A MILD AND FACILE SYNTHESIS OF ALKYL- AND ARYLPHOSPHONYL DICHLORIDES UNDER NEUTRAL CONDITIONS. REACTION OF BIS(TRIMETHYLSILYL) PHOSPHONATES WITH PCl5
Bis(trimethylsilyl) phosphonates, which are prepared from the dialkyl esters with chlorotrimethylsilane/sodium iodide, are transformed in high yields into the corresponding phosphonyl dichlorides on the treatment with phosphorus pentachloride under mild and neutral conditions.