SYNTHESIS OF L-IDARO-1,4-LACTONE, AN INHIBITOR OF α-L-IDOSID-URONASE

Article abstract of DOI:10.1016/S0008-6215(00)80972-6

L-Idaro-1,4-lactone was synthesized by two different, published methods: (1) epimerization of monopotassium D-glucarate by refluxing in aqueous barium hydroxide, and (2) oxidation of L-iditol by heating in dilute nitric acid.The lactone, formed by heat dehydration from aqueous solution at low pH, was purified by paper chromatography, and quantitated by gas-liquid chromatography using inositol as the internal standard.The monolactone inhibited human, seminal-fluid α-L-idosiduronase activity, with either phenyl or 4-methylumbelliferyl α-L-idosiduronic acid as the substrate, to the same degree as D-glucaro-1,4-lactone inhibits α-D-glucosiduranose.