General synthesis of chelate conjugates of amino sugars and metals; salicylideneamine Schiff's bases

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Abstract
Copper(II) acetate reacts with methyl 3,4,6-tri-O-acetyl-2-deoxy-2-salicylideneamino-β-D-glucopyrano-side (2) in methanol solution to form the Schiff's base complex (3), the symmetry of which changes from pseudotetrahedral in the solid to a more flattened tetrahedral symmetry in solution; the zinc and cobalt complexes of (2) have also been synthesized.