Polyoxometalate Photocatalysis for Liquid-Phase Selective Organic Functional Group Transformations

ACS Catalysis, Год журнала: 2018, Номер 8(11), С. 10809 - 10825

Опубликована: Окт. 8, 2018

Polyoxometalates (POMs), which are anionic metal oxide clusters, have recently attracted considerable attention as photocatalysts because of their unique photoinduced charge-transfer properties, redox acid–base and reactivities. In this Review, we present a summary recent developments in POM photocatalysis for organic synthesis. Various functional group transformations can be selectively induced by photoirradiation the presence catalytic amounts suitably designed POMs. particular, many liquid-phase based on activation substrates decatungstate been reported. However, requires irradiation with UV light large energy gaps between O2–-based highest occupied molecular orbitals (HOMOs) W6+-based lowest unoccupied (LUMOs) therein. strategies developed efforts to utilize visible light, including hybridization photosensitizers, substitution, coordination ligands (substrates) at vacant sites lacunary We also here an overview our work development visible-light-responsive catalysts HOMO- LUMO-engineering both oxidation reduction substrates, amines, alcohols, nitroarenes, sulfides, sulfoxides, pyridine N-oxides.

Язык: Английский

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Photocatalytic regio- and stereoselective C(sp3)–H functionalization of benzylic and allylic hydrocarbons as well as unactivated alkanes

Nature Catalysis, Год журнала: 2019, Номер 2(11), С. 1016 - 1026

Опубликована: Окт. 7, 2019

Язык: Английский

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En Route to Intermolecular Cross-Dehydrogenative Coupling Reactions

The Journal of Organic Chemistry, Год журнала: 2019, Номер 84(20), С. 12705 - 12721

Опубликована: Авг. 23, 2019

Cross-coupling reaction between two C-H bonds has become a fundamental strategy in synthetic organic chemistry. With its increasing importance green chemistry, atom economy, and step development sky-rocketed within the last 20 years, with term "cross-dehydrogenative coupling (CDC)" popularized progressed by group of Li others to describe direct Y-Z bond formations from Y-H Z-H under oxidative conditions. Among all types CDC reactions, C-C are prime building up molecular complexity but their categorization currently remains disarray due wide diversity, resulting frequent display separate topics. In this Perspective, contemporary via activation strategies is presented herein, which could be vital for future designs. mechanism-based discussion, we wish that minireview will help more chemists gain insight into design reactions inspires ideas on topic.

Язык: Английский

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Nickel/Photo-Cocatalyzed Asymmetric Acyl-Carbamoylation of Alkenes

Journal of the American Chemical Society, Год журнала: 2020, Номер 142(5), С. 2180 - 2186

Опубликована: Янв. 23, 2020

An unprecedented asymmetric acyl-carbamoylation of pendant alkenes tethered on aryl carbamic chlorides with both aliphatic and aromatic aldehydes has been developed via the cooperative catalysis a chiral nickel-PHOX complex tetrabutylammonium decatungstate. This reaction represents first example merging hydrogen-atom-transfer photochemistry transition metal in difunctionalization alkenes. Using this protocol, variety oxindoles bearing challenging quaternary stereogenic center are furnished under mild conditions highly enantioselective manner.

Язык: Английский

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Photocatalytic hydrogen atom transfer: the philosopher's stone for late-stage functionalization?

Green Chemistry, Год журнала: 2020, Номер 22(11), С. 3376 - 3396

Опубликована: Янв. 1, 2020

Applications of photocatalytic Hydrogen Atom Transfer (HAT) methodologies for the Late-Stage Functionalization (LSF) complex molecules have been discussed in this perspective.

Язык: Английский

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