反应详情

温度

25 °C

A 45.46 gram portion of 4-(1-(4-aminophenyl)-1-methylethyl)phenol (0.20 mole) and 500 milliliters of acetic acid were added to a reactor and maintained under a nitrogen atmosphere with stirring. The stirred solution was maintained at 25° C., then 19.61 grams of maleic anhydride (0.20 mole) dissolved in 100 milliliters of acetic acid was added to the reactor and heating to a reflux commenced. The 126° C. reflux temperature was maintained for 15 hours (54,000 s), then the product was dried under vacuum by rotary evaporation at 100° C. for 60 minutes (3600 s). The crude product was dissolved in 250 milliliters of o-dichlorobenzene at 120° C. and then cooled to 25° C. The light yellow colored solution was decanted away from a brown colored oil layer and dried under vacuum by rotary evaporation at 100° C. for 60 minutes (3600 s) to provide 31.4 grams of 4-(1-(4-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)phenyl)-1-methylethyl)phenol as a bright yellow colored powder. Infrared spectrophotometric analysis of a film sample of the product confirmed the product structure.

1. temperaturemaintained under a nitrogen atmosphere
2. additionwas added to the reactor
3. temperatureheating to a reflux
4. temperatureThe 126° C. reflux temperature
5. temperaturewas maintained for 15 hours (54,000 s)
6. customthe product was dried under vacuum by rotary evaporation at 100° C. for 60 minutes (3600 s)
7. dissolutionThe crude product was dissolved in 250 milliliters of o-dichlorobenzene at 120° C.
8. temperaturecooled to 25° C
9. customThe light yellow colored solution was decanted away from a brown colored oil layer
10. customdried under vacuum by rotary evaporation at 100° C. for 60 minutes (3600 s)