Polysulfurating reagent design for unsymmetrical polysulfide construction.

Area of Science:

• Chemical Synthesis
• Organic Chemistry
• Biochemistry

Background:

• Polysulfides are crucial structural components across various scientific fields.
• Existing methods for synthesizing unsymmetrical polysulfides are limited and prone to side reactions.

Purpose of the Study:

• To develop novel, versatile reagents for efficient unsymmetrical polysulfidation.
• To enable late-stage functionalization of complex molecules like biomolecules and pharmaceuticals.

Main Methods:

• Design and scalable synthesis of a library of polysulfurating reagents (R-S-S-OMe).
• Selective activation of sulfur-oxygen bonds using proton and boride based on the hard and soft acids and bases principle.
• Gram-scale transformations with diverse nucleophiles under mild conditions.

Main Results:

• Successful synthesis of broad-spectrum polysulfurating reagents.
• Efficient and selective unsymmetrical polysulfuration achieved.
• Demonstrated gram-scale transformations with various nucleophiles.
• Established a range of polysulfurated biomolecules, including SS-(+)-δ-tocopherol, SS-sulfanilamide, SS-saccharides, SS-amino acids, and SSS-oligopeptides.

Conclusions:

• The developed polysulfurating reagents offer a powerful tool for synthesizing unsymmetrical polysulfides.
• This method facilitates the late-stage modification of valuable compounds for drug discovery and development.
• The approach provides a scalable and efficient route to diverse polysulfurated molecules.