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以联苯双酚为起始原料,在KI的催化下与溴代正戊烷进行Williamson Ether的合成。溴丙烯与对羟基苯甲酸反应后即用氯化亚砜酰化,并与之前所制的联苯单醚酯化成4-烯丙氧基苯甲酸酯-4′-戊氧基-3,3′,5,5′-四甲基联苯。对合成的非对称型联苯酯类液晶化合物结构进行了红外和核磁表征,最后通过差示扫描量热仪(DSC)和TG对化合物的热重进行分析,并通过热台偏光显微镜(POM)进一步研究了非对称型联苯酯类化合物的材料性能。
The biphenyl bisphenol was used as the starting material to synthesize Williamson Ether with bromo-n-pentane under KI catalysis. After the reaction of bromopropene with p-hydroxybenzoic acid, it is acylated with thionyl chloride and esterified with the previously prepared biphenyl monoether to 4-allyloxybenzoate-4’-pentoxy-3, 3 ’, 5,5’-tetramethylbiphenyl. The structures of the synthesized asymmetric biphenyl ester liquid crystal compounds were characterized by IR and NMR. The thermogravimetric analysis of the compounds was carried out by differential scanning calorimetry (DSC) and TG, Further study of asymmetric biphenyl ester material properties.