論文 - 関　　千草

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  1. Catalytic efficiency of primary β-amino alcohols and primary α-amino amides in enantioselective reactions of isatins

    Ummareddy Venkata Subba Reddy, Bheemreddy Anusha, Marri Naveen Kumar, Raveendra Babu Kothapalli, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，Tetrahedron，162巻，(頁 134124 ～ )，2024年06月

  2. Characterization of Ralstonia insidiosa C1 isolated from Alpine regions: Capability in polyhydroxyalkanoates degradation and production

    Young-Cheol Chang, M. Venkateswar Reddy, Hinako Suzuki, Takumi Terayama, Yasuteru Mawatari, Chigusa Seki, Omprakash Sarkar，Journal of Hazardous Materials，471巻，(頁 134348 ～ )，2024年04月

  3. New boro amino amide organocatalysts for asymmetric cross aldol reaction of ketones with carbonyl compounds

    Zubeda Begum, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita and Hiroto Nakano，RSC Advances，13巻，2号，(頁 888 ～ 894)，2023年01月

  4. Thiourea fused g-amino alcohol organocatalysts for asymmetric Mannich reaction of b-keto active methylene compounds with imines

    Miku Nomura, Zubeda Begum, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita and Hiroto Nakano，RSC Advances，2023巻，13号，(頁 3715 ～ 3722)，2023年01月

  5. Catalytic Efficiency of Primary α-Amino Amides as Multifunctional Organocatalysts in Recent Asymmetric Organic Transformations

    Ummareddy Venkata Subba Reddy, Bheemreddy Anusha, Zubeda Begum, Chigusa Seki, Yuko Okuyama, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita and Hiroto Nakano，catalysts，12巻，12号，(頁 1674 ～ 1705)，2022年10月

  6. Chemical analysis of amyloid β aggregation inhibitors derived from Geranium thunbergii

    Kenji Kubo, Hikaru Watanabe, Hiroyuki Kumeta, Tomoyasu Aizawa, Chigusa Seki, Hiroto Nakano, Kiyotaka Tokuraku, Koji Uwai，BIOORGANIC & MEDICINAL CHEMISTRY，68巻，(頁 116840 ～ )，2022年05月

  7. New small gamma-turn type N-primary amino terminal tripeptide organocatalyst for solvent-free asymmetric aldol reaction of various ketones with aldehydes

    Rajkumar Thiyagarajan, Zubeda Begum, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，RSC Advances，11巻，61号，(頁 38925 ～ 38932)，2021年12月

  8. Simple amino silyl ether organocatalyst for asymmetric hetero Diels–Alder reaction of isatins with enones

    Perumalsamy Parasuraman, Divakar Ganesan, Zubeda Begum, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，CHIRALITY，33巻，8号，(頁 454 ～ 464)，2021年08月

  9. Simple primary β-amino alcohols as organocatalysts for the asymmetric Michael addition of β-keto esters to nitroalkenes

    Zubeda Begum, Haruka Sannabe, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita and Hiroto Nakano，RSC Advances，1巻，(頁 203 ～ 209)，2020年12月

  10. Simple organocatalyst component system for asymmetric hetero Diels–Alder reaction of isatins with enones

    Perumalsamy Parasuraman, Zubeda Begum, Madhu Chennapuram, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita and Hiroto Nakano,，RSC Advances，10巻，(頁 17486 ～ 17491)，2020年05月

  11. Sugar Based γ-Amino Alcohol Organocatalyst for Asymmetric Michael Addition of β-Keto Esters with Nitroolefins

    Divakar Ganesan, Madhu Chennapuram, Zubeda Begum, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita, and Hiroto Nakano，Heterocycles，98巻，11号，(頁 1536 ～ 1545)，2019年11月

  12. 2-Azanorbornane-based amino alcohol organocatalyst for asymmetric Michael reaction of beta-keto esters with nitroolefins

