Synthesis of Phthalimides Cross-Conjugated with An Azulene Ring, and their Structural, Optical and Electrochemical Properties

T. Shoji, N. Iida, A. Yamazaki, Y. Ariga, A. Ohta, R. Sekiguchi, T. Nagahata, T. Nagasawa, and S. Ito

Org. Biomol. Chem.   18 ( 12 )   2274 - 2282   2020年03月

Photophysical Properties of 2-Hydroxytryptanthrin Analog as a Near-Infrared Dye for Fluorescent Imaging

J. Kawakami, C. Osanai, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. Mat. Res. Soc. Japan)   45 ( 1 )   19 - 22   2020年02月

Molecular Transformation to Pyrroles, Pentafulvenes, and Pyrrolopyridines by [2 + 2] Cycloaddition of Propargylamines with Tetracyanoethylene

T. Shoji, S. Takagaki, Y. Ariga, A. Yamazaki, M. Takeuchi, A. Ohta, R. Sekiguchi, S. Mori, T. Okujima, and S. Ito

Chem. Eur. J.   2020年02月

Direct synthesis of 2-arylazulenes by [8 + 2] cycloaddition of 2H-cyclohepta[b]furan-2-ones with silyl enol ethers

T. Shoji, S. Sugiyama, Y. Kobayashi, A. Yamazaki, Y. Ariga, R. Kato, H. Wakui, M. Yasunami, and S. Ito

Chem. Commun.   56 ( 10 )   1485 - 1488   2020年02月

Synthesis of Azuleno[2,1-b]thiophenes by Cycloaddition of Azulenylalkynes with Elemental Sulfur and their Structural, Optical and Electrochemical Properties

T. Shoji, K. Miura, A. Ohta, R. Sekiguchi, S. Ito, Y. Endo, T. Nagahata, S. Mori, and T. Okujima

Org. Chem. Front.   6 ( 15 )   2801 - 2811   2019年08月

Aggregation-induced Emission Properties of 2-(N,N-diphenylamino)tryptanthrin

J. Kawakami, M. Harada, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. Mat. Res. Soc. Japan)   44 ( 4 )   153 - 156   2019年08月

Preparation of a Large-sized Highly Flexible Carbon Nanohoop

Y. Nakagawa, R. Sekiguchi, J. Kawakami, and S. Ito

Org. Biomol. Chem.   17 ( 28 )   6843 - 6853   2019年07月

Benzo-fused BODIPY Derivative as a Fluorescent Chemosensor for Fe3+, Cu2+, and Al3+

J. Kawakami, Y. Sasaki, K. Yanase, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. Mat. Res. Soc. Japan)   44 ( 2 )   69 - 73   2019年04月

Synthesis of 6‑Amino- and 6‑Arylazoazulenes via Nucleophilic Aromatic Substitution and Their Reactivity and Properties

T. Shoji, S. Sugiyama, M. Takeuchi, A. Ohta, R. Sekiguchi, S. Ito, T. Yatsu, T. Okujima, and M. Yasunami

J. Org. Chem.   84 ( 3 )   1257 - 1275   2019年02月

Synthesis of Azulenophthalimides by Phosphinemediated Annulation of 1,2-Diformylazulenes with Maleimides

T. Shoji, T. Araki, N. Iida, K. Miura, A. Ohta, R. Sekiguchi, S. Ito, and T. Okujima

Org. Chem. Front.   6 ( 2 )   195 - 204   2019年01月

Synthesis and Photophysical Properties of Azuleno[1’,2’:4,5]pyrrolo[2,1-b]quinazoline-6,14-diones: Azulene Analogs of Tryptanthrin

C. Kogawa, A. Fujiwara, R. Sekiguchi, T. Shoji, J. Kawakami, M. Okazaki, and S. Ito

Tetrahedron   74 ( 49 )   7018 - 7029   2018年12月

Fluorescence Emission Mechanism of Three N,N-dimethylaminotryptanthrins by Density Functional Theory Calculations

J. Kawakami, C. Osanai, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. Mat. Res. Soc. Japan)   43 ( 5 )   319 - 323   2018年09月

Synthesis of 2-Methyl-1-azulenyl Tetracyanobutadienes and Dicyanoquinodimethanes: Substituent Effect of 2-Methyl Moiety on Azulene Ring toward the Optical and Electrochemical Properties

T. Shoji, K. Miura, T. Araki, A. Maruyama, A. Ohta, R. Sekiguchi, S. Ito, and T. Okujima

J. Org. Chem.   83 ( 12 )   6690 - 6705   2018年06月

2-Hydroxy-1-((2-(pyridin-2-yl)hydrazono)methyl)tryptanthrin as a Fluorescent Chemosensor for Metal Ions

J. Kawakami, M. Sasagawa, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. Mat. Res. Soc. Japan)   43 ( 3 )   209 - 212   2018年06月

Synthesis of 2-Amino-1-cyanoazulenes: Substituent Effect on 2H-Cyclohepta[b]furan-2-ones toward the Reaction with Malononitrile

T. Shoji, S. Sugiyama, K. Miura, A. Ohta, R. Sekiguchi, S. Ito, S. Mori, and T. Okujima

Heterocycles   97 ( 2 )   1068 - 1081   2018年04月

2-Hydroxytryptanthrin and 1-Formyl-2-hydroxytryptanthrin as Fluorescent Metal-ion Sensors and Near-infrared Fluorescent Labeling Reagents

J. Kawakami, Y. Kinami, M. Takahashi, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. Mat. Res. Soc. Japan)   43 ( 2 )   109 - 112   2018年04月

Molecular Transformation of 2-Methylazulenes: An Efficient and Practical Synthesis of 2-Formyl- and 2-Ethynylazulenes

