Redox-Neutral Radical-Cation Reactions: Multiple Carbon–Carbon Bond Formations Enabled by Single-Electron Transfer.
Yohei Okada*
Electrochemistry
2020, 88, 497–506.
Electrochemical Amide Bond Formation from Benzaldehydes and Amines: Oxidation by Cathodic-Generated Hydrogen Peroxide.
Yuma Kurose, Yasushi Imada, Yohei Okada, Kazuhiro Chiba*
European Journal of Organic Chemistry
2020, 3844–3846.
Fluorocyclization of N-Propargyl Carboxamides by λ3-Iodane Catalysts with Coordinating Substituents.
Shunsuke Takahashi, Yuki Umakoshi, Kaii Nakayama, Yohei Okada, Viktor V. Zhdankin, Akira Yoshimura, Akio Saito*
Advanced Synthesis & Catalysis
2020, 362, 2997–3003.
Radical-Cation Vinylcyclopropane Rearrangements by TiO2 Photocatalysis.
Naoya Maeta, Hidehiro Kamiya, Yohei Okada*
The Journal of Organic Chemistry
2020, 85, 6551–6566. Highlighted as a Supplementary Cover.
Electrochemical Formation of Cinnamaldehyde by the Electrolyte System N,N-Diisopropylethylamine and 1,1,1,3,3,3-Hexafluoropropan-2-ol.
Yasushi Imada, Yohei Okada, Kazuhiro Chiba*
ChemElectroChem
2020, 7, 1619–1622.
Mechanistic Insights on Concentrated Lithium Salt/Nitroalkane Electrolyte Based on Analogy with Fluorinated Alcohols.
Naoki Shida, Yasushi Imada, Yohei Okada, Kazuhiro Chiba*
European Journal of Organic Chemistry
2020, 570–574.
2019
Improved Tag-Assisted Liquid-Phase Peptide Synthesis: Application to the Synthesis of Bradykinin Receptor-Antagonist Icatibant Acetate.
Yohei Okada, Rico Takasawa, Daisuke Kubo, Natsumi Iwanaga, Shuji Fujita, Kosuke Suzuki, Hideaki Suzuki, Hidehiro Kamiya, Kazuhiro Chiba*
Organic Process Research & Development
2019, 23, 2576–2581.
Probing Intramolecular Electron Transfer in Redox Tag Processes.
Naoya Maeta, Hidehiro Kamiya, Yohei Okada*
Organic Letters
2019, 21, 8519–8522. Highlighted as a Supplementary Cover.
Toward Stable Operation of Sewage Sludge Incineration Plants: The Use of Alumina Nanoparticles to Suppress Adhesion of Fly Ash.
Juguan Gao, Miki Matsushita, Genki Horiguchi, Ryosuke Fujii, Mayumi Tsukada, Yohei Okada, Hidehiro Kamiya*
Energy & Fuels
2019, 33, 9363–9366.
Redox Denaturation of Proteins: Electrochemical Treatment of Egg Plasma.
Daisuke Taniguchi, Akihiro Handa, Risa Kodama, Yohei Okada, Kazuhiro Chiba*
Electroanalysis
2019, 31, 2299–2302.
Radical Cation Diels-Alder Reactions of Non-Conjugated Alkenes by Electrocatalysis.
Atsushi Ozaki, Yusuke Yamaguchi, Yohei Okada, Kazuhiro Chiba*
Chinese Journal of Chemistry
2019, 37, 561–564.
A Novel Thermomorphic System for Electrocatalytic Diels-Alder Reactions.
Yasushi Imada, Naoki Shida, Yohei Okada, Kazuhiro Chiba*
Chinese Journal of Chemistry
2019, 37, 557–560.
Radical Cation Diels-Alder Reactions by TiO2 Photocatalysis.
Kaii Nakayama, Naoya Maeta, Genki Horiguchi, Hidehiro Kamiya, Yohei Okada*
Organic Letters
2019, 21, 2246–2250.
Substitution Pattern-Selective Olefin Cross Couplings.
Yohei Okada, Yusuke Yamaguchi, Kazuhiro Chiba*
ChemElectroChem
2019, 6, 4165–4168.
Interplay of arene radical cations with anions and fluorinated alcohols in hole catalysis.
Naoki Shida, Yasushi Imada, Shingo Nagahara, Yohei Okada, Kazuhiro Chiba*
Communications Chemistry
2019, 2, 24.
“Snapshots” of Intramolecular Electron Transfer in Redox Tag-Guided [2 + 2] Cycloadditions.
Yohei Okada*
The Journal of Organic Chemistry
2019, 84, 1882–1886. Highlighted as a Supplementary Cover.
