反应详情

温度

90 °C

To a solution of 3.76 g of 1-(2-nitrophenyl)pyrrole in 20 ml of N,N-dimethylformamide at 0° C. is added dropwise with stirring 3 ml of phosphorus oxychloride. Stirring is continued for 30 minutes and the reaction mixture is heated at 90° C. for 1 hour. After cooling to room temperature the mixture is treated with crushed ice and the pH adjusted to 12 with 2N sodium hydroxide. The resulting suspension is filtered, washed with water and dried to give 5.81 g of the desired product as a light yellow solid m.p. 119°-122° C.

1. temperatureAfter cooling to room temperature the mixture
2. additionis treated with crushed ice
3. filtrationThe resulting suspension is filtered
4. washwashed with water
5. customdried