Cu-Catalyzed Stereoselective γ-Alkylation of Enones
作者:Xiaohong Chen、Xiaoguang Liu、Justin T. Mohr
DOI:10.1021/jacs.6b02565
日期:2016.5.25
This method constitutes a novel approach to the challenging 1,6-dioxygenation motif. A range of γ-substituted enones, including many bearing all-carbon quaternary centers, are available through a simple protocol under mild reaction conditions with superb functional group compatibility. Excellent stereoinduction is observed providing controlled access to challenging stereochemical arrays.
Rhodium-Catalyzed Denitrogenative [3+2] Cycloaddition: Access to Functionalized Hydroindolones and the Framework of Montanine-Type<i>Amaryllidaceae</i>Alkaloids
denitrogenative [3+2] cycloaddition of 1‐sulfonyl‐1,2,3‐triazoles with cyclic silyl dienol ethers has been developed for the synthesis of functionalized hydroindolones or their corresponding silyl ethers. The present method has been employed to construct synthetically valuable bicyclo[3.3.1]alkenone derivatives and pyrrolidine‐ring‐containing bicyclic indole compounds. As a further synthetic application, a stereoselective
Cu-Catalyzed Intermolecular γ-Site C–H Amination of Cyclohexenone Derivatives: The Benefit of Bifunctional Ligands
作者:Xin Zhao、Fang Yang、Shao-Yu Zou、Qian-Qian Zhou、Zi-Sheng Chen、Kegong Ji
DOI:10.1021/acscatal.1c05439
日期:2022.2.4
Utilizing 1,10-phenanthroline-type bifunctional ligands, an efficient Cu-catalyzed intermolecular site-selective remote C–H amination using cyclohexenonederivatives and anilines was realized. The amide group installed on the bifunctional ligand played a key role in stabilizing the N-centered radical generated in situ to realize C–N-directed formation. Meanwhile, a useful catalytic system for site-selective
利用 1,10-菲咯啉型双功能配体,实现了使用环己烯酮衍生物和苯胺的高效铜催化分子间位点选择性远程 C-H 胺化。安装在双功能配体上的酰胺基团在稳定原位产生的 N 中心自由基以实现 C-N 定向形成方面发挥了关键作用。同时,建立了一个有用的催化体系,用于位点选择性分子间远程γ-C-H胺化对氨基苯酚和γ-胺化烯酮。这种使用氧气作为终端氧化剂的经济实用方法温和且环保。
Regiocontrolled Oxidative C–C Coupling of Dienol Ethers and 1,3-Dicarbonyl Compounds
作者:Xiaoguang Liu、Xiaohong Chen、Justin T. Mohr
DOI:10.1021/acs.orglett.6b01397
日期:2016.7.1
strategy for synthesis of γ-alkylated enones through oxidative coupling of siloxydienes and 1,3-dicarbonyl compounds is reported. This method is an interrupted form of our formal [3 + 2] cycloaddition method reported previously. The present work excels in generating all-carbon quaternary centers via C–C bondformation at the remote γ-site which is traditionally challenging to functionalize. Stereoselectivity