Rh-Catalyzed Construction of Quinolin-2(1H)-ones via C–H Bond Activation of Simple Anilines with CO and Alkynes
摘要:
A novel and efficient Rh-catalyzed Carbonylation and annulation of simple anilines with CO and alkynes through N-H and CH bond activation for the direct synthesis of quinolin-2(1H)-ones has been developed. Simple anilines without preactivation, broad substrate scope with hetero/polycycles, and high-value products make this protocol very-practical and attractive. A key rhodacycle complex was isolated and well-characterized.
Rh-catalyzed aerobic oxidative cyclization of anilines, alkynes, and CO
作者:Xinyao Li、Jun Pan、Hao Wu、Ning Jiao
DOI:10.1039/c7sc02181j
日期:——
Transition-metal-catalyzed oxidative C-H cyclization of anilines has been an attractive and powerful strategy for the efficient construction of N-heterocycles. However, the primary and tertiary anilines are rarely employed in this strategy due to the relatively unstability with strong oxidants or the presence of three C-N bonds. By using aerobic oxidative protocol, we describe here a novel Rh-catalyzed
straightforward synthesis of halogen‐containing quinolin‐2(1H)‐ones. The reaction proceeds without preactivation and directing groups through direct N–H and C–H bondactivation with a broad substrate scope and high efficiency. Halogen functional groups can be well tolerated here. Remarkably, this is the first example of an iridium‐catalyzed carbonylative C–H activation of anilines.
Ligand-Enabled Ni–Al Bimetallic Catalysis for Nonchelated Dual C–H Annulation of Arylformamides and Alkynes
作者:Yin-Xia Wang、Feng-Ping Zhang、Yu-Xin Luan、Mengchun Ye
DOI:10.1021/acs.orglett.0c00432
日期:2020.3.20
A bifunctional secondary phosphine oxide (SPO) ligand-controlled method was developed for Ni-Al-catalyzed nonchelated dual C-H annulation of arylformamides with alkynes, providing a series of substituted amide-containing heterocycles in <= 97% yield. The SPO-bound bimetallic catalysis proved to be critical to the reaction efficiency.
Iridium-Catalyzed Annulation of <i>N</i>-Arylcarbamoyl Chlorides with Internal Alkynes
An iridium complex successfully catalyzed the annulation of various N-arylcarbamoyl chlorides with internal alkynes to afford 2-quinolones in good to excellent yields. The present reaction is widely applicable to substrates with various functionalities. An amide-iridacycle complex was isolated, and it is likely that such an iridacycle species is a key intermediate in the catalytic reaction.
Rh-Catalyzed Construction of Quinolin-2(1<i>H</i>)-ones via C–H Bond Activation of Simple Anilines with CO and Alkynes
作者:Xinyao Li、Xinwei Li、Ning Jiao
DOI:10.1021/jacs.5b05843
日期:2015.7.29
A novel and efficient Rh-catalyzed Carbonylation and annulation of simple anilines with CO and alkynes through N-H and CH bond activation for the direct synthesis of quinolin-2(1H)-ones has been developed. Simple anilines without preactivation, broad substrate scope with hetero/polycycles, and high-value products make this protocol very-practical and attractive. A key rhodacycle complex was isolated and well-characterized.