1 A catalytic process for hydrophosphonylation of aldehydes with H 6 P 2 W 18 O 62 •14H 2 O has been developed in this paper. Various aldehydes were reacted with diethylphosphite in the presence of 1 % of heteropolyacids (HPAs) as a catalyst to generate the α-hydroxyphosphonates. All the synthesized compounds were sys tematically characterized by IR, 1 H NMR, 13 C NMR, and 31 P NMR. Simple and mild method, short reaction time, solvent-free conditions, availability and reusability of the catalyst are the main advantages of this procedure.
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