“…Stabilized carbanions that have been added onto (η 6 -arene)Fe + Cp complexes include ketone enolates and nitrile stabilized anions . More than 20 years ago, Sutherland and co-workers reported the addition of the acetonyl anion by reaction of complexes 281 of arenes bearing electron-withdrawing substituents with acetone in the presence of aqueous KOH. − Interestingly, high ortho selectivity (with respect to the electron-withdrawing group) was observed even in the case of highly hindered 2,6-dimethyl substituted compounds (Scheme ). In a related approach, the acetonyl anion was also reported to react with heterocyclic complexes 282 . , Selective addition was observed for the metal complexed ring; addition was again ortho to the carbonyl group.…”