Reaction of Dimethyl 1-Hydroxyalkylphosphonates with Some Chlorides

The reactions of dimethyl 1-hydroxycycloalkylphosphonates having a five- to seven-membered ring with sulfuryl chloride and phosphorus pentachloride afforded olefinic and/or dichloro derivatives of phosphonates. The mechanism of the formation of new dichloro derivatives and the reactions of dimethyl 1-methylethylphosphonate with sulfuryl chloride and phosphorus pentachloride were also investigated.