abstract |
An intermediate of the formula (I) wherein the radicals R 1 are independently of one anothermethyl, 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 C 11 -C 17 alkyl, and Z is a direct bond, -(CH 2 ) 8 - or -CH 2 -S-CH 2 -. The compounds of the formula (A) are useful for stabilizing an organic material against thermal, oxidative or light induced degradation. |