Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Ryoichi Kuwano Last modified date:2018.06.21

Professor / Interdisciplinary Chemistry / Department of Chemistry / Faculty of Sciences


Papers
1. Yusuke Makida, Kazumi Usui, Satoshi Ueno, Ryoichi Kuwano, Palladium-catalyzed benzylic substitution of benzyl carbonates with phosphorus nucleophiles, Chemistry Letters, 10.1246/cl.170901, 46, 12, 1814-1817, 2017.01, A wide range of benzyl carbonates reacted with dimethyl phosphonate or diphenylphosphine oxide in the presence of the palladium catalyst, [Pd(η3-allyl)Cl]2DPEphos, to give dimethyl benzylphosphonates and benzyldiphenylphosphine oxides in high yields. The catalytic phosphonylation was applied to the one-pot synthesis of alkenes from the benzyl esters..
2. Yusuke Makida, Yasutaka Matsumoto, Ryoichi Kuwano, Palladium-Catalyzed Decarboxylation of Benzyl Fluorobenzoates, Synlett, 10.1055/s-0036-1588572, 28, 19, 2573-2576, 2017.12, The decarboxylation of benzyl fluorobenzoates has been developed by using the palladium catalyst prepared in situ from Pd(eta3-allyl)Cp and bulky monophosphine ligand XPhos. The catalytic reaction afforded a range of fluorinated diarylmethanes in good yields with broad functional-group compatibility. The substrates were readily synthesized by condensation of the corresponding benzoic acid with benzyl alcohol. Therefore, the transformation is formally regarded as a cross-coupling reaction between fluorine-containing benzoic acids and benzyl alcohols..
3. Yushu Jin, Yusuke Makida, Tatsuya Uchida, Ryoichi Kuwano, Ruthenium-catalyzed chemo-and enantioselective hydrogenation of isoquinoline carbocycles, Journal of Organic Chemistry, 10.1021/acs.joc.8b00190, 83, 7, 3829-3839, 2018.04, A chemoselective hydrogenation of isoquinoline carbocycles was achieved by using the catalyst prepared from Ru(methallyl)2(cod) and trans-chelate chiral ligand PhTRAP. The unique chemoselectivity achieved in this hydrogenation could be ascribed to the trans-chelation of the chiral ligand. The procedure for preparing the catalyst strongly affects the reproducibility of the carbocycle hydrogenation. Various 5-, 6-, 7-, and 8-substituted isoquinolines were selectively hydrogenated at their carbocycles to afford 5,6,7,8-tetrahydroisoquinolines as major products in high yields with moderate or good enantioselectivities. Some mechanistic studies suggested that the stereogenic center was created during the initial addition of H2 to the aromatic ring in the hydrogenation of 5-substituted isoquinolines. In other words, the stereochemical control was accompanied by the dearomatization..
4. Yusuke Makida, Masahiro Saita, Takahiro Kuramoto, Kentaro Ishizuka, Ryoichi Kuwano, Asymmetric Hydrogenation of Azaindoles: Chemo- and Enantioselective Reduction of Fused Aromatic Ring Systems Consisting of Two Heteroarenes, Angewandte Chemie International Edition, 10.1002/anie.201606083, 55, 39, 11859-11862, 2016.10, High enantioselectivity was achieved for the hydro- genation of azaindoles by using the chiral catalyst, which was prepared from [Ru(h3-methallyl)2(cod)] and a trans-chelating bis(phosphine) ligand (PhTRAP). The dearomative reaction exclusively occurred on the five-membered ring, thus giving the corresponding azaindolines with up to 97:3 enantiomer ratio..
5. Ryuhei Ikeda, Ryoichi Kuwano, Asymmetric Hydrogenation of Isoxazolium Triflates with a Chiral Iridium Catalyst, CHEMISTRY A EUROPEAN JOURNAL, 10.1002/chem.201600732, 22, 25, 8610-8618, 2016.06, The iridium catalyst [IrCl(cod)]2–phosphine–I2 (cod = 1,5-cyclooctadiene) selectively reduced isoxazolium triflates to isoxazolines or isoxazolidines in the presence of H2. The iridium-catalyzed hydrogenation proceeded in high-to-good enantioselectivity when an optically active phosphine–oxazoline ligand was used. The 3-substituted 5-arylisoxazolium salts were transformed into 4-isoxazolines with up to 95:5 enantiomeric ratio (e.r.). Chiral cis-isoxazolidines were obtained in up to 89:11 e.r., with no formation of their trans isomers, when the substrates had a primary alkyl substituent at the 5-position. The mechanistic studies indicate that the hydridoiridium(III) species prefers to deliver its hydride to the C5 atom of the isoxazole ring. The hydride attack leads to the formation of the chiral isoxazolidine via a 3-isoxazoline intermediate. Meanwhile, in the selective formation of 4-isoxazolines, hydride attack at the C5 atom may be obstructed by steric hindrance from the 5-aryl substituent..
