New Chiral C₃‐Symmetric Tripodal Phosphanes

Compared to bidentale chiral ligands with C2 symmetry, tridentate ligands with C2 symmetry give rise to a reduced number of non-equivalent residual coordination sites in octahedral transition metal complexes. Hence, an increased enantioselectivity can be expected in catalytic reactions. The tripod ligands 1 and 2, which are readily accessible from 2,5-dimethyl-l- phenylphospholanes, have been examined as ligands in Rh complexes.