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Development of secondary alcohol selective oxidation reaction by nitroxyl radical catalysts

Research Project

Project/Area Number 19K16327
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 47010:Pharmaceutical chemistry and drug development sciences-related
Research InstitutionKyoto Pharmaceutical University

Principal Investigator

Hamada Shohei  京都薬科大学, 薬学部, 助教 (00833170)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywordsニトロキシルラジカル / 酸化触媒 / 化学選択的酸化 / p-メトキシベンジル基 / ベンジル基 / 脱保護 / 第二級水酸基選択的酸化 / ベンジル系保護基の脱保護 / C-H酸化 / 第二級水酸基 / 化学選択的性 / Electronic Tuning / p-メトキシベンジルエーテル / 酸化反応 / ポリオール
Outline of Research at the Start

TEMPO 等の一般的に知られるニトロキシル型酸化触媒は立体障害の小さな第一級水酸基を選択的に酸化する。本研究では、独自の触媒により、既存のニトロキシル型触媒では達成困難な第一級水酸基存在下での第二級水酸基選択的酸化反応を開発する。また、第一級、第二級エクアトリアル、アキシアル水酸基を有し、選択的官能基変換が困難な糖類のアキシアル水酸基選択的酸化反応の達成を目指す。さらに、この反応の生成物であるケト体を起点としたアミノグリコシド系抗生物質ジベカシンの効率的合成を達成し、医薬品合成における本反応の有用性を示す。

Outline of Final Research Achievements

Chemoselective oxidation of aliphatic secondary hydroxy groups in the presence of primary ones by nitroxyl radical oxidation catalysts. I achieved highly selective oxidation of the secondary hydroxy group of 4-[3-(2-hydroxyethyl)phenyl]butan-2-ol by a nitroxyl catalyst having an ester group next to the active center.
Furthermore, in the process of conducting this study, a nitroxyl catalyst having dister group next to the active center was effective in deprotecting benzyl-type protecting groups. These results indicate that the diester-type nitroxyl catalst can oxidize not only alcohols but also benzylic ethers.

Academic Significance and Societal Importance of the Research Achievements

ニトロキシル型触媒は天然化合物や医薬品の合成に幅広く使用されている。TEMPOやAZADOといった汎用されるニトロキシル型触媒は第二級水酸基存在下、第一級水酸基選択的な酸化を引き起こすが、報告者が開発したジエステル型ニトロキシル触媒はTEMPOやAZADOとは異なる選択性を示すことを明らかとした。
また、本研究において、ジエステル型ニトロキシル触媒がアルコールの保護基として汎用されるベンジル系保護基の脱保護に有用であることを明らかにした。本結果は、ニトロキシル型触媒の新しい反応性を示す結果であり、有機合成化学やプロセス化学への波及効果が大きいと考える。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (15 results)

All 2021 2020 2019

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Concise Synthesis of an Amide-Functionalized [7]Helicene-like Molecule via Intramolecular Amidation2021

    • Author(s)
      Xing Yongning、Nikaido Masanori、Murai Takuya、Hamada Shohei、Kobayashi Yusuke、Sasamori Takahiro、Kawabata Takeo、Furuta Takumi
    • Journal Title

      Heterocycles

      Volume: - Issue: 1 Pages: 544-544

    • DOI

      10.3987/com-20-s(k)40

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chemoselective oxidation of p-methoxybenzyl ethers by an electronically tuned nitroxyl radical catalyst2020

    • Author(s)
      Shohei Hamada, Koichi Sugimoto, Elghareeb E. Elboray, Takeo Kawabata, Takumi Furuta
    • Journal Title

      Org. Lett.

