A ligand controlled catalytic system for the aerobicoxidation of 1[degree] amines to nitriles and imines has been developed where the varying [small pi]-acidic feature of BIAN versus phen in the frameworks of ruthenium catalysts facilitates switchable selectivity.
Reports on aerobic oxidation of amines to amides are rare, and those reported suffer from several limitations like poor yield or selectivity and make use of pure oxygen under elevated pressure. Herein, we report a practical and an efficient ruthenium‐catalyzed synthetic protocol that enables selective oxidation of a broad range of primary aliphatic, heterocyclic and benzylic amines to their corresponding
Aerobic oxidation of primary amines to amides catalyzed by an annulated mesoionic carbene (MIC) stabilized Ru complex
作者:Suman Yadav、Noor U Din Reshi、Saikat Pal、Jitendra K. Bera
DOI:10.1039/d1cy01541a
日期:——
Catalytic aerobic oxidation of primaryamines to the amides, using the precatalyst [Ru(COD)(L1)Br2] (1) bearing an annulated π-conjugated imidazo[1,2-a][1,8]naphthyridine-based mesoionic carbene ligand L1, is disclosed. This catalytic protocol is distinguished by its high activity and selectivity, wide substrate scope and modest reaction conditions. A variety of primaryamines, RCH2NH2 (R = aliphatic
Highly efficient aerobic oxidation of various amines using Pd<sub>3</sub>Pb intermetallic compounds as catalysts
作者:Shinya Furukawa、Akifusa Suga、Takayuki Komatsu
DOI:10.1039/c4cc00024b
日期:——
Various amines including primary, secondary, benzylic, aliphatic and cyclic ones are converted into imines with high yields using the Pd3Pb/Al2O3 catalyst.
Double Dehydrogenation of Primary Amines to Nitriles by a Ruthenium Complex Featuring Pyrazole Functionality
作者:Indranil Dutta、Sudhir Yadav、Abir Sarbajna、Subhabrata De、Markus Hölscher、Walter Leitner、Jitendra K. Bera
DOI:10.1021/jacs.8b05009
日期:2018.7.18
A ruthenium(II) complex bearing a naphthyridine-functionalized pyrazole ligand catalyzes oxidant-free and acceptorless selective double dehydrogenation of primary amines to nitriles at moderate temperature. The role of the proton-responsive entity on the ligand scaffold is demonstrated by control experiments, including the use of a N-methylated pyrazole analogue. DFT calculations reveal intricate hydride
带有萘啶官能化吡唑配体的钌 (II) 配合物在中等温度下催化伯胺无氧化剂和无受体选择性双脱氢为腈。质子响应实体在配体支架上的作用由对照实验证明,包括使用 N-甲基化吡唑类似物。DFT 计算揭示了复杂的氢化物和质子转移,以实现 2 当量 H2 的整体消除。