九州大学 研究者情報
論文一覧
永島 英夫(ながしま ひでお) データ更新日:2019.07.05

教授 /  先導物質化学研究所 分子集積化学部門


原著論文
1. Yusuke Sunada, Hajime Ogushi, Taiji Yamamoto, Shoko Uto, Mina Sawano, Atsushi Tahara, Hiromasa Tanaka, Yoshihito Shiota, Kazunari Yoshizawa, Hideo Nagashima, Disilaruthena- and Ferracyclic Complexes Containing Isocyanide Ligands as Effective Catalysts for Hydrogenation of Unfunctionalized Sterically Hindered Alkenes, Journal of the American Chemical Society, 10.1021/jacs.8b00812, 140, 11, 4119-4134, 2018.03, [URL], Disilaferra- and disilaruthenacyclic complexes containing mesityl isocyanide as a ligand, 3′ and 4′, were synthesized and characterized by spectroscopy and crystallography. Both 3′ and 4′ showed excellent catalytic activity for the hydrogenation of alkenes. Compared with iron and ruthenium carbonyl analogues, 1′ and 2′, the isocyanide complexes 3′ and 4′ were more robust under the hydrogenation conditions, and were still active even at higher temperatures (∼80 °C) under high hydrogen pressure (∼20 atm). The iron complex 3′ exhibited the highest catalytic activity toward hydrogenation of mono-, di-, tri-, and tetrasubstituted alkenes among currently reported iron catalysts. Ruthenium complex 4′ catalyzed hydrogenation under very mild conditions, such as room temperature and 1 atm of H2. The remarkably high catalytic activity of 4′ for hydrogenation of unfunctionalized tetrasubstituted alkenes was especially notable, because it was comparable to the activity of iridium complexes reported by Crabtree and Pfaltz, which are catalysts with the highest activity in the literature. DFT calculations suggested two plausible catalytic cycles, both of which involved activation of H2 assisted by the metal-silicon bond through σ-bond metathesis of late transition metals (oxidative hydrogen migration). The linear structure of M C≡N - C (ipso carbon of the mesityl group) played an essential role in the efficient hydrogenation of sterically hindered tetrasubstituted alkenes..
2. Yusuke Sunada, Nobuhiro Taniyama, Kento Shimamoto, Soichiro Kyushin, Hideo Nagashima, Construction of a planar tetrapalladium cluster by the reaction of palladium(0) bis(isocyanide) with cyclic tetrasilane, Inorganics, 10.3390/inorganics5040084, 5, 4, 2017.12, [URL], The planar tetrapalladium cluster Pd4{Si(iPr)2}3(CNtBu)4 (4) was synthesised in 86% isolated yield by the reaction of palladium(0) bis(isocyanide) Pd(CNtBu)2 with octaisopropylcyclotetrasilane (3). In the course of this reaction, the palladium atoms are clustered via insertion into the Si-Si bonds of 3, followed by extrusion of one SiiPr2 moiety and reorganisation to afford 4 with a 54-electron configuration. The CNtBu ligand in 4 was found to be easily replaced by N-heterocyclic carbene (iPr2IMMe) to afford the more coordinatively unsaturated cluster Pd4{Si(iPr)2}3(iPr2IMMe)3 (5) having the planar Pd4Si3 core. On the other hand, the replacement of CNtBu with a sterically compact ligand trimethylolpropane phosphite {P(OCH2)3CEt} led to a planar tripalladium cluster Pd3{Si(iPr)2}3{P(OCH2)3CEt}3 (6) and Pd{P(OCH2)3CEt}4 in 1:1 molar ratio as products..
3. Yusuke Sunada, Hideo Nagashima, Disilametallacyclic chemistry for efficient catalysis, Dalton Transactions, 10.1039/c7dt01275f, 46, 24, 7644-7655, 2017.07, [URL], This article discusses two new features of disilametallacyclic chemistry that contribute to the development of efficient catalytic reactions in organic synthesis. The first is disilametallacyclic intermediates in the hydrosilane reduction of carbonyl compounds. Experimental and theoretical studies on disilaplatinacycles suggested that the H2Pt(iv)Si2 species generated by oxidative addition of 1,2-bis(dimethylsilyl)benzene behaves as a highly reactive hydride to reduce amides to amines. This mechanism via disilametallacyclic intermediates explains the efficient hydrosilane reduction of carbonyl compounds with α,ω-bifunctional hydrosilanes catalyzed by other transition metals. The second is hydrogenation of alkenes by disilaferra- or disilaruthenacyclic complexes as catalyst precursors. A new mechanism not involving the conventional oxidative addition of H2 was suggested from DFT calculations, in which activation of the H-H bond occurs in the metal-silicon bond of the disilametallacyclic intermediate. Disilametallacyclic intermediates contribute to efficient catalytic reactions through this σ-CAM (σ-complex assisted mechanism) type mechanism..
4. Konoka Hoshi, Atsushi Tahara, Yusuke Sunada, Hironori Tsutsumi, Ryoko Inoue, Hiromasa Tanaka, Yoshihito Shiota, Kazunari Yoshizawa, Hideo Nagashima, α-CAM mechanisms for the hydrogenation of alkenes by cis- and trans- disilametallacyclic carbonyl complexes (M = Fe, Ru, Os)
Experimental and theoretical studies, Bulletin of the Chemical Society of Japan, 10.1246/bcsj.20170004, 90, 5, 613-626, 2017.05, [URL], The hydrogenation of alkenes catalyzed by disilametallacyclic carbonyl complexes of iron, ruthenium or osmium was studied experimentally and theoretically. The disilaruthenacycle 2 with two CO ligands in the trans-configuration was prepared, characterized, and its ability to catalyze hydrogenation was studied. Similar to the corresponding iron analogue 1 in which the CO ligands are in the cis-configuration, 2 contains a H2MSi4 core with SiHSi SISHA (secondary interaction of silicon and hydrogen atoms) and catalyzed the hydrogenation of several alkenes under mild conditions. DFT calculations of 1 and 2 with cis- and trans-CO configurations (cis-1, trans-1, cis-2 and trans-2) revealed that the mechanism of ethylene hydrogenation comprises three catalytic cycles, and a key step involves the H-H bond of H2 being activated by an M-Si bond through oxidative hydrogen migration. These mechanisms are a variety of α-CAM (complex-assisted metathesis) mechanisms. Further calculations suggest that these catalytic cycles can apply to the catalytic hydrogenation of ethylene by osmium analogues of 1 and 2 (cis-3 and trans-3). Some of the elementary reactions in the cycles are dependent on the metal, and the osmium complexes show different performance from the iron and ruthenium analogues due to the characteristic natures of the third-row transition metals..
