Einfluesse von in para-Position zum Phosphor eingefuehrten Substituenten in das Diop-System auf die optische Induktion bei der asymmetrischen Hydrierung von Acylaminoacrylsaeureethylester und (Z)-Acylamino-zimtsaeuremethylester mit kationischen Rhodium-(Diop-Derivat)-Komplexen. I

Article abstract of DOI:10.1016/0022-328X(89)87124-4

(R,R)-Diop was modified at the diphenylphosphino group by the introduction of substituents in para-position to the phosphorus atoms.The influence of the substituents on the optical induction was examined for the hydrogenation of ethyl α-acylaminoacrylate (AAEE) and (Z)-methyl α-acylaminocinnamate (AZME) with ⁺ BF4^- as catalyst.For both substrates the substituents affected the optical induction markedly.The observed effects can be attributed to the electronical features, solvation and in special cases also to the size of the substituents.