One-pot sequential reaction to 2-substituted-phenanthridinones from N-methoxybenzamides
作者:Dongdong Liang、Deanna Sersen、Chao Yang、Jeffrey R. Deschamps、Gregory H. Imler、Chao Jiang、Fengtian Xue
DOI:10.1039/c7ob00649g
日期:——
The sequential use of a hypervalent iodine reagent leads to the one-pot synthesis of 2-bromo/chloro-phenanthridinones via an amidation of arenes followed by a regioselective halogenation reaction. These consecutive C–H functionalization reactions can be used efficiently to construct 2-substituted-phenanthridinones at room temperature with good to high yields. Application of the current method is highlighted
Tetrabutylammonium Iodide (TBAI) Catalyzed Electrochemical C–H Bond Activation of 2-Arylated N-Methoxyamides for the Synthesis of Phenanthridinones
作者:Bhalchandra M. Bhanage、Kripa Subramanian、Subhash L. Yedage、Kashish Sethi
DOI:10.1055/a-1467-5585
日期:2021.6
An electrochemical method for the synthesis of phenanthridinones through constant-potential electrolysis (CPE) mediated by Bu4NI (TBAI) is reported. The protocol is metal and oxidant free, and proceeds with 100% current efficiency. TBAI plays a dual role as both a redox catalyst and a supporting electrolyte. The intramolecular C–H activation proceeds under mild reaction conditions and with a short
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。
Annulation of Benzamides with Arynes Using Palladium with Photoredox Dual Catalysis
作者:Jie Zhao、Hongji Li、Pinhua Li、Lei Wang
DOI:10.1021/acs.joc.9b00893
日期:2019.7.19
Efficient annulation of benzamides with arynes using palladium and photoredox dual catalysis under an oxygen atmosphere is disclosed, which circumvents the use of external toxic metal oxidant and proceeds readily via aryne insertion at room temperature to construct the phenanthridinone backbone.