A Novel Class of P−O Monophosphite Ligands Derived from <scp>d</scp>-Mannitol: Broad Applications in Highly Enantioselective Rh-Catalyzed Hydrogenations
on a new class of P−O monophosphite ligands (designated 3a−k) with a double six-membered-ring backbone onto which are attached additional groups and on applications of their Rh complexes in the hydrogenation of enamides, α-dehydroamino acid esters, dimethyl itaconate, and β-(acylamino)acrylates. Our results demonstrate that the Rh complexes with ligands 3a−k exhibit high enantioselectivity and reactivity