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2 article(s) from Tahara, Keishiro

Small anion-assisted electrochemical potential splitting in a new series of bistriarylamine derivatives: organic mixed valency across a urea bridge and zwitterionization

Keishiro Tahara,
Tetsufumi Nakakita,
Alyona A. Starikova,
Takashi Ikeda,
Masaaki Abe and
Jun-ichi Kikuchi

Beilstein J. Org. Chem. 2019, 15, 2277–2286, doi:10.3762/bjoc.15.220

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Figure 1: Structures of target compounds 1 and reference compound Ph1b.

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Figure 2: Cyclic voltammograms (left) and differential pulse voltammograms (right) of (top) 1a, (middle) Ph1b,...

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Figure 3: Key frontier orbitals (isosurface values 0.02 au) (top), DFT-optimized structures with Mullliken ch...

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Figure 4: UV–vis-NIR spectral changes of CH₂Cl₂/n-Bu₄NPF₆ (0.10 M) solutions containing (a) 1b (4.5 × 10⁻⁴ M)...

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Figure 5: Vis-NIR spectra of 1b⁺ (green line) obtained by bulk electrolysis, with Gaussian deconvolutions (bl...

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Full Research Paper

Published 24 Sep 2019

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Learning from B₁₂ enzymes: biomimetic and bioinspired catalysts for eco-friendly organic synthesis

Keishiro Tahara,
Ling Pan,
Toshikazu Ono and
Yoshio Hisaeda

Beilstein J. Org. Chem. 2018, 14, 2553–2567, doi:10.3762/bjoc.14.232

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Figure 1: (a) Structure and (b) reactivity of B₁₂.

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Figure 2: (a) Schematic representation of B₁₂ enzyme-involving systems. (b) Construction of biomimetic and bi...

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Scheme 1: (a) Carbon-skeleton rearrangement mediated by a coenzyme B₁₂-depenedent enzyme. (b) Electrochemical...

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Scheme 2: Electrochemical carbon-skeleton arrangements mediated by B₁₂ model complexes.

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Figure 3: Key electrochemical reactivity of 1 and 2 in methylated forms.

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Scheme 3: Carbon-skeleton arrangements mediated by B₁₂-vesicle artificial enzymes.

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Scheme 4: Carbon-skeleton arrangements mediated by B₁₂-HSA artificial enzymes.

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Scheme 5: Photochemical carbon-skeleton arrangements mediated by B₁₂-Ru@MOF.

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Scheme 6: (a) Methyl transfer reaction mediated by B₁₂-dependent methionine synthase. (b) Methyl transfer rea...

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Scheme 7: Methyl transfer reaction for the detoxification of inorganic arsenics.

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Scheme 8: (a) Dechlorination of 1,1,2,2-tetrarchloroethene mediated by a reductive dehalogenase. (b) Electroc...

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Scheme 9: Visible-light-driven dechlorination of DDT using 1 in the presence of photosensitizers.

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Scheme 10: 1,2-Migration of a phenyl group mediated by the visible-light-driven catalytic system composed of 1...

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Scheme 11: Ring-expansion reactions mediated by the B₁₂-TiO₂ hybrid catalyst with UV-light irradiation.

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Scheme 12: Trifluoromethylation and perfluoroalkylation of aromatic compounds achieved through electrolysis wi...

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Published 02 Oct 2018

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Small anion-assisted electrochemical potential splitting in a new series of bistriarylamine derivatives: organic mixed valency across a urea bridge and zwitterionization

Learning from B12 enzymes: biomimetic and bioinspired catalysts for eco-friendly organic synthesis

Learning from B₁₂ enzymes: biomimetic and bioinspired catalysts for eco-friendly organic synthesis