Methoxide-Enabled Zirconium-Catalyzed Migratory Alkene Hydrosilylation.

Area of Science:

• Organometallic Chemistry
• Catalysis
• Organic Synthesis

Background:

• Alkene hydrosilylation is a key transformation in organic synthesis.
• Existing methods often require harsh conditions or specialized catalysts.
• Zirconium-based catalysts offer potential for milder and more efficient transformations.

Purpose of the Study:

• To develop a new zirconocene dichloride-catalyzed alkene hydrosilylation reaction.
• To investigate the mechanism and scope of this new catalytic system.
• To provide a more accessible and operationally simple alternative to current methods.

Main Methods:

• Catalytic alkene hydrosilylation using zirconocene dichloride.
• Employing lithium methoxide as a catalyst activating agent.
• Mechanistic studies involving experiments and computational calculations.

Main Results:

• The catalytic system effectively hydrosilylates non-activated and conjugated terminal and internal alkenes.
• A selective conversion to linear products was achieved via a catalytic Zr-walk process.
• Lithium methoxide significantly improved applicability and operational simplicity.
• A mechanism involving zirconium(IV) intermediates was proposed.

Conclusions:

• Zirconocene dichloride-catalyzed alkene hydrosilylation is a versatile and efficient method.
• The reaction offers a benign and readily available alternative to established methods.
• The developed protocol enhances the scope and simplicity of alkene functionalization.