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New modular P-chiral ligands have been prepared from commercially available (S)-α,α-diphenylprolinol. With these new types of ligands, up to 95% ee was achieved in the Rh-catalyzed asymmetric hydrogenation of functionalized olefins.
Double lithiation of bis(tetra-hydroindenyl)iron followed by phosphorylation using Ph 2 PCl affords two different chiral diphosphines having respectively C 1 - and C 2 -symmetry. Following antipode separation, the compounds can be used as ligands in Rh-catalyzed hydrogenation (up to 97% ee) and hydroboration (up to 84% ee) of olefins and in Ir-catalyzed hydrogenation of imines...
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