Publications in 2010~2022
(@Shinshu University)

82) Sensitive screening of methamphetamine stimulant using potential-modulated electrochemiluminescence, Fumiki Takahashi,* Saki Nitta, Ryo Shimizu, Taku Shoji, Hirosuke Tatsumi, Jiye Jin, Analytica Chimica Acta, 2021, in press.

81) Synthesis of Azulene Derivatives from 2H-Cyclohepta[b]furan-2-ones as Starting Materials: Their Reactivity and Properties, Taku Shoji,* Shunji Ito, and Masafumi Yasunami, International Journal of Molecular Science, 2021, 22, 10686.

80) Azuleno[6,5-b]Indoles: Palladium-Catalyzed Oxidative Ring-Closing Reaction of 6-(Arylamino)Azulenes, Taku Shoji,* Yukino Ariga, Shunji Ito, and Masafumi Yasunami, Heterocycles, 2021, in press. [Professor Somsak Ruchirawat on 80th Birthday]

79) 水溶性アズレン類の液液界面イオン移動ボルタンメトリー (Ion transfer voltammetry of azulene sulfonates at liquid|liquid interface), 矢島　敏司, 庄子　卓, 巽　広輔, 分析化学, 2021, 529-533.

78) 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, Taku Shoji,* Akari Yamazaki, Yukino Ariga, Mayumi Uda, Daichi Ando, Nichika Sasahara, Naohito Kai and Shunji Ito, ChemPlusChem, 2021, 86, 946-966.

77) Synthesis, Photophysical and Electrochemical Properties of 1-, 2-, and 6-(2-Benzofuryl)azulenes, Taku Shoji,* Yukino Ariga, Akari Yamazaki, Mayumi Uda, Takuya Nagasawa, and Shunji Ito, Bulletin of the Chemical Society of Japan, 2021, 94, 1000-1009.

76) Development of Heterocycle-Substituted and Fused Azulenes in the Last Decade (2010−2020), Taku Shoji,* Tetsuo Okujima, and Shunji Ito, International Journal of Molecular Science, 2020, 21, 7087.

75) Synthesis of Thiophene-fused Heptalenes by Cycloaddition of Azulenothiophenes with Dimethyl Acetylenedicarboxylate, Taku Shoji,* Kota Miura, Yukino Ariga, Akari Yamazaki, Shunji Ito, and Masafumi Yasunami, Scientific Reports, 2020, 10, 12477.

74) Synthesis of phthalimides cross‐conjugated with azulene ring, and their structural, optical and electrochemical properties, Taku Shoji,* Nanami Iida, Akari Yamazaki, Yukino Ariga, Akira Ohta, Ryuta Sekiguchi, Tatsuki Nagahata, Takuya Nagasawa, Shunji Ito, Organic & Biomolecular Chemistry, 2020, 18, 2274-2282.

73) Direct synthesis of 2-arylazulenes by [8 + 2] cycloaddition of 2H-cyclohepta[b]furan-2-ones with silyl enol ethers, Taku Shoji,* Shuhei Sugiyama, Yoshiaki Kobayashi, Akari Yamazaki, Yukino Ariga, Ryuzi Katoh, Hiroki Wakui, Masafumi Yasunami* and Shunji Ito, Chemical Communications, 2020, 56, 1485-1488. [Selected as a Inside Front Cover Picture]

72) Molecular Transformation to Pyrroles, Pentafulvenes, and Pyrrolopyridines via [2 + 2] Cycloaddition of Propargylamines with Tetracyanoethylene, Taku Shoji,* Sho Takagaki, Yukino Ariga, Akari Yamazaki, Mutsumi Takeuchi, Akira Ohta, Ryuta Sekiguchi, Shigeki Mori, Tetsuo Okujima an Shunji Ito, Chemistry - A European Journal, 2019, 26, 1931-1935. [Selected as a Very Important Paper (VIP)]

71) Synthesis of azuleno[2,1-b]thiophenes by cycloaddition of azulenylalkynes with elemental sulfur and their structural, optical and electrochemical properties, Taku Shoji,* Kota Miura, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, Yuya Endo, Tatsuki Nagahata, Shigeki Mori and Tetsuo Okujima, Organic Chemistry Frontiers, 2019, 6, 2801-2811.

