反应详情

At first, 14.9 g of the 2-hydroxy-4′-(N,N-bis(4-methylphenyl)amino)stilbene, 100 ml of tetrahydrofuran and 21.5 g of a 12% sodium hydrogen carbonate solution were put in a reaction vessel having a stirrer, a thermometer and a dropping funnel. Under a nitrogen gas flow, 5.17 g of acrylic acid chloride was dropped therein over 30 min at 5° C., and the reaction was further performed for 3 hours at the same temperature. The reaction liquid was put in water, and the mixture was subjected to extraction with toluene, condensation and column-refinement with a silica gel to prepare a crude product. The crude product was then recrystallized with ethanol. Thus, 13.5 g of a yellow needle-form crystal 4′-(N,N-bis(4-methylphenyl)amino)stilbene-2-yl acrylate (compound No. 105 listed before) having a boiling point of 104.1 to 105.2° C. was prepared at a yield of 79.8%.

1. waitthe reaction was further performed for 3 hours at the same temperature
2. customThe reaction liquid
3. extractionthe mixture was subjected to extraction with toluene, condensation and column-refinement with a silica gel
4. customto prepare a crude product
5. customThe crude product was then recrystallized with ethanol
6. customwas prepared at a yield of 79.8%