反应详情

At first, 14.8 g of potassium tert-butoxide and 50 ml of tetrahydrofuran were put in a reaction vessel having a stirrer, a thermometer and a dropping funnel. Under a nitrogen gas flow, a solution in which 9.90 g of the diethyl 2-hydroxybenzylphosphonate and 5.44 g of 4-(N,N-bis(4-methylphenyl)amino)benzaldehyde were dissolved in tetrahydrofuran was slowly dropped therein at room temperature, and the reaction is further performed for 2 hours at the same temperature. Next, water was added thereto while cooling the reaction product with water, a hydrochloric acid solution with a normal concentration of 2 (i.e., 2N) was added therein to acidize the reaction product, and then tetrahydrofuran was removed by an evaporator. Further, toluene was added thereto to extract a crude product with toluene. The toluene phase was washed with water, a sodium hydrogen carbonate solution and a saturated saline in this order, and magnesium sulfate was then added thereto to dehydrate the toluene phase.

1. additionwas slowly dropped
2. concentrationa hydrochloric acid solution with a normal concentration of 2 (i.e., 2N)
3. additionwas added
4. customtetrahydrofuran was removed by an evaporator
5. additionFurther, toluene was added
6. extractionto extract a crude product with toluene
7. washThe toluene phase was washed with water
8. additiona sodium hydrogen carbonate solution and a saturated saline in this order, and magnesium sulfate was then added