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PNNP Macrocycles: A New Class of Ligands for Asymmetric Catalysis

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posted on 09.03.2009 by Marco Ranocchiari, Antonio Mezzetti
We report the first examples of enantiomerically pure P2N2 macrocycles containing either a diimino (1a) or diamino donor set, as well as their ruthenium(II) dichloro complexes. Unexpectedly, the diimino derivative 2a is a more efficient catalyst in the transfer hydrogenation of acetophenone than its diamino analogue.

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