DE NOVO ASYMMETRIC APPROACH TO THE DISACCHARIDE PORTION OF SCH-47554

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Carbohydrate Chemistry

Background:

• The disaccharide portion of SCH-47554 is a key structural feature.
• Previous synthetic routes to related disaccharides were lengthy.

Purpose of the Study:

• To develop an efficient and shorter asymmetric synthesis method for the disaccharide moiety of SCH-47554.
• To establish stereocenters using modern synthetic methodologies.

Main Methods:

• Asymmetric synthesis
• Noyori reduction for establishing initial stereochemistry
• Diastereoselective Palladium-catalyzed glycosylation
• Post-glycosylation transformations

Main Results:

• A 6-step synthetic route to the target disaccharide was successfully developed.
• The route is shorter compared to previously reported methods for related structures.
• Stereocenters were effectively established using the described methodology.

Conclusions:

• The developed 6-step method provides an efficient approach for the asymmetric synthesis of the SCH-47554 disaccharide.
• This route offers an improvement over existing methods in terms of step count.
• The strategy highlights the utility of Noyori reduction and Pd-glycosylation in complex carbohydrate synthesis.