Copper-Catalyzed Selective N-Sulfenylation of Tryptophan-Containing Peptides

Area of Science:

• Chemical Biology
• Organic Chemistry

Background:

• Site-selective peptide modification is crucial for advancing biomedical research.
• Current methods often lack versatility or require specific directing groups.

Purpose of the Study:

• To develop a novel, versatile strategy for the late-stage functionalization of peptides.
• To achieve site-selective N-sulfenylation of tryptophan residues in peptides.

Main Methods:

• Utilized copper catalysis for peptide modification.
• Developed a method for N-sulfenylation of tryptophan residues.
• Investigated compatibility with various functional groups.

Main Results:

• Successfully achieved site-selective N-S bond formation at the tryptophan nitrogen atom.
• Demonstrated broad functional group tolerance.
• Eliminated the need for directing groups in peptide functionalization.

Conclusions:

• The developed copper-catalyzed N-sulfenylation strategy offers a versatile approach for late-stage peptide modification.
• This method enables precise functionalization of peptides, particularly at tryptophan residues, with high site-selectivity.