The 3-halotetrahydropyran-2-ols have been found to readily give derivatives of tetrahydrofurfural in aqueous alcohol under weakly basic or acidic conditions. In strongly alkaline solution tetrahydropyran-2,3-diol and its anhydro-polymers were formed. 3,3-Dichlorotetrahydropyran-2-ol and 2,3,3-trichlorotetrahydropyran have been converted by aqueous alkali to viscous sirups which appear to contain 2-hydroxytetrahydropyran-3-one and its tautomers. On oxidation with permanganate these sirups have yielded succinic acid.
3-卤代四氢吡喃-2-醇在弱碱性或酸性条件下,可以在水性醇中轻易地生成四氢呋喃醛衍生物。在强碱性溶液中,会形成四氢吡喃-2,3-二醇及其无水聚合物。3,3-二氯四氢吡喃-2-醇和2,3,3-三氯四氢吡喃在水性碱中转化为粘稠的糖浆,似乎含有2-羟基四氢吡喃-3-酮及其互变异构体。在过氧化钾的氧化下,这些糖浆可以生成琥珀酸。