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OHTA Akira

Academic OrganizationAcademic Assembly School of Science and Technology Institute of ScienceTEL
Education and Research OrganizationFaculty of Science Department of ScienceFAX
PositionProfessorMail Address
AddressWeb site

Modified:07/26/2019

Profile

Assigned Class
Graduate School, Division of Science and Technology
Research Field
Organic chemistry
Academic Background
Graduate School
The Graduate University for Advanced Studies , (Graduate School, Division of Mathematical and Physical Science) , 1996
Shinshu University , (Graduate School, Division of Natural Science) , 1993

College
Shinshu University , (Faculty of Science) , 1991

Degree
Doctor of Science

Research

Books, Articles, etc.
Articles
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.,: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. Euro. 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,