precipitates crystals were filtered out to obtain 81.4 g of the objective product (yield: 90%) in the form of yellow crystals.

1. customthe surplus chlorine gas was removed
2. additionhexane was added
3. filtrationThe precipitates crystals were filtered out