反应详情

To a solution of 8 g (121.2 mmol) of phosphonous acid in 30 ml of anhydrous ethanol, cooled to 0° C., are added dropwise 22.21 g (121.2 mmol) of diphenylmethylamine, while taking care to ensure that the temperature does not exceed 25° C. After addition, a white precipitate forms, to which 200 ml of diethyl ether are added. The precipitate is filtered off, rinsed with diethyl ether and then dried. 22.66 g of product are recovered (yield=98.2%).

1. customdoes not exceed 25° C
2. additionAfter addition
3. filtrationThe precipitate is filtered off
4. washrinsed with diethyl ether
5. customdried
6. custom22.66 g of product are recovered (yield=98.2%)