Revisit to (Z)-civetone synthesis

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Macrolide Synthesis

Background:

• Civetone is a macrocyclic ketone with significant applications in perfumery.
• Existing synthetic routes to civetone can be complex and lengthy.
• Sustainable and efficient synthesis of natural products is a key area of research.

Purpose of the Study:

• To develop an efficient synthetic route to (Z)-civetone.
• To utilize readily available starting materials like oleic acid.
• To explore the application of olefin metathesis and Dieckmann cyclization in macrolide synthesis.

Main Methods:

• Intermolecular olefin self-metathesis of oleic acid derivatives.
• Conversion of the resulting olefin to an alkyne via bromination/dehydrobromination.
• Semi-hydrogenation of the alkyne to the (Z)-alkene.
• Intramolecular Dieckmann macrocyclization to form the civetone ring.

Main Results:

• Successful synthesis of (Z)-civetone (1) from oleic acid (5).
• The synthetic sequence involved key steps including olefin metathesis and Dieckmann cyclization.
• The described method provides a viable pathway to this important macrocyclic ketone.

Conclusions:

• The described synthetic strategy offers an efficient route to (Z)-civetone.
• This approach highlights the utility of modern synthetic organic chemistry techniques for natural product synthesis.
• The use of oleic acid as a precursor demonstrates a potential for sustainable synthesis.