T. Shoji, T. Araki, N. Iida, Y. Kobayashi, A. Ohta, R. Sekiguchi, S. Ito, S. Mori, T. Okujima, and M. Yasunami

Eur. J. Org. Chem.   ( 9 )   1145 - 1157   2018年03月

Synthesis of Azulene-substituted Benzofurans and Isocoumarins via Intramolecular Cyclization of 1-Ethynylazulenes, and their Structural and Optical Properties

T. Shoji, M. Tanaka, S. Takagaki, K. Miura, A. Ohta, R. Sekiguchi, S. Ito, S. Mori, and T. Okujima

Org. Biomol. Chem.   15 ( 3 )   480 - 489   2018年01月

Cyanine-cyanine hybrid structure as a stabilized polyelectrochromic system: synthesis, stabilities, and redox behavior of di(1-azulenyl)methylium units connected with electron-accepting π-electron systems

S. Ito, R. Sekiguchi, A. Mizushima, K. Kudo, J. Kawakami, and T. Shoji

Arkivoc   ( part ii )   145 - 169   2017年11月

Synthesis of Azulene-substituted Tetraarylpyrroles by Reaction of 1-Azulenyl Ketones with Benzoin and Ammonium Acetate

T. Shoji, S. Takagaki, M. Tanaka, T. Araki, S. Sugiyama, R. Sekiguchi, A. Ohta, S. Ito, and T. Okujima

Heterocycles   94 ( 18 )   1870 - 1883   2017年10月

Synthesis of 2-Amino- and 2-Arylazoazulenes via Nucleophilic Aromatic Substitution of 2-Chloroazulenes with Amines and Arylhydrazines

T. Shoji, S. Sugiyama, T. Araki, A. Ohta, R. Sekiguchi, S. Ito, S. Mori, T. Okujima, and M. Yasunami

Org. Biomol. Chem.   15 ( 18 )   3917 - 3923   2017年05月

Synthesis of 2-Aminofurans by Sequential [2 + 2] Cycloaddition–Nucleophilic Addition of 2-Propyn-1-ols with Tetracyanoethylene and Amine-Induced Transformation to 6-Aminopentafulvenes

T. Shoji, D. Nagai, M. Tanaka, T. Araki, A. Ohta, R. Sekiguchi, S. Ito, S. Mori, and T. Okujima

Chem. Eur. J.   23 ( 21 )   5126 - 5136   2017年04月

Synthesis and Electrochemical Properties of Azulene-substituted Tetracyanobutadiene and Dicyanoquinodimethane Chromophores Connected with Naphthalene Cores

T. Shoji, M. Maruyama, A. Maruyama, D. Nagai, M. Tanaka, R. Sekiguchi, S. Ito, and T. Okujima

Heterocycles   95 ( 1 )   353 - 369   2017年04月

Synthesis of Azulene-substituted Benzofurans and Isocoumarins via Intramolecular Cyclization of 1-Ethynylazulenes

T. Shoji, M. Tanaka, S. Takagaki, K. Miura, A. Ohta, R. Sekiguchi, S. Ito, S. Mori, and T. Okujima

Org. Biomol. Chem.   15 ( 18 )   3917 - 3923   2017年04月

Synthesis of 2-Azulenyltetrathiafulvalenes by Palladium-Catalyzed Direct Arylation of 2-Chloroazulenes with Tetrathiafulvalene and Their Optical and Electrochemical Properties

T. Shoji, T. Araki, S. Sugiyama, A. Ohta, R. Sekiguchi, S. Ito, T. Okujima, and K. Toyota

J. Org. Chem.   82 ( 3 )   1657 - 1665   2017年02月

Preparation of a Cyclic Polyphenylene Array for a Chiral-Type Carbon Nanotube Segment

R. Sekiguchi, S. Kudo, J. Kawakami, A. Sakai, H. Ikeda, H. Nakamura, K. Ohta, and S. Ito

Bull. Chem. Soc. Jpn.   89 ( 10 )   1260 - 1275   2016年10月

Synthesis of 1-azulenyl ketones by Brønsted acid mediated hydration of 1-azulenylalkynes

T. Shoji, M. Tanaka, T. Araki, S. Takagaki, R. Sekiguchi, and S. Ito

RSC Adv.   6 ( 82 )   78303 - 78306   2016年08月

Synthesis of 1,2’-Biazulenes by Palladium-Catalyzed Unusual Homocoupling Reaction of 1-Haloazulenes in the Presence of Ferrocene

T. Shoji, K. Miyashita, T. Araki, M. Tanaka, A. Maruyama, R. Sekiguchi, S. Ito, T. Okujima

Synthesis   48 ( 15 )   2438 - 2448   2016年08月

Spectral Characteristics of Highly Fluorescent 2-(N,N-dimethylamino)tryptanthrin

J. Kawakami, T. Kadowaki, M. Ikeda, Y. Habata, S. Ito, and H. Kitahara

Transactions of the Materials Research Society of Japan (Trans. MRS-J)   41 ( 2 )   143 - 146   2016年06月

Naphthalene Ring-Fused 2-Aminotryptanthrin as a Fluorescent Chemosensor for Al3+

J. Kawakami, A. Tsuiki, S. Ito, and H. Kitahara

Transactions of the Materials Research Society of Japan (Trans. MRS-J)   41 ( 1 )   131 - 133   2016年02月

Photophysical Properties of the 2-Hydroxytryptanthrin and its Sodium Salt as Near-infrared Dyes for Fluorescent Imaging

