Pd-mediated synthesis of 2-arylquinolines and tetrahydropyridines from modified Baylis–Hillman adducts
摘要:
We synthesized 2-arylquinolines and tetrahydropyridines via palladium-mediated Heck type reactions starting from the Baylis-Hillman adducts. 2-Arylquinolines were prepared via the Heck type cyclization followed by concomitant aerobic oxidation. (c) 2008 Elsevier Ltd. All rights reserved.
A new approach to construct 2,3-disubstituted quinolines is described via Pd-catalyzed oxidative cyclization of o-vinylanilines and alkynes with molecular oxygen. This transformation is supposed to undergo intermolecular amination of alkyne, insertion of the olefin, and oxidative cleavage of C–C bond sequence.
A series of substituted quinolines was prepared from arylamines, aldehydes, and terminal olefins (see scheme). The palladium‐catalyzed sequentialformation of CCbonds proceeds smoothly with both electron‐deficient and electron‐rich olefins. When acrylic acid is used as terminal olefin, decarboxylation occurs to provide 2‐substituted quinolines.
An efficient method for the synthesis of substituted quinolines is described. By FeCl3-promoted C–C bond formation, 2,3-disubstituted and 2,3,4-trisubstituted quinolines were successfully synthesized from the reaction between imines and electron-deficient alkynes in good yields. The reaction can also be performed in a sequential three-component manner by using aromatic amines and aromatic aldehydes
Copper-Catalyzed Tandem Reaction of Enamino Esters with <i>ortho</i>
-Halogenated Aromatic Carbonyls: One-Pot Approach to Functionalized Quinolines
作者:Fei Peng、Jin Liu、Lili Li、Zhiwei Chen
DOI:10.1002/ejoc.201701472
日期:2018.2.7
tandem reaction was developed for the efficientsynthesis of functionalized quinolones. The C–Cbondformation and C–N coupling reaction of enamino esters and ortho‐halogenated aromatic carbonyl compounds gave products in moderate to good yields. A successful gram‐scale protocol and synthesis of a thieno[3,2‐b]pyridine derivative show further applications of this approach.
为了有效合成功能化喹诺酮,开发了铜催化串联反应。烯氨基酯与邻卤代芳族羰基化合物的C–C键形成和C–N偶联反应使产物收率适中至良好。成功的克级规程和噻吩并[3,2- b ]吡啶衍生物的合成表明了该方法的进一步应用。
Controlled and Efficient Synthesis of Quinoline Derivatives from Morita–Baylis–Hillman Adducts by Palladium-Catalyzed Heck Reaction and Cyclization
An efficientsynthesis of 2,3-disubstituted quinoline derivatives from easily accessible (het)aryl-substituted Morita–Baylis–Hillman (MBH) adducts was achieved by an approach involving a palladium-catalyzed Heck reaction and cyclization. This strategy converts the MBH adducts into α-benzyl β-keto ester derivatives that can cyclize into the corresponding quinolines in good yields.