Papers - KATAGIRI Kosuke
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籠型超分子および多孔性配位高分子の細孔内ゲスト分子の挙動観測 Reviewed
片桐幸輔、川幡正俊
SPring-8/SACLA利用研究成果集 12 ( 2 ) 83 - 88 2024.5
Authorship：Lead author, Corresponding author
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Investigating the synthesis and structure of [2]pseudorotaxanes assembled by crown ether as wheel component and dual-cation axle with phosphonium and ammonium cations Reviewed
Naoki Fujimoto, Koshiro Isono, Kosuke Katagiri
Journal of Molecular Structure 1259 132721_1 - 132721_6 2022.7
Authorship：Last author, Corresponding author Publisher：Elsevier {BV}
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Oxaphosphacyclophanes Constructed from a Bis(triphenylphosphine oxide) Moiety Linked by Dioxyalkyl Chains: Synthesis and Crystal Structures Reviewed
Kosuke Katagiri, Masahiro Ohara, Masahiro Ikehara, Ikkei Higashimura, Koshiro Isono
ACS Omega 5 ( 37 ) 23621 - 23630 2020.9
Authorship：Lead author, Corresponding author Publisher：American Chemical Society ({ACS})
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Photoreaction of anthracenyl phosphine oxides: Usual reversible photo- and heat-induced emission switching, and unusual oxidative P–C bond cleavage Reviewed
Kosuke Katagiri, Yukina Yamamoto, Yuhi Takahata, Ryoga Kishibe
Tetrahedron Letters 60 ( 30 ) 2026 2019.6
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Aqua coordination to attenuate the luminescence properties of europium(III)-phosphine oxide porous coordination polymers Reviewed
Katagiri Kosuke, Matsuo Naoya, Kawahata Masatoshi, Masu Hyuma, Yamaguchi Kentaro
NEW JOURNAL OF CHEMISTRY 41 ( 16 ) 8305 - 8311 2017.8
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Control of a Chiral Property of a Calix[3]aramide: The Racemization Suppressed by Intramolecular Cyclic Hydrogen Bonds and DMSO–H2O System-Induced Spontaneous Resolution Reviewed
Kosuke Katagiri, Shinsuke Komagawa, Masanobu Uchiyama, Kentaro Yamaguchi, Isao Azumaya
Organic Letters 17 3650 - 3653 2015.7
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Folded-to-unfolded structural switching of a macrocyclic aromatic hexaamide based on conformation changes in the amide groups induced by N-alkylation and dealkylation reactions Reviewed
Kosuke Katagiri, Taichi Tohaya, Riwako Shirai, Takako Kato, Hyuma Masu, Masahide Tominaga, Isao Azumaya
Journal of Molecular Structure 1082 23 - 28 2014.11
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Synthesis, Structure, and Thermal Stability of Silver(I) Coordination Polymers with Bis(pyridyl) Ligands Linked by an Aromatic Sulfonamide: One-Dimensional-Straight Chain, One-Dimensional-Columnar with Helical Components, and Two-Dimensional-Layer Network Structures Reviewed
Kosuke Katagiri, Takahiro Sakai, Maiko Hishikawa, Hyuma Masu, Masahide Tominaga, Kentaro Yamaguchi, Isao Azumaya
Crystal Growth & Design 14 199 - 206 2013.12
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Coordination Polymers and Networks Constructed from Bidentate Ligands Linked with Sulfonamide and Silver(I) Ions Reviewed
Katagiri Kosuke, Ikeda Takashi, Tominaga Masahide, Masu Hyuma, Azumaya Isao
CRYSTAL GROWTH & DESIGN 10 ( 5 ) 2291 - 2297 2010.5
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An aromatic layered foldamer based on a (cis, cis)-squaramide: chiral induction and absolute structure Reviewed
Kazusa Kuyama, Fumi Takeda, Ayano Ikeda, Kimiko Tanaka, Kosuke Katagiri, Masatoshi Kawahata, Yusuke Okada, Nagao Kobayashi, Hiroyuki Kagechika, Aya Tanatani
Organic & Biomolecular Chemistry 23 4927 - 4933 2025
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Ferrocene-Based Organic Semiconductors: Evaluating Intermolecular Transfer Integrals and Transistor Properties Reviewed
Hiroki Sano, Muneyuki Naito, Kosuke Katagiri, Shigeru Ikeda, Atsushi Kimoto, Tomofumi Kadoya
ACS Applied Electronic Materials 6 7824 - 7831 2024.11
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Acid-induced conformational switching of helical foldamers containing imidazole amide Reviewed
