Mechanochemical-Cascaded C–N Cross-Coupling and Halogenation Using <i>N</i>-Bromo- and <i>N</i>-Chlorosuccinimide as Bifunctional Reagents
作者:Shyamal Kanti Bera、Prasenjit Mal
DOI:10.1021/acs.joc.1c01742
日期:2021.10.15
gained significant interest from chemists, and mechanochemistry is one of those sources. Herein, we report the use of N-bromosuccinimides (NBS) and N-chlorosuccinimides (NCS) as bifunctional reagents for a cascaded C–Nbond formation and subsequent halogenation reactions. Under the solvent-free mechanochemical (ball-milling) conditions, the synthesis of a wide range of phenanthridinone derivatives from
An efficient method for the one‐pot synthesis of substituted phenanthridinone derivatives from N‐methoxybenzamides and aryltriethoxysilanes through rhodium‐catalyzed dual CHbondactivation and annulation reactions is described. A double‐cycle mechanism is proposed to account for this catalytic reaction. In addition, isotope‐labeling studies were performed to understand the intimate mechanism of the
Iodobenzene-Catalyzed Synthesis of Phenanthridinones via Oxidative C–H Amidation
作者:Dongdong Liang、Wenbo Yu、Nam Nguyen、Jeffrey R. Deschamps、Gregory H. Imler、Yue Li、Alexander D. MacKerell、Chao Jiang、Fengtian Xue
DOI:10.1021/acs.joc.7b00106
日期:2017.4.7
synthesis of phenanthridinones from N-methoxybenzamides using an oxidative C–H amidation reaction at room temperature in open air with modest to excellent yields. This method demonstrated unprecedented substrate scope. In particular, it solved the long-standing challenge in the synthesis of phenanthridinones with stericallydemanding substitutions.
A highly efficient Pd-catalyzed decarboxylative ortho-arylation of amides with aryl acylperoxides
作者:Dengke Li、Ning Xu、Yicheng Zhang、Lei Wang
DOI:10.1039/c4cc06457g
日期:——
A Pd-catalyzed decarboxylative ortho-arylation of amides with aryl acylperoxides was developed. Anilides afforded ortho-arylation products, and N-methoxyarylamides gave phenanthridinones.
General solution: An efficient rhodium‐catalyzed dual CH bond activation and cyclization of N‐methoxybenzamides 1 with aryl boronic acids 2 (see scheme; Cp*=Me5C5) provides a straightforward and general approach to the phenanthridinone structure, which occurs widely in natural products and drugs. Highly regioselective CC and CN bond formation under mild conditions afforded a wide range of substituted
通用解决方案:有效的铑催化的双CH键活化和N-甲氧基苯甲酰胺1与芳基硼酸2的环化(参见方案; Cp * = Me 5 C 5)提供了一种直接而通用的方法用于菲咯啶酮结构,广泛存在于天然产物和药物中。在温和条件下形成高度区域选择性的CC和CN键可提供广泛的取代菲啶酮3。