Synthesis of Unsymmetrical Trisulfides from S-Substituted Sulphenylthiosulphates

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Synthetic Chemistry

Background:

• Trisulfide units are prevalent in natural products, exhibiting valuable pharmacological properties.
• The synthesis of unsymmetrical trisulfides remains challenging, with limited broadly applicable methods available.

Purpose of the Study:

• To develop a versatile and scalable method for synthesizing unsymmetrical trisulfides.
• To introduce an easy-to-prepare, solid-state reagent for trisulfide construction.

Main Methods:

• Development of S-substituted sulphenylthiosulphate as a novel reagent.
• Reaction of alkyl electrophiles (bromides, chlorides, iodides, tosylates) with the novel reagent and thiourea.
• Application of the method for late-stage modification of drug molecules.

Main Results:

• Successful synthesis of diverse unsymmetrical trisulfides.
• Demonstration of the reagent's stability, ease of preparation, and scalability.
• Validation of the method in late-stage functionalization of pharmaceutical compounds.

Conclusions:

• The developed method provides a significant advancement in the synthesis of unsymmetrical trisulfides.
• The novel reagent and methodology offer a practical approach for both general synthesis and drug modification.