Highly Chemoselective Deoxygenation of N-Heterocyclic <i>N</i>-Oxides Using Hantzsch Esters as Mild Reducing Agents
作者:Ju Hyeon An、Kyu Dong Kim、Jun Hee Lee
DOI:10.1021/acs.joc.0c02805
日期:2021.2.5
Herein, we disclose a highly chemoselective room-temperature deoxygenation method applicable to various functionalized N-heterocyclic N-oxides via visible light-mediated metallaphotoredox catalysis using Hantzsch esters as the sole stoichiometric reductant. Despite the feasibility of catalyst-free conditions, most of these deoxygenations can be completed within a few minutes using only a tiny amount
Rhodium-catalyzed regioselective C8-H amination of quinoline<i>N</i>-oxides with trifluoroacetamide at room temperature
作者:Chang You、Tingting Yuan、Yanzhen Huang、Chao Pi、Yangjie Wu、Xiuling Cui
DOI:10.1039/c8ob01108g
日期:——
A facile and efficient protocol for rhodium-catalyzed amination of quinoline N-oxides at the C-8 position using simple and commercially available trifluoroacetamide as the amino source has been developed, which proceeds with perfect regioselectivity at room temperature and short reaction times. This catalytic system is highly convenient on a gram scale. The desired products feature diverse functional