    Rei Togashi, Madhu Chennapuram, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，European Journal of Organic Chemistry，2019巻，24号，(頁 3882 ～ 3889)，2019年05月

  13. Amino Amide Organocatalysts for Asymmetric Michael Addition of β-Keto Esters with β-Nitroolefins

    Isiaka A. Owolabi, Madhu Chennapuram, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，Bulletin of the chemical society of Japan，92巻，3号，(頁 696 ～ 701)，2019年01月

  14. New Hybrid-type Squaramide-Fused Amino Alcohol Organocatalyst for Enantioselective Domino Michael Addition/Cyclization Reaction of Oxoindolines with Cyclic 1,3-Diketones

    Madhu Chennapuram, Isiaka Alade Owolabi, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Mitsuhiro Takeshita, and Hiroto Nakano，ACS Omega，3巻，9号，(頁 11718 ～ 11726)，2018年09月

  15. A new type of amino amide organocatalyzed enantioselective crossed aldol reaction of ketones with aromatic aldehydes

    Isiaka A. Owolabi, U.V. Subba Reddy, Madhu Chennapuram, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，Tetrahedron，74巻，36号，(頁 4705 ～ 4711)，2018年09月

  16. β-Amino Alcohol Organocatalysts for Asymmetric Additions

    Hiroto Nakano, Isiaka Alade Owolabi, Madhu Chennapuram, Yuko Okuyama, Eunsang Kwon, Chigusa Seki, Michio Tokiwa, and Mitsuhiro Takeshita，Heterocycles，97巻，2号，(頁 647 ～ 667)，2018年06月

  17. Structure-activity relations of rosmarinic acid derivatives for the amyloid b aggregation inhibition and antioxidant properties

    Riho Taguch, Koki Hatayama, Tomohito Takahashi, Takafumi Hayashi, Yuki Sato, Daisuke Sato, Kiminori Ohta, Hiroto Nakano, Chigusa Seki, Yasuyuki Endo, Kiyotaka Tokuraku, Koji Uwai，European Journal of Medicinal Chemistry，138巻，(頁 1066 ～ 1075)，2017年09月

  18. Hybrid-Type Squaramide-Fused Amino Alcohol Organocatalysts for Enantioselective Diels–Alder Reactions of 3-Hydroxy-2-Pyridones with Maleimides

    Madhu Chennapuram, U. V. Subba Reddy, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Mitsuhiro Takeshita and Hiroto Nakano，European Journal of Organic Chemistry，2017巻，(頁 4633 ～ 4641)，2017年08月

  19. A Diamino Alcohol Catalyzed Enantioselective Crossed Aldol Reaction of Acetaldehyde with Isatins – A Concise Total Synthesis of Antitumor Agents

    U. V. Subba Reddy, Madhu Chennapuram, Kento Seki, Chigusa Seki, Bheemreddy Anusha, Eunsang Kwon, Yuko Okuyama, Koji Uwai, Michio Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，European Journal of Organic Chemistry，2017巻，(頁 3847 ～ 3885)，2017年07月

  20. Hybrid-Type Squaramide-Fused Amino Alcohol Organocatalysts for Enantioselective Nitro-Aldol Reaction of Nitromethane with Isatins

    Madhu Chennapuram, U. V. Subba Reddy, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Mitsuhiro Takeshita and Hiroto Nakan，European Journal of Organic Chemistry，2017巻，(頁 1638 ～ 1646)，2017年03月

  21. Simple primary β-amino alcohol catalyzed enantioselective Diels-Alder reaction of 3-hydroxy-2-pyridones

    Toshihisa Takahashi, U.V. Subba Reddy, Yoshihito Kohari, Chigusa Seki, Taniyuki Furuyama, Nagao Kobayashi, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，Tetrahedron Letters，57巻，51号，(頁 5771 ～ 5776)，2016年12月

  22. 2-Azanorbornane-based amine organocatalyst for enantioselective aldol reaction of isatins with ketones

