In some cases, an epoxide is used instead of the alcohol; or an acid halide or anhydride replaces the acid. Less often, an alkyl or aryl halide is treated with a carboxylate salt. But these methods ...

provide a convenient route to the synthesis of alkylphosphonic dichlorides from the complex formed by combination of an alkyl halide, phosphorus trichloride, and aluminium chloride 2. It has since ...