Chemoenzymatic Dynamic Kinetic Asymmetric Transformations of β-Hydroxyketones

Area of Science:

• Organic Chemistry
• Biocatalysis
• Asymmetric Synthesis

Background:

• Chiral compounds are crucial in pharmaceuticals and fine chemicals.
• Efficient synthesis of enantiomerically pure molecules remains a challenge.
• Dynamic Kinetic Asymmetric Transformation (DYKAT) offers a powerful strategy.

Purpose of the Study:

• To develop and apply a chemoenzymatic DYKAT protocol.
• To synthesize α-substituted β-oxoacetates with high enantiomeric purity.
• To utilize Candida antarctica lipase B (CALB) and a ruthenium catalyst.

Main Methods:

• Employing Candida antarctica lipase B (CALB) for transesterification.
• Utilizing a ruthenium complex for epimerization.
• Developing an operationally simple protocol for DYKAT.

Main Results:

• Achieved efficient preparation of highly enantiomerically enriched α-substituted β-oxoacetates.
• Obtained products in yields up to 95%.
• Demonstrated good diastereomeric ratios.

Conclusions:

• The developed chemoenzymatic DYKAT protocol is effective for synthesizing chiral β-oxoacetates.
• This method provides a practical route to valuable enantiopure compounds.
• The combination of CALB and ruthenium catalysis offers high efficiency and selectivity.