Synthesis of lipopeptides using hydrazone chemical ligation

Abstract
In this paper we report that a hydrazinopeptide synthesized using solid‐phase N‐electrophilic amination with N‐Boc‐3‐(4‐cyanophenyl)oxaziridine reacted with a lipophilic peptide aldehyde to give the corresponding hydrazone plus an unexpected 1,3,4‐oxadiazolidinopeptide containing two peptide aldehyde units. This methodology allows the synthesis of large lipopeptides.