Abstract
Abstract β-D-Glucosides of pyromeconic acid (3-hydroxy-4-oxo-4H-pyran), maltol (3-hydroxy-2-methyl-4-oxo-4H-pyran) and α-hydroxymaltol (3-hydroxy-2-hydroxymethyl-4-oxo-4H-pyran) were synthesized in one pot by reaction of stoichiometric amounts of acetobromoglucose and preformed hydroxypyrone anion followed by catalytic deacetylation with methanolic KOH. Products were identified and characterized by comparison of mp and molar rotation with literature, and by FAB-MS, negative ferric chloride test, and H-1 and C-13 NMR. All glycosides were levorotatory, beta and gave recognizable pseudo-molecular ions.
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