6. Ryoichi Kuwano, Ryuhei Ikeda, Kazuki Hirasada, Catalytic asymmetric hydrogenation of quinoline carbocycles: unusual chemoselectivity in the hydrogenation of quinolines, CHEMICAL COMMUNICATIONS, 10.1039/c5cc01971k, 51, 35, 7558-7561, 2015.05.
7. Ryoichi Kuwano, Yuta Hashiguchi, Kentaro Ishizuka, Catalytic Asymmetric Hydrogenation of Pyrimidines, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 10.1002/anie.201410607, 54, 8, 2393-2396, 2015.02, 光学活性イリジウム錯体と希土類ルイス酸を組み合わせて用いることにより、芳香族複素環ピリミジンの高エナンチオ選択的な触媒的不斉水素化を実現した。本不斉触媒系を利用することにより、有用な生理活性化合物として期待できる光学活性環状ピリミジンが最高99% eeで得られる。.
8. Yushu Jin, Kentaro Ishizuka, Ryoichi Kuwano, An Improvement of the Palladium-Catalyzed [4+2] Cycloaddition of o-(Silylmethyl)benzyl Carbonates with Alkenes, SYNLETT, 10.1055/s-0034-1379014, 25, 17, 2488-2492, 2014.10.
9. Manabu Nakazono, Obayashi Konen, Yuji Oshikawa, Kazushi Tani, Genki Suenaga, Yukio Ando, Shinkoh Nanbu, Ryoichi Kuwano, Unsymmetric indolylmaleimides: Synthesis, photophysical properties and amyloid detection, JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 10.1016/j.jphotochem.2014.04.027, 289, 39-46, 2014.09.
10. Satoshi Ueno, Ryohei Maeda, Shohei Yasuoka, Ryoichi Kuwano, beta-Amination of Saturated Nitriles through Palladium-catalyzed Dehydrogenation, 1,4-Addition, and Re-dehydrogenation, Chem. Lett., 10.1246/cl.2013.40, 42, 1, 40-42, 2013.01.
11. Satoshi Ueno, Ryosuke Shimizu, Ryohei Maeda, Ryoichi Kuwano, Synthesis of 4-Quinolones through Nickel-Catalyzed Intramolecular Amination on the β-Carbon of o-(N-Alkylamino)propiophenones, Synlett, 10.1055/s-0031-1291146, 23, 11, 1639-1642, 2012.07.
12. Ryuhei Ikeda, Ryoichi Kuwano, Catalytic Asymmetric Hydrogenation of 3-Substituted Benzisoxazoles, Molecules, 10.3390/molecules17066901, 17, 6, 6901-6915, 2012.06.
13. Ryoichi Kuwano, Ryuichi Morioka, Manabu Kashiwabara, Nao Kameyama, Catalytic Asymmetric Hydrogenation of Naphthalenes, Angew. Chem. Int. Ed., 10.1002/anie.201201153, 51, 17, 4136-4139, 2012.04, 炭素原子のみで構成される芳香環であるナフタレンの高エナンチオ選択的な触媒的不斉水素化の開発に世界で初めて成功した。不斉配位子PhTRAPのルテニウム錯体を触媒として用いることによって、最高で92% eeの水素化生成物が得られる。このような官能基の触媒的不斉水素化はこれまでに報告がなかった。.
14. Satoshi Ueno, Komiya Sadakazu, Takeshi Tanaka, Ryoichi Kuwano, Intramolecular S-N '-Type Aromatic Substitution of Benzylic Carbonates at their Para-Position, Org. Lett., 10.1021/ol203089k, 14, 1, 338-341, 2012.01.
15. Ryoichi Kuwano, Ryosuke Shimizu, An Improvement of Nickel Catalyst for Cross-coupling Reaction of Arylboronic Acids with Aryl Carbonates by Using a Ferrocenyl Bisphosphine Ligand, Chem. Lett., 10.1246/cl.2011.913, 40, 9, 913-915, 2011.09.
