作者:Roger Brettle、David A. Dunmur、Charles M. Marson、Milagros Piñol、Kazuhisa Toriyama
DOI:10.1246/cl.1992.613
日期:1992.4
A homologous series of 2-alkyl-5-(4′-cyanophenyl)thiophenes has been prepared and shown to have improved properties for use in liquid crystal displays. The thiophene ring is prepared from a 1-(4′-bromophenyl)-1,4-dioxoalkane, constructed using the Stetter procedure, by the action of Lawesson’s reagent, and the cyano-group is finally introduced using a copper(I)-mediated exchange reaction.
一种 2-烷基-5-(4′-氰基苯基)噻吩的同源系列已被制备出来,并被证明在液晶显示器中具有更好的性能。噻吩环由 1-(4′-溴苯基)-1,4-二氧代烷烃制备而成,该烷烃是在 Lawesson 试剂的作用下,通过 Stetter 程序构建而成,最后通过铜(I)介导的交换反应引入氰基。