J. Kawakami, M. Takahashi, S. Ito, and H. Kitahara

Anal. Sci.   32 ( 2 )   251 - 253   2016年02月

Synthesis and Properties of (3-Phenyl-1-azulenyl)tetracyanobetadienes and Tris(aryltetracyanobetadiene)s Connected with 1,3,5-Tri(1-azulenyl)benzene Core

T. Shoji, A. Maruyama, M. Tanaka, D. Nagai, E. Shimomura, K. Fujimori, S. Ito, T. Okujima, K. Toyota, and M. Yasunami

ChemistrySelect   1 ( 1 )   49 - 56   2016年01月

Synthesis of 2- and 6-Thienylazulenes by Palladium-catalyzed Direct Arylation of 2- and 6-Haloazulenes with Thiophene Derivatives

T. Shoji, A. Maruyama, S. Ito, and T. Okujima

Org. Biomol. Chem.   13 ( 40 )   10191 - 10197   2015年10月

Synthesis, Properties, and Redox Behavior of Ferrocenyl-1,1,4,4-tetracyano-1,3-butadienes Connected by Arylamine and Azobenzene Spacers

T. Shoji, N. Kamata, A. Maruyama, S. Ito, and T. Okujima

Bull. Chem. Soc. Jpn.   88 ( 9 )   1338 - 1346   2015年09月

Preparation of a Cyclic Polyphenylene Array for a Zigzag-Type Carbon Nanotube Segment

R. Sekiguchi, K. Takahashi, J. Kawakami, A. Sakai, H. Ikeda, A. Ishikawa, K. Ohta, and S. Ito

J. Org. Chem.   80 ( 10 )   5092 - 5110   2015年05月

Synthesis, Properties, and Redox Behavior of Tris(1-azulenyltetracyanobetadiene) and Tris[1-azulenylbis(tetracyanobetadiene)] Chromophores Connected to a 1,3,5-Tri(1-azulenyl)benzene Core

T. Shoji, A. Maruyama, E. Shimomura, D. Nagai, S. Ito, T. Okujima, and K. Toyota

Eur. J. Org. Chem.   ( 9 )   1979 - 1990   2015年03月

Synthesis, Properties, and Redox Behavior of 1,1,4,4-Tetracyano-2-ferrocenyl-1,3-butadienes Connected by Aryl, Biaryl, and Teraryl Spacers

T. Shoji, A. Maruyama, C. Yaku, N. Kamata, S. Ito, T. Okujima, and K. Toyota

Chem. Eur. J.   21 ( 1 )   402 - 409   2015年01月

Synthesis of 2,6-Diaminoazulenes by the SNAr Reaction with Cyclic Amines

T. Shoji, Y. Fujiwara, A. Maruyama, M. Maruyama, S. Ito, M. Yasunami (the late), R. Yokoyama, and N. Morita

Heterocycles   90 ( 1 )   136 - 143   2015年01月

Synthesis of 2-Aryl- and 6-Heteroaryl-1,3-di(4-pyridyl)azulenes by Katritzky’s Pyridylation of 2-Aryl- and 6-Heteroarylazulenes

T. Shoji, A. Maruyama, S. Ito, T. Okujima, M. Yasunami, J. Higashi, K. Toyota, and N. Morita

Heterocycles   89 ( 11 )   2588 - 2603   2014年11月

2-Aminotryptanthrin Derivative with Pyrene as a FRET-based Fluorescent Chemosensor for Metal Ions

J. Kawakami, A. Soma, K. Kikuchi, Y. Kikuchi, S. Ito, and H. Kitahara

Anal. Sci.   30 ( 10 )   949 - 954   2014年10月

Synthesis of 1,3-Bis(tetracyano-2-azulenyl-3-butadienyl)azulenes by the [2 + 2] Cycloaddition–Retroelectrocyclization of 1,3-Bis(azulenylethynyl)azulenes with Tetracyanoethylene

T. Shoji, M. Maruyama, A. Maruyama, S. Ito, T. Okujima, K. Toyota

Chem. Eur. J.   20 ( 37 )   11903 - 11912   2014年09月

Synthesis of 2,2’-Diamino-1,1’-biazulenes by the Copper-Catalyzed Homo-Coupling Reaction of 2-Aminoazulenes

T. Shoji, A. Maruyama, A. Yamamoto, Y. Fujiwara, S. Ito, T. Okujima, and N. Morita

Chem. Lett.   43 ( 7 )   1122 - 1124   2014年07月

Synthesis and Redox Behavior of 1,2-Dihydro-1-oxabenz[a]azulen-2-ones

S. Ito, S. Yamazaki, S. Kudo, R. Sekiguchi, J. Kawakami, M. Takahashi, T. Matsuhashi, K. Toyota, and N. Morita

Tetrahedron   70 ( 17 )   2796 - 2803   2014年04月

Synthesis, Properties, and Structure of DDQ-adducted 2H-Cyclohepta[b]furan-2-ones

T. Shoji, M. Maruyama, E. Shimomura, A. Maruyama, S. Ito, M. Yasunami, J. Higashi, K. Toyota, and N. Morita

Heterocycles   88 ( 1 )   319 - 329   2014年01月

Synthesis and Properties of 6-Methoxy- and 6-Dimethylamino-1-methylthio- and 1,3-Bis(methylthio)azulenes and Triflic Anhydride-Mediated Synthesis of Their Biaryl Derivatives

T. Shoji, A. Maruyama, M. Maruyama, S. Ito, T. Okujima, J. Higashi, K. Toyota, and N. Morita

Bull. Chem. Soc. Jpn.   87 ( 1 )   141 - 154   2014年01月

Synthesis, Properties, and Redox Behavior of Tertacyanobutadiene and Dicyanoquinodimethane Chromophores Bearing Two Azulenyl Substituent

