Diastereoisomerically pure planar-chiral cyclopentadienyl-metal complexes, 3 and 4, are prepared by the reaction of the cyclopentadiene 2 having a (–)-menthyl group with FeCl2 or [Rh(cod)Cl]2(cod = cylcloocta-1,5-diene); removal of the (–)-menthyl group from 4 affords the first optically pure enantiomers, (+)-5 and (–)-5.
M. Uno, K. Ando, N. Komatsuzaki and S. Takahashi, J. Chem. Soc., Chem. Commun., 1992, 964 DOI: 10.1039/C39920000964
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