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