Formal total synthesis of (±)-liphagal

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Natural Product Synthesis

Background:

• Liphagal is a complex natural product with potential biological activity.
• Developing efficient synthetic routes to complex molecules is crucial for further research.

Purpose of the Study:

• To achieve the first formal total synthesis of (±)-liphagal.
• To develop novel synthetic methodologies applicable to complex molecule construction.

Main Methods:

• Copper/1,2,4-benzenetriol-promoted hydroxybenzofuran formation from an alkynylquinone via an organic redox process.
• Silver(I)-catalyzed cationic seven-membered ring construction.
• Stereoselective hydrogenation for diastereomer synthesis.

Main Results:

• Successful formal total synthesis of (±)-liphagal.
• Demonstration of a novel hydroxybenzofuran formation reaction.
• Establishment of a stereoselective route to the natural diastereomer.

Conclusions:

• The reported synthetic route provides an efficient pathway to (±)-liphagal.
• The developed methodologies offer new tools for organic synthesis.
• This synthesis paves the way for further biological evaluation of liphagal and its analogs.