Search Results - "Ito, Shunji"

Development of Heterocycle-Substituted and Fused Azulenes in the Last Decade (2010-2020) by Shoji, Taku, Okujima, Tetsuo, Ito, Shunji

“…Azulene derivatives with heterocyclic moieties in the molecule have been synthesized for applications in materials science by taking advantage of their unique…”
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Synthesis of Azulene Derivatives from 2H-Cyclohepta[b]furan-2-ones as Starting Materials: Their Reactivity and Properties by Shoji, Taku, Ito, Shunji, Yasunami, Masafumi

“…A variety of synthetic methods have been developed for azulene derivatives due to their potential applications in pharmaceuticals and organic materials…”
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Creation of Stabilized Electrochromic Materials by Taking Advantage of Azulene Skeletons by Ito, Shunji, Morita, Noboru

“…The preparative scope of the new structural principle of utilization of azulene skeletons as redox‐active chromophores for the production of stabilized…”
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Synthesis, Structural, and Optical Properties of Azuleno[1,2‑c]pyran-1-ones: Bro̷nsted Acid-Mediated Cyclization of 2‑Azulenylalkynes by Shoji, Taku, Sasahara, Nichika, Hamasaki, Atom, Mori, Shigeki, Okujima, Tetsuo, Sekiguchi, Ryuta, Ito, Shunji

“…Pyrones and their aromatic ring-fused derivatives have gained significant attention due to their diverse biological activities and potential as foundational…”
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Synthesis, Photophysical and Electrochemical Properties of 1-, 2-, and 6-(2-Benzofuryl)azulenes by Shoji, Taku, Ariga, Yukino, Yamazaki, Akari, Uda, Mayumi, Nagasawa, Takuya, Ito, Shunji

“…The synthesis of 2- and 6-(2-benzofuryl)azulenes was accomplished by the Sonogashira-Hagihara coupling reaction of the corresponding haloazulenes with…”
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Synthesis of Azuleno[2,1- b ]quinolones and Quinolines via Brønsted Acid-Catalyzed Cyclization of 2-Arylaminoazulenes by Shoji, Taku, Takeuchi, Mutsumi, Uda, Mayumi, Ariga, Yukino, Yamazaki, Akari, Sekiguchi, Ryuta, Ito, Shunji

“…Quinolone and quinoline derivatives are frequently found as substructures in pharmaceutically active compounds. In this paper, we describe a procedure for the…”
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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 by Shoji, Taku, Miura, Kota, Araki, Takanori, Maruyama, Akifumi, Ohta, Akira, Sekiguchi, Ryuta, Ito, Shunji, Okujima, Tetsuo

“…We describe the comparative study of optical and electrochemical properties of tetracyanobutadienes (TCBDs) and dicyanoquinodimethanes (DCNQs) with a…”
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Synthesis and photophysical properties of azuleno[1′,2′:4,5]pyrrolo[2,1-b]quinazoline-6,14-diones: Azulene analogs of tryptanthrin by Kogawa, Chieko, Fujiwara, Asuka, Sekiguchi, Ryuta, Shoji, Taku, Kawakami, Jun, Okazaki, Masaaki, Ito, Shunji

“…Azulene analog of tryptanthrin, azuleno[1′,2′:4,5]pyrrolo[2,1-b]quinazoline-6,14-dione, was successfully prepared by the condensation reaction of…”
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Synthesis of thiophene-fused heptalenes by cycloaddition of azulenothiophenes with dimethyl acetylenedicarboxylate by Shoji, Taku, Miura, Kota, Ariga, Yukino, Yamazaki, Akari, Ito, Shunji, Yasunami, Masafumi

“…Heptalene has a fused structure of two cycloheptatrienes which is one of the non-aromatic bicyclic molecules with a 12π-electronic structure. We report herein…”
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On the construction of the natural extension of the Hurwitz complex continued fraction map by Ei, Hiromi, Ito, Shunji, Nakada, Hitoshi, Natsui, Rie

“…We consider the Hurwitz complex continued fraction map associated to the Gaussian field Q ( i ) . We characterize the density function of the absolutely…”
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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 by Shoji, Taku, Sakata, Naoko, Sekiguchi, Ryuta, Ito, Shunji

