ChemInform Abstract: The Reaction of Benzoylphosphonic Acid with Thionyl Chloride. The Formation of Benzoylphosphonic Dichloride and P,P′- Dibenzoylpyrophosphonic Dichloride

The reaction of benzoylphosphonic acid (3) with thionyl chloride leads to the formation of benzoylphosphonic dichloride (5) and P,P′-dibenzoylpyrophosphonic dichloride (6). These products were identified by 31P nmr spectra and through their products of alcoholysis with 2-propanol.