Efficient Route to Atropisomeric Ligands – Application to the Synthesis of MeOBIPHEP Analogues
作者:Lucie Leseurre、Florent Le Boucher d’Herouville、Kurt Püntener、Michelangelo Scalone、Jean-Pierre Genêt、Véronique Michelet
DOI:10.1021/ol2011874
日期:2011.6.17
A highly efficient Pd-catalyzed P-C coupling reaction of easily accessible atropisomeric bisphosphane is described in the presence of various electron-poor aromatic iodides. The reactions are conducted in the presence of a Pd(II)/dppf catalyst in acetonitrile at 80 degrees C. The reaction conditions are compatible with several electron-withdrawing groups such as esters, cyano, chloro, and trifluoromethyl groups and lead to atropisomeric MeOBIPHEP derivatives in good to excellent yields and high enantiomeric purities.