Copper-Catalyzed Glycosylation Protocol Based on 1,4-Naphthoquinone-Derived Thioglycosides

Area of Science:

• Organic Chemistry
• Carbohydrate Chemistry
• Catalysis

Background:

• Glycosylation is a crucial reaction in carbohydrate chemistry.
• Developing efficient and versatile glycosyl donors is essential for synthesizing complex carbohydrates.
• Existing methods often require expensive reagents or harsh conditions.

Purpose of the Study:

• To develop novel glycosyl donors for copper-catalyzed glycosylation.
• To establish a rapid and efficient synthesis of these new donors.
• To demonstrate the broad applicability of these donors in various glycosylation strategies.

Main Methods:

• Synthesis of 2-(para-methoxyphenylethynyl)-1,4-naphthoquinone-3-thioglycosides (NQTs) via a one-pot, two-step procedure.
• Copper(II)-catalyzed glycosylation reactions utilizing NQT donors.
• Application of NQT donors in latent-active glycosylation and one-pot saccharide synthesis.

Main Results:

• NQT donors were synthesized rapidly and efficiently.
• Copper(II) salts effectively activated NQT donors for glycosylation.
• A broad range of substrates were successfully glycosylated using NQT donors.
• NQT donors demonstrated compatibility with latent-active strategies and one-pot synthesis.

Conclusions:

• NQTs represent a novel and effective class of glycosyl donors.
• Copper-catalyzed glycosylation with NQTs is a practical and versatile method.
• This approach facilitates efficient synthesis of complex carbohydrates and oligosaccharides.