5. Yusuke Sunada, Hideo Nagashima, Design and development of iron-based non-precious metal catalyst systems, Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, 10.5059/yukigoseikyokaishi.75.1253, 75, 12, 1253-1263, 2017.01, [URL], Precious metal compounds are widely used as catalysts in recent organic synthesis in both academic and industrial researches. Recently, development of new iron-based catalyst systems that can be a substitute of noble metal catalyst is desired from the point of view of scarcity of the element and the toxicity of the precious metal residue in the products. However, design and synthesis of iron catalysts is often difficult due to the existence of multiple spin states in close energy levels. In addition, instability of organoiron species toward air and moisture also prevents the synthesis of catalytically active iron species. In this paper is presented our recent effort to develop the efficient iron catalyst system. First, low-spin design of the iron catalyst that can catalyze the reaction involving two-electron redox pathway is investigated based on the strategy of construction of the disilaferracyclic complexes. Second, novel efficient and easy-to-handle iron catalyst system consisting of iron precursor and isocyanide ligands is developed for the hydrosi-lylation of alkenes..
6. Hideo Nagashima, Catalyst design of iron complexes, Bulletin of the Chemical Society of Japan, 10.1246/bcsj.20170071, 90, 7, 761-775, 2017.01, [URL], Despite worldwide interest from synthetic chemists, the rational design of catalytically active organoiron species remains problematic. While noble metal catalysis proceeds through diamagnetic low-spin intermediates, iron species are often in the high or intermediate spin states, which are paramagnetic and difficult to analyze. Possible spin change during catalysis also complicates the problem. This report describes two extremes for the catalyst design of iron complexes. One involves diamagnetic 14-electron iron(II) species useful for two-electron chemistry often seen in noble metal catalysis. The disilaferracyclic carbonyl complex 4 is a good catalyst precursor, and shows good catalytic performance for the hydrogenation and hydrosilylation of alkenes, and the hydrosilane reduction of carbonyl compounds. Based on DFT calculations, mechanisms involving ·-CAM (sigma-complex-assisted metathesis) for the hydrogenation and hydrosilane reduction are suggested. Further catalyst design inspired by the success of 4 led to the discovery of iron and cobalt catalyst systems composed of metal carboxylates and isocyanide ligands leading to a practical substitute for industrially useful platinum catalysts for hydrosilylation with hydrosiloxanes. The second approach involves paramagnetic 16-electron iron (II) catalyst species. A series of "(R3TACN)FeX2" complexes were prepared and found to be good catalysts for atom transfer radical polymerization, giving rise to well-controlled polymerization of styrene, methacrylates, and acrylates with high activity. Moreover, the catalyst could be easily removed from the polymer and was reusable. Mechanistic studies of iron-catalyzed crosscoupling reactions in collaboration with Nakamura and Takaya opened a new approach to the catalyst design of unknown spin states by using new analytical methods for paramagnetic species in the solution state..
7. Atsushi Tahara, Hiromasa Tanaka, Yusuke Sunada, Yoshihito Shiota, Kazunari Yoshizawa, Hideo Nagashima, Theoretical Study of the Catalytic Hydrogenation of Alkenes by a Disilaferracyclic Complex
Can the Fe-Si σ-Bond-Assisted Activation of H-H Bonds Allow Development of a Catalysis of Iron?, Journal of Organic Chemistry, 10.1021/acs.joc.6b01961, 81, 22, 10900-10911, 2016.11, [URL], The mechanisms associated with the hydrogenation of alkenes catalyzed by the iron complex Fe(cis-CO)2{o-(SiMe2)2C6H4}2(H)2 (1) were investigated by DFT calculations. The complex 1 has a structure in which the iron center is bonded to four silicon atoms and two hydrides. Secondary Si···H···Si interactions were also observed. The exchange of a 1,2-bis(dimethylsilyl)benzene ligand with ethylene and hydrogen gives a disilaferracycle bearing η2-(CH2=CH2) and η2-H2 ligands. The catalytic cycle initiated from the disilaferracycle involves cleavage of a H-H linkage assisted by an Fe-Si bond to form Fe-H and η1-(H-Si) moieties (step 1), hydrogen migration from the Fe-H group to the η2-(CH2=CH2) ligand which accomplishes the insertion of ethylene into the Fe-H bond (step 2), and reaction of the resulting β-agostic ethyl moiety with the η2-(H-Si) group to form ethane on the iron atom (step 3). The octahedral geometry of 1 as well as the presence of π-acidic CO ligands and Fe-Si σ-bonds contributes to all of the catalytic intermediates and the transition states being in the low-spin state. Steps 1 and 3 correspond to the σ-complex-assisted metathesis (σ-CAM) mechanisms proposed by Perutz and Sabo-Etienne, suggesting that these mechanisms can assist in the design of iron-based hydrogenation catalysts operating under mild conditions..
8. Hideo Nagashima, 野田 大輔, Yusuke Sunada, Atsushi Tahara, Non-Precious-Metal Catalytic Systems Involving Iron or Cobalt Carboxylates and Alkyl Isocyanides for Hydrosilylation of Alkenes with Hydrosiloxanes, Journal of American Chemical Society, 138, 8, 2480-2483, 2016.03.
9. Hideo Nagashima, Shigeyoshi Sakaki, Yusuke Sunada, Theoretical Study of Pd11Si6 Nanosheet Compounds Including Seven-Coordinated Si Species and Its Ge Analogues, Chemistry A European Journal, 22, 3, 1076-1087, 2016.02.
10. Hideo Nagashima, So-ichiro Nakanishi, Yusuke Sunada, Atom Transfer Radical Polymerization by Solvent-stabilized (Me3TACN)FeX2: A Practical Access to Reusable Iron(II) Catalysts, Polymer Chemistry, 7, 5, 1037-1048, 2016.03.
11. Hideo Nagashima, Take-aki Iwamoto, Yusuke Sunada, Yoshihito Shiota, Persistent Four-coordinate Iron-centered Radical Stabilized by π-donation, Chemical Science, 7, 1, 191-198, 2016.01.
12. Hideo Nagashima, Atsushi Tahara, Yusuke Sunada, YUKIHIRO MOTOYAMA, Hironori Tsutsumi, Catalyst Design of Vaska-Type Iridium Complexes for Highly Efficient Synthesis of π-Conjugated Enamines, Organometallics, 34, 20, 4895-4907, 2015.08.
