4 article(s) from Okada, Yohei
- Letter
- Published 25 Aug 2022
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Figure 1: Plausible mechanism of the radical cation Diels–Alder reaction (EDG: electron-donating group).
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Figure 2: Landscape of the radical cation Diels–Alder reaction.
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Scheme 1: Radical cation Diels–Alder reaction of β-methylstyrene.
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Scheme 2: Radical cation Diels–Alder reaction of β-methylanethole (1). Recovered starting material is reporte...
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Figure 3: Formal expression of radical cations.
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Scheme 3: Radical cation Diels–Alder reactions of the arylidene cycloalkanes (4–7). Recovered starting materi...
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Scheme 4: Scope of the radical cation Diels–Alder reaction of arylidene cycloalkanes (recovered starting mate...
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- Full Research Paper
- Published 27 Jul 2018
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Figure 1: Schematic illustration of possible support-assisted methods.
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Figure 2: Expected reactivity of 5’- and 3’-terminus for the activation.
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Scheme 1: Competition experiment between alcohol and carboxylic acid. Reagents and conditions: (i) 4-phenylbu...
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Scheme 2: Conjugation between the 5’-activated supported trinucleotide 2 and the tripeptide 3. Reagents and c...
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Figure 3: HPLC spectra of the crude protected bioconjugate 4 and the crude deprotected bioconjugate 5.
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Scheme 3: 5’-Phosphitylation of supported decanucleotide 13. Reagents and conditions: 2-cyanoethyl-N,N,N',N'-...
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Scheme 4: Conjugation between 5’-activated supported decanucleotide 14 and supported pentapeptide 7. Reagents...
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Figure 4: HPLC spectra of the crude protected bioconjugate 15 and the deprotected bioconjugate 16.
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- Letter
- Published 27 Mar 2018
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Scheme 1: Radical cation Diels–Alder reaction of trans-anethole [17].
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Scheme 2: Radical cation Diels–Alder reactions of aryl vinyl ether and sulfides [17,25].
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Scheme 3: Radical cation Diels–Alder reaction of aryl vinyl ether (1). Conditions: 1.0 M LiClO4/CH3NO2, carbo...
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Scheme 4: Oxidative SET-triggered reaction of aryl vinyl ether 1c. Conditions: 1.0 M LiClO4/CH3NO2, carbon fe...
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Figure 1: GC–MS Monitoring of the oxidative SET-triggered reaction of aryl vinyl ether 1c.
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Scheme 5: Oxidative SET-triggered rearrangement of vinyl cyclobutane 4. Conditions: 1.0 M LiClO4/CH3NO2, carb...
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Scheme 6: Unsuccessful rearrangement of cyclobutanes. Conditions: 1.0 M LiClO4/CH3NO2, carbon felt electrodes...
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Scheme 7: Proposed mechanism for the radical cation Diels–Alder reaction of aryl vinyl ether 1.
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- Letter
- Published 16 Mar 2018
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Scheme 1: SET-triggered Diels–Alder reaction of trans-anethole (1) and isoprene (2).
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Figure 1: Plausible mechanism for the electrocatalytic Diels–Alder reaction. Adapted from [22].
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Scheme 2: Undesired dimerization of trans-anethole (1).
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Figure 2: GC–MS monitoring of the electrocatalytic Diels–Alder reaction (1: 300 mM; 2: 3000 mM).
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Figure 3: GC–MS monitoring of the electrocatalytic Diels–Alder reaction (1: 1 mM; 2: 2000 mM).
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Figure 4: GC–MS monitoring of the electrocatalytic Diels–Alder reaction (1: 2 M; 2: 6 M). Blue dots show the ...
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