反应详情

温度

56 °C

1 g of trifluoromethanesulfonic acid was added to a solution of 55.2 g (0.1 mole) of 1,3-bis-(4-benzoyl-3-hydroxyphenoxy)-prop-2-yl cyanoacetate in 300 ml of acetone, and the solution was heated for 3 hours at a temperature of 56° C. After cooling to room temperature, the resulting crystalline precipitate was filtered off with suction and recrystallized from acetone. After drying, 51 g (86 percent of theory) of 1,3-bis-(4-benzoyl-3-hydroxyphenoxy)-prop-2-yl 2-cyano-3,3-dimethylacrylate were obtained in the form of colorless crystals having a melting point of 145° to 147° C. and a purity of 99 percent (HPLC). The structure of the compound obtained was confirmed by UV, IR and NMR spectra.

1. temperatureAfter cooling to room temperature
2. filtrationthe resulting crystalline precipitate was filtered off with suction
3. customrecrystallized from acetone
4. customAfter drying