Publications in 2004~2009
(@Tohoku University)

18) Synthesis and Properties of Ferrocenylmethylene-bridged Calix[4]azulene and a New Example of Di(1-azulenyl)ferrocenylmethylium Ion, Taku Shoji,* Junya Higashi, Shunji Ito, Kozo Toyota, Takeaki Iwamoto, Noboru Morita, European Journal of Organic Chemistry 2009, 2009, 5948-5952.

17) Synthesis and Redox Behavior of 1,3-Bis(methylthio- and phenylthio)azulenes Bearing 2- and 3-Thienyl Substituents via Palladium-catalyzed Cross-coupling Reaction of 2- and 6-Haloazulenes with Thienylmagnesium Ate-complexes, Taku Shoji,* Shunji Ito, Kozo Toyota, Takeaki Iwamoto, Masafumi Yasunami, Noboru Morita, European Journal of Organic Chemistry 2009, 2009, 4316-4324.

16) Reaction of 1-Ethynylazulenes with 7,7,8,8-Tetracyanoquinodimethane (TCNQ): Preparation, Properties, and Redox Behavior of Novel Azulene-Substituted Redox-Active Chromophores, Taku Shoji,* Shunji Ito, Kozo Toyota, Takeaki Iwamoto, Masafumi Yasunami, Noboru Morita, European Journal of Organic Chemistry 2009, 2009, 4307-4315.

15) Synthesis and redox behavior of ene-diyne scaffolds that bear ferrocenes at the periphery, Taku Shoji,* Shunji Ito, Kozo Toyota, Noboru Morita, Tetrahedron Letters 2009, 50, 2825-2827.

14) Electrophilic ipso-Substitution and Some Unique Reaction Behavior of 1,3,6-Tri-tert-butylazulene, Taku Shoji,* Shunji Ito, Tetsuo Okujima, Junya Higashi, Ryuji Yokoyama, Kozo Toyota, Masafumi Yasunami, Noboru Morita, European Journal of Organic Chemistry 2009, 2009, 1554-1563.

13) Heteroarylation of 1-Azulenyl Methyl Sulfide: Two-Step Synthetic Strategy for 1-Methylthio-3-(heteroaryl)azulenes Using the Triflate of N-Containing Heterocycles, Junya Higashi, Taku Shoji,* Shunji Ito, Kozo Toyota, Masafumi Yasunami, Noboru Morita, European Journal of Organic Chemistry 2008, 2008, 5823-5831.

12) 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, Taku Shoji,* Shunji Ito, Kozo Toyota, Masafumi Yasunami, Noboru Morita, Chemistry - A European Journal 2008, 14, 8398-8408.

11) Synthesis and Intramolecular Pericyclization of 1-Azulenyl Thioketones, Shunji Ito,* Tetsuo Okujima, Shigeru Kikuchi, Taku Shoji, Noboru Morita, Toyonobu Asao, Tadaaki Ikoma, Shozo Tero-Kubota, Jun Kawakami, Akio Tajiri, Journal of Organic Chemistry 2008, 73, 2256-2263.

10) Synthesis and Reactivity of 3-Methylsulfinyl-2H-cyclohepta[b]furan-2-ones, Junya Higashi, Kazuyuki Okada, Taku Shoji, Kozo Toyota, Masataka Watanabe, Masafumi Yasunami, Shigeru Kikuchi, Shunji Ito, Noboru Morita*, Heterocycles 2008, 76, 759-770. [Special Issue of Professor Dr. Ryoji Noyori on 70th Birthday]

9) Synthesis and Redox Behaviors of 1-Azulenyl Sulfides and Efficient Synthesis of 1,1’-Biazulenes, Taku Shoji,* Junya Higashi, Shunji Ito, Kozo Toyota, Toyonobu Asao, Masafumi Yasunami, Kunihide Fujimori, Noboru Morita, European Journal of Organic Chemistry 2008, 2008, 1242-1252.

8) A Novel Approach to 5,5’-Diisopropyl-3,3’-bi-2H-cyclohepta[b]furan-2-one, Noboru Morita,* Junya Higashi, Kazuyuki Okada, Taku Shoji, Kozo Toyota, Masataka Watanabe, Masafumi Yasunami, Shigeru Kikuchi, Shunji Ito, Heterocycles 2007, 73, 237-240.

7) The novel transition metal free synthesis of 1,1′-biazulene, Taku Shoji,* Shunji Ito, Kozo Toyota, Masafumi Yasunami, Noboru Morita, Tetrahedron Letters 2007, 48, 4999-5002.

6) Synthesis of 5-heteroarylazulenes: first selective electrophilic substitution at the 5-position of azulene, Taku Shoji,* Shunji Ito, Masataka Watanabe, Kozo Toyota, Masafumi Yasunami, Noboru Morita, Tetrahedron Letters 2007, 48, 3009-3012.

5) Synthesis of heteroarylazulenes: transition metal free coupling strategy of azulene with heterocycles, Taku Shoji,* Ryuji Yokoyama, Shunji Ito, Masataka Watanabe, Kozo Toyota, Masafumi Yasunami, Noboru Morita, Tetrahedron Letters 2007, 48, 1099-1103.

4) Synthesis, Stabilities, and Redox Behavior of Mono-, Di-, and Tetracations Composed of Di(1-azulenyl)methylium UnitsConnected to a Benzene Ring by Phenyl- and 2-Thienylacetylene Spacers. A Concept of a Cyanine-Cyanine Hybrid as a Stabilized Electrochromic System, Shunji Ito,* Koji Akimoto, Jun Kawakami, Akio Tajiri, Taku Shoji, Hiroyuki Satake, Noboru Morita,  Journal of Organic Chemistry 2007, 72, 162-172.

3) Reaction of 2H-Cyclohepta[b]furan-2-ones with Pyridinium Salts of Trifluoromethanesulfonic Anhydride, Noboru Morita,* Tomohiro Matsuki, Masashi Nakashima, Taku Shoji, Kozo Toyota, Shigeru Kikuchi, Shunji Ito, Heterocycles 2006, 69, 119-122. [Special Issue of Professor Dr. Satoshi Omura on 70th Birthday]

2) The Synthesis of Heteroarylazulene, Taku Shoji, Shigeru Kikuchi, Shunji Ito, Noboru Morita*, Heterocycles 2005, 65, 91-94.

1) Synthesis of Azulen-3-ylheterocyclic Using 2-(1-Methoxycarbonylazulen-3-yl)ethynyltriphenylphosphonium Bromide, Noboru Morita,* Shiro Moriyama, Taku Shoji, Masashi Nakashima, Masataka Watanabe, Shigeru Kikuchi, Shunji Ito, Kunihide Fujimori, Heterocycles 2004, 64, 305-316.