The formation of novel chiral bidentate phosphoroamides structures able to promote Lewis base-catalyzed Lewis acid-mediated reactions was investigated. Two different classes of phosphoroamides were synthetized: the first class presents a phthalic acid/primary diamine moiety, designed with the aim to perform a self-assembly recognition process through hydrogen bonds; the second one is characterized
Interligand hydrogen bonding of chiral monodentate phosphite ligands bearing H‐bond donor and acceptor groups leads to formation of supramolecular bidentate ligands, rhodium complexes of which (see picture) afford excellent enantiomeric excesses in catalyzed hydrogenation of classical benchmark and industrially relevant substrates. cod=1,5‐cyclooctadiene.
in four steps. These newligands were screened in the rhodium‐catalyzed enantioselective hydrogenation of prochiral dehydroamino esters and enamides. Several members of the library showed excellent enantioselectivity with methyl 2‐acetamido acrylate (6 ligands gave >97 % ee), methyl (Z)‐2‐acetamido cinnamate (6 ligands gave >94 % ee), and N‐(1‐phenylvinyl)acetamide (9 ligands gave >95 % ee), whilst