Accelerated Polypeptide Synthesis via N-Carboxyanhydride Ring Opening Polymerization in Continuous Flow.

Area of Science:

• Polymer Chemistry
• Materials Science
• Chemical Engineering

Background:

• Polypeptide synthesis is crucial but faces challenges in cost, scalability, and reaction conditions.
• Traditional batch methods for N-carboxyanhydride ring opening polymerization (NCA ROP) are often slow and difficult to scale.
• Developing efficient and scalable synthetic routes for polypeptides is essential for advanced materials applications.

Purpose of the Study:

• To develop a facile and scalable method for NCA ROP using continuous flow technology.
• To investigate the acceleration of NCA ROP kinetics in a silicon microflow reactor.
• To provide an alternative to traditional batch polymerization for producing polypeptide-based materials.

Main Methods:

• N-carboxyanhydride ring opening polymerization (NCA ROP) of Nε-benzyloxycarbonyl-l-lysine (ZLL) and γ-benzyl-l-glutamate (BLG) NCA.
• Utilized primary amine initiators and N,N-dimethylformamide (DMF) as solvent.
• Implemented a silicon microflow reactor for continuous flow polymerization.

Main Results:

• Achieved 92% conversion in 40 minutes using continuous flow, a significant improvement over batch methods (6 hours).
• Demonstrated highly efficient permeation of CO2 through the microflow reactor tubing, enhancing polymerization rates.
• The flow system proved to be a facile and scale-up friendly alternative to batch NCA ROP.

Conclusions:

• Continuous flow NCA ROP offers a streamlined and efficient approach for polypeptide synthesis.
• Microflow reactors enhance polymerization kinetics, overcoming limitations of batch processes.
• This method provides a scalable and cost-effective strategy for producing polypeptide-based materials.