Publications

Original Papers

<2024>

36. Lithium Salt of 2,5-Bis(trimethylsilyl)stannolyl Anion: Synthesis, Structure, and Nonaromatic Character

Kohei Kitamura, Youichi Ishii, Takuya Kuwabara

Inorganics 2024, 12, 92.

DOI: 10.3390/inorganics12030092

<2023>

35. Retro-Vinylidene Rearrangements of P- and S-Substituted Ruthenium Vinylidene Complexes
Takahiro Iwamoto, Kyoka Saito, Takuya Mitsubo, Takuya Kuwabara, Youichi Ishii
Organometallics 2023, 42, 167–173.
DOI: 10.1021/acs.organomet.2c00552

34. Exo- and endo-Isomers of Plumbylenes Supported by 1,3-Diethers of Calix[4]arene

Ryunosuke Kuriki, Youichi Ishii, Takuya Kuwabara*

Eur. J. Inorg. Chem. 202326, e202200655.

Selected as EurJIC Talents

DOI: 10.1002/ejic.202200655

<2022>

33. Inorganic salt-assisted assembly of anionic π-conjugated rings enabling 7Li NMR-based evaluation of antiaromaticity

Shotaro Ito, Youichi Ishii, Takuya Kuwabara*

Dalton Trans. 2022, 51, 16397–16402.

DOI: 10.1039/D2DT02649J

32. Perfluorocycloparaphenylenes

Hiroki Shudo, Motonobu Kuwayama, Masafumi Shimasaki, Taishi Nishihara, Youhei Takeda, Takuya Kuwabara, Akiko Yagi, Yasutomo Segawa,* Kenichiro Itami*

Nat. Commun. 2022, 13, 3713.

DOI: 10.1038/s41467-022-31530-x

PrePrint version: DOI: 10.33774/chemrxiv-2021-7kd63

31. Weakly Bound Dimer of a Diaryloxygermylene Derived from a
tBuPh2Si-Substituted 2,2′-Methylenediphenol

Ryo Yamazaki, Ryunosuke Kuriki, Asuka Sugihara, Youichi Ishii and Takuya Kuwabara*

Crystals 2022, 12, 605.

DOI: 10.3390/cryst12050605

30. Experimental Observation of β-Carbon Elimination from Alkenylrhodium Complexes through Exchange Reactions of the Alkenyl Unit

Takahiro Iwamoto, Koushi Shibuya, Tomoyuki Takakuwa, Takuya Kuwabara, Youichi Ishii*

Organometallics 2022, 41, 182–186.

DOI: 10.1021/acs.organomet.1c00695

<2021>

29. A new strategy for hyperconjugative antiaromatic compounds utilizing negative charges: a dibenzo[b,f]silepinyl dianion

Shotaro Ito, Youichi Ishii, Kazuya Ishimura, Takuya Kuwabara*

Chem. Commun. 2021, 57, 11330–11333.

DOI: 10.1039/D1CC04434F

<2020>

28. Selective Double CH Activation at a Methylene Carbon in Methylenediphenol Derivatives to Generate Carbene-Bridged Dinuclear Iridium Complexes

Takuya Kuwabara, Takuya Toriumi, Mika Suzuki, and Youichi Ishii*

Organometallics 2020, 39, 4500–4509.

DOI:10.1021/acs.organomet.0c00595

Selected as the cover picture of issue 24.

27. Synthesis and Structures of Diaryloxystannylenes and -plumbylenes embedded in 1,3-Diethers of Thiacalix[4]arene

Ryunosuke Kuriki, Takuya Kuwabara,* and Youichi Ishii*

Dalton Trans. 2020, 49, 12234–12241.

DOI:10.1039/D0DT02496A

26. A Tin Analogue of the Cycloheptatrienyl Anion: Synthesis, Structure, and Further Reduction to Form a Dianionic Species

Shotaro Ito, Takuya Kuwabara,* and Youichi Ishii*

Organometallics 2020, 39, 640–644.

DOI:10.1021/acs.organomet.0c00042

25. Ruthenium Vinylidene Complexes Generated by Selective 1,2-Migration of P- and S- Substituents: Synthesis, Structures, and Dichromism Arising from an Intermolecular CH…O Hydrogen Bond

Takuya Kuwabara, Yutaka Aoki, Kousuke Sakajiri, Kazuki Deguchi, ShuheiTakamori, Ai Hamano, Keiko Takano, Hirohiko Houjou and Youichi Ishii*

Organometallics 2020, 39, 711–718.

DOI:10.1021/acs.organomet.9b00856

<2019>

24. Inverted Sandwich Rh Complex Bearing a Plumbole Ligand and Its Catalytic Activity

Masaichi Saito, Marisa Nakada, Takuya Kuwabara, Ryota Owada, Shunsuke Furukawa, Radhika Narayanan, Ninori Abe, Masahiko Hada, Ken Tanaka, Yoshihiko Yamamoto

Organometallics 2019, 38, 3099–3103.

