A cyclic amidine typically having the formula: ##STR1## wherein R.sup.1 represents an organic radical, X represents a direct bond or a divalent organic radical and A and B each represent hydrogen or an organic radical is prepared by a liquid phase reaction of a nitrile of the formula R.sup.1 CN where R.sup.1 has the same meaning as above, with a polyamine typically having the formula: ##STR2## where X, A and B have the same meaning as above, in the presence presence of a mixture of a titanium compound with water.
一种通常具有以下式子的环形脒类化合物:##STR1## 其中R1代表有机基团,X代表直接键或二价有机基团,A和B各自代表氢或有机基团,通过在
钛化合物与
水的混合物存在下,将具有以下式子的
腈类化合物R1CN(其中R1的含义与上述相同)与通常具有以下式子的
多胺反应制备而成:##STR2## 其中X,A和B的含义与上述相同的。