We describe herein a palladium-catalyzed Heck-type reaction of O-acetyl ketoximes and allylicalcohols to pyridines. This protocol allows robust synthesis of pyridines and azafluorenones in good to excellent yields with...
Synthesis of Pyridines, Quinolines, and Pyrimidines via Acceptorless Dehydrogenative Coupling Catalyzed by a Simple Bidentate <i>P</i>^<i>N</i> Ligand Supported Ru Complex
作者:Rajarshi Mondal、David E. Herbert
DOI:10.1021/acs.organomet.0c00058
日期:2020.4.27
A ruthenium hydrido chloride complex (1) supported by a simple, heteroleptic bidentate P^N ligand (L1) containing a diarylphosphine and a benzannulated phenanthridine donor arm is reported. In the presence of base, complex 1 catalyzes multicomponent reactions using alcohol precursors to produce structurally diverse molecules including pyridines, quinolines, and pyrimidines via acceptorless dehydrogenative
A pincer-type Ru(II)-NNP complex bearing a pyrazolyl-(NH-PtBu2)-pyridine ligand was synthesized and structurally characterized by NMR, IR, elemental analysis, and X-ray single-crystal crystallographic determinations, which efficiently catalyzed the synthesis of multisubstituted pyrroles and pyridines by means of the reactions of secondary alcohols and β- or γ-amino alcohols through deoxygenation and
合成了带有吡唑基-(NH-P t Bu 2)-吡啶配体的钳型Ru(II)-NNP络合物,并通过NMR,IR,元素分析和X射线单晶晶体学测定对其结构进行了表征,通过仲醇与β-或γ-氨基醇的脱氧反应以及选择性C–N和C–C键的形成,有效地催化了多取代吡咯和吡啶的合成。偶联反应以0.3mol%的催化剂负载量和容许的各种官能团进行。本工作提供了一种从容易获得的配体中构建高活性过渡金属配合物催化剂的替代方法。
Direct synthesis of pyridines and quinolines by coupling of γ-amino-alcohols with secondary alcohols liberating H2 catalyzed by ruthenium pincer complexes
A novel, one-step synthesis of substituted pyridine- and quinoline-derivatives was achieved by acceptorless dehydrogenativecoupling of gamma-aminoalcohols with secondaryalcohols. The reaction involves consecutive C-N and C-C bond formation, catalyzed by a bipyridyl-based rutheniumpincercomplex with a base.
A Ruthenium Catalyst with Unprecedented Effectiveness for the Coupling Cyclization of γ-Amino Alcohols and Secondary Alcohols
作者:Bing Pan、Bo Liu、Erlin Yue、Qingbin Liu、Xinzheng Yang、Zheng Wang、Wen-Hua Sun
DOI:10.1021/acscatal.5b02638
日期:2016.2.5
linyl)(carbonyl)(hydrido)ruthenium chloride exhibited extremely high efficiency toward the coupling cyclization of γ-amino alcohols with secondaryalcohols. The corresponding products, pyridine or quinoline derivatives, are obtained in good to high isolated yields. On comparison with literature catalysts whose noble-metal loading with respect to γ-amino alcohols reached 0.5–1.0 mol % for Ru and a record