摘要:
                                Reaction of [Cp*RuOMe](2) (1) with either enantiomer of the naturally occurring ketonic diterpene carvone or the trimethylsilyl enolate derived thereof leads to homochiral Cp*Ru-pi-complexes 6-9, where the Cp*Ru moiety is bound to either the exocyclic double bond or an allyl function derived from it as well as to an enone or ene system in the ring. Full aromatization of the cyclic enone under the same reaction conditions was achieved with 7,8-dihydrocarbone or its trimethylsilyl enolate, respectively, giving complexes 13 and 14. The carvacrole complex 14 (and consequently also 13) is shown by the NMR spectra of the diasteroisomers obtained through derivatization with (S)-camphorsulfonic acid to be homochiral, thus, central chirality of the carvone has been fully transformed into planar chirality of the carvacrole complex. Compounds 6, 7 . BFB4 7 . CF3SO3, and 8 . CF3SO3, and 14 . CF3SO3 where characterized by single-crystal X-ray analysis, which allowed for the determination of the absolute configuration of the latter.