13. Hideo Nagashima, Daisuke Noda, Yusuke Sunada, Hiroe Soejima, Hironori Tsutsumi, Combinatorial Approach to the Catalytic Hydrosilylation of Styrene Derivatives: Catalyst Systems Composed of Organoiron(0) or (II) Precursors and Isocyanides, Organometallics, 34, 12, 2896-2906, 2015.08.
14. Hideo Nagashima, Gao Lei, Keisuke Kojima, Transition Metal Nanoparticles Stabilized by Ammonium Salts of Hyperbranched Polystyrene: Effect of Metals on Catalysis of the Biphasic Hydrogenation of Alkenes and Arenes, Tetrahedron, 71, 37, 6414-6423, 2015.07.
15. Hideo Nagashima, Efficient Transition Metal-Catalyzed Reactions of Carboxylic Acid Derivatives with Hydrosilanes and Hydrosiloxanes, Afforded by Catalyst Design and the Proximity Effect of Two Si-H Groups, Synlett, 10.1055/s-0034-1379989, 26, 866-890, 2015.03.
16. Hideo Nagashima, Hikaru Takaya, Masaharu Nakamura, et al, Investigation of Organoiron Catalysis in KumadaTamaoCorriu-Type Cross-Coupling Reaction Assisted by Solution-Phase X-ray Absorption Spectroscopy, Bull. Chem. Soc. Jpn., 10.1246/bcsj.20140376, 88, 410-418, 2015.03.
17. 永島 英夫, 高分子保護剤を用いるナノ金属粒子触媒, 高分子, 2014.07.
18. Hideo Nagashima, Yusuke Sunada, Hiroe Soejima, Disilaferracycle Dicarbonyl Complex Containing Weakly Coordinated η2-(H-Si) Ligands: Application to C–H Functionalization of Indoles and Arenes, Organometallics, 10.1021/om500794f, 33, 5936-5939, 2014.12.
19. Hideo Nagashima, Daisuke Noda, Ren-Hua Jin, Daiki Souma, Yoshiaki Arai, “Poly(N-cyanoethylethyleneimine): a new nanoscale template for biomimetic silicification”,, Chem. Commun.,, DOI: 10.1039/C4CC02285, 50, 10793-10796, 2014.10.
20. Hideo Nagashima, Arada Chaiyanurakkul, Gao Lei, Takashi Nishikata, Keisuke Kojima, “Catalysis on Water: Hydrogenation of Ketones and Aldehydes by Platinum Nanoparticles Dispersed in Amphiphilic Hyperbranched Polystyrene, Pt@HPS-NR3+Cl−”, Chem. Lett. , 10.1246/cl.140334, 43, 1233-1235, 2014.07.
21. Hideo Nagashima, Toru Hashimoto, Shohei Umino, Atsushi Tahara, “Me2S-induced Highly Selective Reduction of Aldehydes in the Presence of Ketones Involving Aldehyde-selective Rate Enhancement: A Triruthenium Cluster-catalyzed Hydrosilylation”, Chem. Lett. , 10.1246/cl.140731, 43, 1829–1831, 2014.07.
22. Hideo Nagashima, Mitsunobu Kawamura, So-ichiro Nakanishi, Jin Ren Ha, Hidetomo Kai, Yusuke Sunada, Well- Defined Iron Complexes as Efficient Catalysts for "Green" Atom-Transfer Radical Polymerization of Styrene, Methyl Methacrylate, and Butyl Acrylate with Low Catalyst Loadings and Catalyst Recycling, Chem. Eur. J.,, DOI: 10.1002/chem.201304593, 20, 5802-5814, 2014.03, 完全分離、回収再利用可能な鉄TACN触媒を用いる制御されたラジカル重合.
23. Hideo Nagashima, Takashi Nishikata, Hironori Tatsumi, Lei Gao, Keisuke Kojima, Katsumi Chikama, Adhesive Catalyst Immobilization of Palladium Nanoparticles on Cotton and Filter Paper: Applications to Reusable Catalysts for Sequential Catalytic Reactions, Adv. Synth. Catal., DOI: 10.1002/adsc.201300691, 356, 951-960, 2014.02, ハイパーブランチポリマーを保護剤とするナノパラジウム触媒の固定化と触媒作用.
24. Hideo Nagashima, Takashi Nishikata, Hironori Tatsumi, Lei Gao, Keisuke Kojima, Katsumi Chikama, Adhesive Catalyst Immobilization of Palladium Nanoparticles on Cotton and Filter Paper: Applications to Reusable Catalysts for Sequential Catalytic Reactions, Chem. Asian. J., DOI: 10.1002/asia.201301184, 9, 71-74, 2013.10, ハイパーブランチポリマーを保護剤とするナノパラジウム触媒の固定化と触媒作用.
25. Hideo Nagashima, YUKIHIRO MOTOYAMA, Masahiro Taguchi, Nelfa Desmira, Seongho YOON, Isao Mochida, Chemoselective hydrogenation of functionalized nitroarenes and imines by using carbon nanofiber-supported iridium nanoparticles, ChemCatChem, DOI: 10.1002/asia.201301184, 9, 71-74, 2013.10, ナノ炭素担持触媒.
26. Hideo Nagashima, Yusuke Sunada, Hironori Tsutsumi, Keisuke Shigeta, Ryota Yoshida, Catalyst design for iron-promoted reductions: an iron disilyl-dicarbonyl complex bearing weakly coordinating η2-(H-Si) moieties, Dalton. Trans., 10.1039/c3dt52598h, 42, 16687-16692, 2013.10, 新鉄触媒と触媒反応.
27. Hideo Nagashima, Gao Lei, Takashi Nishikata, Keisuke Kojima, Katsumi Chikama, Water- and Organo-Dispersible Gold Nanoparticles Supported by Using Ammonium Salts of Hyperbranched Polystyrene: Preparation and Catalysis, Chem. Asian. J., DOI: 10.1002/asia.201300871, 8, 3152-3163, 2013.08, ハイパーブランチポリマーを担体とするナノ金粒子触媒.
28. Hideo Nagashima, Yusuke Sunada, Ryohei Haige, Kyohei Otsuka, So-ichiro Kyushin, “A ladder polysilane as a template for folding palladium nanosheets”, , Nat. Commun., DOI: 10.1038/ncomms3014, 4, 3014/1-3014/7, 2013.05, 世界最大のパラジウムナノシートの合成.
