V. A. Al'fonsov

Thermal decomposition of phosphorylated hemimercaptals

The reaction of diphenylchlorophosphine with β,β,β-trichloro-α-hydroxyethyl ethyl sulfide in the presence of triethylamine leads to the formation of α-ethylthio-β,β,β-trichloroethyl diphenylphosphonite. The reaction of diphenylchlorophosphine with dimethyl α-hydroxy-α-propylthiophosphonate in the presence of triethylamine gives α-propylthio-α-dimethylphosphonoethyl diphenylphosphonite. The phosphorylated hemimercaptals obtained are thermally unstable and decompose to S-alkyl diphenylthiophosphonites and the corresponding carbonyl compounds.