Multifactorial Perspective for Greening Solid-Phase Peptide Synthesis: Rigid Polyacrylate Macroporous Resin in...

Area of Science:

• Green Chemistry
• Organic Synthesis
• Biochemistry

Background:

• Traditional solid-phase peptide synthesis (SPPS) relies heavily on dimethylformamide and polystyrene resins, limiting greener solvent adoption.
• Previous 'greening' efforts focused on single solvent replacement, facing challenges and limitations.

Purpose of the Study:

• To propose an effective strategy for incorporating greener solvents into SPPS.
• To identify resin-solvent combinations that support both coupling and Fmoc deprotection reactions in SPPS.

Main Methods:

• Investigated the role of resin rigidity in SPPS, decoupling it from resin swelling.
• Developed and utilized a novel polyacrylate-based rigid macroporous resin.
• Tested the efficacy of various greener solvents (EtOAc, TEP, 2-MeTHF, acetone, MeCN) as single solvents for peptide synthesis.

Main Results:

• Demonstrated that rigid resins eliminate the critical parameter of resin swelling in SPPS.
• Successfully synthesized small- to medium-sized peptides using a range of greener solvents.
• Expanded the options for greener solvent selection by not requiring resin swelling.

Conclusions:

• The most effective strategy for greener SPPS involves matching rigid resins with appropriate solvents.
• This novel approach enables the use of diverse, environmentally friendly solvents for efficient peptide synthesis.
• The developed polyacrylate resin facilitates greener SPPS, overcoming limitations of previous methods.