| 摘要 |
PURPOSE:To obtain a new trivalent or tetravalent aliphatic polycarboxylic acid amide which is a useful material as an antioxidant, ultraviolet absorbent, antibacterial agent, mildew-proofing agent, nucleating agent, additive to polymers, etc. CONSTITUTION:This compound is an aliphatic polycarboxylic acid amide expressed by formula I [A is a 3-10C aliphatic saturated carboxylic acid residue; X is NR<1>R<2> (R<1> and R<2> are each H, an alkyl, a halogenoalkyl,, an alkenyl, a cycloalkyl, a cycloalkenyl, an aryl or an aralkyl); (n) is 3 or 4], e.g. 1,2,3- propanetricarboxylic acid tricyclohexylamide. A compound of formula I is obtained by heating an aliphatic polycarboxylic acid ester of formula II (R<3> is a 1-4C alkyl) and an amine of formula III without using a catalyst or in the presence of an acid catalyst to carry out ester-amide interchange reaction. By this process, the objective compound is easily and efficiently produced on an industrial scale at a low cost in high yield and purity. |
