The acidic cleavage of pyridylmethyl(amino)phosphonates. Formation of the corresponding amines
作者:Bogdan Boduszek
DOI:10.1016/0040-4020(96)00727-2
日期:1996.9
Hydrolysis of 3-pyridylmethyl(amino)phosphonates by means of 20% aq. hydrochloric acid gave corresponding 3-pyridylmethyl(amino)phosphonic acids, as expected. However, hydrolysis of 2- and 4-pyridylmethyl(amino)phosphonates led to decomposition of the phosphonates with a cleavage of CP bond and formation of the corresponding amines. The leaving phosphorus moiety was identified as phosphoric acid.
3-吡啶基甲基(氨基)膦酸酯的水解通过20%aq。水溶液进行。如所预期的,盐酸得到相应的3-吡啶基甲基(氨基)膦酸。然而,2-和4-吡啶基甲基(氨基)膦酸酯的水解导致膦酸酯的分解,具有CP键的裂解并形成相应的胺。剩余的磷部分被鉴定为磷酸。反应范围限于氨基膦酸的2-和4-吡啶基甲基衍生物及其酯,以及具有相似结构的衍生物。相反,2-和4-吡啶基甲基(氨基)膦酸酯的碱性水解产生相应的氨基膦酸酯单烷基酯,在这些情况下未观察到CP键的断裂。