T. Shoji, M. Maruyama, E. Shimomura, A. Maruyama, S. Ito, T. Okujima, K. Toyota, and N. Morita

J. Org. Chem.   78 ( 24 )   12513 - 12524   2013年12月

Synthesis and Properties of Azulene-substituted Donor–Acceptor Chromophores Connected by Arylamine Cores

T. Shoji, E. Shimomura, M. Maruyama, S. Ito, T. Okujima, K. Toyota, and N. Morita

Eur. J. Org. Chem.   ( 34 )   7785 - 7799   2013年12月

Universality of Molten State of Alkyl Chain in Liquid-Crystalline Mesophases: Smectic E Phase of 6-Alkyl-2-phenylazulene

T. Adachi, H. Saitoh, Y. Yamamura, M. Hishida, M. Ueda, S. Ito, and K. Saito

Bull. Chem. Soc. Jpn.   86 ( 9 )   1022 - 1027   2013年09月

Structure–Activity Relationship Analysis for Antimicrobial Activities of Tryptanthrin Derivatives Using Quantum Chemical Calculations

J. Kawakami, H. Kakinami, N. Matsushima, A. Nakane, H. Kitahara, M. Nagaki, and S. Ito

J. Comput. Chem. Jpn.   12 ( 2 )   109 - 112   2013年06月

Synthesis of 1,6’-Bi- and 1,6’:3,6’’-Terazulenes from 1-Pyridyl- and 1,3-Bis(pyridyl)azulenes by Zieglar–Hafner’s Method

T. Shoji, A. Yamamoto, Y. Inoue, E. Shimomura, M. Maruyama, S. Ito, T. Okujima, and N. Morita

Chem. Lett.   42 ( 6 )   638 - 640   2013年06月

Efficient Synthesis and Redox Behavior of A Series of 6-Alkyl-2-phenylazulenes

S. Ito, M. Ueda, R. Sekiguchi, and J. Kawakami

Tetrahedron   69 ( 21 )   4259 - 4269   2013年05月

Synthesis of 2-Azulenyl-1,1,4,4-tetracyano-3-ferrocenyl-1,3-butadienes by the [2 + 2] Cycloaddition of (Ferrocenylethynyl)azulenes with Tetracyanoethylene

T. Shoji, S. Ito, T. Okujima, and N. Morita

Chem. Eur. J.   19 ( 18 )   5721 - 5730   2013年04月

Fluorescent Solvatochromism of 2-Aminotryptanthrin

J. Kawakami, H. Kawaguchi, K. Kikuchi, A. Yamaya, S. Ito, and H. Kitahara

Transactions of the Materials Research Society of Japan (Trans. MRS-J)   38 ( 1 )   123 - 125   2013年03月

Efficient Synthesis and Redox Behavior of A Series of 6-Alkyl-2-phenylazulenes

S. Ito, M. Ueda, R. Sekiguchi, and J. Kawakami

Tetrahedron   69 ( 21 )   4259 - 4269   2013年03月

Synthesis, Properties and Redox Behavior of Ene–Diyne Scaffolds Bearing 1- and 2-Azulenyl Groups at the Periphery

T. Shoji, E. Shimomura, M. Maruyama, S. Ito, T. Okujima, and N. Morita

Eur. J. Org. Chem.   ( 5 )   957 - 964   2013年02月

Synthesis of Novel Thiophene-Fused 1,1’-Biazulene Derivative by the Reaction of Azuleno[1,2-b]thiophene with N-Iodosuccinimide

T. Shoji, E. Shimomura, Y. Inoue, M. Maruyama, A. Yamamoto, K. Fujimori, S. Ito, M. Yasunami, and N. Morita

Heterocycles   87 ( 2 )   303 - 306   2013年02月

8-Hydroxyquinoline Ligands as Fluorescent Chemosensors for Zinc and Cadmium Ions

J. Kawakami, Y. Yamauchi, M. Ohta, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. MRS-J)   37 ( 4 )   601 - 602   2012年12月

Synthesis and Solvatochromic Properties of Azulene-Substituted Donor–Acceptor-Type Polymethine Dyes

T. Shoji, A. Yamamoto, Y. Inoue, E. Shimomura, S. Ito, J. Higashi, and N. Morita

Chem. Lett.   41 ( 12 )   1644 - 1646   2012年12月

Comprehensive Characterisation of the E Phase of 6-Octyl-2-phenylazulene

T. Adachi, Y. Yamamura, M. Hishida, M. Ueda, S. Ito, and K. Saito

Liq. Cryst.   39 ( 11 )   1340 - 1344   2012年11月

Synthesis of Push-Pull Chromophores by the Sequential [2 + 2] Cycloaddition of 1-Azulenylbutadiynes with Tetracyanoethylene and Tetrathiafulvalene

T. Shoji, S. Ito, T. Okujima, and N. Morita

Org. Biomol. Chem.   10 ( 41 )   8308 - 8313   2012年11月

Synthesis and Properties of Mono-, Bis-, Tris- and Tetrakis[1,1,4,4-tetracyano-2-(1-azulenyl)-1,3-butadien-3-yl] Chromophores Connected to a Benzene Ring by Phenylethynyl- and 2-Thienylethynyl Spacers

T. Shoji, M. Maruyama, S. Ito, and N. Morita

Bull. Chem. Soc. Jpn.   85 ( 7 )   761 - 773   2012年07月

Synthesis and Redox Behavior of Cyanovinyl–Substituted 2H-Cyclohepta[b]furan-2-ones

