By Hale G. E.
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These differences in selectivity are probably due to the steric and electronic properties of the biaryl backbone of these ligands [93b]. The hydrogenation of β-substituted itaconic acids and derivatives is more difﬁcult. 19). 4 Reduction of itaconic acids. Substrate Catalyst H2 (bar) ee % Conﬁguration Ref. 20 with Rh-Me-Duphos in which a trisubstituted oleﬁn is reduced to afford a chiral succinate . 1 Mechanistic Aspects of the Ru-(BINAP)-Catalyzed Hydrogenation of Carboxylic Acids Several groups, most notably those of Noyori , Halpern et al.
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