Phosphorus(III)-Compatible Asymmetric Suzuki-Miyaura Cross-Coupling (P-ASMC) Reaction

Area of Science:

• Organic Chemistry
• Catalysis
• Asymmetric Synthesis

Background:

• The Suzuki-Miyaura cross-coupling (SMC) is vital for biaryl synthesis.
• Enantioselective SMC typically requires external chiral ligands.
• Phosphorus(III) compounds pose challenges due to strong metal coordination.

Purpose of the Study:

• To develop a P(III)-compatible asymmetric Suzuki-Miyaura cross-coupling (P-ASMC) reaction.
• To enable one-step synthesis of axially chiral biaryl monophosphines.
• To identify key factors for reaction efficiency and enantioselectivity.

Main Methods:

• Utilized a palladium catalyst with achiral and chiral phosphine ligands.
• Coupled ortho-bromo-substituted arylphosphines with aryl boronate esters.
• Conducted experimental and computational studies to elucidate reaction mechanisms.

Main Results:

• Achieved high reactivity and enantioselectivity in the P-ASMC reaction.
• Successfully synthesized axially chiral biaryl monophosphines in one step.
• Demonstrated the efficacy of the synthesized atropisomers as ligands in various metal catalysis.

Conclusions:

• The P-ASMC reaction provides a novel route to valuable chiral phosphine ligands.
• The developed method overcomes previous limitations in coupling phosphorus(III) compounds.
• The synthesized ligands show broad applicability in enantioselective catalysis.