Synlett 2017; 28(13): 1510-1516
DOI: 10.1055/s-0036-1589020
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© Georg Thieme Verlag Stuttgart · New York

Glycosyl Stille Cross-Coupling with Anomeric Nucleophiles – A General Solution to a Long-Standing Problem of Stereocontrolled Synthesis of C-Glycosides

Feng Zhu
Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA   Email: maciej.walczak@colorado.edu
,
Tianyi Yang
Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA   Email: maciej.walczak@colorado.edu
,
Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA   Email: maciej.walczak@colorado.edu
› Author Affiliations
Further Information

Publication History

Received: 10 March 2017

Accepted after revision: 06 April 2017

Publication Date:
24 May 2017 (online)


Abstract

Aryl C-glycosides are common structural motifs found in bioactive natural products and commercially available drugs. Despite their importance, most chemical methods to prepare C-glycosides have relied on the nucleophilic addition/substitution of a glycosyl electrophile, which result in variable anomeric selectivities and yields. Furthermore, these methods are not compatible with saccharides containing free hydroxyl groups. Here, we describe a direct cross-coupling reaction of anomeric nucleophiles (anomeric stannanes) and aryl halides. This method is the first general approach to the synthesis of aryl C-glycosides resulting in exclusive anomeric selectivities for both anomers for a broad range of aryl and carbohydrate coupling partners (including unprotected saccharides).

1 Introduction

2 Synthesis of Anomeric Stannanes

3 Glycosyl Stille Cross-Coupling

4 Future Outlook

5 Summary