29. Hideo Nagashima, Yusuke Sunada, Tsuyoshi Imaoka, Disilametallacycles as a Platform for Stabilizing M(II) and M(IV) (M = Fe, Ru) Centers: Synthesis and Characterization of Half-Sandwich Complexes and Their Application to Catalytic Double Silylation of Alkenes and Alkynes, Organometallics, 32, 2112-2120, 2013.03, 鉄持白めたらサイクルの合成と反応.
30. Hideo Nagashima, Soichiro Kyushin, Yuki Toma, Takayoshi Kuribara, Takuya Iizuka, Synthesis, structure, and electronic properties of benzohexasilabicyclo[2.2.2]octene, Chem. Lett., 250-252, 2013.01, 発光機能をもつ新ケイ素化合物の開発.
31. Hideo Nagashima, 堤 大典, Takashi Nishikata, Kazunobu Igawa, Keisuke Kojima, Katsumi Chikama, Hydrophobicity/hydrophilicity tunable hyperbranched polystyrenes as novel supports for transition-metal nanoparticles, Chem. Commun., 48, 10666-10668, 2012.11, のハイパーブランチポリマー坦持白金触媒の合成と触媒的水素化.
32. Hideo Nagashima, 野田 大輔, Yusuke Sunada, Takuji Hatakeyama, Masaharu Nakamura, Iron promoted conjugate addition: implication of the six-centered mechanism based on the isolation of the iron-enolate intermediate, Chem. Commun., 48, 12231-12233, 2012.11, 鉄錯体を用いる共役付加反応.
33. Hideo Nagashima, YUKIHIRO MOTOYAMA, Seongho YOON, Isao Mochida, Keita Tsuji, Youngjin Lee, (Z)-Selective Partial Hydrogenation of Internal Alkynes by Using Palladium Nanoparticles Supported on Nitrogen-Doped Carbon Nanofiber, ChemCatChem, 51, 778-781, 2012.08, 坦持パラジウム触媒を用いるアルキンの水素化.
34. Hideo Nagashima, Takashi Nishikata, N-Alkylation of Tosylamides Using Esters as Primary- and Tertiary-Alkyl Sources Mediated by Hydrosilanes Activated by a Ruthenium Catalyst, Angew. Chem., Int. Ed., 51, 5363-5366, 2012.06, ルテニウム触媒でヒドロシランを活性化することにより、エステルをアルキル源とするトシルアミドのN-アルキル化反応を達成した。.
35. Nari-aki Harada, Takashi Nishikata, and Hideo Nagashima, Vinyl Polymerization vs [1,3] O to C Rearrangement in the Ruthenium Catalyzed Reactions of Vinyl Ethers with Hydrosilanes, Tetrahedron, 3, 3243-3252, 2012.01.
36. Yukihiro Motoyama, Youngjin Lee, Keita Tsuji, Seong-Ho Yoon, Isao Mochida, Hideo Nagashima, Platinum Nanoparticles Supported on Nitrogen-doped Carbon Nanofibers as Efficient Poisoning Catalysts for the Hydrogenation of Nitroarenes, ChemCatChem, 3, 1578-1581, 2011.09.
37. Hironori Tsutsumi, Yusuke Sunada, Hideo Nagashima, New catalyst systems for iron-catalyzed hydrosilane reduction of carboxamides, Chem. Commun,, 47, 6581-6583, 2011.07.
38. Hideo Nagashima, Yuichi Kubo, Mitsunobu Kawamura, Takashi Nishikata, Yukihiro Motoyama, Hydrosilanes are not always a reducing reagent: a ruthenium-catalyzed introduction of primary alkyl groups to electron-rich aromatic rings using esters as a source of the alkyl groups, Tetrahedron, 67, 7667-7672, 2011.07.
39. Konoka Miyamoto, Yukihiro Motoyama, Hideo Nagashima, Selective Reduction of Carboxylic Acids to Aldehydes by a Ruthenium-Catalyzed Reduction with 1,2-Bis(dimethylsilyl)benzene, Chem. Lett., 41, 229-231, 2012.02.
40. Nari-aki Harada, Jushiro Yasuhara, Yukihiro Motoyama, Osamu Fujimura, Tetsuro Tsuji, Takeshi Takahashi, Yoshiaki Takahashi, Hideo Nagashima, A Ruthenium-Catalyzed Hydrosilane-Induced Polymerization of 3-Alkyl-3-hydroxymethyloxetane Derivatives: Facile Access to Functionalized Polyoxetanes by Virtue of Organosilyl Groups, Bull. Chem. Soc. Jpn., 84, 26–39 , 2011.01.
41. Hironori Tsutsumi, Yusuke Sunada, Hideo Nagashima, Novel Disilaplatinacyclopentenes Bearing Dialkylsulfide Ligands: Preparation, Characterization, and Mechanistic Consideration of Hydrosilane Reduction of Carboxamides by Bifunctional Organohydrosilanes, Organometallics, 6, 68-76, 2011.01.
42. Yukihiro Motoyama, Takashi Nishikata, Hideo Nagashima, A Chiral Bis(oxazoline) Ligand Embedded into Polysiloxane Gel: Application to a Reusable Copper Catalyst for Asymmetric Cyclopropanation, Chem. Asian. J , 6, 78-82, 2011.01.
43. Yusuke Sunada, Tsuyoshi Imaoka, Hideo Nagashima, Half-Sandwich (6-Arene)iron(II) Dinitrogen Complexes Bearing a Disilaferracycle Skeleton as a Precursor for Double Silylation of Ethylene and Alkynes, Organometallics, 29,, 6157-6160 , 2011.09.
44. Shiori Hanada, Akihiro Yuasa, Hirotaka Kuroiwa, Yukihiro Motoyama, Hideo Nagashima, Hydrosilanes Are Not Always Reducing Agents for Carbonyl Compounds, II: Ruthenium-Catalyzed Deprotection of tert-Butyl Groups in Carbamates, Eur. J. Org. Chem, 1021-1025, 2011.03.
45. Yukihiro Motoyama, Kazuyuki Kamo, Akihiro Yuasa, Hideo Nagashima, Catalytic atom-transfer radical cyclization by copper/bipyridine species encapsulated in polysiloxange gel, Chemical Communications, 2256-2258, 2010.03.
46. Hanada, S; Yuasa, A.; Kuroiwa, H.; Motoyama, Y.; Nagashima, H., Hydrosilanes Are Not Always Reducing Agents for Carbonyl Compounds, II: Ruthenium-Catalyzed Deprotection of tert-Butyl Groups in Carbamates, Carbonates, Esters, and Ethers., Eur. J. Org. Chem., 6, 1021-1025, 2010.01.
