Synthetic Studies on Selective, Proapoptotic Isomalabaricane Triterpenoids Aided by Computational Techniques

Area of Science:

• Marine natural products chemistry
• Organic synthesis
• Chemical biology

Background:

• Isomalabaricanes are marine triterpenoids with complex structures.
• They exhibit selective and potent apoptosis-inducing properties in cancer cell lines.

Purpose of the Study:

• To achieve the total synthesis of isomalabaricanes stelletin A, stelletin E, and rhabdastrellic acid A.
• To develop a general strategy for synthesizing other isomalabaricanes.
• To investigate the structure-activity relationship of stelletin A.

Main Methods:

• Total synthesis
• High-throughput experimentation
• Computational chemistry

Main Results:

• Successful total syntheses of stelletin A, stelletin E, and rhabdastrellic acid A were accomplished.
• A general synthetic strategy for accessing other isomalabaricanes was developed.
• A preliminary structure-activity relationship study identified the trans-syn-trans core as critical for cytotoxic activity.

Conclusions:

• The total synthesis of key isomalabaricanes and a general synthetic strategy were established.
• The trans-syn-trans core motif is essential for the cytotoxic activity of isomalabaricanes.
• This work provides a foundation for further exploration of isomalabaricanes in cancer therapy.