16. Satoshi Ueno, Kazumi Usui, Ryoichi Kuwano, Transformation of alpha-Substituted Propanols into gamma-Amino Alcohols through Nickel-Catalyzed Amination on the Terminal gamma-Carbon of Propanols, Synlett, 10.1055/s-0030-1260536, 9, 1303-1307, 2011.06.
17. Ryoichi Kuwano, Nao Kameyama, Ryuhei Ikeda, Catalytic Asymmetric Hydrogenation of N-Boc-Imidazoles and Oxazoles, J. Am. Chem. Soc., 10.1021/ja201543h, 133, 19, 7312-7315, 2011.05, 芳香族化合物であるイミダゾールおよびオキサゾールの高エナンチオ選択的な触媒的不斉水素化の開発に成功した。不斉配位子PhTRAPのルテニウム錯体を触媒として用いることによって、最高で99% eeの水素化生成物が得られる。この反応によって生成する光学活性イミダゾリン、オキサゾリンは、加水分解等によって、生理活性化合物やキラル補助基として有用な光学活性1,2-ジアミンやβ-アミノアルコールに変換できる。.
18. Satoshi Ueno, Masakazu Ohtsubo, Ryoichi Kuwano, Palladium-Catalyzed [4 + 2] Cycloaddition of o-(Silylmethyl)benzyl Esters with Ketones: An Equivalent to Oxo-Diels-Alder Reaction of o-Xylylenes, Org. Lett., 10.1021/ol101792a, 12, 19, 4332-4334, 2010.10.
19. Manabu Nakazono, Ai Jinguji, Shinkoh Nanbu, Ryoichi Kuwano, Zilong Zheng, Kenichiro Saita, Yuji Oshikawa, Yuta Mikuni, Tatsuhiro Murakami, Yi Zhao, Shigeki Sasaki, Kiyoshi Zaitsu, Fluorescence and chemiluminescence properties of indolylmaleimides: experimental and theoretical studies, Phys. Chem. Chem. Phys., 10.1039/C003021J, 12, 33, 9783-9793, 2010.09.
20. Jung-Yi Yu, Ryosuke Shimizu, Ryoichi Kuwano, Selective cine Substitution of 1-Arylethenyl Acetates with Arylboron Reagents and a Diene/Rhodium Catalyst, Angew. Chem. Int. Ed., 10.1002/anie.201002745, 49, 36, 6396-6399, 2010.08, 通常のクロスカカップリング反応では、互いの基質の脱離基が結合している炭素上で結合が形成される。しかし、ジエンの配位したロジウム錯体を触媒として用いると、脱離基からみてβ位の炭素上で結合形成がおこることを見出した。.
21. Ryoichi Kuwano, Yasuhiro Matsumoto, Takenori Shige, Takeshi Tanaka, Shinichi Soga, Yasuaki Hanasaki, Palladium-Catalyzed N-Arylation of Bis(ortho-substituted aryl)amines: an Efficient Method for Preparing Sterically Congested Triarylamines, Synlett, 10.1055/s-0030-1258125, 12, 1819-1824, 2010.07.
22. Satoshi Ueno, Masakazu Ohtsubo, Ryoichi Kuwano, [4+2] Cycloaddition of o-Xylylenes with Imines Using Palladium Catalyst, J. Am. Chem. Soc., 10.1021/ja905988e, 131, 36, 12904–12905, 2009.09.
23. Jung-Yi Yu, Ryoichi Kuwano, Rhodium-Catalyzed Cross-Coupling of Organoboron Compounds with Vinyl Acetate, Angew. Chem. Int. Ed., 10.1002/anie.200903146, 48, 39, 7217–7220, 2009.09.
24. Satoshi Ueno, Ryosuke Shimizu, Ryoichi Kuwano, Nickel-Catalyzed Formation of a Carbon-Nitrogen Bond at the beta-Position of Saturated Ketones, Angew. Chem. Int. Ed., 10.1002/anie.200900892, 48, 25, 4543–4545, 2009.06.
25. Masato Ohsumi, Ryoichi Kuwano, Palladium-catalyzed Cross-coupling of Benzylic Carbonates with Organostannanes, Chem. Lett., 37 (7), 796-797, 2008.07.
