Synthesis, characterization and liquid crystalline properties of a series of hydroxybiphenyl benzoate and biphenyl bis(benzoate)
作者:Salhed Ahmed、Md. Mostafizur Rahman、Ashikur Rahman Rabbi、Md. Kausar Ahmed、S.M. Saiful Islam、Muhammad Younus、Bimal Bhusan Chakraborty、Sudip Choudhury、Shamim Ahmed、Nasim Sultana
DOI:10.1016/j.molliq.2016.10.002
日期:2016.12
Abstract Two series of hydroxybiphenyl benzoate 2a–2c and biphenyl bis(benzoate) 3a–3c have been synthesized by the esterification reaction of 4-alkoxybenzoic acid 1a–c with 1,1′-biphenyl-4,4′-diol in presence of DCC and DMAP in dichloromethane at room temperature under nitrogen atmosphere. Products ratio (2 vs 3) were not significantly influenced with the variation of alkoxy substituents. The newly
摘要 通过 4-烷氧基苯甲酸 1a-c 与 1,1'-联苯-4,4'-二醇在苯甲酸存在下的酯化反应,合成了两个系列的苯甲酸羟基联苯酯 2a-2c 和双(苯甲酸)联苯酯 3a-3c。 DCC 和 DMAP 在二氯甲烷中在室温和氮气气氛下进行。产物比率(2 vs 3)不受烷氧基取代基变化的显着影响。新合成的酯类产物通过 IR 和 NMR 光谱以及元素分析进行了表征。通过差示扫描量热法和偏振光学显微镜研究了转变温度和中间相。尽管合成的酯衍生物 3a-c 是非手性的,但在它们的中间相中表现出分子手性。