Search Results - "Onitsuka, Kiyotaka"

Living Cyclocopolymerization through Alternating Insertion of Isocyanide and Allene via Controlling the Reactivity of the Propagation Species: Detailed Mechanistic Investigation by Kanbayashi, Naoya, Okamura, Taka-aki, Onitsuka, Kiyotaka

“…Living cyclocopolymerization through the alternating insertion of an isocyanide and allene into palladium–carbon bond was developed based on the controlling…”
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Regio- and Enantioselective O-Allylation of Phenol and Alcohol Catalyzed by a Planar-Chiral Cyclopentadienyl Ruthenium Complex by Onitsuka, Kiyotaka, Okuda, Haruki, Sasai, Hiroaki

“…Design of an asymmetric catalyst: The planar‐chiral cyclopentadienyl ruthenium complex shown in the scheme effectively catalyzes the reactions of…”
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Polymerization of expanded l-amino acids containing terminal pyridyl groups by silver(I) ions in nonpolar solvent by Okamura, Taka-aki, Tsubouchi, Kyoko, Okada, Ayumi, Onitsuka, Kiyotaka

“…Combinations of chiral ligands with metal ions are very promising for constructing artificial architectures that lead to functional spaces, such as those…”
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Conformational Switch of Arylopeptide: Helix–Helix Transition Based on Side Chain Solvation by Ishido, Yuki, Kanbayashi, Naoya, Okamura, Taka‐aki, Onitsuka, Kiyotaka

“…Controlling the structural transition between well‐defined architectures found in living system is essential in polymer chemistry as well as material science…”
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Synthesis of Nonnatural Helical Polypeptide via Asymmetric Polymerization and Reductive Cleavage of N–O Bond by Ishido, Yuki, Kanbayashi, Naoya, Okamura, Taka-aki, Onitsuka, Kiyotaka

“…Herein, we present a novel synthetic strategy, to amino-acid-free peptide synthesis based on postpolymerization conversion, for chiral nonnatural polypeptides…”
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Folding control of a non-natural glycopeptide using saccharide-coded structural information for polypeptides by Ishido, Yuki, Kanbayashi, Naoya, Fujii, Naoka, Okamura, Taka-Aki, Haino, Takeharu, Onitsuka, Kiyotaka

“…We synthesized "glyco-arylopeptides", whose folding structure significantly changes depending on the kind of saccharide in their side chain. The saccharide…”
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New Synthetic Approach for Optically Active Polymer Bearing Chiral Cyclic Architecture: Combination of Asymmetric Allylic Amidation and Ring-Closing Metathesis Reaction by Kanbayashi, Naoya, Okamura, Taka-aki, Onitsuka, Kiyotaka

“…A new synthetic approach for optically active polymer-bearing chiral cyclic architecture is described. The polymer is prepared by a combination of asymmetric…”
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Planar-Chiral Cyclopentadienyl-Ruthenium-Catalyzed Regio- and Enantioselective Asymmetric Allylic Alkylation of Silyl Enolates under Unusually Mild Conditions by Kanbayashi, Naoya, Yamazawa, Arisa, Takii, Koichiro, Okamura, Taka-aki, Onitsuka, Kiyotaka

“…We report the asymmetric allylic alkylation of allylic chlorides with silyl enolates as a carbon nucleophile using a planar‐chiral cyclopentadienyl‐ruthenium…”
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New Method for Asymmetric Polymerization: Asymmetric Allylic Substitution Catalyzed by a Planar-Chiral Ruthenium Complex by Kanbayashi, Naoya, Okamura, Taka-aki, Onitsuka, Kiyotaka

“…A new type of asymmetric polymerization reaction by asymmetric allylic substitution catalyzed by planar-chiral cyclopentadienyl-ruthenium (Cp′Ru) complexes is…”
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Modular synthesis of optically active lactones by Ru-catalyzed asymmetric allylic carboxylation and ring-closing metathesis reaction by Takii, Koichiro, Kanbayashi, Naoya, Onitsuka, Kiyotaka

“…A new synthetic route to optically active unsaturated γ- and δ-lactones has been demonstrated via asymmetric allylic carboxylation with a planar-chiral Cp'Ru…”
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Enantioselective Intramolecular Oxidative Aminocarbonylation of Alkenylureas Catalyzed by Palladium−Spiro Bis(isoxazoline) Complexes by Tsujihara, Tetsuya, Shinohara, Toshio, Takenaka, Kazuhiro, Takizawa, Shinobu, Onitsuka, Kiyotaka, Hatanaka, Minoru, Sasai, Hiroaki

