Highly Efficient Synthesis of a Class of Novel Chiral-Bridged Atropisomeric Monophosphine Ligands via Simple Desymmetrization and Their Applications in Asymmetric Suzuki–Miyaura Coupling Reaction
A series of novel chiral-bridged atropisomeric monophosphine ligands were synthesized via convenient and simple pathways. The prepared ligands, especially for ligand 7d, were found to be highly effective in the Pd-catalyzed Suzuki–Miyauracouplingreaction. The steric hindrance and electronic effect of substrates on the reactivity and enantioselectivity were explored preliminarily.
atropisomeric bridged P,N‐ligands were prepared using a highly efficient central‐to‐axial transfer strategy as the protocol. The new chiral ligands were successfully applied in the palladium‐catalyzed asymmetricSuzuki–Miyauracoupling reaction, Up to 98% yield and 82% ee were obtained in the enantioselectivesynthesis of axiallychiralbiarylphosphonates.
Synthesis of Chiral-Bridged Atropisomeric Monophosphine Ligands with Tunable Dihedral Angles and their Applications in Asymmetric Suzuki-Miyaura Coupling Reactions
construction of diastereomeric biaryl monophosphines by means of the substrate-directed asymmetric annulation reactions. A series of new chiral-bridged atropisomeric biphenyl monophosphine ligands with tunable dihedral angles was accordingly synthesized successfully without a resolution step being needed. Using these ligands, different kinds of axially chiral 1,1′-biaryl-2-phosphonates including the first