Deprotonation and Subsequent Functionalization of Methyl Groups in Cationic Ruthenium Triple-decker Complexes

Triple-decker transition metal complexes bridged by a single carbocyclic ring

“…n BuLi-t BuOK) to give the deprotonated form [62]. This can then be trapped by a suitable electrophile, yielding substituted versions of 7.…”

Ruthenocenes and Osmocenes

“…Similar reactions of [CpRuCp*RuCp*] + were unselective, resulting in both deprotonation of a methyl group and metallation of the Cp group; for example, alkylation with Mel gave a mixture of [(Ti-C 5 H 4 Me)RuCp*RuCp*] + and [CpRuCp*Ru(r|-C 5 Me 4 Et)] + . 203 Reaction of [Ru(u-OMe)Cp*] 2 with tetramethylcyclopentenone in the presence o f TfOH gave [Cp*(|a-r| 5 :r| 5 -C 5 Me 4 OH)RuCp*][OTf] in 90% yield, probably by [RuCp*] + -induced dehydrogenation of the cyclopentenone and subsequent two-electron reduction. The central ligand is best described as a C 5 Me 4 0H anion, hydrogen bonded to the triflate anion.…”