Visible Light-Promoted Aliphatic C–H Arylation Using Selectfluor as a Hydrogen Atom Transfer Reagent
作者:Hong Zhao、Jian Jin
DOI:10.1021/acs.orglett.9b01635
日期:2019.8.16
A mild, practical method for direct arylation of unactivated C(sp3)–H bonds with heteroarenes has been achieved via photochemistry. Selectfluor is used as a hydrogen atom transfer reagent under visible light irradiation. A diverse range of chemical feedstocks, such as alkanes, ketones, esters, and ethers, and complex molecules readily undergo intermolecular C(sp3)–C(sp2) bond formation. Moreover, a
we describe the successful arylation of unactivated alkanes with heteroarenes by using iridium polypyridyl complexes as the photocatalyst and persulfate as the HAT catalyst precursor under visible-light irradiation. This reaction features good functional group tolerance and broad scope with regard to both alkane and heteroarene substrates (37 examples), which allows direct access to alkyl-substituted
Direct Selective Oxidative Cross-Coupling of Simple Alkanes with Heteroarenes
作者:Andrey P. Antonchick、Lars Burgmann
DOI:10.1002/anie.201209584
日期:2013.3.11
A dream reaction: An efficient and practical method for the oxidative cross‐coupling of heteroaromatic compounds and simplealkanes has been developed. The desired products are smoothly and regioselectively formed under mild reaction conditions at ambient temperature in a hypervalent‐iodine‐mediated transformation. The method allows for preferential transformation of stronger CH bonds in the presence
Photocatalytic Aerobic Coupling of Azaarenes and Alkanes via Nontraditional Cl<sup>•</sup> Generation
作者:Manotosh Bhakat、Bitasik Khatua、Joyram Guin
DOI:10.1021/acs.orglett.2c01784
日期:2022.7.29
photocatalytic generation of Cl• from a common chlorinated solvent, dichloroethane, under aerobic conditions and its successful utilization toward the cross-dehydrogenative coupling of alkanes and azaarenes via hydrogen atom transfer with Cl•. The process is free from chloride salt, toxic oxidant, and UV light. It is applicable to a broad spectrum of substrates. The proposed mechanism involving Cl• is
This work presents a scalable and mild strategy for aliphatic C–H arylation with heteroarenes under metal-free, photocatalyst-free and strong oxidant-free conditions.