Synthesis of Triphenylene Discotic Liquid Crystal Dimers: Click Chemistry As an Efficient Tool
作者:K. Q. Zhao、Y. F. Bai、P. Hu、B. Q. Wang、Y. Shimizu
DOI:10.1080/15421400903051093
日期:2009.9.3
be a convenient tool for synthesis of discotic liquid crystal dimers, oligomers and polymers. In this report, triphenylenes containing terminal alkynes and azides were prepared, and the cycloaddition reaction (click chemistry) between them catalyzed by CuI-Et3N in toluene produced discotic liquid crystal dimers in high yield and good selectivity. The dimers and intermediates have been fully characterized
炔烃和叠氮化物之间的点击化学可高效产生三唑,并且将成为合成盘状液晶二聚体、低聚物和聚合物的便捷工具。在该报告中,制备了含有末端炔烃和叠氮化物的苯并苯,它们之间的环加成反应(点击化学)在甲苯中由 CuI-Et3N 催化,以高产率和良好的选择性制备了盘状液晶二聚体。二聚体和中间体已通过 1H NMR 和高分辨率 MS 进行了充分表征。偏光显微镜 (POM) 和差示扫描量热法 (DSC) 结果表明,二聚体在从极低温度到很宽的温度范围内都具有柱状中间相。二聚体中的三唑部分可以作为电子和氢键受体,以及离子形成部分,