“…The preparation of bis(3-methylthio-1-azulenyl)phenylmethyl cations and 1,4-phenylenebis[bis(3,6-di-tert-butyl-1-azulenyl)methyl] dications was accomplished by…”
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Computation of true chaotic orbits using cubic irrationals by Saito, Asaki, Ito, Shunji

“…We introduce a method that enables us to generate long true orbits of discrete-time dynamical systems defined by one-dimensional piecewise linear fractional…”
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Synthesis and Properties of 3,8-Diaryl-2H-cyclohepta[b]furan-2-ones by Shoji, Taku, Ando, Daichi, Iwabuchi, Masayuki, Okujima, Tetsuo, Sekiguchi, Ryuta, Ito, Shunji

“…Synthesis of 3,8-diaryl-2H-cyclohepta[b]furan-2-ones was accomplished by the one-pot procedure involving sequential iodation and Suzuki–Miyaura coupling…”
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Synthesis, Properties, and Redox Behavior of Tetracyanobutadiene and Dicyanoquinodimethane Chromophores Bearing Two Azulenyl Substituents by Shoji, Taku, Maruyama, Mitsuhisa, Shimomura, Erika, Maruyama, Akifumi, Ito, Shunji, Okujima, Tetsuo, Toyota, Kozo, Morita, Noboru

“…Acetylene derivatives with an azulenyl group at both terminals have been prepared by palladium-catalyzed alkynylation under Sonogashira–Hagihara conditions…”
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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 by Shoji, Taku, Maruyama, Mitsuhisa, Ito, Shunji, Morita, Noboru

“…Mono-, bis-, tris-, and tetrakis[(1-azulenylethynyl)phenylethynyl- and (1-azulenylethynyl)-2-thienylethynyl]benzenes have been prepared by Pd-catalyzed…”
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Benz[a]azulenequinones: Reaction of Benz[a]azulenes with Pyridinium Hydrobromide Perbromide by Shoji, Taku, Yamazaki, Akari, Sakata, Naoko, Sekiguchi, Ryuta, Ito, Shunji, Yasunami, Masafumi

“…A series of benz[a]azulenes reacted with pyridinium hydrobromide perbromide (PHBPB) in hydrous tetrahydrofuran yielding the corresponding…”
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Synthesis, Properties, and Redox Behavior of Tris(1-azulenyltetracyanobutadiene) and Tris[1-azulenylbis(tetracyanobutadiene)] Chromophores Connected to a 1,3,5-Tri(1-azulenyl)benzene Core by Shoji, Taku, Maruyama, Akifumi, Shimomura, Erika, Nagai, Daichi, Ito, Shunji, Okujima, Tetsuo, Toyota, Kozo

“…Tris(1‐azulenylacetylene) and tris(1‐azulenylethynylarylacetylene) chromophores connected to a 1,3,5‐tri(1‐azulenyl)benzene core have been prepared by the…”
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Azulene‐Substituted Donor‐Acceptor Polymethines and 1,6’‐Bi‐, 1,6′;3,6′′‐Ter‐, and Quinqueazulenes via Zincke Salts: Synthesis, and Structural, Optical, and Electrochemical Properties by Shoji, Taku, Yamazaki, Akari, Ariga, Yukino, Uda, Mayumi, Ando, Daichi, Sasahara, Nichika, Kai, Naohito, Ito, Shunji

“…Azulene‐substituted donor‐acceptor polymethines, bi‐, ter‐, and quinqueazulenes composed of the 1,6′‐biazulene unit have been successfully prepared from…”
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Efficient synthesis and redox behavior of a series of 6-alkyl-2-phenylazulenes by Ito, Shunji, Ueda, Mao, Sekiguchi, Ryuta, Kawakami, Jun

“…Three new members of 6-alkyl-2-phenylazulene (nPA with n being the number of carbon atoms in the 6-alkyl chain) homologous series, 3a (n=4), 3b (n=6), and 3d…”
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Photophysical Properties of the 2-Hydroxytryptanthrin and Its Sodium Salt as Near-infrared Dyes for Fluorescent Imaging by KAWAKAMI, Jun, TAKAHASHI, Masahiro, ITO, Shunji, KITAHARA, Haruo

“…2-Hydroxytryptanthrin (T2OH) and its sodium salt (sodium tryptanthrin-2-olate, T2ONa) were synthesized as near-infrared (NIR) dyes for fluorescent imaging. The…”
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