論文 Synthesis of phthalimides cross-conjugated with an azulene ring, and their structural, optical and electrochemical properties Org. Biomol. Chem.,18:2274-2282 2020 Author:T. Shoji, N. Iida, A. Yamazaki Y. Ariga, A. Ohta, R. Sekiguchi, T. Nagahata, T. Nagasawa, S. Ito
Molecular Transformation to Pyrroles, Pentafulvenes, andPyrrolopyridines by [2+2] Cycloaddition of Propargylamines withTetracyanoethylene Chem. Eur. J.,26:1931-1935 2020 Author:T. Shoji, S. Takagaki, Y. Ariga, A.Yamazaki, M. Takeuchi, A. Ohta, R. Sekiguchi, S.i Mori, T. Okujima, S. Ito
Synthesis of azuleno[2,1-b]thiophenes by cycloaddition of azulenylalkynes with elemental sulfur and their structural, optical and electrochemical properties Org. Chem. Front.,6:2801-2811 2019 Author:T. Shoji, K. Miura, A. Ohta, R. Sekiguchi, S. Ito, Y. Endo, T. Nagahata, S. Mori, T. Okujima
Synthesis of azulenophthalimides by phosphine-mediated annulation of 1,2-diformylazulenes with maleimides Org. Chem. Front.,6:195-204 2019 Author:T. Shoji, T. Araki, N. Iida, K. Miura, A. Ohta, R. Sekiguchi, S. Ito, T. Okujima
Synthesis of 6-Amino- and 6-Arylazoazulenes via Nucleophilic Aromatic Substitution and Their Reactivity and Propertie J. Org. Chem.,84:1257-1275 2019 Author:T. Shoji, S. Sugiyama, M. Takeuchi, A. Ohta, R. Sekiguchi, S.i Ito, T. Yatsu, T. Okujima, M. Yasunami
Synthesis of azulenophthalimides by phosphine-mediated annulation of 1,2-diformylazulenes with maleimides Org. Chem. Front.,6:195-204 2019 Author:T. Shoji, T. Araki, N. Iida, K. Miura, A. Ohta, R. Sekiguchi, S. Ito, T. Okujima
Synthesis of 6-Amino- and 6-Arylazoazulenes via Nucleophilic Aromatic Substitution and Their Reactivity and Properties J. Org. Chem.,84:31257-1275 2019 Author:T. Shoji, S. Sugiyama, M. Takeuchi, A. Ohta, R.Sekiguchi, S. Ito, T. Yatsu, T. Okujima, M. Yasunami
Synthesis of azuleno[2,1-b]thiophenes by cycloaddition of azulenylalkynes with elemental sulfur and their structural, optical and electrochemical properties Org. Chem. Front.,6:2801-2811 2019 Author:T. Shoji, K. Miura, A. Ohta, R. Sekiguchi, S. Ito, Y. Endo, T. Nagahata, S. Mor, T. Okujima
Synthesis of 2-Methyl-1-azulenyl Tetracyanobutadienes and Dicyanoquinodimethanes: Substituent Effect of 2-Methyl Moiety on the Azulene Ring toward the Optical and Electrochemical Properties. J. Org. Chem.,83:6690-6705 2018 Author:T. Shoji; K. Miura; T. Araki; A. Maruyama; A. Ohta; R. Sekiguchi; S. Itoi; T. Okujima.
Molecular Transformation of 2-Methylazulenes: An Efficient and Practical Synthesis of 2-Formyl- and 2-Ethynylazulenes. Eur. J. Org. Chem.,2018:1145-1157 2018 Author:T. Shoji; T. Araki; N. Iida; Y. Kobayashi; A. Ohta; R. Sekiguchi; S. Itoi; S. Mori; T. Okujima; Y. Yasunami.
Synthesis of azulene-substituted benzofurans and isocoumarins via intramolecular cyclization of 1-ethynylazulenes, and their structural and optical properties. Org. Biomol. Chem.,16:480-489 2018 Author:T. Shoji; M. Tanaka; S. Takagaki; K. Miura; A. Ohta; R. Sekiguchi; S. Itoi; S. Mori; T. Okujima.
Synthesis of azulene-substituted tetraarylpyrroles by reaction of 1-azulenyl ketones with benzoin and ammonium acetate. Heterocycles,94:1870-1883 2017 Author:T. Shoji; S. Takagaki; M. Tanaka; T. Araki; S. Sugiyama; R. Sekiguchi; A. Ohta; S. Itoi; T. Okujima.
