反应详情

温度

-30 °C

3,4-Dichlorophenol (2.35 g) was dissolved in anhydrous dichloromethane (50 ml) at room temperature under an atmosphere of argon. The mixture was cooled to −30° C. and diphosgene (3.92 g) and N,N-Diisopropylethylamine (2.51 ml) were added slowly in the order specified. The resulting solution was then stirred at 0° C. for 3 hours, then at room temperature for 18 hours and finally at reflux for 2 hours. The solution volume was measured and used accordingly.

1. waitat room temperature for 18 hours
2. temperaturefinally at reflux for 2 hours