Carbohydrates
Carbohydrates U 0500 Synthesis, Configurational and Conformational Studies of Six Amino Sugar Precursors Formed by [3 + 2] Cycloaddition of Alkylnitrile Oxides to Enone Sugars.-The highly reactive α,β-unsaturated sugar enones (III) and in situ generated nitrile oxides undergo a regio-and stereoselective 1,3-dipolar cycloaddition to afford novel bicyclic precursors (V) of amino sugars. -(DE FREITAS FILHO, J. R.; COTTIER, L.; SRIVASTAVA*, R. M.; SINOU, D.; Synlett 2003, 9, Special Issue, 1358-1360; Dep. Quim. Fundam., Univ. Fed. Pernambuco, 50670 Recife, Brazil; Eng.) -Mais 48-169