Palladium-Catalyzed Regio- and Stereoselective Glycosylation of Azole Heterocycles Enables Access to Diverse Heterocyclic -Glycosides.

An efficient and practical glycosylation platform for synthesizing -glycosides by leveraging palladium catalysis is disclosed. This approach enables facile access to diverse heterocyclic -glycosides with excellent regio- and stereoselectivities and high site selectivity of multiple N atoms. The reaction exhibits a broad substrate scope (65 examples), high functional group tolerance, and easy scalability. Its synthetic utility is demonstrated through late-stage functionalization of pharmaceutically relevant molecules and various diastereoselective transformations of the glycoside products. Overall, our method provides a handy tool for efficient and stereocontrolled synthesis of valuable -glycosylated heterocycles.