Asymmetric exchange of cyclopalladated ligands with a high level of asymmetric induction: a new route to optically active phosphapalladacyclesстатья
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Аннотация:The first example of an asymmetric C-H bond activation with chirality transfer (up to 91% ee) from an enantiopure CN-palladacycle is described. This asymmetric version of cyclopalladated ligand exchange was elaborated in an aprotic medium using prochiral phosphines as substrates and an enantiopure benzylaminate palladacycle bearing a primary amino group and a bulky tert-Bu substituent on the side chain as the palladation agent. (C) 2003 Elsevier Ltd. All rights reserved.