Papers - SEKIGUCHI RYUTA
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Isoindigo analog fused by the seven-membered ring of azulene: synthesis of (E)-1,1′-dihexyl-5,7,5′,7′-tetramesityl-(3,3′-biazuleno[6,5-b]pyrrolylidene)-2,2′-dione with near-infrared absorption properties
Uchiyama Ikumi, Sekiguchi Ryuta, Shoji Taku, Ito Shunji
Tetrahedron Letters 179 156012 2026.2
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Huisgen Cycloaddition of Azidoazulenes: Synthesis, Structural and Optical Properties of 2- and 6-(1,2,3-Triazol-1-yl)azulenes
Shoji Taku, Yoshida Miku, Iwabuchi Masayuki, Furuhata Mitsuki, Mori Shigeki, Okujima Tetsuo, Uchiyama Ikumi, Sekiguchi Ryuta, Ito Shunji
31 221 2026.1
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Azulenes exhibiting solid-state fluorescence: Synthesis and photophysics of 2-aryl-6-pyrrolidinylazulenes
Shoji Taku, Ariga Yukino, Ito Daichi, Ito Fuyuki, Hamasaki Atom, Mori Shigeki, Okujima Tetsuo, Sekiguchi Ryuta, Ito Shunji
Chemical Communications 61 19481 - 19484 2025.11
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Synthesis of 11H-Indeno[2,1-a]azulenes and Transformation into Azulene-Fused Dicyanobenzofulvenes
Iwabuchi Masayuki, Yoshida Miku, Ando Daichi, Mori Shigeki, Okujima Tetsuo, Sekiguchi Ryuta, Ito Shunji, Yasunami Masafumi, Shoji Taku
The Journal of Organic Chemistry 90 ( 45 ) 15972 - 15996 2025.10
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Synthesis and Properties of 10-Aryl-11H-indeno[2,1-a]azulenes and Azuleno[2,1-a]indenones
Shoji Taku, Ando Daichi, Iwabuchi Masayuki, Yoshida Miku, Mori Shigeki, Okujima Tetsuo, Kamayachi Takumi, Sekiguchi Ryuta, Ito Shunji
European Journal of Organic Chemistry 28 e202500694 2025.10
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Synthesis of naphth[2,1-a]azulenes via [8 + 2] cycloaddition of 2H-cyclohepta[b]furan-2-ones, and their reactivity, optical, and structural properties
Shoji Taku, Yamazaki Akari, Yoshida Miku, Yasunami Masafumi, Kamayachi Takumi, Uchiyama Ikumi, Mori Shigeki, Okujima Tetsuo, Sekiguchi Ryuta, Ito Shunji
Organic & Biomolecular Chemistry 23 10088 - 10099 2025.10
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Self-template Synthesis of Nanoporous Carbons from π-conjugated Ionic Liquids with Aromatic Functionalities
Seki Toshinori, Futamura Ryusuke, Nakamura Kento, Murata Yumeto, Sekiguchi Ryuta, Iiyama Taku
Absorption 31 55 2025.3
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Azulene-fused polycyclic aromatic hydrocarbons: synthesis, structural, optical, and electrochemical properties of azuleno[2,1-a]phenalenones
Shoji Takui; Sakata Naoko; Ishikawa Ryunosuke; Mori Shigeki; Okujima Tetsuo; Sekiguchi Ryuta; Ito Shunji
ChemistryEurope 3 e202500039 2025.3
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Synthesis of 2-Amino-4-arylazulenes from 8-Aryl-2H-cyclohepta[b]furan-2-ones and Transformation into 6-Aryl-7H-naphth[3,2,1-cd]azulen-7-ones
Shoji Taku, Ando Daichi, Iwabuchi Masayuki, Hamasaki Atom, Mori Shigeki, Okujima Tetsuo, Sekiguchi Ryuta, Ito Shunji
The Journal of Organic Chemistry 89 ( 22 ) 16375 - 16389 2024.11
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Synthesis and Properties of 3,8-Diaryl-2H-cyclohepta[b]furan-2-ones
Shoji Taku, Ando Daichi, Iwabuchi Masayuki, Okujima Tetsuo, Sekiguchi Ryuta, Ito Shunji
Organics 5 ( 3 ) 252 - 262 2024.8
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特異な光学特性を示す縮環アズレン類の創出
庄子卓, 関口龍太, 伊東俊司
有機合成化学協会誌 82 684 - 696 2024.7
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Synthesis, Structural, and Optical Properties of Azuleno[1,2-c]pyran-1-ones: Bro̷nsted Acid-Mediated Cyclization of 2-Azulenylalkynes
Shoji Taku, Sasahara Nichika, Hamasaki Atom, Mori Shigeki, Okujima Tetsuo, Sekiguchi Ryuta, Ito Shunji
The Journal of Organic Chemistry 88 ( 22 ) 15739 - 15749 2023.10
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Synthesis of Azuleno[2,1-b]quinolones and Quinolines via Brønsted Acid-Catalyzed Cyclization of 2-Arylaminoazulenes
Shoji Taku, Takeuchi Mutsumi, Uda Mayumi, Ariga Yukino, Yamazaki Akari, Sekiguchi Ryuta, Ito Shunji
Molecules 28 5785 2023.7
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Synthesis of 2‐Perfluoroalkylazuleno[2,1‐d]pyrimidin‐4(3H)‐ones via Brønsted Acid‐Mediated Intramolecular Cyclization and Transformation into Pyrimidines
Shoji Taku, Ariga Yukino, Sakata Naoko, Ando Daichi, Mori Shigeki, Okujima Tetsuo, Sekiguchi Ryuta, Ito Shunji
Advanced Synthesis & Catalysis in press 2023.7
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Synthesis of Maleimide-Fused Aceheptylenes from Guaiazulene
Shoji Taku, Uda Mayumi, Okujima Tetsuo, Sekiguchi Ryuta, Ito Shunji
Heterocycles 106 ( 4 ) 641 - 648 2023.3
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Construction of 2,2’-biazulene framework via Brønsted acid-promoted annulation of 2,3-di(1-azulenyl)benzofurans
Shoji Taku, Sakata Naoko, Ariga Yukino, Yamazaki Akari, Katoh Ryuzi, Okujima Tetsuo, Sekiguchi Ryuta, Ito Shunji
Chemical Communications 59 3447 - 3450 2023.2
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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
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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
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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
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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