Novel polyfunctional compounds and a process for their preparation are disclosed. These compounds and their alkali metal salts are useful metal sequestrants and/or detergent builders. Selected compounds are also intermediates useful in the syntheses of aconitic acid as well as isocitric and alloisocitric acids and their lactones. The novel polyfunctional compounds are obtained from the reaction of maleic anhydride with selected active methylene or methane containing compounds.
本发明揭示了一种新型的多功能化合物及其制备方法。这些化合物及其碱
金属盐是有用的
金属
螯合剂和/或洗涤剂添加剂。选定的化合物也是合成顺
乌头酸、
异柠檬酸和
异柠檬酸内酯及其
乳酸的中间体。这些新型的多功能化合物是通过
马来酸酐与选定的活性亚甲基或
甲烷含量化合物的反应获得的。