Rh(I)‐Catalyzed Direct C6−H Arylation of 2‐Pyridones with Aryl Carboxylic Acids
作者:Haoqiang Zhao、Jianbin Xu、Xin Xu、Yixiao Pan、Zexin Yu、Lijin Xu、Qinghua Fan、Patrick J. Walsh
DOI:10.1002/adsc.202100596
日期:2021.8.13
Rh(I)-catalyzed C6-selective C−H arylation of 2-pyridones with inexpensive, readily available, safe and structurally diverse aryl carboxylic acids with the aid of a pyridine directing group is developed. This decarbonylative arylation protocol features an easy-to-handle catalytic system, and is amenable to diversely substituted 2-pyridones and aryl carboxylic acids. It allows access to a wide range
Access to Structurally Diverse Quinoline-Fused Heterocycles via Rhodium(III)-Catalyzed C–C/C–N Coupling of Bifunctional Substrates
作者:Songjie Yu、Yunyun Li、Xukai Zhou、He Wang、Lingheng Kong、Xingwei Li
DOI:10.1021/acs.orglett.6b01032
日期:2016.6.17
Rhodium(III)-catalyzed C–H activation of heteroarenes and functionalization with bifunctional substrates such as anthranils allows facile construction of quinoline-fused heterocycles under redox-neutral conditions. The couplings feature broad substrate scope and provide step-economical access to two classes of quinoline-fused condensed heterocycles.
A Rh-catalyzed chelation-assisted C6-selective C–Hactivation/alkylation of 2-pyridones with readily available alkyl carboxylic acids or anhydrides is introduced. The reaction proceeds via substrate decarbonylation. This approach merges C–H functionalization with readily available anhydrides, allowing for the efficient synthesis of various C6-alkylated 2-pyridones with good functional group tolerance
Rhodium-Catalyzed/Copper-Mediated Tandem C(sp<sup>2</sup>)–H Alkynylation and Annulation: Synthesis of 11-Acylated Imidazo[1,2-<i>a</i>:3,4-<i>a</i>′]dipyridin-5-ium-4-olates from 2<i>H</i>-[1,2′-Bipyridin]-2-ones and Propargyl Alcohols
作者:Ting Li、Zhiqiang Wang、Kun Xu、Wenmin Liu、Xu Zhang、Wutao Mao、Yongming Guo、Xiaolin Ge、Fei Pan
DOI:10.1021/acs.orglett.6b00177
日期:2016.3.4
A rhodium-catalyzed/copper-mediated tandem C(sp2)–H alkynylation and intramolecular annulation of 2H-[1,2′-bipyridin]-2-ones with propargyl alcohols for the synthesis of 11-acylated imidazo[1,2-a:3,4-a′]dipyridin-5-ium-4-olates is described.
铑催化/铜介导的串联C(sp 2)-H炔基化反应和2 H- [1,2'-联吡啶] -2-酮与炔丙醇的分子内环化反应,合成11-酰化的咪唑[1,描述了2- a:3,4- a ']双吡啶-5-鎓-4-油酸酯。
Manganese(I)‐Catalyzed Site‐Selective C6‐Alkenylation of 2‐Pyridones Using Alkynes via C−H Activation
作者:Shanhong Wan、Zhenli Luo、Xin Xu、Haiyang Yu、Jiajie Li、Yixiao Pan、Xin Zhang、Lijin Xu、Rui Cao
DOI:10.1002/adsc.202100056
日期:2021.5.18
A Mn(I)-catalyzed chelation-assisted direct C6−H alkenylation of 2-pyridones with both terminal and internal alkynes in a highlyregio- and stereo-selective manner has been developed. The catalytic system consisting of Mn(CO)5Br catalyst and KOAc additive allows 1-(2-pyridyl)-2-pyridones to undergo alkenylation with various terminalalkynes in methyl tert-butyl ether (MTBE) to furnish the C6-alkenylated