Synthesis of Functionalized Dioxa-aza[7]helicenes Using Palladium Catalyzed Arylations

Despite the recent reports on transition-metal catalyzed cycloisomerization strategies toward helicenes, the amount of palladium catalyzed routes remains rather scarce. Within this letter the successful preparation and characterization of novel dioxa-aza[7]helicenes using palladium mediated coupling reactions is presented.尽管近期已有关于过渡金属催化环异构化策略构建螺烯（helicenes）的相关报道，但钯催化的合成路径仍相对匮乏。本通讯报道了利用钯介导偶联反应成功制备并表征新型二氧杂氮杂[7]螺烯的研究成果。