2022 Fiscal Year Final Research Report
Novel chiral resolution by crystallization based on phase diagram study
Project/Area Number |
21K20534
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Research Category |
Grant-in-Aid for Research Activity Start-up
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Allocation Type | Multi-year Fund |
Review Section |
0501:Physical chemistry, functional solid state chemistry, organic chemistry, polymers, organic materials, biomolecular chemistry, and related fields
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Research Institution | Osaka University |
Principal Investigator |
Oketani Ryusei 大阪大学, 大学院基礎工学研究科, 助教 (60874956)
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Project Period (FY) |
2021-08-30 – 2023-03-31
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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 |
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.
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Free Research Field |
物理化学
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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。
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