Alberico, Elisabetta and Nieddu, Ilenia and Taras, Rossana Maria and Gladiali, Serafino Gabriele (2006) Expanding the scope of atropisomeric monodentate P-Donor ligands in asymmetric catalysis: hydrogen-transfer reduction of α,β-unsaturated Acid Derivatives by Rhodium/Ph-binepine Catalysts. Helvetica Chimica Acta, Vol. 89 (8), p. 1716-1729. eISSN 1522-2675. Article.
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A range of α,β-unsaturated acids and esters have been selectively reduced to the corresponding saturated acid derivatives by hydrogen transfer. As the reducing agent, formic acid was used in the presence of RhI complexes formed with the powerful chiral ligand Ph-binepine, an axially chiral binaphthalenetype monodentate P-donor ligand. Very high stereoselectivities (up to 97% ee) were obtained in the case of itaconic acid.
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