Palladium‐Catalysed Direct Monoarylation of Bithiophenyl Derivatives or Bis(thiophen‐2‐yl)methanone with Aryl Bromides
作者:Karima Si Larbi、Safia Djebbar、Henri Doucet
DOI:10.1002/ejic.201100294
日期:2011.8
Arylated bithiophenes, which are useful compounds due to their coordination and/or physical properties, can be easily prepared by palladium-catalysed C–H bond activation of heteroaromatics followed by arylation using electron-deficient aryl bromides. A variety of 5-arylated 2,2′-bithiophenyl derivatives have been prepared. Good yields were generally obtained by using the air-stable [PdCl(dppb)(C3H5)]
芳基化联噻吩由于其配位和/或物理性质而成为有用的化合物,可以通过钯催化的杂芳烃的 C-H 键活化,然后使用缺电子的芳基溴化物进行芳基化来轻松制备。已经制备了多种 5-芳基化 2,2'-联噻吩衍生物。通过使用空气稳定的 [PdCl(dppb)(C3H5)] 配合物作为催化剂,通常可以获得良好的产率。芳基溴上的一系列官能团,例如乙酰基、甲酰基、酯、腈、三氟甲基、氟和羟烷基,是可以容忍的。