Straightforward, scalable, solution-phase synthesis of peptide bonds in flow

Area of Science:

• Organic Chemistry
• Chemical Engineering
• Biotechnology

Background:

• Solution-phase peptide synthesis traditionally involves batch processes, which can be challenging for scaling and automation.
• Developing continuous flow methods offers potential advantages in efficiency, safety, and reproducibility for peptide manufacturing.

Purpose of the Study:

• To establish simple, scalable solution-phase flow conditions for peptide synthesis.
• To demonstrate the utility of in-situ activation as mixed anhydrides within a flow chemistry framework.
• To synthesize a gram-scale quantity of a key peptide precursor for a bioactive cyclic peptide.

Main Methods:

• Development of in-situ activation using mixed anhydrides in a flow reactor.
• Synthesis of various dipeptides under plug flow conditions.
• Optimization and application of continuous flow conditions for gram-scale production.

Main Results:

• Successful implementation of a simple solution-phase flow synthesis for peptides.
• Preparation of diverse dipeptides showcasing the versatility of the method.
• Gram-scale synthesis of the linear hexapeptide precursor for segetalin A was achieved.

Conclusions:

• The developed flow conditions provide a valuable addition to the synthetic toolbox for solution-phase peptide synthesis.
• The approach is scalable and suitable for producing complex peptide precursors efficiently.
• This work highlights the potential of flow chemistry in advancing peptide manufacturing.