A Diruthenium Catalyst for Selective, Intramolecular Allylic C–H Amination: Reaction Development and Mechanistic Insight Gained through Experiment and Theory
作者:Mark Edwin Harvey、Djamaladdin G. Musaev、J. Du Bois
DOI:10.1021/ja203576p
日期:2011.11.2
tetrakis(2-oxypyridinato)diruthenium(II,III) chloride, [Ru(2)(hp)(4)Cl], catalyzes intramolecular allylic C-H amination with bis(homoallylic) sulfamate esters. These results stand in marked contrast to reactions performed with dirhodium catalysts, which favor aziridine products. The following discussion constitutes the first report of C-H amination using complexes such as [Ru(2)(hp)(4)Cl] and related diruthenium adducts
混合价桨轮复合物四 (2-oxypyridinato) diruthenium (II,III) 氯化物 [Ru(2)(hp)(4)Cl],催化分子内烯丙基 CH 胺化与双(高烯丙基)氨基磺酸酯。这些结果与使用有利于氮丙啶产物的铱催化剂进行的反应形成鲜明对比。以下讨论构成了使用复合物如 [Ru(2)(hp)(4)Cl] 和相关二钌加合物的 CH 胺化的第一份报告。计算和实验研究涉及 [Ru(2)(hp)(4)Cl] 促进的 CH 胺化的机制,涉及氢原子提取/自由基重组和离散但短命的双自由基物种的中介。集体数据为理解这种催化剂氧化烯丙基(和苄基)CH 键的偏好提供了一个连贯的模型。