Synthesis of peptidomimetics using a polymer-bound Boc-linker

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Peptide Chemistry

Background:

• Peptide mimetics are crucial in drug discovery for mimicking peptide structures with improved stability and bioavailability.
• Solid-phase synthesis offers advantages in efficiency and purification for complex molecule construction.
• Developing versatile synthons for peptidomimetic synthesis remains an active area of research.

Purpose of the Study:

• To develop a solid-phase synthesis route for Boc-resin-bound alpha-hydroxy-beta-amino-aldehydes.
• To investigate the conversion of these intermediates into diverse peptide mimetics.
• To showcase the utility of Dondoni's C1-homologation in solid-phase peptide mimetic synthesis.

Main Methods:

• Utilized N-terminally bound amino acid esters as starting materials.
• Employed Dondoni's C1-homologation reaction sequence for chain elongation.
• Performed solid-phase synthesis on Boc-resin, followed by conversion to target molecules.

Main Results:

• Successfully synthesized Boc-resin-bound alpha-hydroxy-beta-amino-aldehydes.
• Demonstrated the conversion of these intermediates into 2-hydroxy-1,3-ethyl-diamines and gamma-hydroxy-delta-amino-vinyl sulfones.
• Validated the applicability of the developed solid-phase methodology for complex peptidomimetic synthesis.

Conclusions:

• The study establishes a robust solid-phase strategy for accessing alpha-hydroxy-beta-amino-aldehyde synthons.
• This approach facilitates the synthesis of valuable peptide mimetics, including diamines and vinyl sulfones.
• The integration of Dondoni's homologation into solid-phase chemistry expands the synthetic toolkit for peptidomimetics.