T. Shoji, J. Higashi, S. Ito, M. Oda, M. Yasunami, and N. Morita

Heterocycles   86 ( 1 )   305 - 315   2012年05月

Synthesis of Donor–Acceptor Chromophores by the [2 + 2] Cycloaddition of Arylethynyl-2H-cyclohepta[b]furan-2-ones with 7,7,8,8-Tetracyanoquinodimethane

T. Shoji, J. Higashi, S. Ito, T. Okujima, M. Yasunami, and N. Morita

Org. Biomol. Chem.   10 ( 12 )   2431 - 2438   2012年03月

First Synthesis of 1-(Indol-2-yl)azulenes by Vilsmeier–Haack Type Arylation with Triflic Anhydride as an Activating Reagent

T. Shoji, Y. Inoue, and S. Ito

Tetrahedron Lett.   53 ( 12 )   1493 - 1496   2012年03月

First Synthesis of 2-Heteroarylazulenes by the Electrophilic Substitution of Azulene with Triflate of N-Containing Heterocycles

T. Shoji, Y. Inoue, S. Ito T. Okujima, and N. Morita

Heterocycles   85 ( 1 )   35 - 41   2012年01月

Antibacterial and Antifungal Activities of Tryptanthrin Derivatives

J. Kawakami, N. Matsushima, Y. Ogawa, H. Kakinami, A. Nakane, H. Kitahara, M. Nagaki, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. MRS-J)   36 ( 4 )   603 - 606   2011年12月

The [2+2] Cycloaddition Reaction of Ethynylated 2H-Cyclohepta[b]furan-2-ones with 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone

T. Shoji, J. Higashi, S. Ito, M. Yasunami, and N. Morita

Heterocycles   83 ( 10 )   2271 - 2274   2011年09月

Synthesis of 1-Heteroaryl- and 1,3-Bis(heteroaryl)azulenes: Electrophilic Heteroarylation of Azulenes with the Triflate of N-Containing Heteroarenes

T. Shoji, S. Ito, J. Higashi, and N. Morita

Eur. J. Org. Chem.   ( 27 )   5311 - 5322   2011年09月

Synthesis and [2+2] Cycloaddition with Tetracyanoethylene of Ene–Diyne Scaffolds Bearing Ferrocenes at the Periphery

T. Shoji, S. Ito, T. Okujima, and N. Morita

Eur. J. Org. Chem.   ( 26 )   5134 - 5140   2011年09月

Synthesis of Redox-Active Intramolecular Charge-Transfer Chromophores by the [2+2] Cycloaddition of Ethynylated 2H-Cyclohepta[b]furan-2-ones with Tetracyanoethylene

T. Shoji, J. Higashi, S. Ito, T. Okujima, M. Yasunami, and N. Morita

Chem. Eur. J.   17 ( 18 )   5116 - 5129   2011年04月

TD-DFT Study on the Fluorescent Chemosensor for Hg2+, 2-(Benzo-d-thiazol-2-yl)quinolone

R. Miyamoto, J. Kawakami, R. Ohtake, M. Nagaki, and S. Ito

J. Mol. Struct.   991 ( 1-3 )   73 - 78   2011年04月

Synthesis and Redox Behavior of Bis(3-methylthio-1-azulenyl)methyl Cations and Dications Connected by 2-Thienyl and 2,5-Thiophenediyl Spacers

T. Shoji, J. Higashi, S. Ito, T. Okujima, and N. Morita

Eur. J. Org. Chem.   ( 3 )   584 - 592   2011年01月

Antibacterial Activity of Radial Compounds with Peripheral Quaternary Ammonium Units

J. Kawakami, I. Harada, A. Nakane, H. Kitahara, M. Nagaki, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. MRS-J)   35 ( 4 )   885 - 887   2010年12月

Poly(amide amine) Dendrimers with Naphthyl Units as Fluorescent Chemosensor Materials for Metal Cations

J. Kawakami, Y. Miyamoto, T. Isobe, M. Nagaki, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. MRS-J)   35 ( 4 )   849 - 852   2010年12月

Synthesis and Liquid Crystalline Behavior of Azulene-based Liquid Crystals with 6-Hexadecyl Substituents on Each Azulene Ring

K. Nakagawa, T. Yokoyama, K. Toyota, N. Morita, S. Ito, S. Tahata, M. Ueda, J. Kawakami, M. Yokokawa, Y. Kanai, and K. Ohta

Tetrahedron   66 ( 42 )   8304 - 8312   2010年10月

Synthesis, Properties, and Redox Behavior of Ferrocene-substituted Bis(3-methylthio-1-azulenyl)methylium Ions

T. Shoji, J. Higashi, S. Ito, and N. Morita

Eur. J. Inorg. Chem.   ( 30 )   4886 - 4891   2010年10月

Synthesis of 1-(Pyridyl, quinolyl, and isoquinolyl)azulenes by Reissert-Henze Type Reaction

T. Shoji, K. Okada, S. Ito, K. Toyota, and N. Morita

Tetrahedron Lett.   51 ( 39 )   5127 - 5130   2010年09月

Synthesis of 5-Heteroaryl- and 5,7-Bis(heteroaryl)azulenes by Electrophilic Substitution of 1,3-Di-tert-butylazulene with Triflates of N-Containing Heterocycles

T. Shoji, S. Ito, K. Toyota, and N. Morita

Eur. J. Org. Chem.   ( 6 )   1059 - 1069   2010年02月

2-Aminotryptanthrin Derivative with Pyrene as a FRET-based Fluorescent Chemosensor for Al3+

J. Kawakami, K. Kikuchi, K. Chiba, N. Matushima, A. Yamaya, S. Ito, M. Nagaki, and H. Kitahara

Anal. Sci.   25 ( 12 )   1385 - 1386   2009年12月

Synthesis and Properties of Ferrocenylmethylene-Bridged Calix[4]azulene and a New Example of Bis(1-azulenyl)ferrocenylmethylium Ion

