反应详情

2.36 g of N-(3-amino-5-trifluoromethyl-2-pyridyl)ethanesulfonamide was dissolved in 24 ml of dry tetrahydrofuran, and 1.54 g of cyclohexanecarbonyl chloride was dropwise added thereto under cooing with ice. After the dropwise addition, the mixture was stirred for one hour and further reacted at room temperature overnight. After completion of the reaction, the solvent was distilled off under reduced pressure, the obtained crystals were washed with ethyl ether to obtain 2.94 g of the desired product having a melting point of from 153° to 155° C.

1. additionAfter the dropwise addition
2. customfurther reacted at room temperature overnight
3. customAfter completion of the reaction
4. distillationthe solvent was distilled off under reduced pressure
5. washthe obtained crystals were washed with ethyl ether