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
Cu-Catalyzed Oxidative 3-Amination of Indoles via Formation of Indolyl(aryl)iodonium Imides Using o-Substituted (Diacetoxyiodo)arene as a High-Performance Hypervalent Iodine Compound
作者:Kazuhiro Watanabe、Katsuhiko Moriyama
DOI:10.3390/molecules24061147
日期:——
An oxidative 3-amination of indole derivatives using hypervalent iodine(III) and bissulfonimides, which proceeds via the formation of indolyl(aryl)iodonium imides, was developed. This reaction was followed by an indole-selective copper-catalyzed oxidativeC–Ncoupling reaction to obtain 3-amino indole derivatives as single regioisomers. o-Alkoxy(diacetoxyiodo)arenes showed higher reactivity in the
Regioselective C<sub>sp2</sub>–H dual functionalization of indoles using hypervalent iodine(<scp>iii</scp>): bromo-amination via 1,3-migration of imides on indolyl(phenyl)iodonium imides
作者:Katsuhiko Moriyama、Kazuma Ishida、Hideo Togo
DOI:10.1039/c4cc09077b
日期:——
A regioselectiveC(sp(2))-H dual functionalization of indoles, which underlies bromo-amination via the 1,3-migration of imide groups on indolyl(phenyl)iodonium imides as novel imide-combined hypervalent iodines(III), has been developed to provide 2-bis(sulfonyl)amino-3-bromo-indoles under the metal-free conditions.
Ruthenium(II)-Catalyzed Direct C7-Selective Amidation of Indoles with Dioxazolones at Room Temperature
作者:Yaoguang Sheng、Jianmin Zhou、Yi Gao、Bingbing Duan、Yi Wang、Aleksandr Samorodov、Guang Liang、Qiuhua Zhao、Zengqiang Song
DOI:10.1021/acs.joc.0c02779
日期:2021.2.5
A protocol for the preparation of 7-amido indoles via regioselective C–H bond functionalization has been first accomplished under Ru(II) catalysis. Indole derivatives and 4-aryl/heteroaryl/benzyl/alkyl dioxzaolines containing various substituents were applicable for this transformation, readily providing the amidated indoles in moderate to good yields. This novel process has many advantages, including
Stoichiometric Photochemical Carbene Transfer by Bamford–Stevens Reaction
作者:Sripati Jana、Fang Li、Claire Empel、Dennis Verspeek、Polina Aseeva、Rene M. Koenigs
DOI:10.1002/chem.201904994
日期:2020.2.26
of the reaction partner and thus impacts on the reaction efficiency. Herein, we describe a protocol that takes advantage of the in situ generation of donor-acceptor diazoalkanes by Bamford-Stevens reaction. Following this strategy, the concentration of the diazoalkane reaction partner can be minimized to reduce unwanted side reactions and to now conduct photochemical carbene transfer reactions under