1-aminoalkane--1, 1-diphosphonic acids of the formula, ##STR1## may be produced in good yield by reacting a nitrile of the formula, R -- CH.sub.2 -- C .tbd. N with at least 2 moles of phosphorous acid in the presence of a high boiling hydrocarbon oil at a temperature ranging between 140.degree.-170.degree. C without a catalyst. In the above formula, R is hydrogen, alkyl, aryl, arylalkyl, substituted aryl, substituted alkyl, and substituted arylalkyl. These compounds show anti-corrosive activity.
公式为##STR1##的1-
氨基烷基-1,1-
二膦酸盐可以通过在高沸点烃油存在下,在温度在140℃至170℃之间的条件下,将公式为R-
CH2-C≡N的腈与至少2摩尔的
磷酸反应而获得良好的产率,反应无需催化剂。在上述公式中,R为氢、烷基、芳基、芳基烷基、取代芳基、取代烷基和取代芳基烷基。这些化合物表现出防腐蚀活性。