Expeditious Synthesis of Phenanthridines from Benzylamines via Dual Palladium Catalysis
摘要:
A method for the synthesis of phenanthridines from benzylamines and aryl iodides which uses a dual palladium-catalyzed process is developed. The domino sequence ends via an intramolecular amination and an oxidative dehydrogenation. No protecting group or prefunctionalization of the amine is required, and the process uses dioxygen as the terminal oxidant.
<scp>Metal‐Free</scp>
Synthesis of Benzo[
<i>a</i>
]phenanthridines from Aromatic Aldehydes, Cyclohexanones, and Aromatic Amines
作者:Pingyu Jiang、Zhifei Shan、Shanping Chen、Quanyuan Wang、Shuxin Jiang、Haolin Zheng、Guo‐Jun Deng
DOI:10.1002/cjoc.202100670
日期:2022.2
A three-component synthesis of benzo[α]phenanthridines from aromaticaldehydes, cyclohexanones, and aromatic amines has been developed, which is mediated by KI/DMSO/camphorsulfonic acid to afford a variety of functionalized benzo[α]phenanthridines in satisfactory yields. The present strategy provides a biaryl motif ortho to the nitrogen atom which has the potential to be used as ligand by further modification