反应详情

4-(p-Chlorophenyl)phenol is converted via the Duff reaction [J. Chem. Soc., 547 (1941)] to 2-hydroxy-5-(p-chlorphenyl)benzaldehyde, mp. 74°-78° C. i.r. 6.02μ. A solution of 233 mg. (1 mmole) of this aldehyde, 0.4 ml. (2.63 mmole) of diethylmalonate and 0.2 ml. (2 mmole) of piperidine is heated for 10 minutes and kept at 25° C. for 2 hours. Then 5 ml. of 9 N HCl is added and the mixture stirred at reflux overnight. The mixture is cooled in an ice bath and filtered to yield 238 mg. of the desired compound, i.r. 5.74, 5.9μ.

1. temperatureat reflux overnight
2. temperatureThe mixture is cooled in an ice bath
3. filtrationfiltered
4. customto yield 238 mg