申请人:Ciba-Geigy Corporation
公开号:US04075161A1
公开(公告)日:1978-02-21
Ester and amides having the formula ##STR1## wherein R, R.sup.1 and R.sup.2 are independently lower alkyl or cycloalkyl groups, R.sup.3 is hydrogen, alkyl, cycloalkyl, alkylene, phenyl, phenyl substituted by alkyl groups, alkylthioethyl, thiobis-alkylene, alkyleneoxyalkylene, polyoxyalkylene or a polyvalent cyclic or acyclic hydrocarbon radical, R.sup.4 is hydrogen, lower alkyl, cycloalkyl, R.sup.5 is hydrogen, alkyl, phenyl, phenyl substituted by alkyl groups, alkylene, a polyvalent cyclic or acyclic hydrocarbon radical or alkyleneoxy-alkylene, A is lower alkylene, m is 1 to 4 and n is 1 to 6. The esters are prepared by usual esterification procedures from a suitable alcohol and an acid of the formula III ##STR2## or an acid halide or acid anhydride thereof. The higher alkyl esters can also be prepared from the lower alkyl ester, especially the methyl ester, by transesterification with a higher alkanol or polyol. The amides are prepared by usual amidation procedures by reacting a carboxylic acid of formula III, an acid chloride, anhydride or a lower alkyl ester thereof with the appropriate amine. The nitriles corresponding to acids of formula III are prepared as well as some malonate esters derived having the formula V. ##STR3## The compounds are useful as stabilizers of organic materials, especially polyolefins, which deteriorate upon exposure to light and heat.
具有以下式子的酯和酰胺:##STR1## 其中,R、R.sup.1和R.sup.2分别是独立的低烷基或环烷基,R.sup.3是氢、烷基、环烷基、烷基烯、苯基、被烷基取代的苯基、烷硫乙基、硫代双烷基、烷氧基烷基、聚氧烷基或多价环烷基或非环烷基的烃基,R.sup.4是氢、低烷基、环烷基,R.sup.5是氢、烷基、苯基、被烷基取代的苯基、烷基烯、多价环烷基或非环烷基的烃基或烷氧基烷基,A是低烷基烷基,m为1至4,n为1至6。这些酯是通过适当的醇和III式酸或其酸卤或酸酐的常规酯化程序制备的。高烷基酯也可以通过与较高的烷醇或多元醇进行酯交换制备,特别是甲酯。酰胺是通过将III式羧酸、酸氯化物、酐或其低烷基酯与适当的胺反应的常规酰胺化程序制备的。对应于III式酸的腈也被制备出来,以及具有以下式子的一些马隆酸酯。##STR3## 这些化合物可用作有机材料的稳定剂,特别是在光和热的作用下恶化的聚烯烃。