反应详情

温度

100 °C

DMF (0.807 mL, 10.4 mmol) was added to phosphorous oxychloride (8.10 mL, 86.9 mmol), and the reaction mixture was stirred for 15 min. 6-bromobenzo[d]thiazol-2(3H)-one (2.00 g, 8.69 mmol) was added and the reaction mixture was heated to 100° C. overnight. Upon cooling to rt, the reaction mixture was slowly added to a solution of K2CO3 (75 g) in water (200 mL) while maintaining the temperature below 35° C. Additional K2CO3 was added in order to maintain the pH above 10. Upon complete addition, the mixture was allowed to stir for 1 h. The solid was collected by filtration, washed with water (2×25 mL), and air dried. Further drying in a vacuum oven gave 2.06 g (95%) of the desired product as a brown solid. The material was used without further purification. LC-MS: RT=9.94 min., compound does not ionize.

1. temperatureUpon cooling to rt
2. temperaturewhile maintaining the temperature below 35° C
3. temperatureto maintain the pH above 10
4. additionUpon complete addition
5. stirringto stir for 1 h
6. filtrationThe solid was collected by filtration
7. washwashed with water (2×25 mL), and air
8. customdried
9. customFurther drying in a vacuum oven