Ligand-Controlled Chemoselective One-Pot Synthesis of Dibenzothiazepinones and Dibenzoxazepinones via Twice Copper-Catalyzed Cross-Coupling
作者:Yanyu Chen、Qiujun Peng、Rong Zhang、Jian Hu、Yijun Zhou、Lanting Xu、Xianhua Pan
DOI:10.1055/s-0036-1558959
日期:2017.6
from 2-bromobenzamides and 2-bromo(thio)phenols via twice copper-catalyzed couplings to afford dibenzothiazepines and dibenzoxazepinones has been developed. High levels of yield and chemoselectivity are achieved in a single-pot reaction by using an appropriate ligand. Moreover, this facile methodology allows rapid access to a variety of bioactive compounds and known psychotropic drug, which should
A novel synthetic pathway to approach 3-(imino)isoindolin-1-ones by the Co-catalyzed cyclization reaction of 2-bromobenzamides with carbodiimides has been developed. This catalytic reaction can tolerate a variety of substituents and provide corresponding products in moderate yields for most cases. According to the literature, the reaction mechanism is proposed through the formation of a five-membered
A practical and operationally simple hydrodehalogenation of halogenated carboxylic acid derivatives using a DMSO/HCOONa·2H2O system is developed. This protocol avoids the involvement of light irradiation, electrochemical apparatus, transition metals, radical initiators, strong bases, and other additional additives. Control experiments suggest that HCOONa might function as a hydride donor in the reduction
开发了使用 DMSO/HCOONa·2H 2 O 系统对卤代羧酸衍生物进行实用且操作简单的加氢脱卤。该协议避免了光照射、电化学装置、过渡金属、自由基引发剂、强碱和其他附加添加剂的参与。对照实验表明,HCOONa 可能在通过亲核取代或加成实现加氢脱卤的还原过程中充当氢化物供体。
Construction of Phenanthridinone Skeletons through Palladium-Catalyzed Annulation
作者:Xin Geng、Heng He、Andrey Shatskiy、Elena V. Stepanova、Gregory R. Alvey、Jian-Quan Liu、Markus D. Kärkäs、Xiang-Shan Wang
DOI:10.1021/acs.joc.3c01429
日期:2023.9.1
Herein, a straightforward synthetic approach for the construction of phenanthridin-6(5H)-one skeletons is disclosed. The developed protocol relies on palladium catalysis, providing controlled access to a range of functionalized phenanthridin-6(5H)-ones in 59–88% yields. Furthermore, plausible reaction pathways are proposed based on mechanistic experiments.
本文公开了构建菲啶-6(5 H )-酮骨架的简单合成方法。所开发的方案依赖于钯催化,以 59-88% 的产率提供一系列功能化菲啶-6(5 H )-酮的受控访问。此外,基于机械实验提出了合理的反应途径。
Practical Synthesis of Phenanthridinones by Palladium-Catalyzed One-Pot C-C and C-N Coupling Reaction: Extending the Substrate Scope to<i>o</i>-Chlorobenzamides
domino reaction proceeds through a sequential C–C and C–N bond-formation process in one pot. This protocol exhibits broad substratescope and affords a series of phenanthridinones in up to 93 % yield. Importantly, the protocol could also be applied for the less reactive o-chlorobenzamides. The approach constitutes the first example of the synthesis of phenanthridinones from this kind of substrate. Moreover