- Electrochemical Generation of Hypervalent Bromine(III) Compounds
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In sharp contrast to hypervalent iodine(III) compounds, the isoelectronic bromine(III) counterparts have been little studied to date. This knowledge gap is mainly attributed to the difficult-to-control reactivity of λ3-bromanes as well as to their challenging preparation from the highly toxic and corrosive BrF3 precursor. In this context, we present a straightforward and scalable approach to chelation-stabilized λ3-bromanes by anodic oxidation of parent aryl bromides possessing two coordinating hexafluoro-2-hydroxypropanyl substituents. A series of para-substituted λ3-bromanes with remarkably high redox potentials spanning a range from 1.86 V to 2.60 V vs. Ag/AgNO3 was synthesized by the electrochemical method. We demonstrate that the intrinsic reactivity of the bench-stable bromine(III) species can be unlocked by addition of a Lewis or a Br?nsted acid. The synthetic utility of the λ3-bromane activation is exemplified by oxidative C?C, C?N, and C?O bond forming reactions.
- Francke, Robert,Mohebbati, Nayereh,Sokolovs, Igors,Suna, Edgars
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supporting information
p. 15832 - 15837
(2021/06/14)
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- The substituent effect of bridged triarylamine helicenes on light-emitting and charge transfer properties
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Methoxy-(7a), bromo-(7b), CF3-(7c) and hydroxyl-(7d) substituted bridged triarylamine helicenes were synthesized under mild conditions in 6598% yield. Their luminescence red-shifted with π-donating substituents and blue-shifted with the electro
- Adachi, Yohei,Nakamoto, Masaaki,Shang, Rong,Yamamoto, Yohsuke,Yan, Chenting
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supporting information
p. 457 - 460
(2020/05/19)
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- Heterocyclic compounds and organic light-emitting diode including the same
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The present invention relates to a heterocyclic compound represented by [Chemical Formula 1] below and an organic light-emitting diode including the same. The organic light-emitting diode according to the present invention is excellent in view of luminous characteristics such as driving voltage, lifespan, and efficiency. [Chemical Formula 1].
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Paragraph 0294; 0301-0306
(2020/12/11)
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- Bridged triarylamines: A new class of heterohelicenes
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A series of bridged triarylamines, which constitute a new class of heterohelicenes, have been synthesized using a simple three-step procedure. These compounds are shown to be highly luminescent chromophores and are capable of being oxidized. The solid-sta
- Field, Jason E.,Hill, Thomas J.,Venkataraman
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p. 6071 - 6078
(2007/10/03)
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- Formation and rearrangement of dithioxo- and diselenoxophosphoranes carrying bulky 4-t-butyl-2,6-bis(methoxyalkyl)phenyl groups
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[4-t-Butyl-2,6-bis(1-methoxy-1-methylethyl)phenyl]phosphine, [4-t-butyl- 2,6-bis(2-methoxy-1,1-dimethylethyl)phenyl]phosphine, and [4-t-butyl-2,6- bis(3-methoxy-1,1-dimethylpropyl)phenyl]phosphine were prepared and allowed to react with sulfur or selenium, to give heterocyclic compounds containing phosphorus-oxygen bond, via rearrangement of the methyl moiety of the methoxy group.
- Yoshifuji, Masaaki,Nakazawa, Masahiko,Sato, Takeshi,Toyota, Kozo
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- Solution and solid state studies of some new silicon and germanium compounds stabilized by tridentate ligands
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The preparation and studies of novel heterocyclic compounds, containing silicon or germanium, is described. All of them incorporate the 2,6-bis(dialkylaminomethyl)-4-(1,1-dimethylethyl)phenyl tridentate ligand (Structures 1-2, Scheme 1) as a main substruc
- Benin, Vladimir A.,Martin, James C.,Willcott, M. Robert
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p. 10133 - 10154
(2007/10/03)
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- Synthesis and NMR Characterization of Bis-Strapped Six-coordinate Fe(II) Cytochrome-C Model
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The new hexadentate bis-strapped porphyrin 6 has been synthesized with two different ansa, bringing in an intramolecular way, a nitrogen base and a thioether sixth ligand both necessary to mimic the natural cytochrome-C protein. 1H NMR spectroscopy indicates clearly the six coordination of the iron atom.Key Words: cytochrome-C/ porphyrin/ modelisation/ six-coordinate Fe(II)
- Boitrel, Bernard,Lecas-Nawrocka, Alexandra,Rose, Eric
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p. 227 - 230
(2007/10/02)
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