47. Hanada, S; Tsutsumi, E; Motoyama, Y; Nagashima, H., Practical access to amines by platinum-catalyzed reduction of carboxamides with hydrosilanes: Synergy of dual Si-H groups leads to high efficiency and selectivity., J. Am. Chem. Soc., 131, 15032-15040, 2009.10.
48. Kawamura, M; Sunada, Y; Kai, H; Koike, N; Hamada, A; Hayakawa, H; Jin, R. –H; Nagashima, H., New Iron(II) Complexes for Atom-Transfer Radical Polymerization: The Ligand Design for Triazacyclononane Results in High Reactivity and Catalyst Performance., Organic Letters, 351, 2086-2090, 2009.10.
49. Motoyama, Y; Takasaki, M; Yoon, S. -H; Mochida, I; Nagashima, H., Rhodium Nanoparticles Supported on Carbon Nanofibers as an Arene Hydrogenation Catalyst Highly Tolerant to a Coexisting Epoxido Group, Organic Letters, 11, 5042-5045, 2009.10.
50. Noda, D; Tanabiki, M; Tsuchiya, K; Sunada, Y; Nagashima, Mono- and bimetallic ethylene polymerization catalysts having an azanickellacyclopentene skeleton., Polyhedron, 28, 3935-3944, 2009.10.
51. Sunada, Y; Kawakami, H; Imaoka, T; Motoyama, Y; Nagashima, H., Hydrosilane Reduction of Tertiary Carboxamides by Iron Carbonyl Catalysts., Angew. Chem. Int. Ed., 48, 9511-9514, 2009.10.
52. Noda, D; Sunada, Y; Hatakeyama, T; Nakamura, M; Nagashima, H., Effect of TMEDA on Iron-Catalyzed Coupling Reactions of ArMgX with Alkyl Halides., J. Am. Chem. Soc., 131, 6078-6079, 2009.06.
53. Hironori TSUTSUMI, Yusuke SUNADA, Yoshihito SHIOTA, Kazunari YOSHIZAWA, Hideo NAGASHIMA, (3-Allyl)Ni(II), Pd(II), and Pt(II) Complexes Bearing a Bidentate Titanium(IV) Phosphinoamide Ligand: a Ti ← M2 Dative Bond Enhances the Electrophilicity of the -Allyl Moiety, Organometallics, 2009.03.
54. Hideo KONDO, Takashi SUE, Akira KAGEYAMA, Yoshitaka YAMAGUCHI, Yusuke SUNADA, Hideo NAGASHIMA, Two coordination modes of TCNE in the ruthenium amidinates: The first example providing experimental evidence for 1-N to 2-C rearrangement, Journal of Organometallic Chemistry, 2009.01.
55. Yukihiro MOTOYAMA, Masaharu AOKI, Naoki TAKAOKA, Ryuta AOTO, Hideo NAGASHIMA, Highly efficient synthesis of aldenamines from carboxamides by iridium-catalyzed silane-reduction/dehydration under mild conditions, Chemical Communications , (12) 1574 – 1576 (2008), 2009.01.
56. Yukihiro MOTOYAMA, Motonori ABE, Kazuyuki KAMO, Hideo NAGASHIMA, Encapsulated molecular catalysts in polysiloxane gels: ruthenium cluster-catalyzed isomerization of alkenes, Chemical Communications , 2008.10.
57. Yusuke SUNADA, Yoshiki FUJIMURA, Hideo NAGASHIMA, Synergistic Effects of Two Si-H Groups and a Metal Center" in Transition Metal-Catalyzed Hydrosilylation of Unsaturated Molecules: A Mechanistic Study of the RhCl(PPh3)3-Catalyzed Hydrosilylation of Ketones with 1,2-Bis(dimethylsilyl)benzene, Organometallics, 2008.07.
58. Yukihiro MOTOYAMA, Kazuyuki KAMO, Hideo NAGASHIMA, Catalysis in Polysiloxane Gels: Platinum-Catalyzed Hydrosilylation of Polymethylhydrosiloxane Leading to Reusable Catalysts for Reduction of Nitroarenes, Organic Letters, 2008.06.
59. Shiori HANADA, Yukihiro MOTOYAMA, Hideo NAGASHIMA, Hydrosilanes are not always reducing agents for carbonyl compounds but can also induce dehydration: a ruthenium-catalyzed conversion of primary amides to nitriles, European Journal of Organic Chemistry , (24) 4097-4100 (2008), 2008.05.
60. Tsuchiya, K., Ideta, K., Mogi. K., Sunada, Y.; Nagashima, H., Experimental and theoretical aspects of the haptotropic rearrangement of diiron and diruthenium carbonyl complexes bound to 4,6,8-trimethylazulene., Dalton Transaction, 2008, 2708-2716., 2008.05.
61. Takasaki, M.; Motoyama, Y.; Higashi, K.; Yoon, S. -H.; Mochida, I.; Nagashima, H., Chemoselective Hydrogenation of Nitroarenes with Carbon Nanofiber-Supported Platinum and Palladium Nanoparticles., Organic Letters, 2008, 10, 1601-1604., 2008.05.
62. M. Takasaki, Y. Motoyama, K. Higashi, S –H. Yoon, I. Mochida, H. Nagashima, Highly Efficient Synthesis of Optically Pure 5,5',6,6',7,7',8,8'-Octahydro-1,1'-bi-2-naphthol and -naphthylamine Derivatives by Partial Hydrogenation of 1,1'-Binaphthyls with Carbon Nanofiber Supported Ruthenium Nanoparticles., J. Org. Chem., 72, 10291-10293 , 2007.11.
63. M. Takasaki, Y. Motoyama, K. Higashi, S. -H. Yoon, I. Mochida, H. Nagashima, Ruthenium Nanoparticles on Nano-Level-Controlled Carbon Supports as Highly Effective Catalysts for Arene Hydrogenation, Chem. Asian J., 2007.10.
64. M. Tanabiki, Y. Sunada, H. Nagashima, A bis-[C(trimethylsilyl)-N-arylimino]dimethylsilane, Me3Si(C=NAr)SiMe2(C=NAr)SiMe3 (Ar = 2,6-xylyl), as a New -Diimine Ligand, Organometallics , 26, 6055 - 6058, 2007.10.
65. H. Sasakuma, Y. Motoyama, H. Nagashima, Functional Group-Selective Poisoning of Molecular Catalysts: A Ruthenium Cluster-Catalyzed Highly Amide-Selective Silane Reduction That does not Affect Ketones or Esters, Chem. Commun., 2007.09.
