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3 article(s) from Fuhr, Olaf

Selectivity control towards CO versus H₂ for photo-driven CO₂ reduction with a novel Co(II) catalyst

Lisa-Lou Gracia,
Philip Henkel,
Olaf Fuhr and
Claudia Bizzarri

Beilstein J. Org. Chem. 2023, 19, 1766–1775, doi:10.3762/bjoc.19.129

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Figure 1: Chemical structures of the molecular components used in this work: Co(II) complex 1 as the novel ca...

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Figure 2: ORTEP drawing of crystal polymorph 1a (left) and 1b (right), shown at the 50% probability level. Hy...

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Figure 3: UV–vis absorbance of complex 1 in DMA. Inset: zoom-in of the 500–800 nm range to visualize the low-...

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Figure 4: Cyclic voltammetry of complex 1 in 0.1 M TBAPF₆ solution of (a) DMA and (b) DMA/TEOA 5:1 (v/v). Bla...

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Figure 5: Time evolution of CO (blue squares) and H₂ (red triangles) with the power functional fitting (blue ...

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Scheme 1: Proposed mechanism for the photoinduced reduction of carbon dioxide with the system presented in th...

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Published 17 Nov 2023

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Scope of tetrazolo[1,5-a]quinoxalines in CuAAC reactions for the synthesis of triazoloquinoxalines, imidazoloquinoxalines, and rhenium complexes thereof

Laura Holzhauer,
Chloé Liagre,
Olaf Fuhr,
Nicole Jung and
Stefan Bräse

Beilstein J. Org. Chem. 2022, 18, 1088–1099, doi:10.3762/bjoc.18.111

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Scheme 1: Reactions of tetrazoloquinoxalines 1 to 1,2,3-triazoloquinoxalines 3 via CuAAC and denitrogenative ...

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Scheme 2: Synthesis of tetrazolo[1,5-a]quinoxalines. Reaction conditions: (a) 9, THF or 4 M HCl, 70–110 °C, 2...

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Scheme 3: Synthesis of 1,2,3-triazole-substituted quinoxalines via CuAAC from tetrazolo[1,5-a]quinoxaline (11a...

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Scheme 4: Mechanism of CuAAC vs denitrogenative annulation.

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Scheme 5: Synthesis of bis(tetrazolo)[1,5-a:5',1'-c]quinoxaline (24) and conversion to triazoloimidazoquinoxa...

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Scheme 6: Synthesis of rhenium tricarbonyl complexes 27a–d and ORTEP diagrams of the resulting molecular stru...

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Scheme 7: Synthesis of rhenium tricarbonyl complex 29 and ORTEP diagram of the resulting molecular structure ...

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Scheme 8: Synthesis of a TIQ rhenium complex and ORTEP diagram of the obtained product 30 with the thermal el...

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Figure 1: UV–vis absorption spectra of the obtained metal complexes (18 µM solutions) in acetonitrile at 20 °...

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Figure 2: Cyclic voltammetry traces for rhenium complexes 27a–d, 29 and 30: 0.5 mM in MeCN solution with 0.1 ...

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Published 24 Aug 2022

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Insertion of [1.1.1]propellane into aromatic disulfides

Robin M. Bär,
Gregor Heinrich,
Martin Nieger,
Olaf Fuhr and
Stefan Bräse

Beilstein J. Org. Chem. 2019, 15, 1172–1180, doi:10.3762/bjoc.15.114

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Scheme 1: Summary of the most recent methods to obtain different BCPs from 1.

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Scheme 2: Screening reaction performed with different types of irradiation (see Figure 1).

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Figure 1: Optimization of the reaction conditions. The relative conversion was determined by GC–MS. The use o...

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Figure 2: Molecular structure of 6a (displacement parameters are drawn at 50% probability level), distance C1...

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Scheme 3: Proposed mechanism of the propellane insertion into disulfide bonds.

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Scheme 4: The insertion of 1 into dibenzyl disulfide (12) led to the formation of BCP 13 and traces of [2]sta...

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Scheme 5: Reaction of propellane (1) with the two disulfides 10a and 10d. When two different disulfides were ...

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Figure 3: NMR spectra of pure 6a (green) and 6d (red) and the obtained mixture with the new compound 15 (blue...

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Scheme 6: The reaction of 1 with the two disulfides 10a and 10e led to the known products 6a, 6e and to the u...

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Published 28 May 2019

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Selectivity control towards CO versus H2 for photo-driven CO2 reduction with a novel Co(II) catalyst

Scope of tetrazolo[1,5-a]quinoxalines in CuAAC reactions for the synthesis of triazoloquinoxalines, imidazoloquinoxalines, and rhenium complexes thereof

Insertion of [1.1.1]propellane into aromatic disulfides

Selectivity control towards CO versus H₂ for photo-driven CO₂ reduction with a novel Co(II) catalyst