Resolution of a cyclopalladated ferrocenylketimine

Abstract

The cyclopalladated ferrocenylketimine, [{Pd[(η⁵-C₅H₅)Fe{η⁵-C₅H₃C(CH₃)N(C₆H₄CH₃-4)}](µ-Cl)}₂] 1 was resolved into optically active diastereomers by using (S)-leucine as chiral auxiliary. The new optically active (S)-leucinato complexes of Pd^II containing ferrocenylketimine could be converted into optically active dimers with the same absolute configurations in the ferrocene moiety. The structure of the chiral dimer (R_p,R_p)-1 was determined by X-ray diffraction, on the basis of which the absolute configurations of all the optically active compounds studied were ascertained.