70) Synthesis of 6-Amino- and 6-Arylazoazulenes via Nucleophilic Aromatic Substitution and Their Reactivity and Properties, Taku Shoji,* Shuhei Sugiyama, Mutsumi Takeuchi, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, Tomoaki Yatsu, Tetsuo Okujima, and Masafumi Yasunami, Journal of Organic Chemistry, 2019, 84, 1257-1275.

69) Synthesis of azulenophthalimides by phosphine-mediated annulation of 1,2-diformylazulenes with maleimides, Taku Shoji,* Takanori Araki, Nanami Iida, Kota Miura, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, and Tetsuo Okujima, Organic Chemistry Frontiers, 2019, 6, 195-204.

68) Synthesis and photophysical properties of azuleno[1′,2′:4,5]pyrrolo[2,1-b]quinazoline-6,14-diones: Azulene analogs of tryptanthrin, Chieko Kogawa, Asuka Fujiwara, Ryuta Sekiguchi, Taku Shoji, Jun Kawakami, Masaaki Okazaki, Shunji Ito*, Tetrahedron, 2018, 74, 7018-7029.

67) 2,2’-Biazulene diimide-based conjugate polymers for high-performance field-effect transistors, Taku Shoji,* and Shunji Ito, SCIENCE CHINA Chemistry, 2018, 61, 973-974.

66) Synthesis of 2-Methyl-1-azulenyl Tetracyanobutadienes and Dicyanoquinodimethanes: Substituent Effect of 2-Methyl Moiety on Azulene Ring toward the Optical and Electrochemical Properties, Taku Shoji,* Kota Miura, Takanori Araki, Akifumi Maruyama, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, and Tetsuo Okujima, Journal of Organic Chemistry, 2018, 83, 6690-6705.

65) Synthesis of 2-Amino-1-Cyanoazulenes: Substituent Effect on 2H-Cyclohepta[b]Furan-2-Ones Toward the Reaction with Malononitrile, Taku Shoji,* Shuhei Sugiyama, Kota Miura, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, Shigeki Mori, and Tetsuo Okujima, Heterocycles, 2018, 97, 1068-1081. [Special Issue of Professor Kiyoshi Tomioka on 70th Birthday]

64) The preparation and properties of heteroarylazulenes and hetero-fused azulenes, Taku Shoji,* and Shunji Ito*, Advances in Heterocyclic Chemistry, 2018, 126, Chapter 1-1-54.

63) Molecular Transformation of 2-Methylazulenes: An Efficient and Practical Synthesis of 2-Formyl- and 2-Ethynylazulenes, Taku Shoji,* Takanori Araki, Nanami Iida, Yoshiaki Kobayashi, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, Shigeki Mori, Tetsuo Okujima, and Masafumi Yasunami, European Journal of Organic Chemistry, 2018, 2018, 1145-1157. [Selected as a Very Important Paper (VIP)]

62) 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, Shunji Ito,* Ryuta Sekiguchi, Akira Mizushima, Kohei Kudo, Jun Kawakami, and Taku Shoji, Archive for Organic Chemistry, 2018, part ii, 145-169.

61) Synthesis of Azulene-substituted Benzofurans and Isocoumarins via Intramolecular Cyclization of 1-Ethynylazulenes, and their Structural and Optical Properties, Taku Shoji,* Miwa Tanaka, Sho Takagaki, Kota Miura, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, Shigeki Mori, and Tetsuo Okujima, Organic & Biomolecular Chemistry, 2018, 16, 480-489.

