申请人:Ciba-Geigy Corporation
公开号:US04093586A1
公开(公告)日:1978-06-06
Compounds having the formula ##STR1## wherein X is alkyl, hydrogen, hydroxyl, oxygen radical, alkenyl, CH.sub.2 CH.sub.2 OCH.sub.3 or CH.sub.2 C.tbd.CH; R.sup.1 is alkyl or phenethyl; and R.sup.2 is alkyl, Are good light stabilizers. These compounds are prepared for example, from acetonlyacetone, an appropriate amine hydrochloride and sodium cyanide to give N-substituted 2,5-dimethyl-2,5-dicyanopyrrolidines which are coverted by standard techniques to the corresponding dicarboxylic acid. These esters are prepared by alkylation of appropriate alkali metal salts.
具有以下式##STR1##的化合物,其中X是烷基、氢、羟基、氧自由基、烯基、CH.sub.2 CH.sub.2 OCH.sub.3或CH.sub.2 C.tbd.CH;R.sup.1是烷基或苯乙基;R.sup.2是烷基,是良好的光稳定剂。例如,这些化合物可以通过从乙酮酮、适当的胺盐酸盐和氰化钠中制备,得到N-取代的2,5-二甲基-2,5-二氰基吡咯烷,然后通过标准技术将其转化为相应的二羧酸。这些酯类化合物是通过烷基化适当的碱金属盐制备的。