26. Ryoichi Kuwano, Hiroki Kusano, Benzyl Protection of Phenols under Neutral Conditions: Palladium-Catalyzed Benzylations of Phenols., Org. Lett., 10 (10), 1979-1982, 2008.04.
27. Jung-Yi Yu, Ryoichi Kuwano, Suzuki-Miyaura Coupling of Diarylmethyl Carbonates with Arylboronic Acids: A New Access to Triarylmethanes., Org. Lett., 10 (5), 973-976, 2008.02.
28. Ryoichi Kuwano, Jung-Yi Yu, Suzuki-Miyaura Coupling of Benzylic Carbonates with Heteroarylboronic Acids., Heterocycles, 74 (1), 233-237, 2008.02.
29. Ryoichi Kuwano, Manabu Kashiwabara, Masato Ohsumi, Hiroki Kusano, Catalytic Asymmetric Hydrogenation of 2,3,5-Trisubstituted Pyrroles., J. Am. Chem. Soc., 130, 3, 808-809, 2008.01.
30. Manabu Nakazono, Shinkoh Nanbu, Akihiro Uesaki, Ryoichi Kuwano, Manabu Kashiwabara, Kiyoshi Zaitsu, Bisindolylmaleimides with Large Stokes Shift and Long-Lasting Chemiluminescence Properties., Org. Lett., 9 (18), 3583-3586, 2007.08.
31. Masashi Yokogi, Ryoichi Kuwano, Use of Acetate as a Leaving Group in Palladium-Catalyzed Nucleophilic Substitution of Benzylic Esters., Tetrahedron Lett., 48 (35), 6109-6112, 2007.08.
32. Ryoichi Kuwano, Hiroki Kusano, Palladium-catalyzed Nucleophilic Substitution of Diarylmethyl Carbonates with Malonate Carbanions, Chem. Lett., 36 (4), 528-529, 2007.04.
33. Ryoichi Kuwano, Takenori Shige, Palladium-Catalyzed Formal [4+2] Cycloaddtion of o-Xylylenes with Olefins, J. Am. Chem. Soc., 129, 13, 3802-3803, 2007.04.
34. Ryoichi Kuwano, Manabu Kashiwabara, Ruthenium-Catalyzed Asymmetric Hydrogenation of N-Boc-Indoles, Org. Lett., 8 (12), 2653-2655, 2006.06.
35. Ryoichi Kuwano, Manabu Kashiwabara, Koji Sato, Takashi Ito, Kohei Kaneda, Yoshihiko Ito, Catalytic Asymmetric Hydrogenation of Indoles Using a Rhodium Complex with a Chiral Bisphosphine Ligand PhTRAP., Tetrahedron: Asymmetry, 17 (4), 521-535, 2006.02.
36. Ryoichi Kuwano, Masashi Yokogi, Cross-Coupling of Benzylic Acetates with Arylboronic Acids: One-Pot Transformation of Benzylic Alcohols to Diarylmethanes, Chem. Commun., 10.1039/B513372F, 47, 5899-5901, (47), 5899-5901, 2005.12.
37. Ryoichi Kuwano, Naoki Ishida, Masahiro Murakami, Asymmetric Carroll Rearrangement of Allyl alpha-Acetamido-beta-ketocarboxylates Catalysed by a Chiral Palladium Complex, Chem. Commun., (31), 3951-3952, 2005.08.
38. Ryoichi Kuwano, Yutaka Kondo, Tsuyoshi Shirahama, Transformation of Carbonates into Sulfones at the Benzylic Position via Palladium-Catalyzed Benzylic Substitution, Org. Lett., 10.1021/ol0509787, 7, 14, 2973-2975, 7 (14), 2973-2975, 2005.07.
39. Ryoichi Kuwano, Takenori Shige, Potassium Fluoride-induced 1,4-Elimination of o-[(Trimethylsilyl)methyl]benzyl Acetates: A Versatile Generation of o-Quinodimethanes, Chem. Lett., 10.1246/cl.2005.728, 34, 5, 728-729, 34 (5), 728-729, 2005.05.
40. Ryoichi Kuwano, Masashi Yokogi, Suzuki-Miyaura Cross-Coupling of Benzylic Carbonates with Arylboronic Acids, Org. Lett., 10.1021/ol050078q, 7, 5, 945-947, 7 (5), 945-947, 2005.03.
