Copper-Catalyzed Regioselective Cascade Alkylation and Cyclocondensation of Quinoline <i>N</i>
-Oxides with Diazo Esters: Direct Access to Conjugated π-Systems
作者:Aniruddha Biswas、Ujjwal Karmakar、Arun Pal、Rajarshi Samanta
DOI:10.1002/chem.201602493
日期:2016.9.19
An inexpensive copper‐catalyzed cascade regioselective alkylation, followed by cyclocondensation of quinoline N‐oxides with α‐diazo esters has been achieved successfully to provide heteroarene‐containing conjugated π‐systems. The developed method is simple, straightforward, and economical with a broad range of substrate scope. The dual role of copper catalyst in the C−H bond functionalization and in
已经成功实现了廉价的铜催化级联区域选择性烷基化,然后将喹啉N-氧化物与α-重氮酯进行环缩合,从而提供了含杂芳烃的共轭π系统。所开发的方法简单,直接且经济,具有广泛的基板范围。探索了铜催化剂在CH键功能化和路易斯酸促进的环化中的双重作用。