An intermediate of the formula (I) wherein the radicals R1 are independently of one another methyl, ethyl or n-propyl, is suitable for preparing a compound of the formula (A) wherein X is a group of the formula (A-I) or (A-II), Y is C11-C17alkyl, and Z is a direct bond, —(CH2)8— or —CH2—S—CH2—. The compounds of the formula (A) are useful for stabilizing an organic material against thermal, oxidative or light induced degradation.
式 (I) 中间体(其中自由基 R1 相互独立地为甲基、乙基或正丙基)适用于制备式 (A) 化合物,其中 X 为式 (A-I) 或 (A-II) 基团,Y 为 C11-C17 烷基,Z 为直接键、-(
CH2)8- 或 - -S- -。式(A)化合物可用于稳定有机材料,防止热、氧化或光引起的降解。