ThDP-dependent enzyme catalyzed oxidation of aldehydes

Area of Science:

• Biocatalysis
• Enzymology
• Organic Chemistry

Background:

• Thiamine diphosphate (ThDP)-dependent enzymes are known catalysts for decarboxylation and condensation reactions.
• Their role in oxidation reactions, particularly via single electron transfer (SET), has not been previously established.

Purpose of the Study:

• To investigate a novel ThDP-dependent enzymatic oxidation of aldehydes.
• To explore the mechanism involving sequential single electron transfer (SET) processes.
• To assess the efficiency and stereoselectivity of this new enzymatic capability.

Main Methods:

• Utilized ThDP-dependent enzymes for aldehyde oxidation.
• Employed hexachloroethane (C2Cl6) as the oxidant.
• Investigated reaction efficiency, yield, turnover number, and stereoselectivity (e.e.).

Main Results:

• Achieved high reaction efficiency with yields up to 99%.
• Demonstrated high turnover numbers (up to 2000).
• Obtained excellent stereoselective control for dynamic kinetic resolutions (e.e. up to 99%).

Conclusions:

• ThDP-dependent enzymes possess a previously unrecognized capability for aldehyde oxidation via SET.
• This finding significantly broadens the functional scope of ThDP-dependent enzymes.
• The developed method offers an efficient and stereoselective approach for aldehyde transformations.