An efficient and divergent strategy for the totalsynthesis of the first 3,6-dihydroaminosugars, furanodictines A (2-acetamido-3,6-anhydro-2-deoxy-5-O-isovaleryl-d-glucofuranose) and B (2-acetamido-3,6-anhydro-2-deoxy-5-O-isovaleryl-d-mannofuranose), has been developed. The synthetic process is featured by readily accessible and stereodefined manipulation of highly functionalized bicyclic tetrahydrofuran