Methylation of Amines and Ketones with Methanol Catalyzed by an Iridium Complex Bearing a 2-Hydroxypyridylmethylene Fragment
作者:Danfeng Deng、Bowen Hu、Min Yang、Dafa Chen
DOI:10.1021/acs.organomet.8b00575
日期:2018.10.8
Reaction of complex [Cp*Ir(HOC5H3CH2C5H3OH)Cl][Cl] (1) with AgOTf generated the product [Cp*Ir(HOC5H3CH2C5H3OH)(H2O)][OTf]2 (2), which was further transformed to the complex [Cp*Ir(OC5H3CH2C5H3O)(H2O)] (3) in the presence of t-BuONa via −OH deprotonation. Complexes 1–3 exhibited high activity for the methylation of amines and ketones. These C–C and C–N coupling reactions proceeded in air with 1 mol
络合物[Cp * Ir(HOC 5 H 3 CH 2 C 5 H 3 OH)Cl] [Cl](1)与AgOTf反应生成产物[Cp * Ir(HOC 5 H 3 CH 2 C 5 H 3 OH) (H 2 O)] [OTf] 2(2),在存在下将其进一步转化为络合物[Cp * Ir(OC 5 H 3 CH 2 C 5 H 3 O)(H 2 O)](3)-OH去质子化生成t- BuONa。复合体1 - 3表现出高活性胺和酮的甲基化。这些C–C和C–N偶联反应在空气中以1 mol%的催化剂负载量在K 2 CO 3的存在下进行。