陰イオン交換樹脂触媒による結晶グルクロン酸メチルおよびエチルエステルの合成

抄録

Methyl glucopyranuronate (I) has been synthesized in liquid state from glucuronolactone (II) and methanol by the catalyst of sodium methylate.
Ethyl glucopyranuronate (III) has been prepared similary from (II) and ethanol in the presence of sodium ethylate but for the isolation of pure crystalline state it was required to treat them from intensely colored reaction solution.
Authors have found that in the case of ester syntheses, anionic exchange resine possessed an excellent catalytic activity and succeeded in isolating (I) in crystalline state.
In the synthesis of (III), the reaction solution had almost colorless, therefore the unreacted (I) could be recovered and the crystals of (III) was obtained easily as crystals, simply by concentrating the reaction solution.