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Novel chiral resolution by crystallization based on phase diagram study

Research Project

Project/Area Number 21K20534
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0501:Physical chemistry, functional solid state chemistry, organic chemistry, polymers, organic materials, biomolecular chemistry, and related fields
Research InstitutionOsaka University

Principal Investigator

Oketani Ryusei  大阪大学, 大学院基礎工学研究科, 助教 (60874956)

Project Period (FY) 2021-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords有機結晶 / 晶析 / 光学分割 / ジアステレオマー / キラリティ / キラル結晶 / 動的結晶化 / キラリティー / 不斉増幅 / コングロメレート
Outline of Research at the Start

ジアステレオマーの混合物をエピメリ化条件中、選択的に特定の異性体を結晶化させることにより、単一のエナンチオマーへと変換しつつ結晶化させる「デエピメリ化」の開発を行う。キラル化合物の相図に基づいて結晶化条件を決定することにより、単なるケーススタディに留まらない汎用的な手法を開発する。

Outline of Final Research Achievements

We conducted a search for conglomerate crystals by salt formation of the synthetic intermediate of ozanimod, aminoindane derivative, with over 100 of acidic compounds, and found that the salt with a tartaric acid derivative forms a solid solution. For this system, we constructed a melting point phase diagram and ternary isotherms. Based on these studies, we achieved chiral resolution using a solid solution diastereomer salt. Furthermore, we showed that chiral resolution with enantioselective dissolution is possible by immersing crystals with a composition that has reached thermodynamic equilibrium in a fresh solvent.

Academic Significance and Societal Importance of the Research Achievements

本研究は相図の構築によって、晶析による固溶体の光学分割の熱力学的な限界点を示し、それを超えた光学分割としてエナンチオ選択的な溶解を組み合わせることを提案した。この成果は、固溶体を形成する系において優れたエナンチオ選択的純度を迅速に達成する方法を開拓したものと考えられる。このような手法は、限られた時間と物理的資源で経済的にプロセス開発を進める必要のある技術者や研究者が固溶体に遭遇した際でも、効率的に光学分割を行える手法になりうる。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] University of Rouen Normandy(フランス)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Overcoming a solid solution system on chiral resolution: combining crystallization and enantioselective dissolution2023

    • Author(s)
      Oketani Ryusei、Shiohara Koki、Hisaki Ichiro
    • Journal Title

      Chemical Communications

      Volume: - Issue: 41 Pages: 6175-6178

    • DOI

      10.1039/d3cc01352a

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Use of Conglomerate Mixed Crystals to Deracemize a Stable Racemic‐Compound‐Forming System2023

    • Author(s)
      Pinetre Clement、Gendron Francois‐Xavier、Kuroda Reiko、Oketani Ryusei、Aupetit Christian、Buffeteau Thierry、Coquerel Gerard
    • Journal Title

      Chemistry - A European Journal

      Volume: - Issue: 27

    • DOI

      10.1002/chem.202300441

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Order?Disorder Phase Transition between High- and Low-<i>Z</i>′ Crystal Structures of the <i>P</i>1 Space Group2022

    • Author(s)
      Oketani Ryusei、Takahashi Hiroki、Clevers Simon、Oyamada Akira、Hisaki Ichiro、Coquerel G?rard、Yamanaka Kazuaki、Tsue Hirohito
    • Journal Title

      Crystal Growth & Design

      Volume: 22 Issue: 4 Pages: 2230-2238

    • DOI

      10.1021/acs.cgd.1c01330

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Order-disorder Phase Transition between High and Low Z’ Crystal Structures of N,C-protected dipeptide2022

    • Author(s)
      Ryusei Oketani, Hiroki Takahashi, Simon Clevers, Akira Oyamada, Ichiro Hisaki, Gerard Coquerel, Kazuaki Yamanaka, Hirohito Tsue
    • Organizer
      14th International Conference on Crystal Growth of Organic Materials (CGOM14)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Order-Disorder Phase Transition of N,C-protected Methyonylglycine2022

    • Author(s)
      Ryusei Oketani, Hiroki Takahashi, Simon Clevers, Akira Oyamada, Ichiro Hisaki, Gerard Coquerel, Kazuaki Yamanaka, Hirohito Tsue
    • Organizer
      The 17th Conference of the Asian Crystallographic Association (AsCA2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] メチオニルグリシン保護体のHigh-Z’な結晶構造と秩序-無秩序相転移2021

    • Author(s)
      桶谷龍成
    • Organizer
      Molecular Chirality 2021
    • Related Report
      2021 Research-status Report

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Published: 2021-10-22   Modified: 2024-01-30  

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