41. Ryoichi Kuwano, Yutaka Kondo, Palladium-Catalyzed Benzylation of Active Methine Compounds without Additional Base: Remarkable Effect of 1,5-Cyclooctadiene., Org. Lett., 10.1021/ol048540e, 6, 20, 3545-3547, 6, 3545-3547, 2004.09.
42. Ryoichi Kuwano, Takashi Uemura, Makoto Saitoh, Yoshihiko Ito, Y., Trans-Chelating Bisphosphine Possessing Only Planar Chirality and its Application to Catalytic Asymmetric Reactions, Tetrahedron: Asymmetry, 15, 2263-2271, 2004.07.
43. Ryoichi Kuwano, Kohei Kaneda, Takashi Ito, Koji Sato, Takashi Kurokawa, Yoshihiko Ito, Highly Enantioselective Synthesis of Chiral 3-Substituted Indolines by Catalytic Asymmetric Hydrogenation of Indoles, Org. Lett., 10.1021/ol049317k, 6, 13, 2213-2215, 6, 2213-2215, 2004.06.
44. Ryoichi Kuwano, Yutaka Kondo, Yosuke Matsuyama, Palladium-Catalyzed Nucleophilic Benzylic Substitutions of Benzylic Esters., J. Am. Chem. Soc., 10.1021/ja037735z, 125, 40, 12104-12105, 2003.10.
45. Ryoichi Kuwano, Kei-ichi Uchida, Yoshihiko Ito, Asymmetric Allylation of Unsymmetrical 1,3-Diketones Using BINAP-Palladium Catalyst., Org. Lett., 10.1021/ol034665s, 5, 12, 2177-2179, 5, 2177-2179., 2003.06.
46. Masaru Utsunomiya, Ryoichi Kuwano, Motoi Kawatsura, John F. Hartwig, Rhodium-Catalyzed Anti-Markovnikov Hydroamination of Vinylarenes., J. Am. Chem. Soc., 125, 5608-5609, 2003.05.
47. James P. Stambuli, Ryoichi Kuwano, John F. Hartwig, Unparalleled Rates for the Activation of Aryl Chlorides and Bromides: Coupling with Amines and Boronic Acids in Minutes at Room Temperature., Angew. Chem. Int. Ed., 41, 4746-4748, 2002.12.
48. Ryoichi Kuwano, Masaru Utsunomiya, John F. Hartwig, Aqueous Hydroxide as a Base for Palladium Catalyzed Amination of Aryl Chlorides and Bromides., J. Org. Chem., 67, 6479-6486., 2002.08.
49. Ryoichi Kuwano, Masaya Sawamura, Yoshihiko Ito, Catalytic Asymmetric Hydrogenation of alpha-(Acetamido)acrylates Using TRAP Trans-Chelating Chiral Bisphosphine Ligands: Remarkable Effects of Ligand P-Substituent and Hydrogen Pressure on Enantioselectivity., Bull. Chem. Soc. Jpn., 73, 2571-2578, 2000.11.
50. Ryoichi Kuwano, Koji Sato, Takashi Kurokawa, Daisuke Karube, Yoshihiko Ito, Catalytic Asymmetric Hydrogenation of Heteroaromatic Compounds, Indoles., J. Am. Chem. Soc., 122, 31, 7614-7615, 2000.08.
51. Ryoichi Kuwano, Hiroshi Miyazaki, Yoshihiko Ito, Asymmetric Aldol Reaction of 2-Cyanopropionates Catalyzed by a Trans-Chelating Chiral Diphosphine-Rhodium(I) Complex: Highly Enantioselective Construction of Quaternary Chiral Carbon Centers at alpha-Positions of Nitriles., J. Organomet. Chem., 2000.05.
52. Ryoichi Kuwano, Koji Sato, Yoshihiko Ito, Hydrogenation of Five-Membered Heteroaromatic Compounds Catalyzed by a Rhodium-Phosphine Complex., Chem. Lett., 428-429, 2000.04.
53. Ryoichi Kuwano, Masaya Sawamura, Junya Shirai, Masatoshi Takahashi, Yoshihiko Ito, Asymmetric Hydrosilylation of Ketones Using Trans-Chelating Chiral Bisphosphine Ligands Bearing Primary Alkyl Substituents on Phosphorus Atoms., Bull. Chem. Soc. Jpn., 73, 485-496., 2000.02.
