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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



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

Shinshu University , (Faculty of Science) , 1991


Books, Articles, etc.
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

Acta Cryst.,E68:o2843 2012
Author:A. Ohta, K. Hattori, T. Kobayashi, H. Naito, T. Kawase, C. Kitamura

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,