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Chiral phosphinooxazolines (PHOX ligands), which coordinate to a metal center with a N- and a P-atom, allow effective enantiocontrol in a variety of metal-catalyzed reactions. They are readily synthesized, and because of their modular structure, the steric and electronic properties can be tailored for a specific application by variation of the oxazoline ring, the backbone, and the phosphine moiety.
Helmchen et al. (Fri,) studied this question.