Solid-phase synthesis of phenylalanine containing peptides using a traceless triazene linker

Area of Science:

• Organic Chemistry
• Polymer Chemistry
• Biochemistry

Background:

• Solid-phase peptide synthesis (SPPS) is crucial for producing peptides.
• Developing new anchoring strategies can improve SPPS efficiency and peptide diversity.
• Existing methods may have limitations in handling complex peptide structures.

Purpose of the Study:

• To introduce and validate a novel triazene linkage for anchoring phenylalanine in SPPS.
• To demonstrate the versatility of this method for synthesizing various bioactive peptides.
• To assess the efficiency and purity of peptides synthesized using this approach.

Main Methods:

• Utilizing a triazene function to attach phenylalanine to a polymeric support via its side chain.
• Employing Fmoc-Phe(pNH(2))-OAllyl diazonium salt coupling to a functionalized MBHA-polystyrene resin.
• Peptide chain assembly, cleavage using trifluoroacetic acid (TFA), and reduction of the diazonium salt.

Main Results:

• Successful synthesis of several bioactive peptides, including cyclic, C-modified, and protected variants.
• High purity (73-94%) of the final peptide products achieved.
• Demonstrated the utility of the triazene linkage for complex peptide synthesis.

Conclusions:

• The triazene linkage strategy is effective for solid-phase peptide synthesis.
• This method provides a robust route to diverse and complex peptide structures.
• The approach yields high-purity peptides, suitable for various applications.