Presentations -

Development of New Chiral 2,2’-Bipyridine Ligands Bearing Prolinol Moieties

Akari Kimura, Ryosuke Tsutsumi, Masahiro Yamanaka

The 99th Annual Meeting of Chemical Society of Japan (兵庫県) , 

2019.03

, 

Poster presentation

Enantioselective Three-Component Coupling Reaction of α-Ketoesters, Phosphite, and Aldehydes Using Zinc Bisamidinate Catalyst

Tomoaki Takatoku, Ryousuke Tsutsumi, Masahiro Yamanaka

The 99th Annual Meeting of Chemical Society of Japan (兵庫県) , 

2019.03

, 

Poster presentation

Development of Metal-Bisamidine Catalyzed Asymmetric Vinylogous Mukaiyama Aldol Reaction of α-Ketoesters

Tomomi Kurita, Ryosuke Tsutsumi, Masahiro Yamanaka

The 99th Annual Meeting of Chemical Society of Japan (兵庫県) , 

2019.03

, 

Oral presentation (general)

CD and CPL Characteristics of Hydrogen-Bonding Complexes Consisting of Chiral Diamines and Achiral Dyes

Taku Isogai, Yaoki Kansaku, Ryosuke Tsutsumi, Masahiro Yamanaka

The 99th Annual Meeting of Chemical Society of Japan (兵庫県) , 

2019.03

, 

Poster presentation

Control of Chiral Space in Zinc Bisamidinate Catalyzed Asymmetric Addition of Et2Zn to α-Ketoesters

Tomomi Kurita, Ryosuke Tsutsumi, Masahiro Yamanaka

The 98th CSJ Annual Meeting, 

2018.03

, 

Poster presentation

アミジニウム-カルボキシレート塩橋に基づく新規超分子不斉触媒の開発

Chikashi, Yazaki, Ryosuke, Tsutsumi, Masahiro, Yamanaka

The 98th CSJ Annual Meeting, 

2018.03

, 

Poster presentation

Development of new chiral 2,2’-bipyridine ligands bearing corboxamide groups

Akari Kimura, Ryosuke Tsutsumi, Masahiro Yamanaka

The 98th CSJ Annual Meeting, 

2018.03

, 

Poster presentation

Catalytic Asymmetric Oxidation of N-Sulfonylimines Using Hydrogen Peroxide

TSUTSUMI, Ryosuke, URAGUCHI, Daisuke, OOI, Takashi

The 93th Annual Meeting of the Chemical Society of Japan (Shiga) , 

2013.03

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Oral presentation (general), The Chemical Society of Japan

Late-Stage Activation Strategy for Asymmetric Oxidation with Hydrogen Peroxide: Application to the Synthesis of Chiral Oxaziridine

Ryosuke Tsutsumi, Daisuke Uraguchi, Takashi Ooi

Japan-USA Organocatalytic Symposium in Hawaii (2012), 

2012.12

, 

Poster presentation

Catalytic Enantioselective Oxidation of N-Sulfonyl Imines Using Hydrogen Peroxide

Ryosuke Tsutsumi, Daisuke Uraguchi, Takashi Ooi

The Twelfth International Kyoto Conference on New Aspects of Organic Chemistry (IKCOC-12) (Kyoto) , 

2012.11

, 

Poster presentation

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An asymmetric oxidation of N-sulfonylimines using hydrogen peroxide as a terminal oxidant catalyzed by a chiral triaminoiminophosphorane was reported. The reaction smoothly proceeds by adding stoichiometric amount of trichloroacetonitrile.

Synthesis of proposed partial structure of BSX-1, a new marine polycyclic ether from a dinoflagellate Karenia brevisulcata

TSUTSUMI, Ryosuke, SATAKE, Masayuki, TACHIBANA, Kazuo

The 91th Annual Meeting of the Chemical Society of Japan (Kanagawa) , 

2011.03

, 

Oral presentation (general), The Chemical Society of Japan

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BSX-1 is a new polycyclic ether isolated from a dinoflagellate Karenia brevisulcata, a causative species of red tide occurred in Wellington Harbour, New Zealand in 1998.
The partial structure model was synthesized to confirm the proposed structure.

