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2 article(s) from Zhang, Yajing

Visible-light-mediated copper photocatalysis for organic syntheses

Yajing Zhang,
Qian Wang,
Zongsheng Yan,
Donglai Ma and
Yuguang Zheng

Beilstein J. Org. Chem. 2021, 17, 2520–2542, doi:10.3762/bjoc.17.169

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Graphical Abstract

Scheme 1: Photoredox catalysis mechanism of [Ru(bpy)₃]²⁺.

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Scheme 2: Photoredox catalysis mechanism of Cu^I.

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Scheme 3: Ligands and Cu^I complexes.

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Scheme 4: Mechanism of Cu^I-based photocatalysis.

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Scheme 5: Mechanisms of Cu^I–substrate complexes.

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Scheme 6: Mechanism of Cu^II-base photocatalysis.

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Scheme 7: Olefinic C–H functionalization and allylic alkylation.

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Scheme 8: Cross-coupling of unactivated alkenes and CF₃SO₂Cl.

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Scheme 9: Chlorosulfonylation/cyanofluoroalkylation of alkenes.

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Scheme 10: Hydroamination of alkenes.

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Scheme 11: Cross-coupling reaction of alkenes, alkyl halides with nucleophiles.

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Scheme 12: Cross-coupling of alkenes with oxime esters.

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Scheme 13: Oxo-azidation of vinyl arenes.

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Scheme 14: Azidation/difunctionalization of vinyl arenes.

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Scheme 15: Photoinitiated copper-catalyzed Sonogashira reaction.

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Scheme 16: Alkyne functionalization reactions.

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Scheme 17: Alkynylation of dihydroquinoxalin-2-ones with terminal alkynes.

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Scheme 18: Decarboxylative alkynylation of redox-active esters.

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Scheme 19: Aerobic oxidative C(sp)–S coupling reaction.

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Scheme 20: Copper-catalyzed alkylation of carbazoles with alkyl halides.

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Scheme 21: C–N coupling of organic halides with amides and aliphatic amines.

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Scheme 22: Copper-catalyzed C–X (N, S, O) bond formation reactions.

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Scheme 23: Arylation of C(sp²)–H bonds of azoles.

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Scheme 24: C–C cross-coupling of aryl halides and heteroarenes.

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Scheme 25: Benzylic or α-amino C–H functionalization.

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Scheme 26: α-Amino C–H functionalization of aromatic amines.

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Scheme 27: C–H functionalization of aromatic amines.

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Scheme 28: α-Amino-C–H and alkyl C–H functionalization reactions.

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Scheme 29: Other copper-photocatalyzed reactions.

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Scheme 30: Cross-coupling of oxime esters with phenols or amines.

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Scheme 31: Alkylation of heteroarene N-oxides.

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Review

Published 12 Oct 2021

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Silver-catalyzed synthesis of β-fluorovinylphosphonates by phosphonofluorination of aromatic alkynes

Yajing Zhang,
Qingshan Tian,
Guozhu Zhang and
Dayong Zhang

Beilstein J. Org. Chem. 2020, 16, 3086–3092, doi:10.3762/bjoc.16.258

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Scheme 1: Metal-catalyzed difunctionalization of unsaturated carbon–carbon bonds.

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Scheme 2: Substrate scope for the synthesis of the β-fluorovinylphosphonates 2 using diethyl phosphite. React...

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Scheme 3: Substrate scope for the synthesis of the β-fluorovinylphosphonates 3 using dimethyl phosphite. Reac...

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Scheme 4: Radical-trapping experiments.

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Scheme 5: Proposed mechanism for the silver-catalyzed phosphonofluorination of alkynes.

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Scheme 6: Attempted use of a suspected phosphonofluorination intermediate to synthesize a β-fluorovinylphosph...

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Full Research Paper

Published 18 Dec 2020

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