Influence of β-arranged substituents in chiral seven-membered rhodium diphosphine rings on asymmetric hydrogenation of amino acid precursors

Article abstract of DOI:10.1016/0022-328X(92)83120-7

Investigations concerning the optical induction in asymmetric hydrogenation reactions confirm the stereochemical control function of mono- and di-substituents in seven-membered chelate ring diphosphines, whereby the bulkiness of substituents in the backbone of the ligands is reflected in higher enantioselectivities.