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
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。
Strain-Promoted Oxidative Annulation of Arynes and Cyclooctynes with Benzamides: Palladium-Catalyzed C–H/N–H Activation for the Synthesis of <i>N</i>-Heterocycles
Strained alkynes include arynes and cyclooctynes reacted with N-methoxyamides through palladium-catalyzed C-H/N-H activation for the first time. A variety of important N-heterocycles such as phenanthridinones and isoquinolones were constructed in one step with high efficiency.
One-Pot Formation of CC and CN Bonds through Palladium-Catalyzed Dual CH Activation: Synthesis of Phenanthridinones
作者:Guan-Wu Wang、Ting-Ting Yuan、Dan-Dan Li
DOI:10.1002/anie.201005874
日期:2011.2.7
Two cycles in one pot! The synthesis of biologically important phenanthridinones has been achieved by the one‐pot formation of CC and CN bonds through a palladium‐catalyzed dual CHactivation, which involves four bond ruptures and two bond formations (see scheme). The conversion of phenanthridinones into natural product like derivatives further demonstrates the utility of this synthetic achievement