Silyl-Substituted Tetrathia[7]helicenes: Synthesis, X-ray Characterization and Reactivity
作者:Alberto Bossi、Stefano Maiorana、Claudia Graiff、Antonio Tiripicchio、Emanuela Licandro
DOI:10.1002/ejoc.200700494
日期:2007.9
We describe the synthesis of trialkylsilyl-substituted trans-1,2-bis(thieno[3,2-e]benzothiophene-2-yl)ethenes as suitable soluble precursors for the preparation of the corresponding silylated tetrathia[7]helicenes, which, in turn, can be desilylated or transformed into dihalogen-substituted derivatives through electrophilic substitution of silyl substituents. X-ray structural studies showed that the
我们描述了三烷基甲硅烷基取代的反式-1,2-双(噻吩并[3,2-e]苯并噻吩-2-基)乙烯作为制备相应的甲硅烷基化四硫杂[7]螺旋烯的合适可溶性前体的合成,其中,反过来,可以通过甲硅烷基取代基的亲电取代脱甲硅烷基化或转化为二卤代衍生物。X 射线结构研究表明,末端噻吩环上两个三异丙基甲硅烷基的存在是烯烃的高溶解度和螺旋烯中非常大的二面角的原因。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)