生物活性解明を目指した海産環状エーテルブレビサミドの合成

堤亮祐, 倉永健史, 白井智大, 伊藤恵美子, 佐竹真幸, Jeffrey L. C. Wright, 橘和夫

日本ケミカルバイオロジー学会 第5回年会 (神奈川) , 

2010.05

, 

Poster presentation, 日本ケミカルバイオロジー学会

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渦鞭毛藻Karenia brevisより単離された天然物ブレビサミドの合成を行い、合成標品の活性を評価した。発表内容のうち、私は側鎖部分の合成を除く合成全体を担当した。

Synthesis of Brevisamide, a Marine Monocyclic Ether Amide from a Dinoflagellate Karenia brevis

○Ryosuke Tsutsumi, Takefumi Kuranaga, Tomohiro Shirai, Emiko Ito, Masayuki Satake, Jeffrey L. C. Wright, Kazuo Tachibana

5th Annual Meeting of Japanese Society for Chemical Biology (Kanagawa, Japan) , 

2010.05

, 

Poster presentation, Japanese Society for Chemical Biology

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A natural product brevisamide from a dinoflagellate Karenia brevis was synthesized, and its bioactivity was evaluated. I contributed to whole of the synthesis except for the synthesis of the side chain fragment.

The Improved Synthesis of brevisamide, a Marine Monocyclic Ether Amide

○Ryosuke Tsutsumi, Takefumi Kuranaga, Tomohiro Shirai, Jeffrey L. C. Wright, Masayuki Satake, Kazuo Tachibana

The 59th Symposium of The Society of Synthetic Organic Chemistry, Japan (Kanto Region) (Tokyo, Japan) , 

2010.05

, 

Symposium, workshop panel (public), The Society of Synthetic Organic Chemistry, Japan (Kanto Region)

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A natural product brevisamide from a dinoflagellate Karenia brevis was synthesized, and its bioactivity was evaluated. I contributed to whole of the research except for the bioactivity test.

海産環状エーテルアミド天然物ブレビサミドの改良合成

堤亮祐, 倉永健史, 白井智大, Jeffrey L. C. Wright, 佐竹真幸, 橘和夫

第59回 有機合成化学協会関東支部シンポジウム (東京) , 

2010.05

, 

Symposium, workshop panel (public), 有機合成化学協会関東支部

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渦鞭毛藻Karenia brevisより単離された天然物ブレビサミドの合成を行い、合成標品の活性を評価した。

海産環状エーテルアミド, ブレビサミドの改良合成

堤 亮祐, 倉永 健史, 白井 智大, 佐竹 真幸, WRIGHT, Jeffrey L. C, 橘 和夫

日本化学会第90春季年会 (大阪) , 

2010.03

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Oral presentation (general), 日本化学会

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渦鞭毛藻Karenia brevisより単離された天然物ブレビサミドの合成を行い、合成標品の活性を評価した。発表内容のうち、私は生物活性試験以外の全体、すなわち合成全体を担当した。

Improved Synthesis of brevisamide, a Marine Monocyclic Ether Amide from a Dinoflagellate Karenia brevis

○TSUTSUMI, Ryosuke, KURANAGA, Takefumi, SHIRAI, Tomohiro, SATAKE, Masayuki, WRIGHT, Jeffrey L. C, TACHIBANA, Kazuo

The 90th Annual Meeting of The Chemical Society of Japan (Osaka, Japan) , 

2010.03

, 

Oral presentation (general), The Chemical Society of Japan

　View Summary

A natural product brevisamide from a dinoflagellate Karenia brevis was synthesized, and its bioactivity was evaluated. I contributed to whole of the research except for the bioactivity test.