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 %。
A mild, efficient and improved protocol for the friedländer synthesis of quinolines using lewis acidic ionic liquid
作者:Ganesan Karthikeyan、Paramasivan T. Perumal
DOI:10.1002/jhet.5570410632
日期:2004.11
Lewis acidic ionic liquid is shown to be for the first time an excellent medium and efficient catalyst for the synthesis of quinolines at room temperature from o-amino aromatic carbonyls and ketones containing active methylene group.
An efficient, high yielding protocol for the synthesis of functionalized quinolines via the tandem addition/annulation reaction of o-aminoaryl ketones with α-methylene ketones
作者:D. Subhas Bose、Racherla Kishore Kumar
DOI:10.1016/j.tetlet.2005.11.075
日期:2006.1
A mild and efficient method has been developed for the condensation of 2-aminoaryl ketones with α-methylene ketones in the presence of a catalytic amount of reusable catalyst CeCl3·7H2O (25 mol %) at ambient temperature to afford the corresponding poly-substituted quinolines in high yields under mild conditions.
Friedländer annulation: scope and limitations of metal salt Lewis acid catalysts in selectivity control for the synthesis of functionalised quinolines
作者:Babita Tanwar、Dinesh Kumar、Asim Kumar、Md. Imam Ansari、Mohammad Mohsin Qadri、Maulikkumar D. Vaja、Madhulika Singh、Asit K. Chakraborti
DOI:10.1039/c5nj02010g
日期:——
products during the reaction involving 2-aminobenzophenone and ethyl acetoacetate. Among a pool of metal halides, tetrafluoroborates, perchlorates, and triflates used as catalysts, In(OTf)3 emerged as the most effective catalyst for the selective/exclusive formation of the Friedländer product. The generality of the In(OTf)3-catalysed Friedländer reaction was demonstrated by the reaction of differently substituted
Water mediated synthesis of substituted quinolines - A new green approach to the friedländer annulation
作者:Nagarajan Panneer Selvam、Chandramathi Saravanan、D. Muralidharan、Paramasivan T. Perumal
DOI:10.1002/jhet.5570430537
日期:2006.9
A new green approach to the Friedländer Quinolinesynthesis is described for the preparation of polysubstituted quinolines from o-amino aryl ketones and carbonyl compounds containing active methylene group mediated by water and catalysed by KHSO4 in good yields.