66. S. Hanada, T. Ishida, Y. Motoyama, H. Nagashima, The Ruthenium-Catalyzed Reduction and Reductive N-Alkylation of Secondary Amides with Hydrosilanes: Practical Synthesis of Secondary and Tertiary Amines by Judicious Choice of Hydrosilanes, J. Org. Chem., The Ruthenium-Catalyzed Reduction and Reductive N-Alkylation of Secondary Amides with Hydrosilanes: Practical Synthesis of Secondary and Tertiary Amines by Judicious Choice of Hydrosilanes, 2007.08.
67. T. Sue, Y. Sunada, H. Nagashima, Zirconium(IV) Tris(phosphinoamide) Complexes as the Tripod-type Metalloligand: A Novel Route to Zr-M (M = Cu, Mo, Pt) Heterobimetallic Complexes., Eur. J. Inorg. Chem., 2007.05.
68. S. Niibayashi, H. Hayakawa, R. –H. Jin, H. Nagashima, Reusable and environmentally friendly ionic trinuclear iron complex catalyst for atom transfer radical polymerization., Chem. Commun., 2007.02.
69. K. Tsuchiya, H. Kondo, H. Nagashima, Ring Expansion of a Platinacyclopropane to a Platinacyclopentane by Double Insertion of Isocyanides into Pt-C Bonds., Organometallics, 26, 1044-1051, 2007.01.
70. K. Tsuchiya, H. Nagashima, Spectroscopic and Crystallographic Studies on the Insertion Reaction of Aryl Isocyanides into the Bond between Palladium and Carbon, which Contribute to Understanding the trans-[Br2Ni(CNAr)2]-catalyzed Ethylene Polymerization, 総理工報告(Engineering Science Reports, Kyushu University), 2006.12.
71. T. Hayashida, H. Kondo, J. Terasawa, K. Kirchner, Y. Sunada, H. Nagashima, Trifluoromethanesulfonate (triflate) as a moderately coordinating anion: Studies from chemistry of the cationic coordinatively unsaturated mono- and diruthenium amidinates., J. Organomet. Chem., 692, 382-394, 2006.08.
72. Y. Motoyama, M. Takasaki, K. Higashi, S. -H. Yoon, I. Mochida, H. Nagashima, Highly-dispersed and size-controlled ruthenium nanoparticles on carbon nanofibers: preparation, characterization, and catalysis, Chem. Lett., 35, 876-877, 2006.07.
73. S. Hanada, Y. Motoyama, H. Nagashima, Dual Si-H effects in platinum-catalyzed silane reduction of carboxamides leading to a practical synthetic process of tertiary amines involving self-encapsulation of the catalyst species into the insoluble silicone resin formed., Tetrahedron Lett., 47, 6173-6177, 2006.06.
74. Y. Sunada, T. Sue, T. Matsumoto, H. Nagashima, Titanium(IV) phosphinoamide as a unique bidentate ligand for late transition metals II: TiRu heterobimetallics bearing a bridging chlorine atom, J. Organomet. Chem., 691, 3176-3182, 2006.04.
75. H. Nagashima, T. Sue, T. Oda, A. Kanemitsu, T. Matsumoto, Y. Motoyama, Y. Sunada, Dynamic Titanium Phosphinoamides as Unique Bidentate Phosphorus Ligands for Platinum, Organometallics, 25, 1987-1994, 2006.03.
76. Y. Motoyama, S. Hanada, K. Shimamoto, H. Nagashima, A coordinatively unsaturated ruthenium methoxide as a highly effective catalyst for the halogen atom-transfer radical cyclization of N-allyl dichloroacetamides and related reactions, Tetrahedron, 62, 2779-2788, 2006.02.
77. Y. Motoyama, C. Itonaga, T. Ishida, M. Takasaki, H. Nagashima, Catalytic reduction of amides to amines with hydrosilanes by a triruthenum carbonyl cluster, Org. Syn. , 82, 188-195, 2005.12.
78. Motoyama, Y.; Mitsui, K.; Ishida, T.; Nagashima, H., “Self-Encapsulation of Homogeneous Catalyst Species into Polymer Gel Leading to a Facile and Efficient Separation System of Amine Products in the Ru-Catalyzed Reduction of Carboxamides with Polymethylhydrosiloxane (PMHS).”, J. Am. Chem. Soc., 10.1021/ja0544531, 127, 38, 13150-13151, 127, 13150-13151, 2005.08.
79. Ikedou, K.; Yamamoto, Y.; Nagashima, H.; Nemoto, N., Crystal Structures of n-Alkanes with Branches of Different Size in the Middle, J. Phys. Chem. B, 10.1021/jp044119w, 109, 21, 10668-10675, 109, 10668-10675, 2005.06.
80. Motoyama, Y.; Hanada, S.; Niibayashi, S.; Shimamoto, K.; Takaoka, N.; Nagashima, H., Atom-transfer radical reactions catalyzed by a coordinatively unsaturated diruthenium amidinate, [(5-C5Me5)Ru(2-i-PrNC(Me)Ni-Pr)Ru(5-C5Me5)]+.”, Tetrahedron, 10.1016/j.tet.2005.08.037, 61, 43, 10216-10226, 61, 10216-10226, 2005.01.
81. Tanabiki, M.; Tsuchiya, K.; Motoyama, Y.; Nagashima, H., “Monometallic and heterobimetallic azanickellacycles as ethylene polymerization catalysts.”, Chem. Commun., 10.1039/b502942b, 27, 3409-3411, 3409-3411, 2005.01.
82. Terasawa, J.; Kondo, H.; Matsumoto, T.; Kirchner, K.; Motoyama, Y.; Nagashima, H., “"Unsymmetrical" Diruthenium Amidinates in Which the 2-Amidinate Bridge Is Perpendicular to the Ru-Ru Axis: Synthesis and Reactions of Derivatives of [(5-C5Me5)Ru(-amidinate)Ru(5-C5H5)]+., Organometallics, 10.1021/om050091e, 24, 11, 2713-2721, 24, 2713-2721, 2005.01.
83. Niibayashi, S.; Mitsui, K.; Motoyama, Y.; Nagashima, H., “The effect of titanium alkoxides in the synthesis of heterobimetallic complexes by titanocene(III) alkoxides-induced metal-metal bond cleavage of metal carbonyl dimers”, J. Organomet. Chem., 10.1016/j.jorganchem.2004.09.075, 690, 2, 276-285, 690, 276-285, 2005.01.
