基本情報(Profile)
最終更新日(Last Updated)2025/12/29中西 一貴
Kazuki Nakanishi
中西 一貴
2023/03
広島大学(Hiroshima University)
先進理工系科学研究科基礎化学プログラム(Chemistry Cource, Graduated School of Advanced Science and Engineering)
| 有機金属化学(Organometallics) |
研究活動(Research Activities)
- 論文(Published Papers)
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2024/08/22 Surefire generation of stannylpotassium: highly reactive stannyl anions and applications
Chemical Science, 15, 15152-15159 , Peer-Reviewed2023/08/08 Redox Activity of IrIII Complexes with Multidentate Ligands Based on Dipyrido-Annulated N-Heterocyclic Carbenes: Access to High Valent and High Spin State with Carbon Donors
Chemistry -A European Journal, 29(63), e202302303 , Peer-Reviewed概要はこちら(Description) Synthetic strategies to access high-valent iridium complexes usually require use of π donating ligands bearing electronegative atoms (e. g. amide or oxide) or σ donating electropositive atoms (e. g. boryl or hydride). Besides the η5-(methyl)cyclopentadienyl derivatives, high-valent η1 carbon-ligated iridium complexes are challenging to synthesize. To meet this challenge, this work reports the oxidation behavior of an all-carbon-ligated anionic bis(CCC-pincer) IrIII complex. Being both σ and π donating, the diaryl dipyrido-annulated N-heterocyclic carbene (dpa-NHC) IrIII complex allowed a stepwise 4e− oxidation sequence. The first 2e− oxidation led to an oxidative coupling of two adjacent aryl groups, resulting in formation of a cationic chiral IrIII complex bearing a CCCC-tetradentate ligand. A further 2e− oxidation allowed isolation of a high-valent tricationic complex with a triplet ground state. These results close a synthetic gap for carbon-ligated iridium complexes and demonstrate the electronic tuning potential of organic π ligands for unusual electronic properties.
2023/05/03 Efficient one-pot synthesis of dan-substituted organo- and silyl-boron compounds
Organic & Biomolecular Chemistry, 21, 5347-5350 , Peer-Reviewed2022/05/03 A stable silylborane with diminished boron Lewis acidity / A stable silylborane with diminished boron Lewis acidity
DALTON TRANSACTIONS / DALTON TRANSACTIONS, 51(17), 6543-6546 , Peer-Reviewed , 10.1039/d2dt00962e1477-9226, 3.5445235E7 概要はこちら(Description) A new dimethyl(phenyl)silylborane having a naphthalene-1,8-diaminato (dan) substituent on the boron center, PhMe2Si-B(dan), was synthesized. Owing to the diminished boron Lewis acidity, it is highly stable toward air. Synthetic application of the silylborane to catalytic silylboration and silylation of alkynes is also described. A new dimethyl(phenyl)silylborane having a naphthalene-1,8-diaminato (dan) substituent on the boron center, PhMe2Si-B(dan), was synthesized. Owing to the diminished boron Lewis acidity, it is highly stable toward air. Synthetic application of the silylborane to catalytic silylboration and silylation of alkynes is also described.
2021/12/03 Origins of Internal Regioselectivity in Copper-Catalyzed Borylation of Terminal Alkynes / Origins of Internal Regioselectivity in Copper-Catalyzed Borylation of Terminal Alkynes
ACS CATALYSIS / ACS CATALYSIS, 11(23), 14381-14387 , Peer-Reviewed , 10.1021/acscatal.1c042442155-5435 概要はこちら(Description) Installation of a boron functionality into a more substituted carbon of terminal alkynes has been a challenging issue in chemical synthesis, since inherently Lewis acidic boron moieties, in principle, favor their attachment to a terminal carbon. Herein, we report on the highly internal-selective borylation of terminal alkynes under copper catalysis, wherein diminishment of boron-Lewis acidity and ligand-derived steric bulk around a copper center are the key to the success. In particular, the use of an anthranilamide-substituted boron moiety [B(aam)] is of high synthetic significance, because its properly diminished Lewis acidity enabled the internal regioselectivity and the Suzuki-Miyaura cross-coupling activity to be compatibly achieved. This method provided a direct and universal approach to variously substituted branched alkenylboron compounds, regardless of electronic and steric properties of a substituent on terminal alkynes. Installation of a boron functionality into a more substituted carbon of terminal alkynes has been a challenging issue in chemical synthesis, since inherently Lewis acidic boron moieties, in principle, favor their attachment to a terminal carbon. Herein, we report on the highly internal-selective borylation of terminal alkynes under copper catalysis, wherein diminishment of boron-Lewis acidity and ligand-derived steric bulk around a copper center are the key to the success. In particular, the use of an anthranilamide-substituted boron moiety [B(aam)] is of high synthetic significance, because its properly diminished Lewis acidity enabled the internal regioselectivity and the Suzuki-Miyaura cross-coupling activity to be compatibly achieved. This method provided a direct and universal approach to variously substituted branched alkenylboron compounds, regardless of electronic and steric properties of a substituent on terminal alkynes.
