Highly Active Oligoethylene Glycol Pleuromutilins via Systematic Linker Synthesis/One-Pot Attachment and a Microscale...

Area of Science:

• Medicinal Chemistry
• Natural Product Derivatization
• Antibiotic Development

Background:

• Semisynthetic derivatization of natural products is vital for advancing antibiotic development.
• Current commercial pleuromutilin derivatives rely on amine groups to improve solubility.
• There is a need for novel strategies to enhance the efficacy and solubility of existing antibiotic scaffolds.

Purpose of the Study:

• To explore the synthesis and antibacterial activity of oligoethylene glycol-substituted pleuromutilins.
• To develop a versatile and efficient method for attaching glycolate linkers to pleuromutilin.
• To introduce a novel microscale method for assessing compound solubility.

Main Methods:

• A one-pot deprotection/attachment strategy was employed using thiolates protected as thioesters.
• Synthesis of bifunctional linkers amenable to various chemical applications.
• Antibacterial assays were performed to evaluate the efficacy of the modified compounds.
• A new microscale solubility assay was utilized.

Main Results:

• Oligoethylene glycol-substituted pleuromutilins exhibited high antibacterial activity and improved solubility.
• The glycolate modification resulted in a 4-8 fold enhancement in inhibition compared to unmodified pleuromutilin.
• The developed linker synthesis approach proved versatile and broadly applicable.

Conclusions:

• Simple glycolate modification of pleuromutilins significantly enhances their antibacterial properties and solubility.
• The one-pot synthesis strategy offers an efficient route to novel, potent antibiotic derivatives.
• The findings contribute to the development of new antibiotics derived from natural products.