Total synthesis and structure validation of (+)-bistramide C

Area of Science:

• Organic Chemistry
• Natural Product Synthesis
• Marine Chemistry

Background:

• Marine natural products like bistramide C are complex molecules with potential biological activities.
• The initial structural elucidation of (+)-bistramide C relied on spectroscopic methods and chemical analysis.
• Establishing the absolute and relative configurations of natural products is crucial for understanding their properties and for future drug development.

Purpose of the Study:

• To achieve a convergent total synthesis of the marine natural product (+)-bistramide C.
• To unequivocally confirm the proposed relative and absolute configurations of (+)-bistramide C.
• To validate the effectiveness of combined [alpha]D analysis, NMR spectroscopy, and synthetic approaches in structural determination.

Main Methods:

• Convergent total synthesis strategy.
• Application of advanced NMR techniques for structural elucidation.
• [alpha]D analysis for optical rotation measurements.
• Stereochemical analysis and comparison with proposed configurations.

Main Results:

• Successful execution of the convergent total synthesis of (+)-bistramide C.
• Experimental data from the synthesis unequivocally confirmed the proposed relative and absolute configurations.
• The synthesis validated the initial structural assignments made through [alpha]D analysis, NMR, and preliminary synthetic efforts.

Conclusions:

• The total synthesis provides definitive proof of the structure of (+)-bistramide C.
• The study highlights the power of modern synthetic chemistry in confirming complex natural product structures.
• This work serves as a benchmark for future investigations into bistramide analogs and their potential applications.