P-(4-Chlorophenyl)phosphonic acid → Phosphonic dichloride, (4-chlorophenyl)-

Participants

Reaction Steps

Into a mixture of 67 g of p-chlorophenylphosphonic acid and 20 g of p-chlorophenylphosphonic acid dichloride phosgene was introduced at a temperature of from 180°-190°C for 20 hours. After blowing through nitrogen to remove excess phosgene the mixture was distilled under reduced pressure. 66 g of p-chlorophenylphosphonic acid dichloride were obtained corresponding to a yield of 84 percent of the theory.

Provenance & Evidence