C7‐Indole Amidations and Alkenylations by Ruthenium(II) Catalysis
作者:Isaac Choi、Antonis M. Messinis、Lutz Ackermann
DOI:10.1002/anie.202006164
日期:2020.7.20
C7−H‐functionalized indoles are ubiquitous structural units of biological and pharmaceutical compounds for numerous antiviral agents against SARS‐CoV or HIV‐1. Thus, achieving site‐selective functionalizations of the C7−H position of indoles, while discriminating among other bonds, is in high demand. Herein, we disclose site‐selective C7−H activations of indoles by ruthenium(II) biscarboxylate catalysis
A Direct Access to 7-Aminoindoles via Iridium-Catalyzed Mild C–H Amidation of <i>N</i>-Pivaloylindoles with Organic Azides
作者:Youyoung Kim、Juhyeon Park、Sukbok Chang
DOI:10.1021/acs.orglett.6b00662
日期:2016.4.15
Ir(III)-catalyzed regioselective directC-7amidation of indoles in reaction with organic azides has been developed. While its efficiency was varied by the choice of N-directing groups, N-pivaloylindoles were most effective in undergoing the desired amidation at roomtemperature over a broad range of substrates. The reaction was scalable, and deprotection of the chelation group was also facile.
Iridium(<scp>iii</scp>)-catalyzed regioselective C7-sulfonamidation of indoles
作者:Zengqiang Song、Andrey P. Antonchick
DOI:10.1039/c6ob00926c
日期:——
C7-sulfonamidation of indoles with sulfonyl azides is described. The developed method has good compatibility with diverse functional groups, providing various 7-amino-substituted indoles with good to excellent yields in a short time under mild reaction conditions. The key feature of the developed method is the regioselective functionalization at the C7-position of 2,3-unsubstituted indoles. Biologically active
Preparation of Heteroaromatic (Aryl)iodonium Imides as I−N Bond-Containing Hypervalent Iodine
作者:Kazuma Ishida、Hideo Togo、Katsuhiko Moriyama
DOI:10.1002/asia.201601349
日期:2016.12.19
Hypervalent iodine(III) compounds containing iodine–nitrogen bonds are very attractive amination reagents in organic synthesis. Heteroaromatic (aryl)iodonium imidescontaining a iodine–nitrogen bond and a hypervalent iodine(III) atom were prepared from heteroarenes, bis(sulfon)imides and (diacetoxyiodo)arenes under mild conditions. These compounds were stable under air and in organic solvents, and
Copper-Catalyzed Indole-Selective C–N Coupling Reaction of Indolyl(2-alkoxy-phenyl)iodonium Imides: Effect of Substituent on Iodoarene as Dummy Ligand
作者:Kazuhiro Watanabe、Katsuhiko Moriyama
DOI:10.1021/acs.joc.8b02676
日期:2018.12.7
A monoalkoxy phenyl group as a dummy ligand on indolyl(aryl)iodonium imides, which is related to the N–I bonding hypervalent iodine(III) compound, for the copper-catalyzed indole-selective C–N coupling reaction was designed to provide 3-bissulfonimido-indole derivatives in high yields. In particular, the use of indolyl(2-butoxylphenyl)iodonium bissulfonimides indicated the high indole selectivity.