Triarilfosfine chirali a simmetria C3 come leganti di metalli per la preparazione di catalizzatori per reazioni stereoselettive

The invention refers to the synthesis of some chiral C3 symmetric tris-arylphosphines, tris-heteroarylphosphines in particular, characterized by three identical aryl rings, and to their use as ligands of transition metals for preparing complexes to be emplpyed as homogeneous catalysts in stereoselective reactions. The stereogenic element responsible for enantiofacial recognition is considered to be the helix typical of these three-bladed propellers. A specific helical configuration can be induced either by supplementary stereochemically defined homotopic stereogenic elements present on the aromatic rings or by the correlated rotation of the rings around the carbon-phosphorus bond.