Selective Functionalization of Styrenes with Oxygen Using Different Electrode Materials: Olefin Cleavage and Synthesis of Tetrahydrofuran Derivatives.
Yasushi Imada, Yohei Okada, Keiichi Noguchi, Kazuhiro Chiba*
Angewandte Chemie, International Edition
2019, 58, 125–129. Highlighted as a Back Cover.
2018
Toward Stable Operation of Coal Combustion Plants: The Use of Alumina Nanoparticles to Prevent Adhesion of Fly Ash.
Genki Horiguchi, Ryosuke Fujii, Yusuke Yamauchi, Harumi Okabe, Mayumi Tsukada, Yohei Okada, Hidehiro Kamiya*
Energy & Fuels
2018, 32, 13015–13020. Highlighted as a Supplementary Cover.
Photocatalytic Cycloadditions Enabled by Lithium Perchlorate/Nitromethane Electrolyte Solution.
Shingo Nagahara, Hiroki Wakamatsu, Yohei Okada, Kazuhiro Chiba*
European Journal of Organic Chemistry
2018, 6720–6723. Highlighted as a Front Cover.
Direct Ordering of Anchoring Events at the Surface of Iron Oxide Nanoparticles Enabled by A Stepwise Phase-Transfer Strategy.
Yohei Okada,* Hitomi Asama, Natsumi Koike, Shohei Yamashita, Naoya Maeta, Atsuko Uesaka, Hidehiro Kamiya
ChemistrySelect
2018, 3, 8458–8461.
Artificial bioconjugates with naturally occurring linkages: The use of phosphodiester.
Takao Shoji, Hiroki Fukutomi, Yohei Okada, Kazuhiro Chiba*
Beilstein Journal of Organic Chemistry
2018, 14, 1946–1955.
Direct Monitoring of Molecular Events at the Surface: One-Step Access to Flexibly Stable Colloidal Ag Nanoparticles.
Naoya Maeta, Hidehiro Kamiya, Yohei Okada*
Langmuir
2018, 34, 5495–5504.
TiO2 Photocatalysis in Aromatic “Redox Tag”-Guided Intermolecular Formal [2 + 2] Cycloadditions.
Yohei Okada,* Naoya Maeta, Kaii Nakayama, Hidehiro Kamiya
The Journal of Organic Chemistry
2018, 83, 4948–4962. Selected as a Featured Article.
Stepwise radical cation Diels-Alder reaction via multiple pathways.
Ryo Shimizu, Yohei Okada, Kazuhiro Chiba*
Beilstein Journal of Organic Chemistry
2018, 14, 704–708.
Investigating radical cation chain processes in the electrocatalytic Diels-Alder reaction.
Yasushi Imada, Yohei Okada, Kazuhiro Chiba*
Beilstein Journal of Organic Chemistry
2018, 14, 642–647.
Redox-Tag Processes: Intramolecular Electron Transfer and Its Broad Relationship to Redox Reactions in General.
Yohei Okada, Kazuhiro Chiba*
Chemical Reviews
2018, 118, 4592–4630.
A Pot-Economical Liquid Phase PNA Synthesis Enabled by a Soluble Tag-Assisted Method.
Keisuke Ogami, Yohei Okada, Kazuhiro Chiba*
Chemistry Letters
2018, 47, 138–140.
Understanding the Colloidal Stability of Nanoparticle-Ligand Complexes: Design, Synthesis, and Structure-Function Relationship Studies of Amphiphilic Small-Molecule Ligands.
Yohei Okada,* Kodai Ishikawa, Naoya Maeta, Hidehiro Kamiya
Chemistry A European Journal
2018, 24, 1853–1858. Highlighted as a Cover Feature.
2017
Photo-Triggered Fluorometric Hydrophobic Benzyl Alcohol for Soluble Tag-Assisted Liquid-Phase Peptide Synthesis.
Hiroki Wakamatsu, Yohei Okada, Masae Sugai, Syed R. Hussaini, Kazuhiro Chiba*
Asian Journal of Organic Chemistry
2017, 6, 1584–1588. Highlighted as a Front Cover.
Hydrophobic Magnetic Nanoparticle-Assisted One-Pot Liquid Phase Peptide Synthesis.
Yohei Okada,* Hitomi Asama, Hiroki Wakamatsu, Kazuhiro Chiba, Hidehiro Kamiya
European Journal of Organic Chemistry
2017, 5961–5965. Selected as a Very Important Paper and Highlighted as a Front Cover.
Bidirectional Access to Radical Cation Diels-Alder Reactions by Electrocatalysis.
Atsushi Ozaki, Yusuke Yamaguchi, Yohei Okada, Kazuhiro Chiba*
ChemElectroChem
2017, 4, 1852–1855.