2021/07/05 Synthesis and Isolation of an Anionic Bis(dipyrido-annulated) N-Heterocyclic Carbene CCC-Pincer Iridium(III) Complex by Facile C-H Bond Activation
Inorganic Chemistry, 60(13), 9970-9976 , Peer-Reviewed , 10.1021/acs.inorgchem.1c012360020-1669 2020/12/14 A Digallane Gold Complex with a 12-Electron Auride Center; Synthesis and Computational Studies
Organometallics, 39(23), 4372-4379 , Peer-Reviewed , 10.1021/acs.organomet.0c005570276-7333
- 講演・口頭発表等(Lecture/Oral Presentation)
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2021/03/19-2021/03/22 Toward Iridium Complexes with High Oxidation States through All-carbon Ligated Pincer Ligand-type Aryl-substituted Dipyrido-annulated Carbenes, Kazuki Nakanishi, Rong Shang, Masaaki Nakamoto, Yohsuke Yamamoto, Hiroto Yoshida, Jimenez-Halla, J. Oscar C. , 第101回日本化学会年会 日本化学会, オンライン 2019/12/05-2019/12/07 Synthesis and Application of Iridium Complexes Bearing Bis-aryl functionalized Dipyrido-annulated Carbenes, Kazuki Nakanishi, Naoto Maeta, Rong Shang and Yohsuke Yamamoto, 第46回有機典型元素化学討論会 松山 2021/09/10-2021/09/13 Oxidation Behaviors of the Anionic Iridium Complex bearing All-carbon Ligated Pincer Ligands with Dipyrido-annulated Carbene Framework, Kazuki Nakanishi, Rong Shang, Yohsuke Yamamoto, J. Oscar C. Jimenez-Halla, Seiji Yamazoe, Masaaki Nakamoto and Hiroto Yoshida , 第67回有機金属化学討論会 オンライン 2019/09/19-2019/09/21 Synthesis and Property of Iridium(V) Complex with Dipyrido-annulated Carbenes, Kazuki Nakanishi, Naoto Maeta, Rong Shang and Yohsuke Yamamoto , 第66回有機金属化学討論会 八王子 2019/07/05-2019/07/07 ジアリール基を持つ新規カルベン三座配位子の開発とその応用, 中西 一貴，前田 直人，Shang Rong, 山本 陽介, 第54回有機反応若手の会 大阪 2018/12/06-2018/12/08 4,8位にアリール基を持つジピリド縮環型N-ヘテロ環状カルベンを用いたイリジウム錯体の合成, 中西 一貴，前田 直人，Shang Rong, 山本 陽介, 第45回有機典型元素化学討論会 新潟 2018/07/10-2018/07/12 ジピリド縮環型NHCを用いた新規イリジウム錯体の合成, 中西 一貴，前田 直人，Shang Rong, 山本 陽介, 第53回有機反応若手の会 埼玉 2017/07/03-2017/07/05 新規ジピリド縮環型一重項カルベンの合成と応用, 中西 一貴，前田 直人，Shang Rong, 山本 陽介, 第52回有機反応若手の会 津
- 学位(Degree)
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修士 広島大学大学院 博士(理学) 広島大学大学院 学位 広島大学