Synthesis of 2-amino- and 2-arylazoazulenes via nucleophilic aromatic substitution of 2-chloroazulenes with amines and arylhydrazines Org. Biomol. Chem.,15:3917-3923 2017 Author:T. Shoji, S. Sugiyama, T. Araki, A. Ohta, R. Sekiguchi, S. Ito, S. Mori, T. Okujima, M. Yasunami
Synthesis of 2-Aminofurans by Sequential [2+2] Cycloaddition-Nucleophilic Addition of 2-Propyn-1-ols with Tetracyanoethylene and Amine-Induced Transformation into 6-Aminopentafulvenes Chem. Eur. J.,23:5126-5136 2017 Author:T. Shoji, D. Nagai, M. Tanaka, T. Araki, A. Ohta, R. Sekiguchi, S. Ito, S. Mori, T. Okujima
Synthesis of 2-Azulenyltetrathiafulvalenes by Palladium-Catalyzed Direct Arylation of 2-Chloroazulenes with Tetrathiafulvalene and Their Optical and Electrochemical Properties J. Org. Chem.,82:1657-1665 2017 Author:T. Shoji, T. Araki, S. Sugiyama, A. Ohta, R. Sekiguchi, S. Ito, T. Okujima, K. Toyota
Micropore Formation of [Zn2(Oxac) (Taz)2]·(H2O)2.5 via CO2 Adsorption Langmuir,33:680-684 2017 Author:M. Zubir, A.Hamasaki, T. Iiyama, A. Ohta, H. Ohki, S. Ozeki
Novel Synthetic Methods for Disubstituted Pyrroles from Pyrrolidine and 2-Substituted 1-Pyrrolines IJSRSET,2:424-435 2016 Author:M. Oda, S. Ito, Y. Fukuchi, S. Kato, Y. Fujiwara, Y. Kumai, K. Ariyasu, A. Ohta, S. Kuroda, and R. Miyatake
Synthesis and Stability of 1,1-Diphenyl-1H-azulenium Cation Am. J. Org. Chem.,6:8-16 2016 Author:M. Oda, N. Nakajima, Y. Kumai, A. Ohta, R. Miyatake, and S. Kuroda
Magnetic Field Control of Micropore Formation in [Zn2(Oxac)(Taz)2]·(H2O)x Chem. Lett.,45:362-364 2016 Author:M. Zubir, A. Hamasaki, T. Iiyama, A. Ohta, H. Ohki, and S. Ozeki,
A Short-Step Synthesis of syn-1,6:8,13-Dimethano[14]annulene Dicarboximides Am. J. Org. Chem.,5:105-111 2015 Author:M. Oda, M. Neha, Y. Kumai, A. Ohta, R. Miyatake, Y. Zhang, and S. Kuroda
Synthesis and Spectrocsopic Properties of 1H-Cyclohepta[2,1-b:3,4-b’]diindole and Molecular Structure of its Protonated Species Am. J. Org. Chem.,5:10-13 2015 Author:Y. Kumai, R. Miyatake, Y. Sugeno, A. Ohta, and Mitsunori Oda
Synthesis and Properties of 2,6-Bis(1-Azaazulen-2-yl)-Pyridine Mod. Chem.,2:14-17 2015 Author:M. Oda, Y. Yamaga, Y. Kumai, A. Ohta, and R. Miyatake
Redox Responsive Polymer Incorporated with Mesogenic Unit and Bis(benzodithiolyl)bithienyl Scaffold Heterocycles,90(2):811-818 2015 Author:Toshihiro Ohtake, Hideki Tanaka, Tetsuro Matsumoto, Mutsumi Kimura, and Akira Ohta
Unusually Efficient Deformylative Synthesis of 1,2,8,9-Tetrasubstituted Dipyrrins from 4,5-Disubstituted Pyrrole-2-carbaldehydes Heterocycles,90:238-251 2015 Author:Mitsunori Oda, Yurie Fujiwara, Yoshimitsu Kumai, Akira Ohta, and Ryuta Miyatake
An improved synthesis of arenedicarboximides by phosphine-assisted annulation of arene-1,2-dicarbaldehyde with N-substituted maleimide Mod. Chem.,2:29-35 2014 Author:M. Oda, H. Shimosasa, Y. Kumai, A. Ohta, and R. Miyatake
Deformation of Redox-Active Polymer Gel Based on Polysiloxane Backbone and Bis(benzodithiolyl)bithienyl Scaffold Langmuir,30:14680-14685 2014 Author:Toshihiro Ohtake, Hideki Tanaka, Tetsuro Matsumoto, Akira Ohta, and Mutsumi Kimura
