Bis(2-chloroethyl) ethenylphosphonate in the diels-alder reaction

The diene synthesis reactions of bis(2-chloroethyl) ethenylphosphonate with 3-methyl-3-thiolene 1,1-dioxide that generates isoprene under the reaction conditions, as well as with 2,3-dimethylbuta-1,3-diene, cyclohexa-1,3-diene, cyclopentadiene, furan, and anthracene are studied. A series of cycloalkenyl-and heterylphosphonates derived from cyclohexene, bicyclooctene, norbornene, oxanorbornene, and 9,10-dihydro-9,10-ethanoanthracene are synthesized.