Аннотация:Convenient syntheses of functionalized hydroxymethyl-substituted organophosphorus acids and their derivatives have been developed. Trimethylsilyl esters of trivalent phosphorus acids react with various aldehydes and ketones to give new hydroxymethyl-substituted phosphonous, phosphonic and phosphinic acids with P—C—O units. The resulting compounds are of interest as promising biologically active substances, water-soluble polydentate ligands, and effective extractants.