具有光学活性的盘状液晶的合成及介晶性研究

SYNTHESIS OF AN OPTICAL DISCOTIC LIQUID CRYSTAL AND ITS MESOGENIC BEHAVIOR

将手性引入盘状液晶中，合成了具有光学活性的盘状液晶３，４，５－三辛氧基苯甲酸胆甾醇酯．通过ＤＳＣ和偏光显微镜研究显示，该化合物在３８～６５℃呈现液晶相．在对没食子酸甲酯进行多烷基化反应时，采用丙酮为溶剂，Ｋ２ＣＯ３为碱，在相转移催化剂作用下，反应时间缩短，产率提高．

An optical discotic liquid crystal, cholesteryl 3,4,5trioctanoxylbenzoate, is synthesized through reaction of the benzoyl chloride with cholesterol, a chiral reagent. Through DSC and optical microscope studies show that the compound appears mesogenic behavior from 38℃ to 65℃. The etherification of 3,4,5trioxylbenzoate is improved by the phase transfer catalyst, which shortens the reaction time and improves the yield. 