Bis(3-methylthio-1-azulenyl)phenylmethyl Cations and Dications Connected by a 1,4-Phenylene Spacer: Synthesis and Their Electrochemical Properties

Shoji Takui, Sakata Naoko, Sekiguchi Ryuta, Ito Shunji

Organics   3 ( 4 )   507 - 519   2022.12

Benz[a]azulenequinones: Reaction of Benz[a]azulenes with Pyridinium Hydrobromide Perbromide

Shoji Taku, Yamazaki Akari, Sakata Naoko, Sekiguchi Ryuta, Ito Shunji, Yasunami Masafumi

Molbank   2022 ( 4 )   M1467   2022.10

Synthesis of phthalimides cross-conjugated with an azulene ring, and their structural, optical and electrochemical properties

Shoji Taku, Iida Nanami, Yamazaki Akari, Ariga Yukino, Ohta Akira, Sekiguchi Ryuta, Nagahata Tatsuki, Nagasawa Takuya, Ito Shunji

ORGANIC & BIOMOLECULAR CHEMISTRY   18 ( 12 )   2274 - 2282   2020.3

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

Shoji Taku, Takagaki Sho, Ariga Yukino, Yamazaki Akari, Takeuchi Mutsumi, Ohta Akira, Sekiguchi Ryuta, Mori Shigeki, Okujima Tetsuo, Ito Shunji

CHEMISTRY-A EUROPEAN JOURNAL   26 ( 9 )   1931 - 1935   2020.2

Synthesis of azuleno[2,1-b]thiophenes by cycloaddition of azulenylalkynes with elemental sulfur and their structural, optical and electrochemical properties

Shoji Taku, Miura Kota, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Endo Yuya, Nagahata Tatsuki, Mori Shigeki, Okujima Tetsuo

ORGANIC CHEMISTRY FRONTIERS   6 ( 15 )   2801 - 2811   2019.8

Preparation of a large-sized highly flexible carbon nanohoop

Nakagawa Yuta, Sekiguchi Ryuta, Kawakami Jun, Ito Shunji

ORGANIC & BIOMOLECULAR CHEMISTRY   17 ( 28 )   6843 - 6853   2019.7

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

Shoji Taku, Sugiyama Shuhei, Takeuchi Mutsumi, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Yatsu Tomoaki, Okujima Tetsuo, Yasunami Masafumi

JOURNAL OF ORGANIC CHEMISTRY   84 ( 3 )   1257 - 1275   2019.2

Synthesis of azulenophthalimides by phosphine-mediated annulation of 1,2-diformylazulenes with maleimides

Shoji Taku, Araki Takanori, Iida Nanami, Miura Kota, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Okujima Tetsuo

ORGANIC CHEMISTRY FRONTIERS   6 ( 2 )   195 - 204   2019.1

Synthesis and photophysical properties of azuleno[1 ',2 ':4,5]pyrrolo[2,1-b]quinazoline-6,14-diones: Azulene analogs of tryptanthrin

Kogawa Chieko, Fujiwara Asuka, Sekiguchi Ryuta, Shoji Taku, Kawakami Jun, Okazaki Masaaki, Ito Shunji

TETRAHEDRON   74 ( 49 )   7018 - 7029   2018.12

SYNTHESIS OF 2-AMINO-1-CYANOAZULENES: SUBSTITUENT EFFECT ON 2H-CYCLOHEPTA[b]FURAN-2-ONES TOWARD THE REACTION WITH MALONONITRILE

Shoji Taku, Sugiyama Shuhei, Miura Kota, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Mori Shigeki, Okujima Tetsuo

HETEROCYCLES   97 ( 2 )   1068 - 1081   2018.9

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

Shoji Taku, Miura Kota, Araki Takanori, Maruyama Akifumi, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Okujima Tetsuo

JOURNAL OF ORGANIC CHEMISTRY   83 ( 12 )   6690 - 6705   2018.6

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

Shoji Taku, Araki Takanori, Iida Nanami, Kobayashi Yoshiaki, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Mori Shigeki, Okujima Tetsuo, Yasunami Masafumi

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY   2018 ( 9 )   1145 - 1157   2018.3

Synthesis of azulene-substituted benzofurans and isocoumarins via intramolecular cyclization of 1-ethynylazulenes, and their structural and optical properties

