Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The title aminosugar 1 was stereoselectively prepared in 13 steps and 16% overall yield from the l-allo-threonine synthetic equivalent 2, which is in turn obtained in one step from (S) ethyl β-hydroxybutyrate. ... The title protected aminosugar 1 was synthesized in good overall ...