反应详情

In a 500 ml round bottomed flask was suspended 55 g of 3-(4-chlorophenyl)-4-phenyl-4,5-dihydro-1H-pyrazole in 250 ml of diethyl ether. The suspension was warmed to reflux and 33 g of 4-chlorophenyl isocyanate was added at a rate to maintain reflux. After cooling and standing overnight the precipitated product was filtered yielding 78 g of white solid. mp 173°-175° C.

1. customIn a 500 ml round bottomed flask was suspended
2. temperatureThe suspension was warmed
3. temperatureto reflux
4. temperatureto maintain
5. temperaturereflux
6. temperatureAfter cooling
7. filtrationthe precipitated product was filtered