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Albocycline: structure determination by x-ray crystallography

R C Thomas, C G Chidester

    The Journal of Antibiotics
    |December 1, 1982
    PubMed
    Summary

    The macrolide antibiotic albocycline

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    Area of Science:

    • Organic Chemistry
    • Medicinal Chemistry
    • Structural Biology

    Background:

    • Macrolide antibiotics are crucial in treating bacterial infections.
    • Determining the precise structure and stereochemistry of antibiotics is vital for understanding their mechanism of action and for drug development.
    • Albocycline is a macrolide antibiotic with potential therapeutic applications.

    Purpose of the Study:

    • To elucidate the definitive three-dimensional structure of the macrolide antibiotic albocycline.
    • To establish the absolute stereochemical configuration of albocycline.
    • To provide a structural basis for future research and development of albocycline analogs.

    Main Methods:

    • X-ray crystallographic analysis was performed on a derivative of albocycline, specifically the p-bromobenzoate ester (1b).
    • This technique allows for the precise determination of atomic positions and bond connectivities in a crystalline solid.
    • The data obtained from X-ray diffraction was used to build and refine a 3D model of the molecule.

    Main Results:

    • The complete molecular structure of albocycline was resolved.
    • The absolute configuration of albocycline was unequivocally determined to be 4R, 7S, 12S, 13R.
    • The crystallographic data provided detailed insights into the conformation of the macrolide ring and its substituents.

    Conclusions:

    • The absolute configuration of albocycline (1a) has been confirmed as 4R, 7S, 12S, 13R.
    • This structural determination is a significant advancement for the field of macrolide antibiotic research.
    • The established stereochemistry provides a foundation for structure-activity relationship studies and the design of novel antibiotic agents.

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