Redox-Driven Molecular Switches Consisting of Bis(benzodithiolyl)bithienyl Scaffold and Mesogenic Moieties: Synthesis and Complexes with Liquid Crystalline Polymer J. Org. Chem.,74:6590-6602 2014 Author:Toshihiro Ohtake, Hideki Tanaka, Tetsuro Matsumoto, Mutsumi Kimura, and Akira Ohta
A Short-Step Synthesis of 1,6-Methano[10]annulene-3,4-dicarboximides and Their Benzene-, Naphthalene-, and Thiophene-Annulated Compounds Eur. J. Org. Chem,2014:5976-5985 2014 Author:Mitsunori Oda, Tomomi Nakamura, Miyako Neha, Daisuke Miyawaki, Akira Ohta, Shigeyasu Kuroda and Ryuta Miyatake
2,6-Dimethoxy-9,10-anthraquinone Acta Cryst.,E68:o2843 2012 Author:A. Ohta, K. Hattori, T. Kobayashi, H. Naito, T. Kawase, C. Kitamura
2,3,6,7-Tetramethoxy-9,10-anthraquinone Acta Cryst.,E68:o2587 2012 Author:A. Ohta, K. Hattori, T. Kawase, T. Kobayashi, H. Naito, and C. Kitamura
Effects of Alkoxy Substitution on the Optical Properties of 9,10-Anthraquinone and Anthracene: 2,3,6,7-Tetrapropoxy-substituted vs. 2,6-Dipropoxy-substituted Derivatives Chem. Lett.,41:674-676 2012 Author:A. Ohta, K. Hattori, Y. Kusumoto, T. Kawase, T. Kobayashi, H. Naito, and C. Kitamura
Preparation of Azulene Substituted Pyrazine and Quinoxaline Derivatives Heterocycles,77:1079-1088 2009 Author:N. Furuta, T. Mizutani, A. Ohta, and K. Fujimori
Out-of-plane Deformation of the Azulene Ring along Its Short Molecular Axis in Crystal and Theoretical Structures of 1,3-Diheterolyl- and 1,3-Diphenylazulenes Heterocycles,79:451-470 2009 Author:A. Ohta, S. Kuroda,N. C. Thanh, K. Terasawa, K. Fujimori, K. Nakajima, and M. Oda
Synthesis of 1,2-Azulenequinone Derivatives by Bromine-Oxidation Heterocycles,76:1133-1140 2008 Author:H. Wakabayashi, O. Irinamihira, S. Shibata, T. Kurihara, Y. Uchiyama, A. Ohta, and K. Fujimori
Synthesis and properties of bis(1,3-Benzodithiole)-type redox systems containing a xylyl rotator unit: A new type of redox-responsive molecular rotor Heterocycles,74:251-257 2007 Author:Y. Uchiyama, A. Ohta, and K. Fujimori
Preparation of new nitrogen-bridged heterocycles. 60. Syntheses and conformational analyses of bis(indolizin-1-yl) Disulfides Chem. Pharm. Bull.,55(10):1458-1465 2007 Author:A. Kakehi, H. Suga, H. Okuno, M. Okuhara, and A. Ohta
Synthesis and properties of novel bis(1,3-benzodithiolium)-type dications containing a biaryl unit: new redox systems undergoing reversible structural changes by electron transfer. Heterocycles,69(1):365-375 2006 Author:A. Ohta, C. Ueki, Y. Uchiyama, and K. Fujimori
Out-of-plane deformation of the azulene ring in crystal structures of simply substituted azulene derivatives. Tetrahedron Lett.,47(16):2815-2819 2006 Author:A. Ohta, N. C. Thanh, K. Terasawa, K. Fujimori, S. Kuroda, and M. Oda
Novel 9,10-bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene derivatives bridged by a crown ether unit at the 1,8-positions: a new type of redox-switchable hosts undergoing reversible structural changes. Heterocycles,67(2):665-678 2006 Author:A. Ohta, T. Numae, Y. Yamashita, and K. Fujimori
