A description is given of novel compounds of formula I ##STR1## wherein R.sup.1, R.sub.2, R.sub.3, and R.sup.4 are hydrogen, alkyl, phenylalkyl, or alkoxy and where R.sub.5 and R.sub.6 are hydrogen or phenyl or together with the linking carbon atoms, are cycloalkenylene or cycloalkenylene which is interrupted by oxygen or sulfur. These compounds are useful as stabilizers for organic materials against oxidative, thermal or light-induced degradation.
给出了一种新型化合物的描述,其
化学式为I ##STR1## 其中R.sup.1,R.sub.2,R.sub.3和R.sup.4为氢,烷基,苯基烷基或烷氧基,而R.sub.5和R.sub.6为氢或苯基,或者与连接碳原子一起,为环烯烃基或由氧或
硫断裂的环烯烃基。这些化合物可用作有机材料的稳定剂,防止其发生氧化、热降解或光诱导降解。