Biocatalytic oxidative cross-coupling reactions for biaryl bond formation

Area of Science:

• Biocatalysis
• Organic Chemistry
• Enzyme Engineering

Background:

• Biaryl compounds are crucial in medicine, materials science, and catalysis.
• Forming biaryl bonds typically requires multiple steps and faces selectivity challenges.
• Oxidative coupling of C-H bonds is an efficient strategy but lacks control.

Purpose of the Study:

• To develop a biocatalytic method for oxidative cross-coupling of C-H bonds.
• To engineer cytochrome P450 enzymes for selective biaryl bond formation.
• To create a programmable platform for synthesizing sterically hindered biaryls.

Main Methods:

• Utilized natural cytochrome P450 enzymes for cross-coupling reactions.
• Applied directed evolution to engineer P450s for enhanced reactivity and selectivity.
• Tested the method on a range of phenolic substrates.

Main Results:

• Demonstrated biocatalytic cross-coupling of phenolic substrates using P450s.
• Engineered a P450 enzyme to achieve high efficiency and selectivity.
• Successfully formed sterically hindered biaryl bonds with catalyst control.

Conclusions:

• Biocatalytic oxidative cross-coupling using engineered P450s is a viable strategy.
• This method provides precise control over reactivity, site selectivity, and atroposelectivity.
• The engineered P450 platform enables programmable synthesis of valuable biaryl compounds.