NONLINEAR EFFECTS IN ASYMMETRIC CATALYSIS - SOME RECENT ASPECTS

Some basic definitions and principles dealing with nonlinear effects a re recalled. Examples of amplification or depression of the expected e e of the product are presented for some catalytic reactions involving organometallic complexes with chiral ligands. A mathematical model has been set up in order to analyze various situations and to make some p redictions. The special case of mixtures of diastereomeric ligands hav ing pseudo-enantiomeric relationships is discussed. Finally, an exampl e of nonlinear effects in stoichiometric asymmetric synthesis is descr ibed in the case of the asymmetric reduction of acetophenone by Ipc(2) BCl.