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A second generation of phosphine–phosphite (P–OP) ligands, incorporating a more sterically bulky phosphite group than previous P–OP ligand designs, gave very efficient catalysts for the Rh‐catalysed asymmetric hydrogenation of a diverse array of substrates (11 examples, 93–99 % ee) containing structurally diverse substituents and chelating groups at the C=C double bond. The presence of the sterically...
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