60) Azulene-based Donor-Acceptor Systems: Synthesis, Optical and Electrochemical Properties, Taku Shoji,* and Shunji Ito*, Chemistry - A European Journal, 2017, 23, 16696-16709.

59) Synthesis of Azulene-Substituted TetraarylPyrroles by Reaction of 1-Azulenyl Ketones with Benzoin and Ammonium Acetate, Taku Shoji,* Sho Takagaki, Miwa Tanaka, Takanori Araki, Shuhei Sugiyama, Ryuta Sekiguchi, Akira Ohta, Shunji Ito, and Tetsuo Okujima, Heterocycles, 2017, 94, 1870-1883.

58) Synthesis of 2-amino- and 2-arylazoazulenes via nucleophilic aromatic substitution of 2-chloroazulenes with amines and arylhydrazines, Taku Shoji,* Shuhei Sugiyama, Takanori Araki, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, Shigeki Mori, Tetsuo Okujima, and Masafumi Yasunami, Organic& Biomolecular Chemistry, 2017, 15, 3917-3923.

57) 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, Taku Shoji,* Daichi Nagai, Miwa Tanaka, Takanori Araki, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, Shigeki Mori, and Tetsuo Okujima, Chemistry - A European Journal, 2017, 23, 5126-5136 [Selected as a Very Important Paper (VIP)].

56) Synthesis of 2-Azulenyltetrathiafulvalenes by Palladium-catalyzed Direct Arylation of 2-Chloroazulenes with Tetrathiafulvalene and Their Optical and Electrochemical Properties, Taku Shoji,* Takanori Araki, Shuhei Sugiyama, Akira Ohta, Ryuta Sekiguchi, Shunji Ito, Tetsuo Okujima, and Kozo Toyota, The Journal of Organic Chemistry, 2017, 82, 1657-1665.

55) Synthesis and Electrochemical Properties of Azulene-Substituted Tetracyanobutadiene and Dicyanoquinodimethane Chromophores Connected with Naphthalene Cores, Taku Shoji,* Mitsuhisa Maruyama, Akifumi Maruyama, Daichi Nagai, Miwa, Tanaka, Ryuta Sekiguchi, Shunji Ito, Tetsuo Okujima, Heterocycles, 2017, 95, 353-369 [Special Issue of Professor Dr. Masakatsu Shibasaki on 70th Birthday].

54) Synthesis of 1-Azulenyl Ketones by Brønsted Acid Mediated Hydration of 1-Azulenylalkynes, Taku Shoji,* Miwa Tanaka, Takanori Araki, Sho Takagaki, Ryuta Sekiguchi and Shunji Ito, RSC Advances, 2016, 6, 78303-78306.

53) Synthesis of 1,2′-Biazulenes by Palladium-Catalyzed Unusual Homocoupling Reaction of 1-Haloazulenes in the Presence of Ferrocene, Taku Shoji,* Kanami Miyashita, Takanori Araki, Miwa Tanaka, Akifumi Maruyama, Ryuta Sekiguchi, Shunji Ito, Tetsuo Okujima, Synthesis-Stuttgart, 2016, 48, 2438-2448.

52) Synthesis and Properties of (3-Phenyl-1-azulenyl)tetracyanobetadienes and Tris(aryltetracyanobetadiene)s Connected with 1,3,5-Tri(1-azulenyl)benzene Core, Taku Shoji,* Akifumi Maruyama, Miwa Tanaka, Daichi Nagai, Erika Shimomura, Kunihide Fujimori, Shunji Ito, Tetsuo Okujima, Kozo Toyota, Masafumi Yasunami, ChemistrySelect, 2016, 1, 49-56.

51) Synthesis of 2- and 6-thienylazulenes by palladium-catalyzed direct arylation of 2- and 6-haloazulenes with thiophene derivatives, Taku Shoji,* Akifumi Maruyama, Takanori Araki, Shunji Ito and Tetsuo Okujima, Organic & Biomolecular Chemistry, 2015, 13, 10191-10197.

