An efficient and convenient approach to the condensation reaction of aromatic aldehydes and diethyl phosphite using Na2CO3 as catalyst with grinding at room temperature (without any solvent) is described. This method provides several advantages such as neutral condition, simple work-up procedure, high yields and reduced environmental impact.

Diethyl tosyloxybenzylphosphonate was synthesized by the reaction of hydroxybenzylphosphonate with p-toluenesulfonyl chloride characterized by NMR spectroscopy, elemental analyses and X-ray single-crystal diffraction. The possessing parameters: m.f. C18H23O6PS,