反应详情

温度

155 °C

A mixture of p-nitrophenylacetic acid (51.23 g, 0.28 mol) and 3,4-dichlorobenzaldehyde (49.50 g, 0.28 mol) in piperidine (50 mL) was heated to 150-160° C. for 5 hours under a N2 atmosphere. After cooling the reaction mixture, the precipitate was triturated in boiling methanol (MeOH) (50 mL) and then cooled to −5° C. for 12 hours. The crystalline precipitate was filtered off, rinsed with cold MeOH and dried at room temperature in a vacuum oven overnight to yield an orange solid, 22.71 g (0.077 mol, 27%) of the desired product.

1. temperatureAfter cooling the reaction mixture
2. customthe precipitate was triturated
3. temperaturecooled to −5° C. for 12 hours
4. filtrationThe crystalline precipitate was filtered off
5. washrinsed with cold MeOH
6. customdried at room temperature in a vacuum oven overnight