Poly(benzyl ether) dendrimers with strongly fluorescent distyrylbenzene cores as the fluorophores for peroxyoxalate chemiluminescence: insulating effect of dendritic structures on fluorescent sites. Tetrahedron,61(46):11020-11026 2005 Author:R. Koike, Y. Katayose, A. Ohta, J. Motoyoshiya,, Y. Nishii, and H. Aoyama
Preparation of azulenyllithium and magnesium reagents utilizing halogen-metal exchange reaction of several iodoazulenes with organolithium or magnesium ate complex Tetrahedron Lett.,45(14):2891-2894 2004 Author:S. Ito, T. Kubo, N. Morita, Y. Matsui, T. Watanabe, A. Ohta, K. Fujimori, T. Murafuji, Y. Sugihara, and A. Tajiri
Preparation and structure of Di(2-azulenyl)ketene adducts. gamma-lactone and beta-lactam derivatives. Heterocycles,62:463-478 2004 Author:S. Ito, H. Hamazaki, Y. Hirasawa, A. Ohta, K. Fujimori, N. Tanaka, and M. Shiro
Preparation of new nitrogen-bridged heterocycles. 56. Syntheses and reactions of 1-[2,2-bis(alkylthio)-1-(ethoxycarbonylacetyl)vinyl]pyridinium salts. Chem. Pharm. Bull.,52(11):1316-1321 2004 Author:A. Kakehi, H. Suga, Y. Yamauchi, K.Yasuraoka, T. Kobayashi, and A. Ohta
Synthesis of azulenequinones fused with thiophene and furan. Heterocycles,61:271-279 2003 Author:H. Matsuo, K. Fujimori, A. Ohta, A. Kakehi, M. Yasunami, and T. Nozoe
Neighboring group effect of pyridazine and pyrazine rings for p -facial selectivity in the reactions of fused isopropylidenenorbornene systems with electrophilic reagents. J. Chem. Soc., Perkin Trans. 1,:1372-1385 2001 Author:T. Kobayashi,K. Miki, B. Nikaeen, andA. Ohta
Preparation, structure, and properties of 1,3-bis-(1,4-dithiafulven-6-yl)azulenes. Heterocycles,54:377-385 2001 Author:A. Ohta, K. Yamaguchi, N. Fujisawa, Y. Yamashita, and K. Fujimori
Preparation, properties, and oxidation of novel bis(1,3-dithiole)compounds containing a di(2-thienyl)methane unit Heterocycles,44:263-276 1997 Author:A. Ohta and Y. Yamashita
Novel bis(1,3-dithiole) electron donors by oxidative intramolecular cyclization of 2,2'-bis(1,4-dithiafulven-6-yl)-3,3'-bithienyls. Mol. Cryst. Liq. Cryst.,296:1-18 1997 Author:A. Ohta and Y. Yamashita
Preparation andproperties of tris(1,3-dithiole) donors containing thiophene spacer units. Heterocycles,40:123-126 1995 Author:A. Ohta and Y. Yamashita
Preparation and properties of bis[5-(6-methyl-1,4-dithiafulven-6-yl)-2-thienyl]methanes affording near-infrared absorbing cations by oxidation. J. Chem. Soc., Chem., Commun.,:557-558 1995 Author:A. Ohta and Y. Yamashita
Oxidative intramolecular cyclization of 2,2'-bis(1,4-dithiafulven-6-yl)-3,3'-bithienyls affording novel bis(1,3-dithiole) electron donors. J. Chem. Soc., Chem., Commun.,:1761-1762 1995 Author:A. Ohta and Y. Yamashita
Preparation of thienyl-substituted fulvalene and tetrathiafulvalene vinylogens as electron donors and conductive complexes derived from one of them. J. Chem. Soc., Chem., Commun.,(5):431-432 1993 Author:A. Ohta, T. Kobayashi, and H. Kato,
Hetero-analogs of Hueckel degenerate systems and related compounds: preparation of thienyl-substituted fulvalene and electron-donating tetrathiafulvalene vinylogues and conductive complexes. J. Chem. Soc., Perkin Trans. 1,(8):905-911 1993 Author:A. Ohta, T. Kobayashi, and H. Kato,
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