Direct and Catalytic C‐Glycosylation of Arenes: Expeditious Synthesis of the Remdesivir Nucleoside. Issue 11 (2nd February 2022)

• Record Type: Journal Article
• Authors: Obradors, Carla; Mitschke, Benjamin; Aukland, Miles H.; Leutzsch, Markus; Grossmann, Oleg; Brunen, Sebastian; Schwengers, Sebastian A.; List, Benjamin
• Is Part Of: Angewandte Chemie international edition. Volume 61:Issue 11(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-02
• Subjects: Glycosylation -- C-glycosides -- Silylium catalysis -- Remdesivir; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202114619
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Since early 2020, scientists have strived to find an effective solution to fight SARS‐CoV‐2, in particular by developing reliable vaccines that inhibit the spread of the disease and repurposing drugs for combatting its effects on the human body. The antiviral prodrug Remdesivir is still the most widely used therapeutic during the early stages of the infection. However, the current synthetic routes rely on the use of protecting groups, air‐sensitive reagents, and cryogenic conditions, thus impeding a cost‐efficient supply to patients. We have, therefore, focused on the development of a straightforward, direct addition of (hetero)arenes to unprotected sugars. Here we report a silylium‐catalyzed and completely stereoselective C‐glycosylation that initially yields the open‐chain polyols, which can be selectively cyclized to provide either the kinetic α‐furanose or the thermodynamically favored β‐anomer. The method significantly expedites the synthesis of Remdesivir precursor GS‐441524 after a subsequent Mn‐catalyzed C−H oxidation and deoxycyanation. Abstract : A straightforward, direct addition of (hetero)arenes to unprotected sugars is presented. A silylium‐catalyzed and completely stereoselective C ‐glycosylation initially yields the open‐chain polyols, which are cyclized to provide either the kinetic α‐furanose or the thermodynamically favored β‐anomer. The utility of the method is showcased in the synthesis of Remdesivir precursor GS‐441524 by a subsequent Mn‐catalyzed C−H oxidation and deoxycyanation.