Regioselective Introduction of Heteroatoms at the C-8 Position of Quinoline <i>N</i>-Oxides: Remote C–H Activation Using <i>N</i>-Oxide as a Stepping Stone
Reported herein is the metal-catalyzed regioselective C-H functionalization of quinoline N-oxides at the 8-position: direct iodination and amidation were developed using rhodium and iridium catalytic systems, respectively. Mechanistic study of the amidation revealed that the unique regioselectivity is achieved through the smooth formation of N-oxide-chelated iridacycle and that an acid additive plays
Regioselective C−H Functionalization of Heteroarene
<i>N</i>
‐Oxides Enabled by a Traceless Nucleophile
作者:Gangadhar Rao Mathi、Byeongseok Kweon、Yonghoon Moon、Yujin Jeong、Sungwoo Hong
DOI:10.1002/anie.202010597
日期:2020.12.7
simultaneous C8‐functionalization of quinolines at room temperature. Experimental and computational studies support the traceless operation of a nucleophile, which enables the previously inaccessible transformation of N‐alkenoxyheteroarenium salts. Remarkably, the generality of this strategy has been further demonstrated by broad applications in the regioselectiveC−Hfunctionalization of other electron‐deficient