A new catalytic amination of aromatic olefins with anilines is presented. In a domino reaction, substituted quinoline derivatives are obtained in the presence of cationic rhodium complexes, such as [Rh(cod)2]BF4, and PPh3. Ethylbenzene is formed as a by-product in this new oxidative reaction. The first transition metal catalyzed anti-Markovnikov hydroamination of styrene with anilines occurs as a side
Ytterbium(III) triflate catalyzed domino reaction of arylamines and styrene oxides: Synthesis of 2-benzyl-3-arylquinoline derivatives
作者:Saghir Ali、Abu Taleb Khan
DOI:10.1016/j.tetlet.2021.152981
日期:2021.4
efficient and straightforward method for the synthesis of 2-benzyl-3-arylquinoline derivatives is reported involving the domino reaction of substituted arylamines and styrene oxides in the presence of 10 mol% ytterbium(III) triflate in acetonitrile at 80 °C. Additionally, the reaction of aliphatic epoxides with p-anisidine provided 2,3-dialkylquinoline derivatives under identical reaction conditions. Important
报道了一种合成 2-苄基-3-芳基喹啉衍生物的高效而直接的方法,该方法涉及取代芳胺和苯乙烯氧化物在 80 °C 下在 10 mol% 镱 (III) 三氟甲磺酸乙腈溶液存在下发生的多米诺反应。 此外,脂肪族环氧化物与 p-茴香胺的反应在相同的反应条件下提供了 2,3-二烷基喹啉衍生物。该方案的重要特点是易于处理、底物范围广、产率高以及形成两个 CN 键和两个 CC 键。
Metal-Free, Ionic Liquid-Mediated Synthesis of Functionalized Quinolines
作者:Jaideep B. Bharate、Sandip B. Bharate、Ram A. Vishwakarma
DOI:10.1021/co500047w
日期:2014.11.10
An expedient and metal-free synthetic protocol for construction of substituted quinolines has been developed from anilines and phenylacetaldehydes using imidazolium cation-based ionic liquids as the reaction medium. Mechanistic analysis indicated that the reaction occurs through C-C and C-N bond formation to produce isolable 2,3-disubstituted quinoline intermediates, which undergo C-C bond cleavage to produce 3-substituted quinolines. The reaction proceeds smoothly with a range of functionalities in good to excellent yields. Advantages of this protocol include metal-free, environmentally friendly, recyclable reaction media, higher yields and shorter reaction times, and thus is promising for the efficient combinatorial synthesis of structurally diverse 2,3-disubstituted and 3-substituted quinolines.
Efficient One-Pot Synthesis of 2-Alkylquinolines under Solvent-Free Conditions Using Sulfonic Acid Functionalized Ionic Liquid as a Recoverable and Reusable Catalyst
作者:Min Zhang、Yuqiang Ding、Biao Xiong、Ting Wang、Li Wang
DOI:10.3987/com-11-12289
日期:——
Sulfonic acid functionalized ionic liquid (FIL-A) was firstly used as a recoverable and reusable catalyst for the synthesis of 2-alkylquinoline derivatives from simple and readily available alkylaldehydes and arylamines. The method has the advantages of simple experimental procedure, easy recovery and reuse of catalyst, solvent-free and mild reaction conditions, excellent functional group tolerance, etc. which makes it a highly practical and environmentally benign pathway for the synthesis of 2-alkylquinolines.