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  • Title: Synthesis and antibacterial activities of novel pleuromutilin derivatives bearing an aminothiophenol moiety.
    Author: Zhang ZS, Huang YZ, Luo J, Jin Z, Liu YH, Tang YZ.
    Journal: Chem Biol Drug Des; 2018 Sep; 92(3):1627-1637. PubMed ID: 29722184.
    Abstract:
    We synthesized a series of novel thioether pleuromutilin derivatives incorporating 2-aminothiophenol moieties into the C14 side chain via acylation reactions under mild conditions. We evaluated the in-vitro antibacterial activities of the derivatives against methicillin-resistant Staphylococcus aureus (MRSA, ATCC 43300), Staphylococcus aureus (ATCC 29213) and Escherichia coli (ATCC 25922). The majority of the synthesized derivatives possessed moderate antibacterial activities. Compound 8 was found to be the most active antibacterial derivative against MRSA. We conducted docking experiments to understand the possible mode of interactions between compounds 8, 9b, 11a and 50S ribosomal subunit. The docking results proved that there is a reasonable correlation between the binding free energy and the antibacterial activity. Compound 8 was evaluated for its in-vivo antibacterial activity and showed higher efficacy than tiamulin against MRSA in mouse infection model.
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