“…An enantioselective synthesis of tetrahydropyrrolo[1,2-c]pyrimidine-1,3-diones via a palladium-catalyzed intramolecular oxidative aminocarbonylation is…”
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Side-Chain-Driven Dual Structural System of Poly-Arylopeptide: Selective Helical Formation Derived from Aromatic Ring Flips on the Backbone by Ishido, Yuki, Kanbayashi, Naoya, Okamura, Taka-aki, Onitsuka, Kiyotaka

“…A methodology for producing dual structural systems of macromolecules, which involves flipping the unsymmetrical aromatic rings on the main chain is presented…”
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Efficient uptake of dimethyl sulfoxide by the desoxomolybdenum(IV) dithiolate complex containing bulky hydrophobic groups by Hasenaka, Yuki, Okamura, Taka-aki, Onitsuka, Kiyotaka

“…A desoxomolybdenum(IV) complex containing bulky hydrophobic groups and NH···S hydrogen bonds,…”
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Regulation of the Hydrolytic Activity of Mg2+-Dependent Phosphatase Models by Intramolecular NH···O Hydrogen Bonds by Okamura, Taka-aki, Furuya, Ryosuke, Onitsuka, Kiyotaka

“…Magnesium-dependent phosphatase models containing intramolecular NH···O hydrogen bonds were synthesized and structurally characterized by X-ray analysis. The…”
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Unexpected Reaction Promoted by NH+···O=Mo Hydrogen Bonds in Nonpolar Solvents by Okamura, Taka-aki, Yamada, Takayoshi, Hasenaka, Yuki, Yamashita, Satoshi, Onitsuka, Kiyotaka

“…A new synthetic method using [MoIV(S‐tBu)4], 1,2‐benzenedithiol containing bulky hydrophobic acylamino substituents, 3,6‐[(4‐tBuC6H4)3CCONH]2C6H2‐1,2‐(SH)2…”
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Synthesis and structures of soluble magnesium and zinc carboxylates containing intramolecular NH···O hydrogen bonds in nonpolar solvents by Okamura, Taka-aki, Furuya, Ryosuke, Onitsuka, Kiyotaka

“…Readily soluble magnesium and zinc carboxylates [M(Ln)2(H2O)4] (MLn2) (M = Mg, Zn; L1 = O2C-2-Ar3CCONH-6-n-BuCONHC6H3; L2 = O2C-2-Ar3CCONHC6H4; Ar =…”
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Modeling of the hydrophobic microenvironment of water-soluble molybdoenzymes in an aqueous micellar solution by Hasenaka, Yuki, Okamura, Taka-aki, Onitsuka, Kiyotaka

“…A toluene-soluble molybdenum(vi) complex containing a bulky hydrophobic substituent, (Et4N)2[Mo(VI)O2{1,2-S2-3,6-(RCONH)2C6H2}2] (R = (4-(t)BuC6H4)3C), was…”
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Two- and Three-Dimensional Smectic Ordering of Single-Handed Helical Polymers by Onouchi, Hisanari, Okoshi, Kento, Kajitani, Takashi, Sakurai, Shin-ichiro, Nagai, Kanji, Kumaki, Jiro, Onitsuka, Kiyotaka, Yashima, Eiji

“…Rodlike polymers with precisely defined architectures are ideal building blocks for self-assembled structures leading to novel nanometer-scale devices. We…”
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Regio- and Enantioselective Allylation of Indole Catalyzed by a Planar-chiral Cyclopentadienyl–Ruthenium Complex by Onitsuka, Kiyotaka, Kameyama, Chiaki, Sasai, Hiroaki

“…The reaction of cinnamyl chloride with indole in the presence of a ruthenium catalyst possessing a planar-chiral cyclopentadienyl ligand resulted in the…”
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Helical Sense Selective Polymerization of Bulky Aryl Isocyanide Possessing Chiral Ester or Amide Groups Initiated by Arylrhodium Complexes by Onitsuka, Kiyotaka, Mori, Tomoko, Yamamoto, Mari, Takei, Fumie, Takahashi, Shigetoshi

“…Bulky aryl isocyanide monomers possessing tert-butyl groups at the ortho position and chiral ester or amide groups at the para position were prepared and…”
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