54. Ryoichi Kuwano, Daisuke Karube, Yoshihiko Ito, Catalytic Asymmetric Hydrogenation of 1-Aza-2-cycloalkene-2-carboxylates Catalyzed by a Trans-Chelating Chiral Diphosphine PhTRAP-Rhodium Complex., Tetrahedron Lett., 40, 9045-9049., 1999.12.
55. Ryoichi Kuwano, Ryo Nishio, Yoshihiko Ito, Enantioselective Construction of Quaternary alpha-Carbon Centers on alpha-Amino Phosphonates via Catalytic Asymmetric Allylation., Org. Lett., 1, 837-839, 1999.09.
56. Ryoichi Kuwano, Yoshihiko Ito, Catalytic Asymmetric Allylation of Prochiral Nucleophiles, alpha-Acetamido-beta-ketoesters., J. Am. Chem. Soc., 121, 3236-3237., 1999.04.
57. Ryoichi Kuwano, Yoshihiko Ito, Asymmetric Hydrogenation of 1,4,5,6-Tetrahydropyrazine-2-(N-tert-butyl)carboxamide Catalyzed by Trans-Chelating Chiral Diphosphine-Rhodium Complexes., J. Org. Chem., 64, 1232-1237., 1999.02.
58. Ryoichi Kuwano, Takashi Uemura, Makoto Saitoh, Yoshihiko Ito, Synthesis of Trans-Chelating Chiral Diphosphine Ligand with Only Planar Chirality and Their Application to Asymmetric Hydrosilylation of Ketones, Tetrahedron Lett., 40, 1327-1330., 1999.02.
59. Ryoichi Kuwano, Satoshi Okuda, Yoshihiko Ito, Asymmetric Hydrogenation of (E)-alpha,beta-Bis(N-acylamino)acrylates Catalyzed by a Rhodium Complex with Trans-Chelating Chiral Diphosphine Ligand., Tetrahedron: Asymmetry, 9, 2773-2775, 1998.08.
60. Ryoichi Kuwano, Satoshi Okuda, Yoshihiko Ito, Catalytic Asymmetric Synthesis of beta-Hydroxy-alpha-amino Acids: Highly Enantioselective Hydrogenation of beta-Oxy-alpha-acetamidoacrylates., J. Org. Chem., 63, 3499-3503., 1998.05.
61. Ryoichi Kuwano, Masatoshi Takahashi, Yoshihiko Ito, Reduction of Amides to Amines via Catalytic Hydrosilylation by a Rhodium Complex., Tetrahedron Lett., 39, 1017-1020, 1998.02.
62. Ryoichi Kuwano, Hiroshi Miyazaki, Yoshihiko Ito, Asymmetric Aldol Reaction of 2-Cyanopropionates Catalysed by Trans-Chelating Chiral Diphosphine Ligand TRAP-Rhodium Complex., Chem. Commun., 71-72., 1998.01.
63. Andreas Goeke, Masaya Sawamura, Ryoichi Kuwano, Yoshihiko Ito, Enantioselective Cycloisomerization of 1,6-Enynes Catalyzed by Chiral Phosphane-Palladium Complexes., Angew. Chem. Int. Ed. Engl., 35 (6), 662?663, 1996.03.
64. Masaya Sawamura, Hitoshi Hamashima, Masanobu Sugawara, Ryoichi Kuwano, Yoshihiko Ito, Synthesis and Structures of Trans-Chelating Chiral Diphosphine Ligands Bearing Aromatic P-Substituents, (S,S)-(R,R)- and (R,R)-(S,S)-2,2"-Bis[1-(diarylphosphino)ethyl]-1,1"-biferrocenes (ArylTRAPs), and Their Transition Metal Complexes., Organometallics, 14 (10), 4549-4558, 1995.10.
65. Masaya Sawamura, Ryoichi Kuwano, Yoshihiko Ito, Enantioselective Hydrogenation of beta-Disubstituted alpha-Acetamidoacrylates Catalyzed by Rhodium Complexes with TRAP Trans-Chelating Chiral Phosphine Ligands., J. Am. Chem. Soc., 117 (37), 9602-9603., 1995.09.
66. Masaya Sawamura, Ryoichi Kuwano, Yoshihiko Ito, Trans-Chelating Chiral Diphosphane Ligands Bearing Flexible P-Alkyl Substituents (AlkylTRAPs) and their Application to the Rhodium-Catalyzed Asymmetric Hydrosilylation of Simple Ketones., Angew. Chem. Int. Ed. Engl., 33 (1), 111-113., 1994.01.