50) Synthesis, Properties and Redox Behavior of Ferrocenyl-1,1,4,4-tetracyano-1,3-butadienes Connected by Arylamine and Azobenzene Spacers, Taku Shoji,* Natsumi Kamata, Akifumi Maruyama, Shunji Ito, and Tetsuo Okujima, Bulletin of the Chemical Society of Japan, 2015, 88, 1338-1346.

49) Synthesis, Properties and Redox Behavior of Tris[1-azulenyltetracyanobetadiene and 1-azulenylbis(tetracyanobetadiene)s] Connected with 1,3,5-Tri(1-azulenyl)benzene Core, Taku Shoji,* Akifumi Maruyama, Erika Shimomura, Daichi Nagai, Shunji Ito, Tetsuo Okujima, and Kozo Toyota, European Journal of Organic Chemistry, 2015, 2015, 1979-1990.

48) Synthesis of 2,6-Diaminoazulenes by the SNAr Reaction with Cyclic Amines, Taku Shoji,* Yuki Fujiwara, Akifumi Maruyama, Mitsuhisa Maruyama, Shunji Ito, Masafumi Yasunami, Ryuji Yokoyama, Noboru Morita, Heterocycles, 2015, 90, 85-88 [Special Issue of Professor Isao Kuwajima on 77th Birthday].

47) Synthesis, Properties and Redox Behavior of 1,1,4,4-Tetracyano-2-ferrocenyl-1,3-butadienes Connected by Aryl, Biaryl and Teraryl Spacers, Taku Shoji,* Akifumi Maruyama, Chisa Yaku, Natsumi Kamata, Shunji Ito, Tetsuo Okujima and Kozo Toyota, Chemistry - A European Journal, 2015, 21, 402-409.

46) Synthesis of 2-Aryl- and 6-Heteroaryl-1,3-di(4-pyridyl)azulenes by Katritzky’s Pyridylation of 2-Aryl- and 6-Heteroarylazulenes, Taku Shoji,* Akifumi Maruyama, Shunji Ito, Tetsuo Okujima, Masafumi Yasunami, Junya Higashi, and Noboru Morita, Heterocycles, 2014, 89, 2588-2603.

45) 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, Taku Shoji,* Mitsuhisa Maruyama, Akifumi Maruyama, Shunji Ito, Tetsuo Okujima, Kozo Toyota, Chemistry - A European Journal, 2014, 20, 11903-11912.

44) Synthesis of 2,2’-Diamino-1,1’-biazulenes by the Copper-Catalyzed Homo-Coupling Reaction of 2-Aminoazulenes, Taku Shoji,* Akifumi Maruyama, Atsuyo Yamamoto, Yuki Fujiwara, Shunji Ito, Tetsuo Okujima, Noboru Morita, Chemistry Letters, 2014, 43, 1122-1124.

43) 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, Taku Shoji,*, Akifumi Maruyama, Mitsuhisa Maruyama, Shunji Ito, Tetsuo Okujima, Junya Higashi, Kozo Toyota, Noboru Morita, Bulletin of the Chemical Society of Japan, 2014, 87, 141-154.

42) Synthesis, Properties, and Crystal Structure of DDQ-Adducts of Ethynylated 2H-Cyclohepta[b]furan-2-ones, Taku Shoji,* Mitsuhisa Maruyama, Erika Shimomura, Akifumi Maruyama, Shunji Ito, Masafumi Yasunami, Junya Higashi, Kozo Toyota, and Noboru Morita*, Heterocycles, 2014, 88, 319-329 [Special Issue of Professor Dr. Victor Snieckus on 77th Birthday].

