Cyclohex-1-en-1-ylphosphonic acid → Cyclohexene-1-phosphonic acid dichloride

Participants

Reaction Steps

Into a mixture of 57 g of cyclohexene-1-phosphonic acid and 10 g of cyclohexene-1-phosphonic acid dichloride phosgene was introduced at a temperature of from 170°-180°C for 19 hours. At the end of the reaction, nitrogen was blown through the mixture to remove excess phosgene and subsequently the mixture was distilled under reduced pressure. 62 g of cyclohexene-1-phosphonic acid dichloride were obtained, b.p. 75°C under 0.3 mm Hg, corresponding to a yield of 89.5 percent of the theory.

Provenance & Evidence