General and selective deoxygenation by hydrogen using a reusable earth-abundant metal catalyst

Area of Science:

• Organic Chemistry
• Catalysis
• Sustainable Chemistry

Background:

• Chemoselective deoxygenation is vital for modifying complex molecules like pharmaceuticals and upgrading biomass.
• Existing methods often face challenges with selectivity and harsh conditions.

Purpose of the Study:

• To develop a reusable, earth-abundant catalyst for highly chemoselective deoxygenation using hydrogen gas.
• To demonstrate the catalyst's efficacy on diverse substrates, including those with sensitive functional groups.

Main Methods:

• Synthesis of a reusable catalyst from a bimetallic coordination compound and charcoal.
• Application of the catalyst for the deoxygenation of primary, secondary, and tertiary alcohols, ketones, and aldehydes.
• Testing the catalyst's tolerance to various functional groups and its performance on complex molecules.

Main Results:

• Achieved highly chemoselective deoxygenation of alcohols and carbonyl compounds.
• Demonstrated broad substrate scope, including complex natural products and pharmaceuticals.
• Catalyst showed excellent tolerance to hydrogenation-sensitive functional groups.
• The catalyst is reusable, efficient, and easy to handle.

Conclusions:

• The developed catalyst provides a selective, sustainable, and cost-efficient deoxygenation method.
• This approach is suitable for late-stage functionalization and biomass upgrading under industrially viable conditions.