41) Synthesis, Properties and Redox Behavior of Tetracyanobutadiene and Dicyanoquinodimethane Chromophores Bearing Two Azulenyl Substituents, Taku Shoji,* Mitsuhisa Maruyama, Erika Shimomura, Akifumi Maruyama, Shunji Ito, Tetsuo Okujima, Kozo Toyota, Noboru Morita, The Journal of Organic Chemistry, 2013, 78, 12513-12524.

40) Synthesis and Properties of Azulene-substituted Donor-Acceptor Chromophores Connected by Arylamine Cores, Taku Shoji,* Erika Shimomura, Mitsuhisa Maruyama, Akifumi Maruyama, Shunji Ito, Tetsuo Okujima, Kozo Toyota, Noboru Morita, European Journal of Organic Chemistry, 2013, 2013, 7785-7799.

39) Synthesis of 1,6’-Bi- and 1,6’:3,6’’-Terazulenes from 1-Pyridyl- and 1,3-Di(pyridyl)azulenes by the Zieglar–Hafner Method
Chemistry Letters,2013(42):638-640
Author:Taku Shoji,* Atsuyo Yamamoto, Erika Shimomura, Mitsuhisa Maruyama, Shunji Ito, Tetsuo Okujima, Kozo Toyota and Noboru Morita

38) Synthesis of Novel Thiophene-fused 1,1’-Biazulene Derivative by the Reaction of Azuleno[1,2-b]thiophene with N-Iodosuccinimide
Heterocycles,2013(87):303-306
Author:Taku Shoji,* Erika Shimomura, Yuta Inoue, Mitsuhisa Maruyama, Atsuyo Yamamoto, Kunihide Fujimori, Shunji Ito, Masafumi Yasunami, Noboru Morita

37) Synthesis of 2-Azulenyl-1,1,4,4-tetracyano-3-ferrocenyl-1,3-butadienes by the [2+2] Cycloaddition of (Ferrocenylethynyl)azulenes with Tetracyanoethylene
Chemistry - A European Journal,2013(19):5721-5730
Author:Taku Shoji,* Shunji Ito, Tetsuo Okujima, Noboru Morita

36) Synthesis, Properties and Redox Behavior of Ene-Diyne Scaffolds Bearing 1- and 2-Azulenyl groups at the Periphery
European Journal of Organic Chemistry,2013(2013):957-964
Author:Taku Shoji,* Erika Shimomura, Mitsuhisa Maruyama, Shunji Ito, Tetsuo Okujima, Noboru Morita

35) Synthesis and Solvatochromic Properties of Azulene-substituted Donor–Acceptor-type Polymethine Dyes, Taku Shoji,* Atsuyo Yamamoto, Yuta Inoue, Erika Shimomura, Shunji Ito, Junya Higashi, and Noboru Morita, Chemistry Letters, 2012, 41, 1644-1646.

34) Synthesis of push-pull chromophores by the sequential [2 + 2] cycloaddition of 1-azulenylbutadiynes with tetracyanoethylene and tetrathiafulvalene, Taku Shoji,* Shunji Ito, Tetsuo Okujima, Noboru Morita, Organic & Biomolecular Chemistry, 2012, 10, 8308-8313.

33) Synthesis and Redox Behavior of Cyanovinyl–substituted 2H-Cyclohepta[b]furan-2-ones, Taku Shoji,* Junya Higashi, Shunji Ito, Mitsunori Oda, Masafumi Yasunami, Noboru Morita, Heterocycles, 2012, 86, 305-315 [Special Issue of Professor Dr. Ei-ichi Negishi on 77th Birthday]

32) Facile Synthesis of 2,3-Disubstituted Pyrroles from 2-Substituted 1-Pyrrolines, Yurie Fujiwara, Mitsunori Oda,* Taku Shoji, Takako Abe, Shigeyasu Kuroda, Heterocycles, 2012, 85, 1187-1195.

