Chiral ionic phosphites and diamidophosphites: A novel group of efficient ligands for asymmetric catalysis

Seven members of a new class of chiral P-monodentate cationic phosphites and diamidophosphites have been synthesized for the first time and tested as ligands in asymmetric transition metal catalysis. Up to 96 % ee was achieved in the rhodium-catalyzed asymmetric hydrogenation of functionalized olefins and up to 99 % ee in the palladium-catalyzed allylic allylation. Applications of the immobilized cationic rhodium complex to asymmetric catalytic synthesis have also been demonstrated.

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