Sakiko Kimura, Fumi Takeda, Ayano Ikeda, Asuka Tanimoto, Kosuke Katagiri, Masatoshi Kawahata, Yusuke Okada, Nagao Kobayashi, Hiroyuki Kagechika, Aya Tanatani
Bulletin of the Chemical Society of Japan 97 ( 9 ) 1 - 6 2024.9
Publisher：Oxford University Press (OUP)
Abstract
N-Alkylated oligo- and poly(p-benzamide)s exist as dynamic helical structures with all-cis amide conformation. Imidazole N-alkylated amides also show cis conformational preference, but their major conformer is changed from cis to trans by addition of acid. Here, based on those findings, we designed and synthesized aromatic triamides 3 and hexaamides 4 containing an imidazole ring as candidate foldamers anticipated to exhibit acid-induced conformational change. X-ray structure analysis of oligomer 3c showed that it takes all-cis conformation in the crystal. In solution, all the oligoamides examined existed as an equilibrium mixture of 4 conformers, among which the major conformer was the folded all-cis structure as judged from the low-temperature 1H NMR spectra. When trifluoroacetic acid-d was added to a solution of the oligoamides in methylene chloride-d2, only 2 conformers were observed in the low-temperature 1H NMR spectra, and the major conformer was the (trans,cis) form with respect to the amide bonds of the imidazole at the 4 and 2 positions. Experimental and theoretical analysis of the CD spectra indicated that the conformation of hexaamides 4 changes upon the addition of acid. Our results suggest that N-alkylated imidazole amide can serve as a key structural motif for the construction of foldamers with acid-switchable conformation.Other Link： https://academic.oup.com/bcsj/article-pdf/97/9/uoae094/59351729/uoae094.pdf
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Solvent-Dependent Conformational Switching of N-Methyl-N,N′-diarylsquaramide Reviewed
Kimiko Tanaka, Fumi Takeda, Midori Kanda, Masatoshi Kawahata, Shinya Fujii, Kosuke Katagiri, Hyuma Masu, Hiroyuki Kagechika, Aya Tanatani
The Journal of Organic Chemistry 88 12289 - 12293 2023.9
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Conformational Properties of Aromatic Amides Bearing Imidazole Ring and Acid-Induced Trans–Cis Amide Switching Reviewed
Chiharu Takubo, Sakiko Kimura, Mami Ichinomiya, Arisa Hayakawa, Mako Murata, Ko Urushibara, Hyuma Masu, Kosuke Katagiri, Masatoshi Kawahata, Mayumi Kudo, Isao Azumaya, Hiroyuki Kagechika, Aya Tanatani
The Journal of Organic Chemistry 88 16707 - 16718 2022.9
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Crystal structures and solution behavior of cis-di(aqua)bis(2,2 '-bipyridine)cobalt(III) and related complexes
Mari Toyama, Yu Yamamoto, Takuya Yoshimoto, Kosuke Katagiri
JOURNAL OF MOLECULAR STRUCTURE 1244 2021.11
Publisher：ELSEVIER
A cobalt(III) complex bearing two 2,2'-bipyridine (bpy) ligands and two aqua ligands, cis-[Co(bpy)(2)(OH2)(2)][OTf](3)center dot H2O (1 center dot[OTf](3)center dot H2O; OTf- = CF3SO3-), was obtained from the reaction of [Co(bpy)(2)(CO3)][OTf]center dot 0.5H(2)O with aqueous HOTf (HOTf = HCF3SO3, trifluoromethanesulfonic acid). The prepared complex was characterized by single-crystal X-ray crystallographic and elemental analyses, and its solution behavior was investigated by H-1 NMR spectroscopy. Our study of 1 center dot[OTf](3)center dot H2O revealed that it is stable in water and acetone upon heating; however, in methanol and ethanol, the complex was unstable upon heating, forming [Co(bpy)(3)](3+). In addition, upon the reaction of 1 center dot[OTf](3)center dot H2O with picolinic acid (Hpic) in acetone at 295 K, [Co(bpy)(2)(pic)][OTf](2) (2 center dot[OTf](2)) was gradually and selectively precipitated from the reaction solution in 82% yield. Moreover, the reaction between 1 center dot[OTf](3)center dot H2O, NaOH, and H2O2 in water at room temperature produced the dinuclear complex [Co-2(bpy)(4)(mu-O-2)(mu-OH)][PF6](3) (3 center dot[PF6](3)) in good yield (92%) and with excellent purity. The structures of 1 center dot[OTf](3)center dot H2O and 2 center dot[PF6](2) were determined by single-crystal X-ray crystallographic analysis. (C) 2021 Elsevier B.V. All rights reserved.
