反应详情

温度

80 °C

900 mg (4 mmol) of 2-chloro-4-cyanobenzenesulfonic acid chloride is dissolved in 3 mL of pyridine and, after the addition of 0.5 mL (5.8 mmol) of pyrrolidine, stirred for one hour at 80° C. Then the mixture is cooled, mixed with ice, and adjusted to pH 5-6 with 1 molar hydrochloric acid. The precipitate formed is suction filtered, washed with water and dried. Yield: 1.1 g (100% of theory); Rf value: 0.20 (silica gel; petroleum ether/ethyl acetate=4:1).

1. temperatureThen the mixture is cooled
2. additionmixed with ice
3. customThe precipitate formed
4. filtrationfiltered
5. washwashed with water
6. customdried