By performing the thermal aging experiments of the polymeric material added antioxidant 2, 2'-methylenebis(4-methyl-6-tert-butyl phenol)(2246), it became a dimmer while showing its anti-aging performance, which caused the polymeric material changed to yellow gradually.In order to correct the defect, the study on 2246 synthesized through esterification acetyl chloride and 2-[1-(2-hydroxy-3tert-butyl-5-methyl)-ethyl]-4-methyl-6-tert-butylphenyl to replace 2246.This product can prevent from absorbing visible light which is achromatous.At the same time it can form a quinine derivative by absorbing ultraviolet radiation which could inversely transform itself by a exothermic process.Under the following optimal conditions:n(2246)∶n(acetyl chloride)∶n(triethylaamine)=1.00∶1.14∶ 1.20,73-77℃, and 4 h, the product was synthesized with the conversion of 98.5％, molar yield of 97.0％,product purity of 99.6％and melting point of 101.3-102.5℃.IR,1H NMR confirmed the structure of the product.%以抗氧剂2246和乙酰氯为原料,进行单酚羟基酯化反应,合成了2-(2-羟基-5-甲基-3-叔丁基苯甲基)-4-甲基-6-叔丁基苯基乙酸酯(简称抗氧剂2246单乙酸酯),作为传统抗氧剂2246的更新换代产品.合成抗氧剂2246单乙酸酯的最佳工艺条件是:n(抗氧剂2246)∶n(乙酰氯):n(三乙胺)=1.00∶1.15∶1.20,反应温度73～77℃、反应时间4 h,合成抗氧剂2246单乙酸酯的原料转化率99.0%,产物选择性98.5%,收率97.0%,产物质量分数99.2%,熔点101.3～102.5℃.产物结构经IR、1H NMR进行了确证.
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