Scalable Photoelectrochemical Dehydrogenative Cross‐Coupling of Heteroarenes with Aliphatic C−H Bonds
作者:Pin Xu、Peng‐Yu Chen、Hai‐Chao Xu
DOI:10.1002/anie.202005724
日期:2020.8.17
of heteroarenes and C(sp3)−H donors through H2 evolution, without the addition of metal catalysts or chemical oxidants. Mechanistically, the C(sp3)−H donor is converted to a nucleophilic carbon radical through H‐atom transfer with chlorine atom, which is produced by light irradiation of anodically generated Cl2 from Cl−. The carbon radical then undergoes radical substitution to the heteroarene to afford
Herein, we report a mild and efficient hydroxymethylation of quinolines via an iron promoted cross-dehydrogenativecouplingreaction under external acid free conditions. Various hydroxyalkyl substituted quinolines were achieved in excellent yields with well tolerated functional groups. Importantly, a few of the hydroxylmethylated quinolines were further transformed into respective aldehydes, and were
This invention is directed to novel imidazole and imidazoline derivatives which are selective agonists for cloned human &agr;2 adrenergic receptors. This invention is also related to the use of these compounds for the treatment of any disease where modulation of the &agr;2 receptors may be useful. The invention further provides for a pharmaceutical composition comprising a therapeutically effective amount of the above-defined compounds and a pharmaceutically acceptable carrier.
catalysis and hydrogen atom transfer to achieve the alkylation of 2H-benzothiazoles with alcohols, ethers, lactams, amides and alkane, which features broad substrate scope and excellent functional group compatibility. Notably, alcohols can be used not only as hydroxyalkylating reagents, but also as dehydroxyalkylating reagents in this regulable alkylation protocol. The previous elusive self-photocatalytic
Minisci-Type Dehydrogenative Coupling of N-Heteroaromatic Rings with Inert C(sp<sup>3</sup>)–H Enabled by a Visible-Light-Catalyzed Intermolecular Hydrogen Atom Transfer Process
作者:Jun-Feng Yang、Yun-Fei Liu、Lin-Lin Wei、Kai-Kai Qiao、Yan-Qiu Zhao、Lei Shi
DOI:10.1021/acs.joc.4c00093
日期:2024.3.15
The Minisci-type dehydrogenative coupling of N-heteroaromatic rings with inert C–H or Si–H partners via visible-light-catalyzed hydrogen atom transfer has been reported. This methodology allows the coupling reactions to be carried out in water as a solvent under air atmospheric conditions with visible-light illumination. A wide range of inert C–H and Si–H partners could be directly coupled with various