Electron-Transfer-Induced Molecular Reactions: Electrode Processes in Organic Synthesis.
Kazuhiro Chiba,* Yohei Okada
Current Opinion in Electrochemistry
2017, 2, 53–59.
Entropic electrolytes for anodic cycloadditions of unactivated alkene nucleophiles.
Yasushi Imada, Yusuke Yamaguchi, Naoki Shida, Yohei Okada, Kazuhiro Chiba*
Chemical Communications
2017, 53, 3960–3963.
2016
Hydrogen-Bonding-Induced Fluorescence: Water-Soluble and Polarity-Independent Solvatochromic Fluorophores.
Yohei Okada, Masae Sugai, Kazuhiro Chiba*
The Journal of Organic Chemistry
2016, 81, 10922–10929.
Aromatic “Redox Tag”-assisted Diels-Alder reactions by electrocatalysis.
Yohei Okada, Yusuke Yamaguchi, Atsushi Ozaki, Kazuhiro Chiba*
Chemical Science
2016, 7, 6387–6393.
Effect of surface modification of silica particles on interaction forces and dispersibility in suspension.
Takeshi Mori, Yohei Okada, Hidehiro Kamiya*
Advanced Powder Technology
2016, 27, 830–838.
2015
Acid-Triggered Colorimetric Hydrophobic Benzyl Alcohols for Soluble Tag-Assisted Liquid-Phase Synthesis.
Yohei Okada, Hiroki Wakamatsu, Masae Sugai, Esko I. Kauppinen, Kazuhiro Chiba*
Organic Letters
2015, 17, 4264–4267.
Hydrophobic benzyl amines as supports for liquid-phase C-terminal amidated peptide synthesis: application to the preparation of ABT-510.
Emiko Matsumoto, Yuko Fujita, Yohei Okada, Esko I. Kauppinen, Hidehiro Kamiya, Kazuhiro Chiba*
Journal of Peptide Science
2015, 21, 691–695.
2014
Total Synthesis of Elastin Peptide Using High Pressure-Liquid Phase Synthesis Assisted by a Soluble Tag Strategy.
Yohei Okada, Shoichi Hosoya, Hidenobu Suzuki, Kazuhiro Chiba*
Organic Letters
2014, 16, 6448–6451.
Anodic Substitution Reaction of Proline Derivatives Using the 2,4,6-Trimethoxyphenyl Leaving Group.
Takao Shoji, Shokaku Kim, Keisuke Yamamoto, Tomomitsu Kawai, Yohei Okada, Kazuhiro Chiba*
Organic Letters
2014, 16, 6404–6407.
A disulfide bond-replacement strategy enables the efficient design of artificial therapeutic peptides.
Kazuhiro Aoki, Miki Maeda, Takashi Nakae, Yohei Okada, Keiichi Ohya, Kazuhiro Chiba*
Tetrahedron
2014, 70, 7774–7779.
Phase-transfer-mediated electrochemical reaction: anodic disulfide bond formation under biphasic condition.
Masahito Takahashi, Yohei Okada, Yoshikazu Kitano, Kazuhiro Chiba*
Tetrahedron Letters
2014, 55, 3622–3624.
Evaluation of the Reduced Allergenicity of Deamidated Gliadin in a Mouse Model of Wheat-Gliadin Allergy Using an Antibody Prepared by a Peptide Containing Three Epitopes.
Ryosuke Abe, Shiori Shimizu, Karin Yasuda, Masae Sugai, Yohei Okada, Kazuhiro Chiba, Makoto Akao, Hitoshi Kumagai, Hitomi Kumagai*
Journal of Agricultural and Food Chemistry
2014, 62, 2845–2852.
Toward Continuous LC-MS Analysis: Surface Modification of Magnetic Microparticles with TiO2 for Phosphate Adsorption.
Issei Akutagawa, Yoshitake Akiyama, Yutaka Takahashi, Motoyuki Iijima, Yohei Okada, Hidehiro Kamiya, Kazuhiro Chiba*
Bioscience, Biotechnology, and Biochemistry
2014, 78, 748–754.
Short Step Anodic Access to Emissive RNA Homonucleosides.
Yohei Okada, Kouhei Shimada, Yoshikazu Kitano, Kazuhiro Chiba*
European Journal of Organic Chemistry
2014, 1371–1375. Highlighted as a Cover Picture.
2013
Soluble Tag-Assisted Peptide Head-to-Tail Cyclization: Total Synthesis of Mahafacyclin B.
Yuko Fujita, Shuji Fujita, Yohei Okada, Kazuhiro Chiba*
Organic Letters
2013, 15, 1155–1157.
Understanding the Reactivity of Enol Ether Radical Cations: Investigation in Anodic Four-Membered Carbon Ring Formation.
