commercially available [Ru(p-cymene)Cl2]2 and 1,4-bis(diphenylphosphino)butane catalyzes the racemization of aromatic α-hydroxy ketones very efficiently at room temperature. The racemization is fully compatible with a kineticresolutioncatalyzed by a lipase from Pseudomonas stutzeri. This is the first example of dynamickineticresolution of α-hydroxy ketones at ambient temperature in which the metal and enzyme