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Chirality3: A new ferrocene-based diphosphine ligand is applied to the asymmetric hydrogenation of α-substituted cinnamic acids. The P-centered-, C-centered-, and planar-chiral ligand (RC,RC,SFc,SFc,SP,SP)-1 displays unprecedented enantioselectivity in this Rh-catalyzed reaction (see scheme; cod=cycloocta-1,5-diene).
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Chen et al. (2007) studied this question.
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