Dendritically Cross-Linking Chiral Ligands: High Stability of a Polystyrene-Bound Ti-TADDOLate Catalyst with Diffusion Control.

ABSTRACT

A new type of heterogeneous, polystyrene-bound catalyst is introduced A cross-linking, dendritic ligand, the TADDOL 1, is copolymerized with styrene, loaded with titanate, and used for the enantioselective catalysis of the addition of Et2Zn to PhCHO. The polymer-bound catalyst has an unprecedented efficiency and stability in multiple applications.