Аннотация:New functionalized N-(diphosphonomethyl)-containing peptides were synthesized in high yields by the reaction of tris(trimethylsilyl) phosphite with the appropriate N-formyl-peptides under mild conditions in the presence of an ef ective catalyst, trimethylsilyl trifl ate. A catalytic scheme for the formation of the products was proposed. The resulting compounds are of interest as promising biologically active substances and ef ective ligands.