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
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.
Divergent Synthesis of Quinolines: Exploiting the Duality of Free Radicals
作者:Runwei Jiao、Xuhong Ren、Xiheng Li、Shitao Sun、Hao Zhu、Bin Lin、Huiming Hua、Dahong Li、Xinhua He
DOI:10.1021/acs.orglett.3c03490
日期:2024.1.12
Herein, we present a green scheme for the divergent synthesis of two polysubstituted quinolines from a singular substrate via exploiting free-radical duality. Photocatalytically generated imine radicals produce 3,4-disubstituted quinolines via a novel rearrangement in the presence of an inorganic base. Alternatively, they react in the presence of an organic base to furnish 2,3-disubstituted quinolines