T. Kawashima et al., SYNTHESIS AND THERMOLYSIS OF TETRACOORDINATE 1,2-OXAPHOSPHETANES STABILIZED BY STERIC PROTECTION, Chemistry Letters, (8), 1994, pp. 1487-1490
The title compounds bearing a 2,4,6-triisopropylphenyl group stable in
air at room temperature were synthesized in good yields by intramolec
ular dehydration of the corresponding beta-hydroxy phosphinic acids. T
hermolysis gave the corresponding olefin along with ring-opening produ
cts. Selectivity of olefin formation depends on additives.