mechanism analogous to that proposed for aldehyde and ketone reduction. Reduction of electron-rich N-alkyl-substituted imine, N-isopropyl-(4-methyl)benzilidene amine (9), was accompanied by facile imine isomerization and scrambling of deuterium labels from reduction with 5-RuDOH into the N-alkyl substituent of both the amine complex and into the recovered imine. Inverse equilibrium isotope effects were
羟基
环戊二烯基氢化
钌 5 可在室温以下有效还原
亚胺。氮上更好的供体取代基导致更快的速率和速率决定步骤从氢转移到胺配位的转变。在 11 摄氏度时减少缺电子 N-亚苄基
五氟苯胺 (8) 导致游离胺和 k(OH)/k(OD) = 1.61 +/- 0.08 的动力学同位素效应,k(RuH)/k(RuD) = 2.05 +/- 0.08 和 k(RuHOH)/k(RuDOD) = 3.32 +/- 0.14,表明限速协同氢转移,类似于醛和酮还原提出的机制。还原富电子的 N-烷基取代
亚胺、N-异丙基-(4-甲基)
联苯胺(9)、伴随着容易的
亚胺异构化和
氘标记从 5-RuDOH 还原到胺复合物的 N-烷基取代基和回收的
亚胺中的混乱。在 -48 摄氏度的 N-亚苄基-
叔丁胺 (11) 还原中观察到逆平衡同位素效应 (k(OH)/k(OD) = 0.89 +/- 0.06, k(RuH)/k(RuD) ) =