Yusuke Yamaguchi, Yohei Okada, Kazuhiro Chiba*
The Journal of Organic Chemistry
2013, 78, 2626–2638.
Investigation of the Pathway for Intramolecular Electron Transfer in Anodic [2 + 2] Cycloaddition Reactions.
Kazuya Kamimura, Yohei Okada, Kazuhiro Chiba*
Electrochemistry
2013, 81, 377–379.
Total synthesis of a-conotoxin MII using a soluble-tag-assisted method.
Shingo Kitada, Shuji Fujita, Yohei Okada, Shokaku Kim, Kazuhiro Chiba*
Tetrahedron
2013, 69, 2555–2559.
Cyclic Voltammetric Studies on Electrocatalytic Intermolecular [2 + 2] Cycloaddition Reactions in Lithium Perchlorate/Nitromethane Electrolyte Solution.
Yusuke Yamaguchi, Yohei Okada, Kazuhiro Chiba*
Electrochemistry
2013, 81, 331–333.
Tag-Assisted Liquid-Phase Peptide Synthesis using Hydrophobic Benzyl Alcohols as Supports.
Yohei Okada, Hideaki Suzuki, Takashi Nakae, Shuji Fujita, Hitoshi Abe, Kazuo Nagano, Toshihide Yamada, Nobuyoshi Ebata, Shokaku Kim, Kazuhiro Chiba*
The Journal of Organic Chemistry
2013, 78, 320–327.
2012
Soluble-Support-Assisted Electrochemical Reactions: Application to Anodic Disulfide Bond Formation.
Shingo Kitada, Masahito Takahashi, Yusuke Yamaguchi, Yohei Okada, Kazuhiro Chiba*
Organic Letters
2012, 14, 5960–5963.
Cycloalkane-based thermomorphic systems for organic electrochemistry: an application to Kolbe-coupling.
Yohei Okada, Kazuya Kamimura, Kazuhiro Chiba*
Tetrahedron
2012, 68, 5857–5862.
Efficient Intermolecular Carbon–Carbon Bond-Formation Reactions Assisted by Surface-Condensed Electrodes.
Yohei Okada, Yusuke Yamaguchi, Kazuhiro Chiba*
European Journal of Organic Chemistry
2012, 243–246.
2011
Heterogeneous continuous flow synthetic system using cyclohexane-based multiphase electrolyte solutions.
Yohei Okada, Tomohiko Yoshioka, Mikio Koike, Kazuhiro Chiba*
Tetrahedron Letters
2011, 52, 4690–4693.
Hydrophobic tag-assisted liquid-phase synthesis of a growth hormone-inhibiting peptide somatostatin.
Shingo Kitada, Shuji Fujita, Yohei Okada, Shokaku Kim, Kazuhiro Chiba*
Bioorganic Medicinal Chemistry Letters
2011, 21, 4476–4479.
Electron-Transfer-Induced Intermolecular [2 + 2] Cycloaddition Reactions Based on the Aromatic “Redox Tag” Strategy.
Yohei Okada, Asaki Nishimoto, Ryoichi Akaba, Kazuhiro Chiba*
The Journal of Organic Chemistry
2011, 76, 3470–3476.
Rate acceleration of Diels-Alder reactions utilizing a fluorous micellar system in water.
Kohsuke Nishimoto, Yohei Okada, Shokaku Kim, Kazuhiro Chiba*
Electrochimica Acta
2011, 56, 10626–10631.
Electron transfer-induced four-membered cyclic intermediate formation: Olefin cross-coupling vs. olefin cross-metathesis.
Yohei Okada, Kazuhiro Chiba*
Electrochimica Acta
2011, 56, 1037–1042.
2010
A practical solution-phase synthesis of an antagonistic peptide of TNF- based on hydrophobic tag strategy.
Gegen Tana, Shingo Kitada, Shuji Fujita, Yohei Okada, Shokaku Kim, Kazuhiro Chiba*
Chemical Communications
2010, 46, 8219–8221.
Continuous electrochemical synthetic system using a multiphase electrolyte solution.
Yohei Okada, Kazuhiro Chiba*
Electrochimica Acta
2010, 55, 4112–4119.
2009
EC-backward-E electrochemistry supported by an alkoxyphenyl group.
Yohei Okada, Ryoichi Akaba, Kazuhiro Chiba*
Tetrahedron Letters
2009, 50, 5413–5416.
Electrocatalytic Formal [2+2] Cycloaddition Reactions between Anodically Activated Aliphatic Enol Ethers and Unactivated Olefins Possessing an Alkoxyphenyl Group.
Yohei Okada, Ryoichi Akaba, Kazuhiro Chiba*
Organic Letters
2009, 11, 1033–1035.