    Ayumi Ogasawara, U.V. Subba Reddy, Chigusa Seki, Yuko Okuyama, Koji Uwai, Michio Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，Tetrahedron: Asymmetry，27巻，20-21号，(頁 1062 ～ 1068)，2016年11月

  23. Simple Primary Amino Amide Organocatalyst for Enantioselective Aldol Reactions of Isatins with Ketones

    Jo Kimura, Ummareddy Venkata Subba Reddy, Yoshihito Kohari, Chigusa Seki, Yasuteru Mawatari, Koji Uwai, Yuko Okuyama, Eunsang Kwon, Michio Tokiwa, Mitsuhiro Takeshita, Tatsuo Iwasa and Hiroto Nakano，European Journal of Organic Chemistry，2016巻，(頁 3728 ～ 3756)，2016年07月

  24. Catalytic Efficiency of Primary β-Amino Alcohols and Their Derivatives in Organocatalysis

    Ummareddy Venkata Subba Reddy, Madhu Chennapuram, Chigusa Seki, Eunsang Kwon, Yuko Okuyama and Hiroto Nakano，European Journal of Organic Chemistry，2016年04月

  25. アミノアルコールおよびその関連化合物を有機分子触媒として用いた不斉付加環化反応の開発

    中野博人，熊谷　淳，U. V. Subba Reddy，関　千草，奥山祐子，權　垠相，有機合成化学協会誌，74巻，7号，(頁 720 ～ 731)，2016年01月

  26. Lipase-Catalyzed Domino Michael-Aldol Reaction of 2-Methyl-1,3-Cycloalkanedione and Methyl Vinyl Ketone for the Synthesis of Bicyclic Compounds

    Kaoru Sano, Yoshihito Kohari, Hiroto Nakano, Chigusa Seki, Mitsuhiro Takeshita, Michio Tokiwa, Yoshihiko Hirose, Koji Uwai，Synthetic Communications，46巻，1号，(頁 46 ～ 54)，2015年11月

  27. Chiral primary amino alcohol organobase catalysts for the asymmetric Diels-Alder reactions of anthrones with maleimides

    Jun Kumagai, Teppei Otsuki, U. V. Subba Reddy, Yoshihito Kohari, Chigusa Seki, Koji Uwai, Yuko Okuyama, Eunsang Kwon, Michio Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano，Tetrahedron: Asymmetry，26巻，24号，(頁 1423 ～ 1439)，2015年11月

  28. Silyloxy Amino Alcohol Organocatalyst for Enantioselective 1,3-Dipolar Cycloaddition of Nitrones to α,β- Unsaturated Aldehydes

    Teppei Otsuki, Jun Kumagai, Yoshihito Kohari, Yuko Okuyama, Eunsang Kwon, Chigusa Seki, Koji Uwai, Yasuteru Mawatari, Nagao Kobayashi, Tatsuo Iwasa, Michio Tokiwa, Mitsuhiro Takeshita, Atushi Maeda, Akihiko Hashimoto, Kana Turuga, Hiroto Nakano，European Journal of Organic Chemistry，2015巻，33号，(頁 7292 ～ 7300)，2015年10月

  29. Enantioselective Diels–Alder Reaction of 1,2-Dihydropyridines with Aldehydes Using β-Amino Alcohol Organocatalyst

    Yoshihito Kohari, Yuko Okuyama, Eunsang Kwon, Taniyuki Furuyama, Nagao Kobayashi, Teppei Otuki, Jun Kumagai, Chigusa Seki, Koji Uwai, Gang Dai, Tatsuo Iwasa, and Hiroto Nakano，J. Org. Chem.，79巻，20号，(頁 9500 ～ 9511)，2014年09月

  30. Chiral Primary Amino Amide Alcohol Organocatalyst for the Asymmetric Michael Addition of 4-Hydroxycoumarin with α,β-Unsaturated Ketones

