Abstract
A flexible strategy for the stereoselective synthesis of branched amino sugar analogues is described. It is based on a C3-chain elongation of suitable protected aldoses. By using the sequence homoaldol reaction, epoxidation, and methanolysis α-methyl allo-furanosides are obtained. Proximate amination of the corresponding triflates afford the title compounds. All reactions proceed with high yield, high diastereoselectivities, and allow for a broad application.
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