Reactions of?-chloroethyl derivatives of tricoordinated phosphorus acids with 1-nitro-1-propene

The reactions of theβ-chloroethyl derivatives of trivalent phosphorus acids proceed via an ionic intermediate, which, depending on the experimental conditions, is stabilized in the direction of ring closure to give an adduct with a pentacovalent phosphorus atom and the formation of the corresponding unsaturated and (α-methyl-β-nitroethyl)phosphoryl compounds. The liberatedβ-chloroethyl nitrite functions as an oxidizing agent of the startingβ-chloroethyl derivatives of trivalent phosphorus acids.