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Abstract
New phosphonate mono-methyl esters which are designed to have properties intermediate between the acid and the diesters and thus able to form discrete metal complexes with enhanced solubility in water, were synthesized using 2-(2-aminoethyl) pyridine as starting reagent, considering that the presence of the pyridyl moiety in such aminophosphonates could be of great relevance for preparation of discrete metal complexes. The procedure used allowed to obtain in rather good yields the phosphonic acid mono-methyl esters directly in a one-pot synthesis starting from the corresponding Schiff bases (not isolated) and dimethyl phosphite.