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In this work, according to the 'me-too me-better' design strategy, a peculiar side chain different from lefamulin at C14 position of pleuromutilin was introduced. A series of novel thioether pleuromutilin derivatives containing cyclohexane in the C14 chain was synthesized by ten-step synthesis reaction. All derivatives were characterized by Nuclear Magnetic Resonance (NMR) and High Resolution Mass Spectrometer (HRMS). Furthermore, majority of derivatives displayed moderate antibacterial activity in vitro. However, the compound 2C and 2J exhibited comparable or superior antibacterial activity to lefamulin. The summarized structure-activity relationship not only made the variety of pleuromutilin derivatives more diverse, but also provided new ideas for its design and development.
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http://dx.doi.org/10.1016/j.bmcl.2020.126969 | DOI Listing |
Front Vet Sci
August 2025
Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.
Amphenmulin is a novel pleuromutilin derivative with proven excellent antibacterial activity. To investigate its metabolism in animals, ultra-high-performance liquid chromatography coupled with quadrupole/time-of-flight mass spectrometry (UHPLC-Q-TOF-MS/MS) was employed to analyze and identify metabolites in rats and chickens and using human, rat, pig, chicken and beagle dog liver microsomes. We identified 18 metabolites from liver microsomes and 24 and 17 metabolites for rats and chickens, respectively.
View Article and Find Full Text PDFEur J Med Chem
November 2025
Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, China. Electronic address:
The overuse of antibiotics has led to the progressively severe issue of bacterial drug resistance. As a result, a large number of antibiotics available on the market show a notably diminished effectiveness against drug-resistant bacteria. Thus, a series of dimethylcysteamine pleuromutilin derivatives were designed and synthesized.
View Article and Find Full Text PDFMolecules
May 2025
Laboratory of Veterinary Clinical Pharmacology, College of Veterinary Medicine, Inner Mongolia Agricultural University, No. 29, Erdosdong Road, Hohhot 010011, China.
The pleuromutilin derivative, the compound PL-W, was synthesized by introducing a 4-fluorophenyl group at the C21 position and selected for comprehensive antibacterial evaluation. PL-W demonstrated notable antibacterial activity against methicillin-resistant (MRSA), with a minimum inhibitory concentration (MIC) of 0.03125 µg/mL, which is significantly lower than that of tiamulin (0.
View Article and Find Full Text PDFEur J Med Chem
September 2025
State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Department of New Drug Research and Development, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China. Electronic address:
Pleuromutilin, a diterpene fungal metabolite, serves as a privileged scaffold for antibiotic discovery. Improving its antibacterial activity and broadening its spectrum remain the primary objectives in developing novel pleuromutilin derivatives. To obtain an ideal candidate, a series of pleuromutilin analogues conjugated to the triphenylphosphonium cation (TPP) were designed and synthesized.
View Article and Find Full Text PDFPoult Sci
August 2025
Guangdong Key Laboratory for Veterinary Drug Development and Safety evaluation, College of Veterinary Medicine, South China Agricultural University, 510642 Guangzhou, China. Electronic address:
Mycoplasma gallisepticum (M. gallisepticum, MG) is the primary pathogen of chronic respiratory disease (CRD) in chickens and leads to pneumonia and air sacculitis in infected chickens and a corresponding economic loss for the poultry industry. The pleuromutilins have excellent anti-mycoplasmal activity and we evaluated the in vivo activity of a new derivative 22-((4-((2-furan-1-yl)acetamido)phenyl)thio) deoxypleuromutilin (p-furoylamphenmulin) against M.
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