反应详情

温度

150 °C

A mixture of ethyl 3-((4-bromophenyl)imino)-2-phenylpropanoate (6.18 g, 17.8 mmol, Intermediate 3, step a) and polyphosphoric acid (8.90 g) was heated at 150° C. for 1.5 hours. After cooling to room temperature, 3 N NaOH was added at 4° C. until basic. The solid was filtered, washed with water, and dried under vacuum overnight to give the title compound.

1. temperatureAfter cooling to room temperature
2. filtrationThe solid was filtered
3. washwashed with water
4. customdried under vacuum overnight