Cp*Ir complex bearing a flexible bridging and functional 2,2′-methylenebibenzimidazole ligand as an auto-tandem catalyst for the synthesis of N-methyl tertiary amines from imines via transfer hydrogenation/N-methylation with methanol
作者:Xiaozhong Chen、Yao Ai、Peng Liu、Chenchen Yang、Jiazhi Yang、Feng Li
DOI:10.1016/j.jcat.2021.08.037
日期:2021.10
A Cp*Ir complex bearing a flexible bridging and functional 2,2′-methylenebibenzimidazole ligand was designed, synthesized, and found to be a general and efficient auto-tandem catalyst for the synthesis of N-methyl tertiary amines from imines via transfer hydrogenation/N-methylation with methanol as both hydrogen source and methylating reagent. In the presence of [Cp*Ir(2,2′-CH2BiBzImH2)Cl][Cl], a range
设计、合成了带有柔性桥接和功能性 2,2'-亚甲基联苯并咪唑配体的 Cp*Ir 配合物,并发现它是一种通用且高效的自串联催化剂,用于通过转移氢化从亚胺合成 N-甲基叔胺/N-甲基化用甲醇作为氢源和甲基化试剂。在 [Cp*Ir(2,2'-CH 2 BiBzImH 2 )Cl][Cl] 存在下,以高收率和几乎完全的选择性获得了一系列理想的产物。由于高度的原子经济性以及最少的化学品和能源消耗,该反应极具吸引力。值得注意的是,这项研究展示了金属-配体双功能催化剂在活化甲醇作为有机合成的 C1 来源方面的新潜力。