Visible Light-Driven Deracemization of α-Aryl Cyclic Ketones by Synergistic Catalysis
A research team from Nankai University, Sichuan University, and Zhejiang Normal University developed a novel visible light-driven catalytic strategy for deracemization of α-aryl cyclic ketones using photocatalysis, hydrogen atom transfer, and chiral phosphoric acid. This approach enhances enantioselectivity while maintaining mild reaction conditions and broad substrate compatibility. Mechanistic studies reveal the role of conformational distortion in catalyst efficiency. The method promises significant applications in asymmetric synthesis for pharmaceuticals and bioactive molecules.
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Researchers from Nankai University, Sichuan University, and Zhejiang Normal University developed a visible light-driven catalytic strategy for the deracemization of α-aryl cyclic ketones using photocatalysis, hydrogen atom transfer, and chiral phosphoric acid. This method efficiently synthesizes enantiomerically enriched α-aryl cyclic ketones under mild conditions.
Mechanistic studies indicate that conformational changes in the chiral catalyst influence enantioselectivity. The dual role of thiophenols as both Brønsted acid and HAT reagent streamlines the process, enhancing substrate compatibility and functional group tolerance. This innovative approach potentially impacts drug discovery by providing access to optically pure intermediates.
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