Search Results - "Atsushi Ohtaka"

Recent Progress of Metal Nanoparticle Catalysts for C–C Bond Forming Reactions by Atsushi Ohtaka

“…Over the past few decades, the use of transition metal nanoparticles (NPs) in catalysis has attracted much attention and their use in C–C bond forming…”
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Recyclable Polymer-Supported Nanometal Catalysts in Water by Ohtaka, Atsushi

“…Two types of polymer‐supported nanometal catalysts with high catalytic activity and recyclability in water have been developed. One catalyst was composed of…”
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Regiospecificity of Immobilized Candida antarctica Lipase B (CAL-B) towards 2,3-Diacyl-1-O-alkyl Glyceryl Ether in Ethanol by Sato, Hirofumi, Hashimoto, Naoki, Watanabe, Yomi, Ohtaka, Atsushi

“…Highly pure 2,3-dioleoyl-1-O-alkyl glyceryl ether (DOGE), whose 1-position is a lipase-tolerant ether bond, was chemically synthesized and its detailed…”
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Oxidation of Primary Amines to Nitriles Catalyzed by Polystyrene-stabilized Ru Nanoparticles in Water by Kawase, Misa, Suzuki, Ryugo, Kobayashi, Kaito, Shinagawa, Tsutomu, Tazawa, Aya, Uozumi, Yasuhiro, Matsumura, Yoshimasa, Shimomura, Osamu, Ohtaka, Atsushi

“…Primary amines were successfully oxidized to nitriles in water under mild reaction conditions in the presence of polystyrene (PS)-stabilized Ru(III)…”
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Expression of Reaction Selectivity and the Substituent Effect in Ullmann, Suzuki, Hiyama, and Allylic Arylation Reactions Caused by Reducing Catalyst Loading by Misa Kawase, Tomohiro Shibata, Shouhei Masuu, Masaki Yamaguchi, Yoshimasa Matsumura, Osamu Shimomura, Atsushi Ohtaka

“…The control of stereo-, regio-, and chemo-selectivity in transition-metal-catalyzed coupling reactions is a key topic in organic synthesis. Several methods for…”
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Detailed Mechanism for Hiyama Coupling Reaction in Water Catalyzed by Linear Polystyrene-Stabilized PdO Nanoparticles by Sakon, Akira, Ii, Ryoma, Hamasaka, Go, Uozumi, Yasuhiro, Shinagawa, Tsutomu, Shimomura, Osamu, Nomura, Ryôki, Ohtaka, Atsushi

“…The catalytic cycle of the Hiyama coupling reaction in water catalyzed by linear polystyrene-stabilized PdO nanoparticles (PS-PdONPs) was investigated. The…”
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Catalytic specificity of linear polystyrene-stabilized Pd nanoparticles during Ullmann coupling reaction in water and the associated mechanism by Ohtaka, Atsushi, Sakon, Akira, Yasui, Asuka, Kawaguchi, Taira, Hamasaka, Go, Uozumi, Yasuhiro, Shinagawa, Tsutomu, Shimomura, Osamu, Nomura, Ryôki

“…In the present work, heterogeneous Pd nanoparticle catalysts supported on linear polystyrene (PS-PdNPs) were used to promote Ullmann coupling reactions in…”
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DBU-Intercalated α-Zirconium Phosphates as Latent Thermal Catalysts in the Reaction of Hexamethylene Diisocyanate and Phenol by Osamu Shimomura, Hideki Kusu, Atsushi Ohtaka, Ryôki Nomura

“…The catalytic activity of 1,8-diazabicyclo [5,4,0]undec-7-ene-intercalated α-zirconium phosphates (α-ZrP·DBU) as thermal latent catalysts in the reaction of…”
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Linear Polystyrene-stabilized Pt Nanoparticles Catalyzed Indole Synthesis in Water via Aerobic Alcohol Oxidation by Ohtaka, Atsushi, Kozono, Mao, Takahashi, Kazuhiro, Hamasaka, Go, Uozumi, Yasuhiro, Shinagawa, Tsutomu, Shimomura, Osamu, Nomura, Ryôki

“…The one-pot synthesis of indole in water by aerobic alcohol oxidation and subsequent cyclization was achieved using linear polystyrene-stabilized Pt…”
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Palladium and Bimetallic Palladium-Nickel Nanoparticles Supported on Multiwalled Carbon Nanotubes: Application to CarbonCarbon Bond-Forming Reactions in Water by Ohtaka, Atsushi, Sansano, José M., Nájera, Carmen, Miguel-García, Izaskun, Berenguer-Murcia, Ángel, Cazorla-Amorós, Diego

“…Palladium and bimetallic Pd–Ni nanoparticles (NPs) protected by polyvinylpyrrolidone were prepared by the reduction‐by‐solvent method and deposited on…”
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Zeolitic Imidazolate Frameworks as Latent Thermal Initiators in the Curing of Epoxy Resin by Shimomura, Osamu, Furuya, Hiroshi, Fukumoto, Daiki, Ohtaka, Atsushi, Nomura, Ryôki

