The reaction of phosphonic dichlorides with a mixture of benzyl alcohol and an aliphatic alcohol affords a mixture of the corresponding dibenzyl phosphonate, dialkyl phosphonate, and alkyl benzyl phosphonate which is easily separated by column chromatography to give the pure components. Cleavage of the dibenzyl phosphonate by catalytic hydrogenation affords the phosphonic acid whereas cleavage of the alkyl benzyl phosphonate under the same conditions affords the alkyl hydrogen phosphonate (monoester).
磷二
氯化物的反应与
苄醇和
脂肪醇混合物提供了相应的
二苄基膦酸盐、二烷基
膦酸盐和烷基苄基
膦酸盐混合物,该混合物通过柱色谱法容易分离得到纯成分。
二苄基膦酸盐通过催化氢化裂解得到
膦酸,而烷基苄基
膦酸盐在相同条件下裂解得到烷基氢
膦酸盐(单酯)。