B–H functionalization has been achieved. Under the assistance of a bidentate directing group, Cu-catalyzed [4+2] annulation of carboranyl amides with internal alkynes affords unprecedented C,B-substituted carborane-fused-pyridone derivatives, whereas the use of terminal alkynes leads to B–H/C(sp)–H dehydrocoupling products. The isolation and structural identification of a notably stable Cu(I) intermediate
已实现了贱
金属催化的区域选择性笼B–H功能化。在双齿导向基团的协助下,Cu催化的[4 + 2]碳
硼烷酰胺与内部
炔烃的环化反应提供了前所未有的C,B取代的碳
硼烷稠合
吡啶酮衍
生物,而使用末端
炔烃则导致B–H / C(sp)–H脱氢偶联产物。明显稳定的Cu(I)中间体的分离和结构鉴定对反应机理有所启发,该反应机理被认为涉及Cu(III)中间体。