Shoji Taku, Tanaka Miwa, Takagaki Sho, Miura Kota, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Moric Shigeki, Okujima Tetsuo

ORGANIC & BIOMOLECULAR CHEMISTRY   16 ( 3 )   480 - 489   2018.1

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

Ito Shunji, Sekiguchi Ryuta, Mizushima Akira, Kudo Kohei, Kawakami Jun, Shoji Taku

ARKIVOC   145 - 169   2018

SYNTHESIS OF AZULENE-SUBSTITUTED TETRAARYLPYRROLES BY REACTION OF 1-AZULENYL KETONES WITH BENZOIN AND AMMONIUM ACETATE

Shoji Taku, Takagaki Sho, Tanaka Miwa, Araki Takanori, Sugiyama Shuhei, Sekiguchi Ryuta, Ohta Akira, Ito Shunji, Okujima Tetsuo

HETEROCYCLES   94 ( 10 )   1870 - 1883   2017.10

Synthesis of 2-amino- and 2-arylazoazulenes via nucleophilic aromatic substitution of 2-chloroazulenes with amines and arylhydrazines

Shoji Taku, Sugiyama Shuhei, Araki Takanori, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Mori Shigeki, Okujima Tetsuo, Yasunami Masafumi

ORGANIC & BIOMOLECULAR CHEMISTRY   15 ( 18 )   3917 - 3923   2017.5

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

Shoji Taku, Nagai Daichi, Tanaka Miwa, Araki Takanori, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Mori Shigeki, Okujima Tetsuo

CHEMISTRY-A EUROPEAN JOURNAL   23 ( 21 )   5126 - 5136   2017.4

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

Shoji Taku, Araki Takanori, Sugiyama Shuhei, Ohta Akira, Sekiguchi Ryuta, Ito Shunji, Okujima Tetsuo, Toyota Kozo

JOURNAL OF ORGANIC CHEMISTRY   82 ( 3 )   1657 - 1665   2017.2

SYNTHESIS AND ELECTROCHEMICAL PROPERTIES OF AZULENE-SUBSTITUTED TETRACYANOBUTADIENE AND DICYANOQUINODIMETHANE CHROMOPHORES CONNECTED WITH NAPHTHALENE CORES

Shoji Taku, Maruyama Mitsuhisa, Maruyama Akifumi, Nagai Daichi, Tanaka Miwa, Sekiguchi Ryuta, Ito Shunji, Okujima Tetsuo

HETEROCYCLES   95 ( 1 )   353 - 369   2017.1

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

Shoji Taku, Miyashita Kanami, Araki Takanori, Tanaka Miwa, Maruyama Akifumi, Sekiguchi Ryuta, Ito Shunji, Okujima Tetsuo

SYNTHESIS-STUTTGART   48 ( 15 )   2438 - 2448   2016.8

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

Sekiguchi Ryuta, Kudo Shun, Kawakami Jun, Sakai Atsushi, Ikeda Hiroshi, Nakamura Hiromu, Ohta Kazuchika, Ito Shunji

Bulletin of the Chemical Society of Japan   89 ( 10 )   1260 - 1275   2016

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

Shoji Taku, Tanaka Miwa, Araki Takanori, Takagaki Sho, Sekiguchi Ryuta, Ito Shunji

RSC ADVANCES   6 ( 82 )   78303 - 78306   2016

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

Sekiguchi Ryuta, Takahashi Kei, Kawakami Jun, Sakai Atsushi, Ikeda Hiroshi, Ishikawa Aya, Ohta Kazuchika, Ito Shunji

JOURNAL OF ORGANIC CHEMISTRY   80 ( 10 )   5092 - 5110   2015.5

Synthesis and redox behavior of 1,2-dihydro-1-oxabenz[a]azulen-2-ones

Ito Shunji, Yamazaki Shohei, Kudo Shun, Sekiguchi Ryuta, Kawakami Jun, Takahashi Masayuki, Matsuhashi Takashi, Toyota Kozo, Morita Noboru

TETRAHEDRON   70 ( 17 )   2796 - 2803   2014.4

Efficient synthesis and redox behavior of a series of 6-alkyl-2-phenylazulenes

Ito Shunji, Ueda Mao, Sekiguchi Ryuta, Kawakami Jun

TETRAHEDRON   69 ( 21 )   4259 - 4269   2013.5

第3回4校学術交流会・最優秀発表賞

2014.07