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2006 Fiscal Year Annual Research Report

ルイス酸・遷移金属触媒を用いる環境調和型分子変換プロセスの開拓

Research Project

Project/Area Number 14002001
Research InstitutionTohoku University

Principal Investigator

山本 嘉則  Tohoku University, 大学院・理学研究科, 教授 (60029519)

Co-Investigator(Kenkyū-buntansha) 浅尾 直樹  東北大学, 大学院・理学研究科, 助教授 (60241519)
中村 達  東北大学, 大学院・理学研究科, 助手 (00333899)
金 鉄男  東北大学, 大学院・理学研究科, 助手 (80431493)
門田 功  岡山大学, 大学院・自然科学研究科, 教授 (30250666)
Keywordsルイス酸触媒 / 芳香環化 / 遷移金属触媒 / メチレンアジリジン / 分子内反応 / 不斉合成 / ヘテロ環 / ポリ環状エーテル
Research Abstract

ルイス酸触媒反応の開発
金触媒の存在下でオルトアルキニルベンズアルデヒド誘導体とケトンやアルデヒドなどのカルボニル化合物が芳香環化し、種々の芳香族ケトン類を与えることを見いだした。一方、銅触媒を用いると脱カルボニル化が進行し、対応するナフタレン類が得られることがわかった。この反応により様々なインドール、ベンゾフラン誘導体の合成を行った。また、塩化金触媒によるアルキニルケトンの環化反応を見いだした。炭素-水素結合の活性化
1,3-ジケトン類がパラジウム触媒の存在下でメチレンアジリジンと付加環化反応を起こし、種々の四置換ピロール誘導体を与えることを見いだした。また、常圧80度という条件下で、イミン類がアルコキシメチレンシクロプロパン誘導体と2+2環化付加反応を起こし、アルコキシアゼチジン誘導体を高収率で与えることを見いだした。同様の反応を銀触媒存在下で行うとより低温で反応が進行することもわかった。オルトアルキニルベンズアルデヒド誘導体と一級アミン、およびクロロホルムが無触媒で縮合し、ジヒドロイソキノリンを収率良く与えることを見いだした。
遷移金属触媒反応の開発
パラジウム触媒存在による、アルキン類とアミド化合物の分子内反応を用いて、ラクタム類を高収率で得ることに成功した。また、アミンやアルコール、および活性メチン化合物の分子内反応において、光学活性なホスフィン配位子を用いることで種々のヘテロ環化合物の不斉合成を行った。この反応を応用し、インドリジチンアルカロイド209Dの立体選択的合成に成功した。
ポリ環状エーテル系海産天然物の合成
コンバージェントな合成手法を用いて、下痢性貝毒であるイェッソトキシンのIJK環部の合成に成功した。また、同様の手法により、赤潮原因毒であるブレベトキシンBのA-G環部の高効率合成およびヘミブレベトキシンBの形式全合成にも成功した。

  • Research Products

    (32 results)

All 2007 2006

All Journal Article (32 results)

  • [Journal Article] A Convergent Approach to the Formal Total Synthesis of Hemibrevetoxin B2007

    • Author(s)
      Kadota, Isao
    • Journal Title

      Tetrahedron Letters 48

      Pages: 219-221

  • [Journal Article] Gold-Catalyzed Reaction of oxo-alkynes2007

    • Author(s)
      Patil, T. Nitin
    • Journal Title

      Archive for Organic Chemistry

      Pages: 6-19

  • [Journal Article] Mechanism and Chemoselectivities of the Pd(II)-Catalyzed Allylation of Aldehydes. A Density Functional Theory Study2007

    • Author(s)
      Pichierri, Fabio
    • Journal Title

      Journal of Organic Chemistry 72

      Pages: 861-869

  • [Journal Article] Metal-mediated Synthesis of Furanes and Pyrroles2007

    • Author(s)
      Patil, T. Nitin
    • Journal Title

      Archive for Organic Chemistry

      Pages: 121-141

  • [Journal Article] Supression of β-Hydride Elimination in the Intramolecular Hydrocarboxylation of Alkynes Leading to the Formation of Lactones2007

    • Author(s)
      Huo, Zhibao
    • Journal Title

      Advanced synthesis and catalysis 349

      Pages: 680-684

  • [Journal Article] Gold-and Indium-Catalyzed Synthesis of 3-and 6-Sulfonylindoles from ortho-Alkymyl-N-Sulfonylanilines2007

