Microwave technology, in conjunction with the isopeptide strategy including Fmoc-based solid-phase peptide synthesis (SPPS), was used to establish a methodology for time-efficient synthesis of peptides containing difficult sequences. A model difficult sequence-containing peptide (8QSer) was synthesized through this method in 1 day, representing a tenfold reduction in synthesis time compared to the isopeptide method combined with classical SPPS.
Keywords: Depsipeptide; Difficult sequence; Isodipeptide unit; Microwave; O-N acyl migration; Solid-phase peptide synthesis.