Cooperative redox activation for carbon dioxide conversion.

Area of Science:

• Organic Chemistry
• Catalysis
• Sustainable Chemistry

Background:

• Developing catalytic methods for carbon dioxide (CO2) conversion into chemicals is a significant challenge in production chemistry.
• Existing silane and borane promoted reductions offer C1-building blocks but generate stoichiometric waste.

Purpose of the Study:

• To report a novel method for CO2 conversion using diaryldisilanes.
• To demonstrate a cooperative redox activation strategy for CO2 transformation.
• To synthesize pharmaceutically relevant diarylketones.

Main Methods:

• Conversion of CO2 with diaryldisilanes.
• Cooperative redox activation generating carbon monoxide and diaryldisiloxane.
• Palladium-catalysed carbonylative Hiyama-Denmark coupling.

Main Results:

• Diaryldisilanes act as oxygen abstracting agents from CO2.
• The generated diaryldisiloxane participates as a reagent in the Hiyama-Denmark coupling.
• A range of pharmaceutically relevant diarylketones were synthesized.

Conclusions:

• The developed method efficiently converts CO2 into useful chemicals.
• The silicon-containing byproduct plays an active role in the catalytic cycle.
• This cooperative redox activation opens new pathways for CO2 utilization.