84. Nagashima, H.; Itonaga, C.; Yasuhara, J.; Motoyama, Y.; Matsubara, K., “Silane-induced Polymerization of Vinyl Ethers Catalyzed by a Triruthenium Carbonyl Cluster, (-acenaphthylene)Ru3(CO)7”, Organometallics, 10.1021/om049499m, 23, 24, 5779-5786, 23, 5779-5786, 2004.01.
85. Tanabiki, M.; Tsuchiya, K.; Motoyama, Y.; Matsubara, K.; Nagashima, H., “Ni(II) Isocyanide Complexes as Ethylene Polymerization Catalysts”, Organometallics, 10.1021/om0498394, 23, 16, 3976-3981, 23, 3976-3981, 2004.01.
86. Motoyama, Y; Gondo, M; Masuda, S; Iwashita, Y; Nagashima, H,, “A cationic diruthenium amidinate, [(eta(5)-C5Me5)Ru(mu(2)-i-PrN=C(Me)Ni-Pr)Ru(eta(5)-C5Me5)](+), as an efficient catalyst for the atom-transfer radical reactions”,, CHEMISTRY LETTERS, 10.1246/cl.2004.442, 33, 4, 442-443, 33(4), 442-443, 2004.01.
87. Niibayashi, S; Matsubara, K; Haga, M; Nagashima, H,, “Thermally reversible photochemical haptotropic rearrangement of diiron carbonyl complexes bearing a bridging acenaphthylene or aceanthrylene ligand”, ORGANOMETALLICS, 10.1021/om034117i, 23, 4, 635-646, 23 (4), 635-646., 2004.01.
88. Niibayashi, S; Mitsui, K; Matsubara, K; Nagashima, H,, Novel titanium-cobalt complexes formed by reductive cleavage of a Co-Co bond in CO2(CO)(8) by titanocene tert-butoxides: Synthesis, characterization, and mechanistic aspects for metal-metal bond recombination”, ORGANOMETALLICS, 10.1021/om0340701, 22, 24, 4885-4892, 22(24), 4885-4892, 2003.01.
89. Sapunov, VN; Schmid, R; Kirchner, K; Nagashima, H, “The importance of interligand interactions to structure and reactivity of coordinatively unsaturated ruthenium and iron half-sandwich complexes - application of the TSC concept II”, COORDINATION CHEMISTRY REVIEWS, 10.1016/S0010-8545(02)00255-2, 238, 363-382, 238, 363-382, 2003.01.
90. Matsubara, K; Niibayashi, S; Nagashima, H, Thermally or photochemically induced reductive cleavage of metal-metal bonds of metal carbonyl dimers by a titanocene(III) tert-butoxide: Novel reversible access to heterobimetallic complexes”, ORGANOMETALLICS, 10.1021/om020869l, 22, 7, 1376-1382, 22(7), 1376-1382, 2003.01.
91. Nagashima, H; Gondo, M; Masuda, S; Kondo, H; Yamaguchi, Y; Matsubara, K, “Organoruthenium(II) and (III) amidinates, (eta-(5)-C5Me5)Ru(eta-amidinate) and (eta(5)-C5Me5)RuCl(eta-amidinate), as unique redox catalysts for the intramolecular Kharasch reactions: Facile access to a pyrrolizidine alkaloid skeleton under mild conditions”, CHEMICAL COMMUNICATIONS, 10.1039/b209369c, 3, 442-443, (3), 442-443, 2003.01.
92. Matsubara, K; Terasawa, J; Nagashima, H,, Silane-induced ring-opening polymerization of 1,1,3,3-tetramethyl-2oxa-1,3-disilacyclopentane catalyzed by a triruthenium cluster”, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 10.1016/S0022-328X(02)01816-8, 660, 2, 145-152, 660(2), 145-152., 2002.01.
93. Hayashida, T; Nagashima, H, Access to novel ruthenium-amidinate complexes, (eta(6)-arene)Ru(eta(2)-amidinate)X and [Ru(eta(2)-amidinate)(MeCN)(4)]+PF6- by photochemical displacement of the benzene ligand in (eta(6)-C6H6)Ru(eta(2)-amidinate)X”, ORGANOMETALLICS, 10.1021/om020227y, 21, 19, 3884-3888, 21(19), 3884-3888, 2002.01.
94. Matsubara, K; Ryu, K; Maki, T; Iura, T; Nagashima, H, “Oxidative addition of H-SiR3 to di- and triruthenium carbonyl complexes bearing a bridging azulene ligand: isolation of new silylruthenium complexes and catalytic hydrosilylation of ketones”, ORGANOMETALLICS, 10.1021/om0200050, 21, 14, 3023-3032, 21(14), 3023-3032, 2002.01.
95. Matsubara, K; Iura, T; Maki, T; Nagashima, H, “A triruthenium carbonyl cluster bearing a bridging acenaphthylene ligand: An efficient catalyst for reduction of esters, carboxylic acids, and amides by trialkylsilanes”, JOURNAL OF ORGANIC CHEMISTRY, 10.1021/jo025726n, 67, 14, 4985-4988, 67(14), 4985-4988, 2002.01.
96. Matsubara, K; Mima, S; Oda, T; Nagashima, H,, “Preparation, structures, and haptotropic rearrangement of novel dinuclear ruthenium complexes, (mu(2),eta(3):eta(5)-guaiazulene)Ru-2(CO)(4)(CNR)”, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 10.1016/S0022-328X(02)01187-7, 650, 1-2, 96-107, 650(1-2), 96-107, 2002.01.
97. Hamura, S; Oda, T; Shimizu, Y; Matsubara, K; Nagashima, H,, “"Bidentate" and "tridentate" sulfonamide ligands for titanium complexes: crystal structures and solution dynamics elucidating an eta(2) or eta(3)-coordination mode”,, JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 10.1039/b110481k, 7, 1521-1527, (7), 1521-1527, 2002.01.
98. Kondo, H; Matsubara, K; Nagashima, H,, Novel coordinatively unsaturated bimetallic complexes, [(eta(5)-C5Me5)Ru(mu(2)-(PrNC)-Pr-i(Me)=(NPr)-Pr-i)Ru(eta(5)-C5Me5)](+): A bridging amidinate ligand perpendicular to the metal-metal axis effectively stabilizes the highly reactive cationic diruthenium species”, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 10.1021/ja016899h, 124, 4, 534-535, 124(4), 534-535, 2002.01.