    • Author(s)
      Nakamura, Itaru
    • Journal Title

      Angewandte Chemie, International Edition 46

      Pages: 2284-2287

  • [Journal Article] Synthesis of 1,2,3,4-Tetrasubstituted Pyrrole Derivatives via the Palladium-Catalyzed Reaction of 1,3-Diketones with Methyleneaziridines2007

    • Author(s)
      Kathriarachichi, K. K. A. D. S.
    • Journal Title

      Tetrahedron Letters 48

      Pages: 2267-2270

  • [Journal Article] An Efficient, Facile, and General Synthesis of 1H-Indazoles by 1,3-Dipolar Cycloaddition of Arynes with Diazomethane Derivatives2007

    • Author(s)
      Jin, Tienan
    • Journal Title

      Angewandte Chemie, International Edition 46

      Pages: 3323-3325

  • [Journal Article] Recent Progress in the Catalytic Synthesis of Imidazoles2007

    • Author(s)
      Kamijo, Shin
    • Journal Title

      Chemistry-An Asian Journal 2

      Pages: 568-578

  • [Journal Article] Palladium-Catalyzed Three Component Coupling Reaction between Chromones, Alcohols, and Allylic Acetates: Diversity-Oriented Synthesis of Highly Substotuted Chromones2007

    • Author(s)
      Patil, Nitin T.
    • Journal Title

      Tetrahedron 63

      Pages: 5954-5961

  • [Journal Article] Synthesis of 1,3,4-Trisubstituted Isoquinolines by Iodine-Mediated Electrophilic Cyclization of 2-Alkynyl Benzyl Azides2007

    • Author(s)
      Fisher, Dirk
    • Journal Title

      Angewandte Chemie, International Edition 46

      Pages: 4764-4766

  • [Journal Article] Gold-Catalyzed Intermolecular Hydroamination of Allenes: First Eample of the Use of an Aliphatic Amine in Hydroamination2007

    • Author(s)
      Nishina, Naoko
    • Journal Title

      Synlett

      Pages: 1767-1770

  • [Journal Article] Synthesis of 2,3-Disubstituted Benzofuranes and Indoles by π-Lewis Acidic Transition Metal-Catalyzed Cyclization of ortho-Alkynylphenyl O, O-and N, O-Acetals2007

    • Author(s)
      Nakamura, Itaru
    • Journal Title

      Tetrahedron 63

      Pages: 8670-8676

  • [Journal Article] Palladium-Catalyzed Cascade Reactions of Highly Activated Olefins2007

    • Author(s)
      Patil, Nitin T
    • Journal Title

      Synlett

      Pages: 1994-2005

  • [Journal Article] A Route to 2-Substituted Tetrahydroquinolines via Palladium-Catalyzed Intramolecular Hydroamination of Anilino-alkynes2007

    • Author(s)
      Patil, Nitin T
    • Journal Title

      Journal of Organic Chemistry 72

      Pages: 6577-6579

  • [Journal Article] From σ-to π-Electrophilic Lewis Acids. Application to Selective Organic Transformations2007

    • Author(s)
      Yamamoto, Yoshinori
    • Journal Title

      Journal of Organic Chemistry 72

      Pages: 7817-7831

  • [Journal Article] Solvent-Controlled Stereoselective Formation of a Cyclic Ether in the Lewis Acid-Mediated Allylation of an α-Chloroacetoxy Acyclic Ether. Very High Stereoselectivity in CH_3CN vs Low Stereoselectivity in CH_2Cl_22007

    • Author(s)
      Gridnev, Ilya D.
    • Journal Title

      Journal of Organic Chemistry 72

      Pages: 8371-8375

  • [Journal Article] Gold-Catalyzed Cyclization of(ortho-Alkynylphenylthio)silanes: Intramolecular Capture of the Vinyl-Au Intermediate by the Silicon Electrophile2007

    • Author(s)
      Nakamura, Itaru
    • Journal Title

      Organic Letter 9

      Pages: 4081-4083

  • [Journal Article] Gold-Catalyzed Intramolecular Carbocyclization of Alkynyl Ketones Leading to Highly Substituted Cyclic Enones2007