“…The curing of a mixture of glycidyl phenyl ether (GPE) and hexahydro-4-methylphthalic anhydride (MHHPA) with zeolitic imidazolate frameworks (ZIFs)ZIF-7,…”
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Polyion complex stabilized palladium nanoparticles for Suzuki and Heck reaction in water by Ohtaka, Atsushi, Tamaki, Yuji, Igawa, Yuta, Egami, Koji, Shimomura, Osamu, Nomura, Ryôki

“…Palladium nanoparticles stabilized by a polyion complex composed of poly{4-chloromethylstyrene- co-(4-vinylbenzyl) tributylammonium chloride} and poly(acrylic…”
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Linear polystyrene-stabilized PdO nanoparticle-catalyzed Mizoroki-Heck reactions in water by Ohtaka, Atsushi, Yamaguchi, Tomohiro, Teratani, Takuto, Shimomura, Osamu, Nomura, Ryôki

“…Linear polystyrene-stabilized PdO nanoparticles (PS-PdONPs) were prepared by thermal decomposition of Pd(OAc)(2) in the presence of polystyrene. X-ray…”
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Release Behavior of Benzimidazole-Intercalated α-Zirconium Phosphate as a Latent Thermal Initiator in the Reaction of Epoxy Resin by Osamu Shimomura, Suguru Sasaki, Kaori Kume, Shintaro Kawano, Motohiro Shizuma, Atsushi Ohtaka, Ryôki Nomura

“…The intercalation compound of benzimidazole with α-zirconium phosphate (α-ZrP) was evaluated as a latent thermal initiator in the reaction of glycidyl phenyl…”
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A Recyclable "Boomerang" Linear Polystyrene-Stabilized Pd Nanoparticles for the Suzuki Coupling Reaction of Aryl Chlorides in Water by Ohtaka, Atsushi, Sakaguchi, Erina, Yamaguchi, Tomohiro, Hamasaka, Go, Uozumi, Yasuhiro, Shimomura, Osamu, Nomura, Ryôki

“…Boomerang! It keeps coming back! The reversible transfer of Pd species between water (reaction medium) and polystyrene (polymer support) was confirmed for…”
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Synthesis of Poly(3,4-ethylenedioxythiophene)–Palladium Nanocomposite-coated Polymer Particles by Chemical Oxidative Seeded Dispersion Polymerization by Hamasaki, Hiroyuki, Maekawa, Yuya, Matsuzawa, Soichiro, Ohtaka, Atsushi, Nakamura, Yoshinobu, Fujii, Syuji

“…Poly(3,4-ethylenedioxythiophene)–palladium nanocomposite was deposited in situ from water-based solution onto micrometer-sized polystyrene particles. The…”
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Application of “Boomerang” Linear Polystyrene-Stabilized Pd Nanoparticles to a Series of C-C Coupling Reactions in Water by Atsushi Ohtaka, Toshiyuki Okagaki, Go Hamasaka, Yasuhiro Uozumi, Tsutomu Shinagawa, Osamu Shimomura, Ryôki Nomura

“…The application of a catch-and-release system for soluble Pd species between water (reaction medium) and polystyrene (polymer support) was examined in the…”
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Temperature-Dependent Enhancement Effects for TBD (1,5,7-Triazabicyclo[4.4.0]dec-5-ene) with 2-Methylimidazole-Intercalated α-Zirconium Phosphate as a Latent Thermal Initiator in the Reaction of Glycidyl Phenyl Ether by Shimomura, Osamu, Sasaki, Suguru, Kume, Kaori, Ohtaka, Atsushi, Nomura, Ryôki

“…The catalytic effects of 1,1,3,3-Tetramethylguanidine (TMG), 1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD), 7-Methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD),…”
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Linear polystyrene-stabilized Pt nanoparticles for aerobic alcohol oxidation and hydrogen-transfer reduction in aqueous media by Ohtaka, Atsushi, Kono, Yuki, Inui, Shigeki, Yamamoto, Syusei, Ushiyama, Tomoki, Shimomura, Osamu, Nomura, Ryôki

“…[Display omitted] ► Linear polystyrene is proven to be a useful stabilizer for Pt nanoparticles. ► The catalyst has high catalytic activity for aerobic alcohol…”
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Poly(tetrafluoroethylene)-Stabilized Metal Nanoparticles: Preparation and Evaluation of Catalytic Activity for Suzuki, Heck, and Arene Hydrogenation in Water by Ohtaka, Atsushi, Kawase, Misa, Aihara, Shunichiro, Miyamoto, Yasuhiro, Terada, Ayaka, Nakamura, Kenta, Hamasaka, Go, Uozumi, Yasuhiro, Shinagawa, Tsutomu, Shimomura, Osamu, Nomura, Ryôki

“…Poly­(tetrafluoroethylene)-stabilized Pd nanoparticles (PTFE-PdNPs) were prepared in water with 4-methylphenylboronic acid as a reductant and characterized…”
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