T. Shoji, J. Higashi, S. Ito, K. Toyota, T. Iwamoto, and N. Morita

Eur. J. Org. Chem.   ( 34 )   5948 - 5952   2009年12月

Toward the Preparation of Electrochromic Materials with Strong Absorption in the Near Infrared Region: Synthesis and Redox Behavior of Azulene-Substituted Enediyne Scaffoldings Connected by 9,10-Anthracenediyl Spacer

S. Ito, T. Iida, J. Kawakami, T. Okujima, and N. Morita

Eur. J. Org. Chem.   ( 31 )   5355 - 5364   2009年11月

Reactions between 1-Ethynylazulenes and 7,7,8,8-Tetracyanoquinodimethane (TCNQ): Preparation, Properties, and Redox Behavior of Novel Azulene-Substituted Redox-Active Chromophores

T. Shoji, S. Ito, K. Toyota, M. Yasunami, and N. Morita

Eur. J. Org. Chem.   ( 25 )   4316 - 4324   2009年09月

Synthesis and Redox Behavior of 1,3-Bis(methylthio-) and 1,3-Bis(phenylthio)azulenes Bearing 2- and 3-Thienyl Substituents by Palladium-catalyzed Cross-Coupling Reaction of 2- and 6-Haloazulenes with Thienylmagnesium Ate-complexes

T. Shoji, S. Ito, K. Toyota, T. Iwamoto, M. Yasunami, and N. Morita

Eur. J. Org. Chem.   ( 25 )   4307 - 4315   2009年09月

Synthesis and Redox Behavior of Ene-diyne Scaffolds that Bears Ferrocenes at the Periphery

T. Shoji, S. Ito, K. Toyota, and N. Morita

Tetrahedron Lett.   50 ( 23 )   2825 - 2827   2009年06月

Electrophilic Ipso-Substitution and Some Unique Reaction Behavior of 1,3,6-Tri-tert-butylazulene

T. Shoji, S. Ito, J. Higashi, T. Okujima, R. Yokoyama, K. Toyota, S. Ito, M. Yasunami, and N. Morita

Eur. J. Org. Chem.   ( 10 )   1554 - 1563   2009年04月

Heteroarylation of 1-Azulenyl Methyl Sulfide: Two-Step Synthetic Strategy for 1-Methylthio-3-(heteroaryl)azulenes Using the Triflate of N-Containing Heterocycles

J. Higashi, T. Shoji, S. Ito, K. Toyota, M. Yasunami, and N. Morita

Eur. J. Org. Chem.   ( 34 )   5823 - 5831   2008年12月

Synthesis, Properties, and Redox Behavior of Mono-, Bis-, and Tris[1,1,4,4-tetracyano-2-(1-azulenyl)-3-butadienyl] Chromophores Binding with Benzene and Thiophene Cores

T. Shoji, S. Ito, K. Toyota, M. Yasunami, and N. Morita

Chem. Eur. J.   14 ( 27 )   8398 - 8408   2008年09月

Synthesis and Reactivity of 3-Methylsulfinyl-2H-cyclohepta[b]furan-2-ones

J. Higashi, K. Okada, T. Shoji, K. Toyota, M. Watanabe, M. Yasunami, S. Kikuchi, S. Ito, and N. Morita

Heterocycles   76 ( 1 )   759 - 770   2008年09月

Synthesis and Intramolecular Pericyclization of 1-Azulenyl Thioketones

S. Ito, T. Okujima, S. Kikuchi, T. Shoji, N. Morita, T. Asao, T. Ikoma, S. Tero-Kubota, J. Kawakami, and A. Tajiri

J. Org. Chem.   73 ( 6 )   2256 - 2263   2008年03月

2-(Benzo-d-thiazol-2-yl)quinoline as a Fluorescent Chemosensor Material for Hg(II)

J. Kawakami, R. Ohtake, R. Miyamoto, M. Nagaki, and S. Ito

Transactions of the Materials Research Society of Japan (Trans. MRS-J)   33 ( 1 )   9 - 11   2008年03月

Synthesis and Redox Behaviors of 1-Azulenyl Sulfides and Efficient Synthesis of 1,1’-Biazulenes

T. Shoji, J. Higashi, S. Ito, K. Toyota, T. Asao, M. Yasunami, K. Fujimori, and N. Morita

Eur. J. Org. Chem.   ( 7 )   1242 - 1252   2008年03月

A Novel Approach to 5,5’-Diisopropyl-3,3’-bi-2H-cyclohepta[b]furan-2-one

N. Morita, J. Higashi, K. Okada, T. Shoji, K. Toyota, M. Watanabe, M. Yasunami, S. Kikuchi, and S. Ito

Heterocycles   73 ( 1 )   237 - 240   2007年12月

Transition Metal Free Synthesis and Pyridinylation of 1,1-Biazulene

T. Shoji, S. Ito, K. Toyota, M. Yasunami, and N. Morita

Tetrahedron Lett.   48 ( 29 )   4999 - 5002   2007年07月

Charge Transfer Induced Enhancement of Near-IR Two-Photon Absorption of 5,15-Bis(azulenylethynyl) Zinc(II) Porphyrins

K. S. Kim, S. B. Noh, T. Katsuda, S. Ito, A. Osuka, and D. Kim

Chem. Commun.   ( 24 )   2479 - 2481   2007年06月

Synthesis of 5-Heteroarylazulenes: First Selective Electrophilic Substitution for 5-Position of Azulene

