Copper-catalyzed borylative allyl-allyl coupling reaction.

Area of Science:

• Organic Chemistry
• Catalysis
• Organoboron Chemistry

Background:

• Allyl-allyl coupling reactions are fundamental in organic synthesis.
• Developing selective methods for C-B bond formation is crucial for accessing diverse boron-containing molecules.

Purpose of the Study:

• To develop a novel copper-catalyzed borylative allyl-allyl coupling reaction.
• To utilize readily available starting materials like allenes and allyl phosphates.

Main Methods:

• Employing a copper catalyst with an N-heterocyclic carbene ligand.
• Reacting allenes with bis(pinacolato)diboron and allyl phosphates.

Main Results:

• The reaction successfully afforded boryl-substituted 1,5-diene derivatives.
• Good to high yields were achieved.
• High regioselectivity and Z-selectivity were observed.

Conclusions:

• A new, efficient method for borylative allyl-allyl coupling has been established.
• The developed protocol offers a valuable route to functionalized borylated dienes.