99. Hayashida, T; Nagashima, H, “Ruthenium amidinato-carbene complexes containing a Ru-Si bond: Formation and reversible alpha-silyl group migration from the metal to the carbene ligand”, ORGANOMETALLICS, 10.1021/om010775w, 20, 24, 4996-4998, 20(24), 4996-4998, 2001.01.
100. Kondo, H; Kageyama, A; Yamaguchi, Y; Haga, M; Kirchner, K; Nagashima, H, “Oxidative addition of allylic substrates to coordinatively unsaturated ruthenium compounds, [Ru(eta(5)-C5Me5)(eta-amidinate)]: Preparation, structure elucidation, and catalysis of novel ruthenium (IV)-eta(3)-allyl complexes”,, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 10.1246/bcsj.74.1927, 74, 10, 1927-1937, 74(10), 1927-1937, 2001.01.
101. Hayashida, T; Miyazaki, K; Yamaguchi, Y; Nagashima, H, Preparation and structure elucidation of novel organoruthenium amidinates bearing eta(4)-diene ligands”, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 10.1016/S0022-328X(01)01150-0, 634, 2, 167-176, 634(2), 167-176, 2001.01.
102. Hayashida, T; Yamaguchi, Y; Kirchner, K; Nagashima, H, “Isolable yet highly reactive cationic organoruthenium(II) amidinates, [Ru(eta(6)-C6R6)(eta-amidinate)]X-+(-), showing signs of coordinative unsaturation: Isoelectronic complexes of Ru(eta(5)-C5Me5)(eta-amidinate)”, CHEMISTRY LETTERS, 10, 954-955, (10), 954-955., 2001.01.
103. Matsubara, K; Oda, T; Nagashima, H,, “Diruthenium carbonyl complexes bound to guaiazulene: Preparation and thermally reversible photoisomerization studies of phosphine and phosphite derivatives of (mu(2),eta(3):(5)-quaiazulene)Ru-2(CO)(5) and iron homologues”, ORGANOMETALLICS, 10.1021/om000608g, 20, 5, 881-892, 20(5), 881-892, 2001.01.
104. Kondo, H; Yamaguchi, Y; Nagashima, H,, “(eta(5)-C5Me5)Ru(mu(2)-(PrN)-Pr-i=C(Me)(NPr)-Pr-i)Ru(X)(eta(5)-C5Me5): an unusual bonding mode of mu(2)-amidinate ligand providing the first unequivocal evidence for coordinating ability of pi-conjugate electrons of the amidinate ligands to transition metals”, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 10.1021/ja003250o, 123, 3, 500-501, 123(3), 500-501, 2001.01.
105. Nagashima, H; Isono, Y; Iwamatsu, S,, “Copper-catalyzed cyclization of N-allylhalodifluoroacetamides: An efficient synthesis of alpha,alpha-difluorinated gamma-lactams”, JOURNAL OF ORGANIC CHEMISTRY, 10.1021/jo001187f, 66, 1, 315-319, 66(1), 315-319, 2001.01.
106. Nagashima, H; Suzuki, A; Iura, T; Ryu, K; Matsubara, K, “Stoichiometric and catalytic activation of Si-H bonds by a triruthenium carbonyl cluster (mu(3),eta(2):eta(3):eta(5)-acenaphthylene)Ru-3(CO)(7): Isolation of the oxidative adducts, catalytic hydrosilylation of aldehydes, ketones, and acetals, and catalytic polymerization of cyclic ethers”, ORGANOMETALLICS, 10.1021/om0003887, 19, 18, 3579-3590, 19(18), 3579-3590, 2000.01.
107. Kondo, H; Yamaguchi, Y; Nagashima, H, “The first organoruthenium(IV) complexes containing nitrogen donor ligands by oxidative addition of allylic substrates to coordinatively unsaturated Ru(II) complexes”, CHEMICAL COMMUNICATIONS, 10.1039/b002927k, 12, 1075-1076, (12), 1075-1076, 2000.01.
108. Yamaguchi, Y; Nagashima, H, “(eta(5)-C5Me5)Ru(amidinate): Highly reactive ruthenium complexes formally bearing 16 valence electrons showing signs of coordinative unsaturation”, ORGANOMETALLICS, 10.1021/om990872d, 19, 5, 725-727, 19(5), 725-727, 2000.01.
109. Iwamatsu, S; Matsubara, K; Nagashima, H,, “Synthetic studies of cis-3a-aryloctahydroindole derivatives by copper-catalyzed cyclization of N-allyltrichloroacetamides: Facile construction of benzylic quaternary carbons by carbon-carbon bond-forming reactions”, JOURNAL OF ORGANIC CHEMISTRY, 10.1021/jo9912146, 64, 26, 9625-9631, 64(26), 9625-9631, 1999.01.
110. Nagashima, H; Hosoda, K; Abe, T; Iwamatsu, S; Sonoda, T, “Efficient photooxygenation of olefins by a C-60 derivative bearing an organofluorine tail”, CHEMISTRY LETTERS, 6, 469-470, (6), 469-470, 1999.01.
111. Nagashima, H; Suzuki, A; Kondo, H; Nobata, M; Aoki, K; Itoh, K, A tetraruthenium carbonyl cluster bearing indenyl-type ligand as the facial bonding mode”, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 10.1016/S0022-328X(98)01155-3, 580, 2, 239-244, 580(2), 239-244, 1999.01.
112. Iwamatsu, S; Kondo, H; Matsubara, K; Nagashima, H, “Copper-catalyzed facile carbon-carbon bond forming reactions at the alpha-position of alpha,alpha,gamma-trichlorinated gamma-lactams”, TETRAHEDRON, 55(6), 1687- 1706.
113. Nagashima, H; Suzuki, A; Nobata, M; Aoki, K; Itoh, K,, Multimetallic activation of molecular hydrogen, leading to hydrogenation of the coordinated azulenes in di-, tri-, and tetranuclear ruthenium carbonyl complexes”, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 10.1246/bcsj.71.2441, 71, 10, 2441-2448, 71(10), 2441-2448, 1998.01.
114. Nagashima, H; Suzuki, A; Nobata, M; Aoki, K; Itoh, K, “Carbon-hydrogen bond activation by triruthenium carbonyl species during carbon monoxide promoted elimination of 4,5-dihydroacenaphthylene from [(mu(2):eta(1):eta(5)-C12H10)Ru3H2(CO)(7)]: Implication of reaction intermediates”, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 10.1246/bcsj.70.2231, 70, 9, 2231-2237, 70(9), 2231- 2237, 1997.01.

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