T. Shoji, S. Ito, M. Watanabe, K. Toyota, M. Yasunami, and N. Morita

Tetrahedron Lett.   48 ( 17 )   3009 - 3012   2007年04月

Synthesis of Heteroarylazulenes: Transition-Metal Free Coupling Strategy of Azulene with Heterocycles

T. Shoji, R. Yokoyama, S. Ito, M. Watanabe, K. Toyota, M. Yasunami, and N. Morita

Tetrahedron Lett.   48 ( 7 )   1099 - 1103   2007年02月

Synthesis, Stabilities, and Redox Behavior of Mono-, Di-, and Tetracations Composed of Di(1-azulenyl)methylium Units Connected to a Benzene Ring by Phenyl- and 2-Thienylacetylene Spacers. A Concept of a Cyanine-Cyanine Hybrid as a Stabilized Electrochromic System

S. Ito, K. Akimoto, J. Kawakami, A. Tajiri, T. Shoji, H. Satake, and N. Morita

J. Org. Chem.   72 ( 1 )   162 - 172   2007年01月

Reaction of 2H-Cyclohepta[b]furan-2-ones with Pyridinium Salts of Trifluoromethanesulfonic Anhydride

N. Morita, T. Matsuki, M. Nakashima, T. Shoji, K. Toyota, S. Kikuchi, and S. Ito

Heterocycles   69 ( 1 )   119 - 122   2006年12月

Poly(amine ester) Dendrimer with Naphthyl Units as a Fluorescent Chemosensor for Al(III), Cu(II), and Zn(II)

J. Kawakami, T. Mizuguchi, and S. Ito

Anal. Sci.   22 ( 11 )   1383 - 1384   2006年11月

Time-dependent DFT Study of Emission Mechanism of 8-Hydroxyquinoline Derivatives as Fluorescent Chemosensors for Metal Ions

R. Miyamoto, J. Kawakami, S. Takahashi, S. Ito, M. Nagaki, and H. Kitahara

J. Comput. Chem. Jpn.   5 ( 3 )   19 - 22   2006年03月

The Synthesis of Heteroarylazulene

T. Shoji, S. Kikuchi, S. Ito, and N. Morita

Heterocycles   66 ( 1 )   91 - 94   2005年12月

Poly(amide amine) Dendrimer with Naphthyl Units as a Fluorescent Chemosensor for Metal Ions

J. Kawakami, T. Isobe, Y. Sasaki, S. Ito, M. Nagaki, and H. Kitahara

Anal. Sci.   21 ( 7 )   729 - 730   2005年07月

Synthesis and Properties of Hexakis(6-octyl-2-azulenyl)benzene as a Multielectron Redox System with Liquid Crystalline Behavior

S. Ito, M. Ando, A. Nomura, N. Morita, C. Kabuto, H. Mukai, K. Ohta, J. Kawakami, A. Yoshizawa, and A. Tajiri

J. Org. Chem.   70 ( 10 )   3939 - 3949   2005年05月

Synthesis and Dynamic Stereochemistry of Azulene-Substituted 9-Fluorenyl, 9,10-Dihydro-10,10-dimethyl-9-anthryl, 10,11-Dihydro-5H-dibenzo[a,d]cyclohepten-5-yl, and 5H-Dibenzo[a,d]cyclohepten-5-yl Cations. Correlations of Stabilities of the Carbocations and Rotational Barrier of Azulene Ring

S. Ito, J. Kawakami, A. Tajiri, D. Ryuzaki, N. Morita, T. Asao, M. Watanabe, and N. Harada

Bull. Chem. Soc. Jpn.   78 ( 11 )   2051 - 2065   2005年04月

Azulene-Substituted Aromatic Amines. Synthesis and Amphoteric Redox Behavior of N,N-Di(6-azulenyl)-p-toluidine and N,N,N',N'-Tetra(6-azulenyl)-p-phenylene- diamine and their Derivatives

S. Ito, T. Kubo, N. Morita, T. Ikoma, S. Tero-Kubota, J. Kawakami, and A. Tajiri

J. Org. Chem.   70 ( 6 )   2285 - 2293   2005年03月

A Practical Spectroscopic and Theoretical Approach to Study the Electrochromism in Molecular-Based Materials: The Case of a Family of Dendrimeric-Like Poly(6-azulenylethynyl)benzenes

J. Casado, R. P. Ortiz, J. T. L. Navarrete, S. Ito, and N. Morita

J. Phys. Chem. B   108 ( 48 )   18463 - 18471   2004年12月

Synthesis of Azulen-3-ylheterocyclic Using 2-(1-Methoxycarbonylazulen-3-yl)ethynyltriphenylphosphonium Bromide

N. Morita, S. Moriyama, T. Shoji, M. Nakashima, M. Watanabe, S. Kikuchi, S. Ito, and K. Fujimori

Heterocycles   64 ( 1 )   305 - 316   2004年12月

Efficient Preparation of 2-Azulenylboronate and Miyaura-Suzuki Cross-Coupling Reaction with Aryl Bromides for Easy Access to Poly(2-azulenyl)benzenes

S. Ito, T. Terazono, T. Kubo, T. Okujima, N. Morita, T. Murafuji, Y. Sugihara, K. Fujimori, J. Kawakami, and A. Tajiri

Tetrahedron   60 ( 25 )   5357 - 5366   2004年06月

Electrochromic Application of Enediyne Scaffolding as a Redox-Active Chromophore. Synthesis and Redox Behavior of 9,10-Bis[3-(6-azulenyl)-1- (6-azulenylethynyl)-2-propynylidene]-9,10-dihydroanthracenes

S. Ito, H. Inabe, N. Morita, and A. Tajiri

Eur. J. Org. Chem.   ( 8 )   1774 - 1780   2004年04月

Preparation of azulenyllithium and magnesium reagents utilizing halogen–metal exchange reaction of several iodoazulenes with organolithium or magnesium ate complex

