More recently, the same group repor

More recently, the same group reported the synthesis of 2-trifluoromethylselenylated benzofused heterocycles (Scheme 7) [24]. This tandem process consisted in a first Pd-catalyzed cyclization of 2-(2,2-dibromovinyl)phenols/-thio-phenols/-anilines, leading to the corresponding 2-brominated heterocycle. This intermediate was then trifluoromethylseleny- lated by [(bpy)CuSeCF3]2. While benzofurans and benzothio- phenes were prepared in moderate to good yields, only marginal yields were obtained with indole derivatives (up to 25%). Finally, the reactions could easily be scaled up to a gram scale