Search Results - "Dohi, Toshifumi"

Pioneering Metal-Free Oxidative Coupling Strategy of Aromatic Compounds Using Hypervalent Iodine Reagents by Kita, Yasuyuki, Dohi, Toshifumi

“…We started our hypervalent iodine research about 30 years ago in the mid‐1980s. We soon successfully developed the single‐electron‐transfer oxidation ability…”
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Organo-Iodine(III)-Catalyzed Oxidative Phenol-Arene and Phenol-Phenol Cross-Coupling Reaction by Morimoto, Koji, Sakamoto, Kazuma, Ohshika, Takao, Dohi, Toshifumi, Kita, Yasuyuki

“…The direct oxidative coupling reaction has been an attractive tool for environmentally benign chemistry. Reported herein is that the hypervalent iodine…”
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Halogen-Induced Controllable Cyclizations as Diverse Heterocycle Synthetic Strategy by China, Hideyasu, Kumar, Ravi, Kikushima, Kotaro, Dohi, Toshifumi

“…In organic synthesis, due to their high electrophilicity and leaving group properties, halogens play pivotal roles in the activation and structural derivations…”
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Hypervalent Iodine-Induced Oxidative Couplings (New Metal-Free Coupling Advances and Their Applications in Natural Product Syntheses) by Dohi, Toshifumi, Kita, Yasuyuki

“…Recently, hypervalent iodine reagents have been extensively used in organic synthesis. A variety of reactions available for natural product syntheses have been…”
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Asymmetric Direct/Stepwise Dearomatization Reactions Involving Hypervalent Iodine Reagents by Kumar, Ravi, Singh, Fateh V., Takenaga, Naoko, Dohi, Toshifumi

“…A remarkable growth in hypervalent iodine‐mediated oxidative transformations as stoichiometric reagents as well as catalysts has been well‐documented due to…”
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Asymmetric Dearomatizing Spirolactonization of Naphthols Catalyzed by Spirobiindane-Based Chiral Hypervalent Iodine Species by Dohi, Toshifumi, Takenaga, Naoko, Nakae, Tomofumi, Toyoda, Yosuke, Yamasaki, Mikio, Shiro, Motoo, Fujioka, Hiromichi, Maruyama, Akinobu, Kita, Yasuyuki

“…This report details the development of a spirobiindane-based chiral hypervalent iodine reagent, especially focusing on its structural elucidation for effective…”
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Chiral Atropisomeric 8,8′-Diiodobinaphthalene for Asymmetric Dearomatizing Spirolactonizations in Hypervalent Iodine Oxidations by Dohi, Toshifumi, Sasa, Hirotaka, Miyazaki, Keitaro, Fujitake, Mihoyo, Takenaga, Naoko, Kita, Yasuyuki

“…A new type of binaphthyl-based chiral iodide functionalized at positions 8 and 8′ of the naphthalene rings has been found as a promising structural motif for…”
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Nucleophilic Aromatic Substitution of Polyfluoroarene to Access Highly Functionalized 10-Phenylphenothiazine Derivatives by Kikushima, Kotaro, Koyama, Haruka, Kodama, Kazuki, Dohi, Toshifumi

“…Nucleophilic aromatic substitution (S Ar) reactions can provide metal-free access to synthesize monosubstituted aromatic compounds. We developed efficient S Ar…”
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Metal-Free Oxidative Cross-Coupling of Unfunctionalized Aromatic Compounds by Kita, Yasuyuki, Morimoto, Koji, Ito, Motoki, Ogawa, Chieko, Goto, Akihiro, Dohi, Toshifumi

“…A new strategy for mixed biaryl synthesis has been developed using the hypervalent iodine(III) reagents. The unique reactivities of the σ-heteroaryl…”
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Efficient N-arylation of azole compounds utilizing selective aryl-transfer TMP-iodonium(III) reagents by Koseki, Daichi, Aoto, Erika, Shoji, Toshitaka, Watanabe, Kazuma, In, Yasuko, Kita, Yasuyuki, Dohi, Toshifumi