31) 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, Taku Shoji,* Mitsuhisa Maruyama, Shunji Ito, Noboru Morita, Bulletin of the Chemical Society of Japan, 2012, 85, 761-773. (Selected Paper of BCSJ, 2012, issue 7)

30) First synthesis of 1-(indol-2-yl)azulenes by the Vilsmeier-Haack type arylation with triflic anhydride as an activating reagent, Taku Shoji,* Yuta Inoue, Shunji Ito, Tetrahedron Letters, 2012, 53, 1493-1496.

29) Synthesis of donor–acceptor chromophores by the [2+2] cycloaddition of arylethynyl-2H-cyclohepta[b]furan-2-ones with 7,7,8,8-tetracyanoquinodimethane, Taku Shoji,* Junya Higashi, Shunji Ito, Tetsuo Okujima, Masafumi Yasunami, Noboru Morita, Organic & Biomolecular Chemistry, 2012, 10, 2431-2438.

28) First Synthesis of 2-Heteroarylazulenes by the Electrophilic Substitution of Azulene with Triflate of N-Containing Heterocycles, Taku Shoji,* Yuta Inoue, Shunji Ito, Tetsuo Okujima, Noboru Morita, Heterocycles, 2012, 85, 35-41.

27) Recent Advances in the Development of Methods for the Preparation of Functionalized Azulenes for Electrochromic Applications, Shunji Ito,* Taku Shoji,* Noboru Morita, Synlett, 2011, 16, 2279-2298.

26) The [2+2] Cycloaddition Reaction of Ethynylated 2H-Cyclohepta[b]furan-2-ones with 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone, Taku Shoji,* Junya Higashi, Shunji Ito, Masafumi Yasunami, and Noboru Morita, Heterocycles, 2011, 83, 2271-2274.

25) Synthesis of 1-Heteroaryl- and 1,3-Bis(heteroaryl)azulenes: Electrophilic Heteroarylation of Azulenes with the Triflate of N-Containing Heteroarenes, Taku Shoji,* Shunji Ito, Jyunya Higashi, Noboru Morita, European Journal of Organic Chemistry, 2011, 2011, 5311-5322.

24) Synthesis and [2+2] Cycloaddition with Tetracyanoethylene of Ene-Diyne Scaffolds Bearing Ferrocenes at the Periphery, Taku Shoji,* Shunji Ito, Tetsuo Okujima, Noboru Morita, European Journal of Organic Chemistry, 2011, 2011, 5134-5140.

23) Synthesis of Redox-Active, Intramolecular Charge-Transfer Chromophores by the [2+2]Cycloaddition of Ethynylated 2H-Cyclohepta[b]furan-2-ones with Tetracyanoethylene, Taku Shoji,* Junya Higashi, Shunji Ito, Tetsuo Okujima, Masafumi Yasunami, Noboru Morita, Chemistry - A European Journal, 2011, 17, 5116-5129.

22) Synthesis and Redox Behavior of Bis(3-methylthio-1-azulenyl)methyl Cations and Dications Connected by 2-Thienyl and 2,5-Thiophenediyl Spacers, Taku Shoji,* Junya Higashi, Shunji Ito, Tetsuo Okujima, Noboru Morita, European Journal of Organic Chemistry, 2011, 2011, 584-592.

21) Synthesis, Properties, and Redox Behavior of Ferrocene-substituted Bis(3-methylthio-1-azulenyl)methylium Ions, Taku Shoji,* Junya Higashi, Shunji Ito, Noboru Morita, European Journal of Inorganic Chemistry, 2010, 2010, 4886-4891.

20) Synthesis of 1-(pyridyl, quinolyl, and isoquinolyl)azulenes by Reissert-Henze type reaction, Taku Shoji,* Kazuyuki Okada, Shunji Ito, Kozo Toyota, Noboru Morita, Tetrahedron Letters, 2010, 51, 5127-5130.

19) 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, Taku Shoji,* Shunji Ito, Kozo Toyota, Noboru Morita, European Journal of Organic Chemistry, 2010, 2010, 1059-1069.