    Jun Kumagai, Yoshihito Kohari, Chigusa Seki, Koji Uwai, Yuko Okuyama, Eunsang Kwon, and Hiroto Nakano，Heterocycles，90巻，2号，(頁 1124 ～ 1134)，2014年09月

  31. Development of a Novel Method for Warfarin Synthesis via Lipase-catalyzed Stereoselective Michael Reaction

    Kaoru Sano, Shun-ichi Saito, Yoshihiko Hirose, Yoshihito Kohari, Hiroto Nakano, Chigusa Seki, Michio Tokiwa, Mitsuhiro Takeshita, Koji Uwai，Heterocycles，87巻，6号，(頁 1269 ～ 1278)，2013年05月

  32. Chiral Primary Amino Silyl Ether Organocatalyst for the Enantioselective Diels-Alder Reaction of 1,2-Dihydropyridine with Aldehydes

    Yuki Sakuta, Yoshihito Kohari, N. D. M. Romauli Hutabarat, Koji Uwai, Eunsang Kwon, Yuko Okuyama, Chigusa Seki, Haruo Matsuyama, Nobuhiro Takano, Michio Tokiwa, Mitsuhiro Takeshita, and Hiroto Nakano，Heterocycles，86巻，2号，(頁 1379 ～ 1389)，2012年08月

  33. Highly Enantioselective Synthesis of Isoquinuclidine by Diels-Alder Reaction of 1,2-Dihydropyridine Utilizing Chiral Bisoxazoline-Cu(II) Complex

    N. D. M. Romauli Hutabarat, Chigusa Seki, Takashi Shimizu, Masafumi Hirama, Yoshihito Kohari, Hiroto Nakano, Koji Uwai, Nobuhiro Takano, Eunsang Kwon and Haruo Matsuyama，Heterocycles，86巻，1号，(頁 203 ～ 217)，2012年07月

  34. One Step Synthesis of Optically Active Diazabicyclo[3.3.0]octanes or Diazabicyclo[4.3.0]nonanones by Asymmetric Conjugate Addition of Cyclic Hydrazines

    Chigusa Seki, M. Hirama, T. Sato, S. Takeda, Y. Kohari, K. Ishigaki, M. Ohuchi, K. Yokoi, H. Nakano, K. Uwai, N. Takano, K. Umemura, H. Matsuyama，Heterocycles，85巻，5号，(頁 1045 ～ 1052)，2012年05月

  35. Irreversible helix rearrangement from Cis-transoid to Cis-cisoid in poly(p-n-hexyloxyphenylacetylene) induced by heat-treatment in solid phase

    Asahi Motoshige, Yasuteru Mawatari, Yoshiaki Yoshida, Chigusa Seki, Haruo Matsuyama and Masayoshi Tabata，Journal of Polymer Science Part A: Polymer Chemistry，50巻，15号，(頁 3008 ～ 3015)，2012年04月

  36. Asymmetric Synthesis of Isoquinuclidines by Diels-Alder Reaction of 1,2-Dihydropyridine Utilizing a Chiral Lewis Acid Caralyst

    Chigusa Seki, M. Hirama, N.D.M.R. Hutabarat, J. Takada, C. Suttibut, H. Takahashi, T. Takaguchi, Y. Kohari, H. Nakano, K. Uwai, N. Takano, M. Yasui, Y. Okuyama, M. Takeshita, H. Matsuyama，Tetrahedron，68巻，6号，(頁 1774 ～ 1781)，2012年

  37. Asymmetric Synthesis of Isoquinuclidine by Diels-Alder Reaction of 1,2-Dihydropyridine and Chiral Dienophile Utilizing a Chiral Lewis Acid

    M. Hirama, C. Suttibut, N.D.M.R. Hutabarat, Chigusa Seki,* N. Sakuta, T. Tsuchiya, Y. Kohari, H. Nakano, K. Uwai,N. Takano,M. Yasui, Y. Okuyama, K. Osone, M. Takeshita, H. Matsuyama，Heterocycles，84巻，2011年

