Synthesis of oligonucleotide–peptide conjugates using hydrazone chemical ligation

An oligonucleotide was functionalized on the solid-phase by a tartaramide moiety, which could be converted efficiently in solution into a glyoxylyl group following a mild periodic oxidation. The glyoxylyl-oligonucleotide was found to be very stable upon storage and was successfully engaged in hydrazone ligation with an α-hydrazino acetyl peptide.