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High Proportion of Chiral Crystallization of Achiral Indolyl Sulfonamides: Effect of Intermolecular Interactions Reviewed
Shoko Kikkawa, Isae Maeno, Kosuke Katagiri, Yuta Murayama, Mariko Nozawa, Hidemasa Hikawa, Isao Azumaya
Crystal Growth and Design 21 ( 8 ) 4380 - 4389 2021.8
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Accessing Improbable Foldamer Shapes with Strained Macrocycles Reviewed International coauthorship
Ko Urushibara, Yann Ferrand, Zhiwei Liu, Kosuke Katagiri, Masatoshi Kawahata, Estelle Morvan, Ryan D'Elia, Vojislava Pophristic, Aya Tanatani, Ivan Huc
Chemistry – A European Journal 27 ( 43 ) 11205 - 11215 2021.8
Publisher：Wiley
Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/chem.202101201
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Construction of Aromatic Multilayered Structures Based on the Conformational Properties of N,N’-Dimethylated Squaramide
Maiko Arimura, Kimiko Tanaka, Midori Kanda, Ko Urushibara, Shinya Fujii, Kosuke Katagiri, Isao Azumaya, Hiroyuki Kagechika, Aya Tanatani
ChemPlusChem 86 ( 1 ) 198 - 205 2021.1
Publisher：Wiley
© 2021 Wiley-VCH GmbH Squaramide is a highly rigid four-membered ring system bearing two carbonyl and two amino groups, and its derivatives have found applications in many fields. We synthesized several N,N’-dimethylated oligosquaramides linked via phenyl groups, and investigated their structures in the crystalline state and in solution. Compounds 1, 2 (bissquaramides), and 13 (trissquaramide) exist as folded structures in the crystalline state, in which the aromatic rings are located in a face-to-face position. In their multilayered structures, the benzene rings are more nearly parallel and are closer to each other, compared with those in N,N’-dimethylated oligoureas. Individual molecules of meta-connected compounds 2 and 13 show a helical structure with all-R or all-S axis chirality, but afford only racemic crystals. The NMR spectra indicated that these compounds retain well-ordered folded structures in solution. The unique steric and electronic properties of N,N’-dimethylated squaramide can provide access to novel functional aromatic multilayered and helical foldamers.
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Synthesis and chiroptical properties of cylindrical macrocycles comprising two calix[3]aramide moieties Reviewed
Yuuki Saito, Misa Satake,Ryuichi Mori,Misaki Okayasu, Hyuma Masu, Masahide Tominaga, Kosuke Katagiri, Kentaro Yamaguchi, Shoko Kikkawa, Hidemasa Hikawa and Isao Azumaya
Organic & Biomolecular Chemistry 18 230 - 236 2020
Joint Work
Publisher：Royal society of chemistry
Calix[3]aramide-based cylindrical macrocycles were synthesized by the one-step amide coupling reaction
of a monomer containing two meta-alkylaminobenzoic acid units linked by para-phenylene bridges. The
major products included a meso-form and an enantiomeric pair, with stereochemistry derived from the
direction of the amide bonds and their fixed conformation. Mirror-image ECD, VCD, and CPL spectra
were observed in the enantiomeric pair and the absolute structure was determined by comparing
measured and calculated ECD and VCD spectra. -
Hydrogen-bonded structures from adamantane-based catechols
Kawahata Masatoshi, Matsuura Miku, Tominaga Masahide, Katagiri Kosuke, Yamaguchi Kentaro
JOURNAL OF MOLECULAR STRUCTURE 1164 116 - 122 2018.7