摘要
采用一锅法的工艺通过甲基丙烯酸先酰氯化,再与2,2,2-三氟乙醇在催化剂4-二甲氨基吡啶的催化下酯化的方法,方便快捷地制备了甲基丙烯酸-2,2,2-三氟乙酯,并根据实验结果讨论了影响反应的主要因素。最佳反应条件是:二甲基甲酰胺(DMF)和4-二甲氨基吡啶(DMAP)的用量为5%.10%(质量比),甲基丙烯酸:氯化垩砜:2,2,2-三氟乙醇=1.1:1:0.9(摩尔比),反应温度为50.60℃,收率达到95%以上。
The methacrylic acid-2, 2, 2-trifluroethyl alcohol was prepared by the-esterification of methacrylic acid with 2, 2, 2-trifluroethyl alcohol. The main factors which affected the reaction were investigated. The optimal reaction conditions were as follows: the amount of DMF and DMAP was 5% - 10% of the methacrylic acid, n(methacrylic acid) : n (thionyl dichloride) : n(2, 2,. 2-trifluro ethyl alcohol) = 1. 1 : 1:0.9, and the temperature was 50 - 60 ℃. The yield was up to 95 %.
出处
《化学世界》
CAS
CSCD
北大核心
2007年第11期675-677,共3页
Chemical World