Synthesis of 5-aryl-5′-formyl-2,2′-bithiophenes as new precursors for nonlinear optical (NLO) materials
作者:Cyril Herbivo、Alain Comel、G. Kirsch、M. Manuela M. Raposo
DOI:10.1016/j.tet.2008.12.078
日期:2009.3
A series of formyl-substituted 5-aryl-2,2′-bithiophenes 5 were synthesized using two different methods: Vilsmeier–Haack–Arnold reaction (VHA) or through Suzuki coupling. The synthesis of compounds 5 through the Vilsmeier–Haack–Arnold reaction, starting from inexpensive and easily available precursors such as acetophenones, gave the title compounds in low yields after four reaction steps. On the other
使用两种不同的方法:Vilsmeier–Haack–Arnold反应(VHA)或通过Suzuki偶联合成了一系列被甲酰基取代的5-芳基-2,2'-联噻吩5。通过Vilsmeier-Haack-Arnold反应进行的化合物5的合成,是从廉价且容易获得的前体(如苯乙酮)开始的,经过四个反应步骤后,标题化合物的收率很低。另一方面,官能化的芳基硼酸7和5-溴-5'-甲酰基-2,2'-联噻吩6的Suzuki偶联仅一步就得到了高产率的化合物5。