DOI:10.1021/acs.organomet.9b00339

23. Synthesis of Phosphaphenalenium Salts via P–C Reductive Elimination at a Ru(II) Center and Their Fluorescence Properties

Takahiro Kato, Takuya Kuwabara, Yasunori Minami, Tamejiro Hiyama, and Youichi Ishii*

Bull. Chem. Soc. Jpn. 2019, 92, 1131–1141.

DOI:10.1246/bcsj.20190090

22. Molybdenum-Mediated Vinylidene Rearrangement of Internal Acylalkynes and Sulfonylalkynes

Takuya Kuwabara, Kousuke Sakajiri, Yousuke Oyama, Shintaro Kodama , and Youichi Ishii*

Organometallics 2019, 38, 1560–1566.

DOI:10.1021/acs.organomet.9b00019

<2018>

21. Ring Slippage and Dissociation of Pentamethylcyclopentadienyl Ligand in an (η5-Cp*)Ir Complex with a κ3O,C,O Tridentate Calix[4]arene Ligand under Mild Conditions

Takuya Kuwabara, Ryogen Tezuka, Mikiya Ishikawa, Takuya Yamazaki, Shintaro Kodama and Youichi Ishii*

Organometallics 2018, 37, 1829–1832.

DOI:10.1021/acs.organomet.8b00257

20. Dinuclear Nickel Complexes Doubly Bridged by Hydrogencyanamido Ligands: Synthesis, Structures and Magnetic Properties

Takuya Kuwabara, Natsumi Shiga, Shintaro Kodama, Hirohiko Sato, Hirohiko Houjou and Youichi Ishii*

Eur. J. Inorg. Chem. 2018, 3413–3417.

DOI:10.1002/ejic.201800457

19. P–C reductive elimination in Ru(II) complexes to convert triarylphosphine ligands into five- or six-membered phosphacycles

Takuya Kuwabara, Takahiro Kato, Kouichi Takano, Shintaro Kodama, Yuuka Manabe, Noriko Tsuchida, Keiko Takano, Yasunori Minami, Tamejiro Hiyama and Youichi Ishii*

Chem. Commun. 2018, 54, 5357–5360.

DOI:10.1039/C8CC02539H

18. Activation of a Carbon-Carbon Bond in Internal Alkynes: Vinylidene Rearrangement of Disubstituted Alkynes at an Ir Complex

Takuya Kuwabara, Shuhei Takamori, Satoshi Kishi, Takahiro Watanabe, Yousuke Ikeda, Shintaro Kodama, Yasunori Minami, Tamejiro Hiyama, Youichi Ishii*

Synlett 2018, 29, 727–730.

DOI:10.1055/s-0036-1591511

<2017>

17. Reactions of Dilithium Dibenzopentalenides with Cr(CO)3(CH3CN)3: Unexpected Formation of A Cubic Tetramer of An Anionic Hydrodibenzopentalenyl Complex

Takuya Kuwabara, Nobuaki Kurokawa, Masaichi Saito*

ChemPlusChem 2017, 82, 1039–1042.

DOI:org/10.1002/cplu.201700043

16. Synthesis and reactivity of a ruthenocene-type complex bearing an aromatic π-ligand with the heaviest group 14 element

Marisa Nakada, Takuya Kuwabara, Shunsuke Furukawa, Masahiko Hada, Mao Minoura, Masaichi Saito

Chem. Sci. 2017, 8, 3092–3097.

DOI:10.1039/C6SC04843A

<2016>

15. (η4-Butadiene)Sn(0) Complexes: A New Approach for Zero-valent p-Block Elements Utilizing a Butadiene as a 4π-Electron Donor

Takuya Kuwabara, Marisa Nakada, Jumpei Hamada, Jing-dong Guo, Shigeru Nagase, Masaichi Saito

J. Am. Chem. Soc. 2016, 138, 11378–11382.

DOI:10.1021/jacs.6b07304

Highlighted in Chemistry Views、埼玉大学プレスリリース

<2015>

14. Synthesis of a Stannole Dianion Complex Bearing a μ-η11-Coordination Mode: Different Electronic State of Stannole Dianion Ligands Depending on Their Hapticity

Takuya Kuwabara, Masaichi Saito

Organometallics 2015, 34, 4202–4204.

DOI:10.1021/acs.organomet.5b00614

13. Diverse Coordination Modes in Tin Analogues of Cyclopentadienyl Anion Depending on the Substituents on the Tin Atom

Takuya Kuwabara, Marisa Nakada, Jing-Dong Guo, Shigeru Nagase, Masaichi Saito

Dalton Trans. 2015, 44, 16266–16271.