      Volume: 22 Issue: 14 Pages: 5486-5490

    • DOI

      10.1021/acs.orglett.0c01839

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Conformational Control in Dirhodium(II) Paddlewheel Catalysts Supported by Chalcogen-Bonding Interactions for Stereoselective Intramolecular C?H Insertion Reactions2020

    • Author(s)
      Murai Takuya、Lu Wenjie、Kuribayashi Toshifumi、Morisaki Kazuhiro、Ueda Yoshihiro、Hamada Shohei、Kobayashi Yusuke、Sasamori Takahiro、Tokitoh Norihiro、Kawabata Takeo、Furuta Takumi
    • Journal Title

      ACS Catalysis

      Volume: 11 Issue: 2 Pages: 568-578

    • DOI

      10.1021/acscatal.0c03689

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthesis of Axially Chiral Binaphthothiophene delta-Amino Acid Derivatives Bearing Chalcogen Bonds2020

    • Author(s)
      Hamada, S.; Wang, S.; Murai, T.; Xing, Y.; Inoue, T.; Ueda, Y.; Sasamori, T.; Kawabata, T.; Furuta, T.
    • Journal Title

      Heterocycles

      Volume: 101 Issue: 1 Pages: 328-338

    • DOI

      10.3987/com-19-s(f)15

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Axial Chirality in N,N-Dialkylaminopyridine Derivatives Bearing an Internal Carboxy Group2020

    • Author(s)
      Nishino, R.; Hamada, S.; Elboray, E. E.; Ueda, Y.; Kawabata, T.; Furuta, T.
    • Journal Title

      Chirality

      Volume: 32 Issue: 5 Pages: 588-593

    • DOI

      10.1002/chir.23207

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Simple and rapid p-methoxybenzylation of hydroxy and amide groups at room temperature by NaOt-Bu and DMSO2019

    • Author(s)
      Hamada, S.; Sugimoto, K.; Iida, M.; Furuta, T.
    • Journal Title

      Tetrahedron Letters

      Volume: 60 Issue: 48 Pages: 151277-151277

    • DOI

      10.1016/j.tetlet.2019.151277

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Electronic Tuning 型ニトロキシル酸化触媒によるイソクロマンの酸化2021

    • Author(s)
      浜田 翔平、矢野 恭子、Elghareeb E. Elboray、小林 祐輔、川端 猛夫、古田 巧
    • Organizer
      日本薬学会第141年会、広島
    • Related Report
      2020 Annual Research Report
  • [Presentation] ニトロキシル型酸化触媒によるベンジル系保護基の脱保護2021

    • Author(s)
      角田 舞子、浜田 翔平、杉本 晃一、川端 猛夫、古田 巧
    • Organizer
      日本薬学会第141年会、広島
    • Related Report
      2020 Annual Research Report
  • [Presentation] ニトロキシル型酸化触媒によるp-メトキシベンジル基の脱保護2020

    • Author(s)
      浜田翔平、杉本晃一、Elghareeb E. Elboray、川端猛夫、古田 巧
    • Organizer
      第70回 日本薬学会 関西支部大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] NaOt-Bu 及び DMSO を用いたアルコール及びアミドのp-メトキシベンジル化2020

    • Author(s)
      浜田翔平、杉本晃一、飯田雅士、古田 巧
    • Organizer
      日本薬学会第140年会
    • Related Report
      2019 Research-status Report
  • [Presentation] ニトロキシル型酸化触媒による p-メトキシベンジルエーテルの酸化2019

    • Author(s)
      浜田翔平、杉本晃一、川端猛夫、古田 巧
    • Organizer
      17回次世代を担う有機化学シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] Chemoselective Oxidation by Electronically Tuned Nitroxyl Radical Catalysts2019

    • Author(s)
      Shohei Hamada
    • Organizer
      ICPAC Yangon 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Oxidation of p-Methoxybenzyl Ethers by Electronically Tuned Nitroxyl Radical Catalysts2019

    • Author(s)
      Shohei Hamada, Koichi Sugimoto, Takeo Kawabata, Takumi Furuta
    • Organizer
      27th International Society of Heterocyclic Chemistry Congress
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Oxidation of p-Methoxybenzyl Ethers by Electronically Tuned Nitroxyl Radical Catalysts2019

    • Author(s)
      Shohei Hamada, Koichi Sugimoto, Takeo Kawabata, Takumi Furuta
    • Organizer
      The 8th Japanese-Sino Symposium on Organic Chemistry for Young Scientists
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ニトロキシル型触媒による p-メトキシベンジルエーテルの酸化2019

    • Author(s)
      杉本晃一、浜田翔平、川端猛夫、古田 巧
    • Organizer
      第69回日本薬学会関西支部総会・大会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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