    • Author(s)
      Jin, Tienan
    • Journal Title

      Organic Letter 9

      Pages: 5259-5262

  • [Journal Article] Palladium-Catalyzed Dimerization of Conjugated Diynes: Synthesis of(E)-1, 2-Divinyldiethynylethenes Having Donor and Acceptor Chromophores at the Terminus of Alkyne2006

    • Author(s)
      Pahadi, Nirmal K.
    • Journal Title

      Journal of Organic Chemistry 71,(3)

      Pages: 1152-1155

  • [Journal Article] Lactam Synthesis via the Intramolecular Hydroamidation of Alkynes Catalyzed by Palladium Complexes2006

    • Author(s)
      Patil, Nitin T.
    • Journal Title

      Journal of Organic Chemistry 71,(9)

      Pages: 3612-3614

  • [Journal Article] Improved Synthesis of the A-G Ring Segment of Brevetoxin B2006

    • Author(s)
      Kadota, Isao
    • Journal Title

      Journal of Organic Chemistry 71,(11)

      Pages: 4183-4187

  • [Journal Article] Palladium-Catalyzed Intramolecular Asymmetric Hydroamination, Hydroalkoxylation, and Hydrocarbonarion of Alkynes2006

    • Author(s)
      Patil, Nitin T.
    • Journal Title

      Journal of Organic Chemistry 71,(11)

      Pages: 4270-4279

  • [Journal Article] Gold-catalyzed intermolecular hydroamination of allenes with arylamines and resulting high chirality transfer2006

    • Author(s)
      Nishina, Naoko
    • Journal Title

      Angewandte Chemie, International Edition 45,(20)

      Pages: 3314-3317

  • [Journal Article] Gold-catalyzed intramolecular hydroamination of allenes. A case of chirality transfer2006

    • Author(s)
      Patil, Nitin T.
    • Journal Title

      Tetrahedron Letters 47,(27)

      Pages: 4749-4751

  • [Journal Article] PtBr_2-Catalyzed Transformation of Allyl(o-ethynylaryl)carbinol Derivatives into Functionalized Indenes. Formal sp^3 C-H Bond Activation2006

    • Author(s)
      Bajracharya, Gan B.
    • Journal Title

      Journal of Organic Chemistry 71,(16)

      Pages: 6204-6210

  • [Journal Article] Gold-catalyzed intramolecular carbothiolation of alkynes: synthesis of 2, 3-disubstituted benzothiophenes from(a-alkoxyalkyl)(ortho-alkynylphenyl)sulfides2006

    • Author(s)
      Nakamura, Itaru
    • Journal Title

      Angewandte Chemie, International Edition 45,(27)

      Pages: 4473-4475

  • [Journal Article] Synthesis of Imidazoles through the Copper-Catalyzed Cross-Cycloaddition between Two Different Isocyanides2006

    • Author(s)
      Kanazawa, Chikashi
    • Journal Title

      Journal of the American Chemical Society 128,(33)

      Pages: 10662-10663

  • [Journal Article] Palladium-Catalyzed Decarboxylative Aza-Michael Addition-Allylation Reactions between Allyl Carbamates and Activated Olefins. Generation of Quaternary Carbon Adjacent to Secondary Amine Carbon Center2006

    • Author(s)
      Patil, Nitin T.
    • Journal Title

      Journal of Organic Chemistry 71,(18)

      Pages: 6991-6995

  • [Journal Article] Cyclopropyl building blocks for organic synthesis: Part 129. Thermally induced and silver-salt-catalyzed[2+2]cycloadditions of imines to(alkoxymethylene)cyclopropanes2006

    • Author(s)
      Nakamura, Itaru
    • Journal Title

      Angewandte Chemie, International Edition 45,(31)

      Pages: 5176-5179

  • [Journal Article] Stereocontrolled synthesis of the IJK ring segment of yessotoxin2006

    • Author(s)
      Kadota, Isao
    • Journal Title

      Tetrahedron Letters 47,(37)

      Pages: 6545-6548

  • [Journal Article] Palladium-catalyzed allylation of pro nucleophiles with alkynes at 50 DegC- remarkable effect of 2-(dicyclohexylphosphanyl)-2'-(dimethylamino)biphenyl as ligand2006

    • Author(s)
      Patil, N. itin T.
    • Journal Title

      European Journal of Organic Chemistry (18)

      Pages: 4211-4213

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Published: 2010-02-01   Modified: 2016-04-21  

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