DOI:10.1039/C5DT02202A

Selected as the front inside cover、Highlighted in A News Paper (日刊工業新聞)、
Chem-Station 第 4 回スポットライトリサーチ、埼玉大学プレスリリース

12. Curved Oligophenylenes as Donors in Shape-Persistent Donor-Acceptor Macrocycles with Solvatofluorochromic Properties

Takuya Kuwabara, Jun Orii, Yasutomo Segawa, Kenichiro Itami

Angew. Chem. Int. Ed. 2015, 54, 9646–9649.

DOI:10.1002/anie.201503397

Highlighted in ACS Central Science (DOI: 10.1021/acscentsci.5b00339)

11. Palladium-free Synthesis of [10]Cycloparaphenylene

Yasutomo Segawa, Takuya Kuwabara, Katsuma Matsui, Satoru Kawai, Kenichiro Itami

Tetrahedron 2015, 26–27, 4500–4503.

DOI:10.1016/j.tet.2015.02.066

10. A Reversible Two-electron Redox System Involving a Divalent Lead Species

Masaichi Saito, Marisa Nakada, Takuya Kuwabara, Mao Minoura

Chem. Commun. 2015, 51, 4674–4676.

DOI:10.1039/C4CC09856K

<2014>

9. Synthesis, Structures and Electronic Properties of Triple- and Double-Decker Ruthenocenes Incorporated by A Metallole Dianion Ligand

Takuya Kuwabara, Jing-Dong Guo, Shigeru Nagase, Takahiro Sasamori, Norihiro Tokitoh, Masaichi Saito

J. Am. Chem. Soc. 2014, 136, 13059–13064.

DOI:10.1021/ja507330p

埼玉大学プレスリリース

8. Enhancement of Stannylene Character in Stannole Dianion Equivalents Evidenced by NMR, Mössbauer Spectroscopies and Theoretical Studies of Newly Synthesized Silyl-substituted Dilithiostannoles

Takuya Kuwabara, Jing-Dong Guo, Shigeru Nagase, Mao Minoura, Rolfe H. Herber, Masaichi Saito

Organometallics 2014, 33, 2910–2913.

DOI:10.1021/om5003717

7. Facile Synthesis of Dibenzopentalene Dianions and Their Application as New π- extended Ligands

Takuya Kuwabara, Kazuya Ishimura, Takahiro Sasamori, Norihiro Tokitoh, Masaichi Saito

Chem. Eur. J. 2014, 20, 7571–7575.

DOI:10.1002/chem.201402304

6. Diversity of the Structures in a Distannene Complex and its Reduction to Generate Six-membered Ti2Sn4 Ring Complex

Takuya Kuwabara, Jing-Dong Guo, Shigeru Nagase, Masaichi Saito

Angew. Chem. Int. Ed. 2014, 53, 434–438.

DOI:10.1002/anie.201308565

<2013>

6. Unexpected Formation of Ru2Sn2 Bicyclic Four-Membered Ring Complexes with Butterfly and Inverse-Sandwich Structures

Takuya Kuwabara, Masaichi Saito, Jing-Dong Guo, Shigeru Nagase

Inorg. Chem. 2013, 52, 3585–3587.

DOI:10.1021/ic302782n

<2011>

4. Synthesis of a Novel Lithocene that has Aromatic-like Nature with Non-aromatic Rings

Masaichi Saito, Takuya Kuwabara, Kazuya Ishimura, Shigeru Nagase

Chem. Asian. J. 2011, 6, 2907–2910.

DOI:10.1002/asia.201100619

3. 1,1′-Di-tert-butyl-2,2′,3,3′,4,4′,5,5′-octaethyl-1,1′-bistannole

Takuya Kuwabara, Masaichi Saito

Acta Cryst. 2011, E67, m949.

DOI10.1107/S1600536811022951

<2010>

2. Synthesis, Structure and Reaction of Tetraethyldilithiostannole

Masaichi Saito, Takuya Kuwabara, Chika Kambayashi, Michikazu Yoshioka, Kazuya Ishimura, Shigeru Nagase

Chem. Lett. 2010, 39, 700–701.

DOI: 10.1246/cl.2010.700

Selected as Editor’s Choice

1. Synthesis and Structures of Lithium Salts of Stannole Anions

Masaichi Saito, Takuya Kuwabara, Kazuya Ishimura, Shigeru Nagase

Bull. Chem. Soc. Jpn. 2010, 83, 825–827.

DOI: 10.1246/bcsj.20100057

Books and Reviews

1. Review de Debut “環ひずみをもつ三配位リン化合物の触媒開発”

有機合成化学協会誌, 2018, 76, 1100–1101.

DOI: org/10.5059/yukigoseikyokaishi.76.1100

2. Siloles, Germoles, Stannoles, and Plumboles

Takuya Kuwabara, Masaichi Saito

Comprehensive Heterocyclic Chemistry IV (Fourth Edition)

2022, 3, 798–832.

DOI: 10.1016/B978-0-12-409547-2.14789-4