論文 - 関　　千草

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