“…[Display omitted] •Efficient aryl amination of azole compounds.•Coupling reaction employing reactive pseudo-halide.•TMP-iodonium(III) for reactive/selective…”
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μ-Oxo-Hypervalent-Iodine-Catalyzed Oxidative C–H Amination for Synthesis of Benzolactam Derivatives by Sasa, Hirotaka, Mori, Koyo, Kikushima, Kotaro, Kita, Yasuyuki, Dohi, Toshifumi

“…Benzolactams have unique biological activity and high utility in the synthesis of valuable compounds with direct applicability to oxindole alkaloids and…”
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Synthesis of Uracil-Iodonium(III) Salts for Practical Utilization as Nucleobase Synthetic Modules by Takenaga, Naoko, Hayashi, Takumi, Ueda, Shohei, Satake, Hiroyuki, Yamada, Yoichi, Kodama, Tetsuya, Dohi, And Toshifumi

“…Iodonium(III) salts bearing uracil moieties have recently appeared in the literature, but their structural scope and utilization are limited because of their…”
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Unusual ipso Substitution of Diaryliodonium Bromides Initiated by a Single-Electron-Transfer Oxidizing Process by Dohi, Toshifumi, Ito, Motoki, Yamaoka, Nobutaka, Morimoto, Koji, Fujioka, Hiromichi, Kita, Yasuyuki

“…Aromatic substitution: The treatment of diaryliodonium bromides 1 with aromatic nucleophiles 2, afforded a variety of heteroaryl‐containing biaryls 3 in good…”
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Metal-Free Oxidative para Cross-Coupling of Phenols by Morimoto, Koji, Sakamoto, Kazuma, Ohnishi, Yusuke, Miyamoto, Takeshi, Ito, Motoki, Dohi, Toshifumi, Kita, Yasuyuki

“…CC coupling: Direct oxidative coupling reactions are an attractive tool for environmentally benign chemistry. The oxidative biaryl coupling reaction of…”
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Iodine(V)-Based Oxidants in Oxidation Reactions by Shetgaonkar, Samata E, Jothish, Subhiksha, Dohi, Toshifumi, Singh, Fateh V

“…The chemistry of hypervalent iodine reagents has now become quite valuable due to the reactivity of these compounds under mild reaction conditions and their…”
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Recycling and Catalytic Approaches for the Development of a Rare-Metal-Free Synthetic Method Using Hypervalent Iodine Reagent by Dohi, Toshifumi

“…Oxidation reactions consist of a number of important transformations in organic synthesis. However, in spite of their utility in both laboratory- and…”
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Iodoarene-catalyzed fluorination and aminofluorination by an Ar-I/HF·pyridine/mCPBA system by Suzuki, Satoru, Kamo, Tomohiro, Fukushi, Kazunobu, Hiramatsu, Takaaki, Tokunaga, Etsuko, Dohi, Toshifumi, Kita, Yasuyuki, Shibata, Norio

“…We have developed the iodoarene-catalyzed nucleophilic fluorination of β-dicarbonyl compounds and intramolecular aminofluorination of ω-amino-alkenes using the…”
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Palladium-Catalyzed Organic Reactions Involving Hypervalent Iodine Reagents by Shetgaonkar, Samata E., Mamgain, Ritu, Kikushima, Kotaro, Dohi, Toshifumi, Singh, Fateh V.

“…The chemistry of polyvalent iodine compounds has piqued the interest of researchers due to their role as important and flexible reagents in synthetic organic…”
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Oxidative Cross-Coupling of Arenes Induced by Single-Electron Transfer Leading to Biaryls by Use of Organoiodine(III) Oxidants by Dohi, Toshifumi, Ito, Motoki, Morimoto, Koji, Iwata, Minako, Kita, Yasuyuki

“…Cross‐coupling goes green: The direct oxidative cross‐coupling reaction of naphthalenes and other electron‐rich arenes with mesitylenes has been achieved in…”
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Practical Synthesis of 2-Iodosobenzoic Acid (IBA) without Contamination by Hazardous 2-Iodoxybenzoic Acid (IBX) under Mild Conditions by China, Hideyasu, Kageyama, Nami, Yatabe, Hotaka, Takenaga, Naoko, Dohi, Toshifumi

“…We report a convenient and practical method for the preparation of nonexplosive cyclic hypervalent iodine(III) oxidants as efficient organocatalysts and…”
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