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
Sequential Amination/Annulation/Aromatization Reaction of Carbonyl Compounds and Propargylamine: A New One-Pot Approach to Functionalized Pyridines
作者:Giorgio Abbiati、Antonio Arcadi、Gabriele Bianchi、Sabrina Di Giuseppe、Fabio Marinelli、Elisabetta Rossi
DOI:10.1021/jo0347260
日期:2003.9.1
A general one-pot synthesis of pyridines 4a-t from the reaction of dialkyl acyclic/cyclic ketones 1a-i, methyl, aryl/heteroaryl ketones 1m-r, and aldehydes bearing alpha-hydrogens 1s,t with propargylamine 2 is described. Gold and copper salts are efficient catalysts for the reaction of ketones with 2. The formation of the pyridines 4 is suggested to proceed through the sequential amination of carbonyl
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
Direct synthesis of ring-fused quinolines and pyridines catalyzed by <i>NN</i><sub><i>H</i></sub><i>Y</i>-ligated manganese complexes (Y = NR<sub>2</sub> or SR)
作者:Zheng Wang、Qing Lin、Ning Ma、Song Liu、Mingyang Han、Xiuli Yan、Qingbin Liu、Gregory A. Solan、Wen-Hua Sun
DOI:10.1039/d1cy01945g
日期:——
Four cationic manganese(I) complexes, [(fac-NNHN)Mn(CO)3]Br (Mn-1–Mn-3) and [(fac-NNHS)Mn(CO)3]Br (Mn-4) (where NNH is a 5,6,7,8-tetrahydro-8-quinolinamine moiety), have been synthesized and evaluated as catalysts for the direct synthesis of quinolines and pyridines by the reaction of a γ-amino alcohol with a ketone or secondary alcohol; NNHS-ligated Mn-4 proved the most effective of the four catalysts
四种阳离子锰( I )配合物,[( fac-NN H N )Mn(CO) 3 ]Br ( Mn-1 – Mn-3 ) 和 [( fac-NN H S )Mn(CO) 3 ]Br ( Mn -4 )(其中N H是 5,6,7,8-四氢-8-喹啉胺部分),已被合成并评估为通过 γ-氨基醇与酮或仲醇;NN H S -连接的Mn-4被证明是四种催化剂中最有效的。在催化剂负载量为 0.5-5.0 mol% 的情况下,反应进行得很好,并且可以耐受不同的官能团,如烷基、环烷基、烷氧基、氯化物和杂芳基。基于 DFT 计算和实验证据,提出了一种涉及无受体脱氢偶联 (ADC) 的机制。值得注意的是,这种基于锰的催化方案为广泛合成重要的取代单环、双环和三环N-杂环(包括 50 个喹啉和 26 个吡啶实例)提供了一条有前途的绿色环保途径,分离产率高达 93 %。
Cu-Catalyzed Pyridine Synthesis via Oxidative Annulation of Cyclic Ketones with Propargylamine
作者:Svitlana O. Sotnik、Andrii I. Subota、Anton Y. Kliuchynskyi、Dmytro V. Yehorov、Anton S. Lytvynenko、Alexander B. Rozhenko、Sergey V. Kolotilov、Sergey V. Ryabukhin、Dmitriy M. Volochnyuk
DOI:10.1021/acs.joc.0c03038
日期:2021.6.4
limitation of the reaction were studied using 24 different cyclicketones as starting materials. The fused pyridine yield decreased among cyclicketones in the following order: six-membered ≫ eight-membered > five-membered ∼ seven-membered. The elaborated reaction conditions demonstrated tolerance to a number of protective functional groups in ketone such as ester, tert-butoxycarbonyl (Boc)-protected amine