  38. Cis and trans radicals generated in helical poly(propargyl acetate)s prepared using a [Rh(norbornadiene)Cl]2 catalyst

    Y. Yoshida, Y. Mawatari, C. Seki, T. Hiraoki, H.Matsuyama，Polymer，52巻，(頁 646 ～ 651)，2011年

  39. Geometrical structure in solution and solid phase of poly(propargyl acetate)s prepared using a [Rh(norbornadiene)Cl]2 catalyst

    Y. Yoshida, Y. Mawatari, C. Seki, T. Hiraoki, H. Matsuyama，Polymer，52巻，(頁 3917 ～ 3924)，2011年

  40. A highly enantioselective Diels-Alder reaction of 1,2-dihydropyridine using a simple -aminoalcohol organocatalyst for a practical synthetic methodology of oseltamivir intermediate

    Chonticha Suttibut, Yoshihito Kohari, Ko Igarashi, Hiroto Nakano, Masafumi Hirama, Chigusa Seki, Haruo Matsuyama, Yuko Okuyama, Kenichi Osone, Mitsuhiro Takeshita, Eunsang Kwon，Tetrahedron Letters，52巻，(頁 4745 ～ 4748)，2011年

  41. A novel chiral oxazolidine organocatalyst for the synthesis of an oseltamivir intermediate using a highly enantioselective Diels-Alder reaction of 1,2-dihydropyridine

    Hiroto Nakano, Kinichi Osone, Mitsuhiro Takeshita, Eunsang Kwon, Chigusa Seki, Haruo Matsuyama, Nobuhiro Takano, Yoshihito Kohari，Chem.Comm.，46巻，(頁 4827 ～ 4829)，2010年

  42. An Efficient Synthesis of Chiral Isoquinuclidines by Diels-Alder Reaction Using Lewis Acid Catalyst

    Masafumi Hirama, Yuji Kato, Chigusa Seki, Hiroto Nakano, Mitsuhiro Takeshita, Noriko Oshikiri, Masahiko Iyoda, Haruo Matsuyama，Tetrahedron，66巻，(頁 7618 ～ 7624)，2010年

  43. Asymmetric Cycloaddition of 1,2-Dihydropyridine Derivatives in the presence of Lewis Acids

    M.Hirama, Y. Kato, C.Seki, H. Matsuyama, N. Oshikiri, M. Iyoda，Chemistry Letters，37巻，9号，(頁 924 ～ 925)，2008年09月

  44. Preparation of Chiral Polypyrrole Film-Coated Electrode Incorporating Palladium Metal and Asymmetric Hydrogenation of alfa- Keto Ester

    Nobuhiro Takano and Chigusa Seki，電気化学および工業物理化学，74巻，8号，(頁 596 ～ 598)，2006年

  45. パラジウム微粒子固定化ー光学活性ポリピロール薄膜電極の作製および電気化学的特性

    関千草、高野信弘、大西康夫，室工大紀要，55巻，(頁 39 ～ 42)，2005年

  46. 常温動作の携帯型燃料電池の開発

    渡辺正夫、松山春男、関　千草、高原健爾，燃料電池，4巻，2号，(頁 28 ～ 32)，2004年

  47. Electrochemical Hydrogenation of Organic Compounds on Poly[N-(5-carboxyhexyl) pyrrole]Film-Coated Electrodes Incorporating Palladium

    Nobuhiro Takano ,Chigusa Seki and Noboru Takeno，Bull.Chem.Soc.Jpn.，73巻，3号，(頁 745 ～ 746)，2000年

  48. Preparation of Catalytic Hydrogenation Electrodes Using Poly (N-Carboxylic Acid Sustituted Pyrrole)

    Nobuhiro Takano ,Chigusa Seki and Noboru Takeno，DENKI KAGAKU，64巻，5号，(頁 403 ～ 40)，1996年

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