Site‐Specific C(sp<sup>3</sup>)–H Aminations of Imidates and Amidines Enabled by Covalently Tethered Distonic Radical Anions
作者:Rong Zhao、Kang Fu、Yuanding Fang、Jia Zhou、Lei Shi
DOI:10.1002/anie.202008806
日期:2020.11.9
utilization of N‐centered radicals to synthesize nitrogen‐containing compounds has attracted considerable attention recently, due to their powerful reactivities and the concomitant construction of C−N bonds. However, the generation and control of N‐centered radicals remain particularly challenging. We report a tethering strategy using SOMO‐HOMO‐converted distonic radical anions for the site‐specific
Aniline‐Type Hypervalent Iodine(III) for Intramolecular Cyclization via C−H Bond Abstraction of Hydrocarbons Containing N‐ and O‐Nucleophiles
作者:Yuna Nishiguchi、Katsuhiko Moriyama
DOI:10.1002/adsc.202100316
日期:2021.7
We developed a method for the preparation of (diacetoxyiodo)-2-(N-alkylamido)benzene as an aniline-type hypervalent iodine(III). We also achieved direct cyclizations via C−H bond abstraction, such as the Hofmann-Löffler-Freytag reaction, a direct amination, and a direct lactonization, using the aniline-type hypervalent iodine(III) to obtain corresponding products in high yields.
Radical cascade synthesis of azoles <i>via</i> tandem hydrogen atom transfer
作者:Andrew D. Chen、James H. Herbort、Ethan A. Wappes、Kohki M. Nakafuku、Darsheed N. Mustafa、David A. Nagib
DOI:10.1039/c9sc06239d
日期:——
A radical cascade enables rapid, modular access to five-membered heteroarenes, including oxazoles and imidazoles, through a regio- and chemo-selective β C–H bis-functionalization.
Merging Photochemistry with Electrochemistry: Functional‐Group Tolerant Electrochemical Amination of C(sp
<sup>3</sup>
)−H Bonds
作者:Fei Wang、Shannon S. Stahl
DOI:10.1002/anie.201813960
日期:2019.5.6
interest in the realm of C-H functionalization because of the prevalence of nitrogen heterocycles and amines in pharmaceuticals and natural products. Reported here is a combined electrochemical/photochemical method for dehydrogenative C(sp3 )-H/N-H coupling that exhibits good reactivity with both sp2 and sp3 N-H bonds. The results show how use of iodide as an electrochemical mediator, in combination