Total Synthesis of Everninomicin 13,384-1-Part 4: Explorations of Methodology; Stereocontrolled Synthesis of 1,1′-Disaccharides, 1,2-Seleno Migrations in Carbohydrates, and Solution- and Solid-Phase Synthesis of 2-Deoxy Glycosides and Orthoesters
作者:K. C. Nicolaou、Konstantina C. Fylaktakidou、Helen J. Mitchell、Floris L. van Delft、Rosa Maria Rodríguez、Scott R. Conley、Zhendong Jin
2-deoxy glycosides, and orthoesters are reported. Specifically, a tin-acetal moiety was utilized to fix the anomeric stereochemistry of a carbohydrate acceptor leading to an efficient and stereoselective synthesis of 1,1'-disaccharides, while a newly discovered 1,2-phenylseleno migration reaction in carbohydrates opened entries to 2-deoxy glycosides and orthoesters. Thus, reaction of 2-hydroxy phenylselenoglycosides