The palladium/copper-cocatalyzed oxidative C-H/C-H cross-coupling between two heteroarenes by using molecular oxygen as an oxidant instead of metal oxidants has been developed for the first time to construct biheteroaryl motifs. A relatively broad range of thiophenes, furans and indoles can smoothly couple with various N-heteroarenes in satisfactory yields. This catalytic system with O2 as the terminal oxidant offers clear advantages of economically feasible and eco-friendly processes.
首次开发了
钯/
铜共催化的氧化C-H/C-H交叉偶联反应,利用分子氧作为氧化剂而非
金属氧化剂,以构建双杂环芳香基。这一催化系统能够以令人满意的产率,顺利地使较广范围内的
噻吩、
呋喃和
吲哚与各种N-杂环芳香族化合物偶联。以O2作为末端氧化剂的这一催化系统具有经济可行和环保的明显优势。