Rh(NHC)-Catalyzed Direct and Selective Arylation of Quinolines at the 8-Position
摘要:
A new catalytic protocol for the regioselective direct arylation of quinoline derivatives at the 8-position has been developed. The reaction is catalyzed by a Rh(NHC) system, and the choice of the NHC ligand was most important for achieving high reactivity and selectivity.
Pincer-Nickel-Catalyzed Cross-Coupling of Aryl Sulfamates with Arylzinc Chlorides
作者:Jian-Long Tao、Zhong-Xia Wang
DOI:10.1002/ejoc.201500987
日期:2015.9
The nickel N,N,N-pincer complex 2 was demonstrated to effectively catalyze the cross-coupling of arylsulfamates with arylzincchlorides under mild conditions. The reaction is suitable for a wide range of substrates, and tolerates various functional groups.
Regioselective C-H functionalization on quinolines is of high interest to lead to value-added products. Herein, we describe the development of Ru-catalyzed deoxygenative regioselective C8 arylation of quinoline N-oxides with arylboronic esters. Mechanistic studies revealed that it proceeds in a tandem process of arylation and then deoxygenation, wherein both steps were found to be catalytic with the