X-Ray characterization of enantiomerically pure 1,1′-diphenyl-3,3′,4,4′-tetramethyl-2,2′-biphosphole: a ligand with axial and central chirality
摘要:
The stereochemical analysis and characterization of diastereoisomers of 1,1'-diphenyl-3,3',4,4-tetramethyl-2,2-biphosphole having axial and central chirality reveal the potential interest of this ligand for asymmetric catalysis.
which presents axial chirality generated by the biphosphole framework and central chiralities due to the phosphorus atoms leads to the existence of six stereoisomers corresponding to three pairs of enantiomers which have been fully characterised by X-ray diffraction studies. Among these three diastereoisomers, one has a favourable configuration for chelating metals. The synthesis and structure of numerous