S. Ito, T. Kubo, N. Morita, Y. Matsui, T. Watanabe, A. Ohta, K. Fujimori, T. Murafuji, Y. Sugihara, and A. Tajiri

Tetrahedron Lett.   45 ( 14 )   2891 - 2894   2004年03月

Competition between Intramolecular Electron-Transfer and Energy-Transfer Processes in Photoexcited Azulene-C60 Dyad

T. Makinoshima, M. Fujitsuka, O. Ito, S. Ito, and N. Morita

J. Phys. Chem. A.   108 ( 3 )   368 - 375   2004年01月

Synthesis of Azulenylheterocyclic Compounds using 2-(2-Azulenyl)ethynyltriphenylphosphonium Bromide

S. Ito, S. Moriyama, M. Nakashima, M. Watanabe, T. Kubo, M. Yasunami, K. Fujimori, and N. Morita

Heterocycles   61 ( 1 )   339 - 348   2003年12月

Synthesis, Stability, and Redox Behavior of Di(1-azulenyl)(6-azulenyl)methylium Hexafluorophosphates. Generation of a Donor-Acceptor Substituted Neutral Radical by Azulenes

S. Ito, T. Kubo, N. Morita, T. Ikoma, S. Tero-Kubota, and A. Tajiri

J. Org. Chem.   68 ( 25 )   9753 - 9762   2003年12月

Synthesis of 2-Aminoazulene Derivatives. Nucleophilic and Palladium-Catalyzed Amination of 2-Substituted Azulene

R. Yokoyama, S. Ito, T. Okujima, T. Kubo, M. Yasunami, A. Tajiri, and N. Morita

Tetrahedron   59 ( 41 )   8191 - 8198   2003年10月

Synthesis, Stability and Bonding Situation of Tris-, Bis- and Mono[9-(azuleno[1,2-b]thienyl)]methyl Cations

S. Ito, T. Kubo, M. Kondo, C. Kabuto, N. Morita, T. Asao, K. Fujimori, M. Watanabe, N. Harada, and M. Yasunami

Org. Biomol. Chem.   1 ( 14 )   2572 - 2580   2003年07月

Preparation, Characterization, and Cycloaddition Reaction of the Heterocumulenes Attached Directly to Azulenes. An Efficient Strategy for the Preparation of Azulene-Substituted Heterocycles

S. Ito, T. Okujima, C. Kabuto, and N. Morita

Tetrahedron   59 ( 25 )   4651 - 4659   2003年06月

Reaction of Azulenes with 1-Trifluoromethanesulfonylpyridinium Trifluoromethanesulfonate (TPT) and Synthesis of the Parent Azulene

S. Ito, R. Yokoyama, T. Okujima, T. Terazono, T. Kubo, A. Tajiri, M. Watanabe, and N. Morita

Org. Biomol. Chem.   1 ( 6 )   1947 - 1952   2003年06月

Substrate Specificities of Medium-Prenylchain Elongating Enzymes, Hexaprenyl- and Heptaprenyl Diphosphate Synthases

M. Nagaki, K. Kuwahara, K. Kimura, J. Kawakami, Y. Maki, S. Ito, N. Morita, T. Nishino, and T. Koyama

J. Mol. Catal. B: Enzymatic   22 ( 1-2 )   97 - 103   2003年04月

Synthesis of Poly(6-azulenylethynyl)benzene Derivatives as a Multi-Electron Redox System with Liquid Crystalline Behavior

S. Ito, H. Inabe, N. Morita, K. Ohta, T. Kitamura, and K. Imafuku

J. Am. Chem. Soc.   125 ( 6 )   1669 - 1680   2003年02月

Synthesis, Absolute Configuration and Conformation of Optically Active 1,2-Homoheptafulvalene

S. Ito, M. Kurita, S. Kikuchi, T. Asao, Y. Ito, M. Oda, H. Sotokawa, A. Tajiri, and N. Morita

Org. Biomol. Chem.   1 ( 3 )   488 - 492   2003年02月

Azulene-based Donor-Acceptor Systems: Synthesis, Optical and Electrochemical Properties

T. Shoji and S. Ito

Chem. Eur. J.   23 ( 66 )   16696 - 16709   2017年12月

新規導入機器の紹介　元素分析装置

伊東俊司

弘前大学　機器分析センター年報   ( 5 )   3 - 6   2011年12月

Recent Advances in the Development of Methods for the Preparation of Functionalized Azulenes for Electrochromic Applications

S. Ito, T. Shoji, and N. Morita

Synlett   ( 16 )   2279 - 2298   2011年10月

Creation of Stabilized Electrochromic Materials by Taking Advantage of Azulene Skeletons

S. Ito and N. Morita

Eur. J. Org. Chem.   ( 27 )   4567 - 4579   2009年9月

The Chemistry of 2H-Cyclohepta[b]furan-2-one: Synthesis, Transformation and Spectral Properties

N. Morita, K. Toyota, and S. Ito

Heterocycles   78 ( 8 )   1917 - 1954   2009年8月

アズレン化学の展望と応用

齋藤勝裕、川俣　純、伊東俊司

未来材料   8 ( 10 )   32 - 38   2008年9月

新規導入機器の紹介　フーリエ変換高分解能核磁気共鳴装置

伊東俊司

弘前大学　機器分析センター年報   ( 1 )   4 - 7   2008年2月

アズレン環の特性を活かした有機機能性物質の創出

伊東俊司、森田　昇、久保貴弘

有機合成化学協会誌   62 ( 8 )   766 - 777   2004年8月

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