Structure of FD-895 revealed through total synthesis

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Synthetic Chemistry

Background:

• FD-895 is a complex macrolide compound with potential therapeutic applications.
• Confirmation of its structure and exploration of analogs are crucial for drug development.

Purpose of the Study:

• To achieve the total synthesis of FD-895.
• To confirm the structure of FD-895 through stereoisomer analysis.
• To identify analogs with improved bioactivity.

Main Methods:

• Employed a tandem esterification and ring-closing metathesis (RCM) strategy for macrolide ring formation.
• Utilized a modified Stille coupling to attach the characteristic side chain.
• Analyzed all four possible stereoisomers at the C16-C17 positions.

Main Results:

• Successfully completed the total synthesis of FD-895.
• Confirmed the precise structure of FD-895.
• Identified a novel analog exhibiting enhanced subnanomolar bioactivity.

Conclusions:

• The developed synthetic strategy is effective for constructing complex macrolides like FD-895.
• Structural confirmation was achieved through rigorous stereochemical analysis.
• The discovery of a potent analog opens avenues for further medicinal chemistry exploration.