Lateral Metallation and Redistribution Reactions of Sodium Ferrates Containing Bulky 2,6-Diisopropyl-N-(trimethylsilyl)anilide Ligands.

Alkali-metal ferrates containing amide groups have emerged as regioselective bases capable of promoting Fe-H exchanges of aromatic substrates. Advancing this area of heterobimetallic chemistry, a new series of sodium ferrates is introduced incorporating the bulky arylsilyl amido ligand N(SiMe )(Dipp) (Dipp=2,6-iPr -C H ). Influenced by the large steric demands imposed by this amide, transamination of [NaFe(HMDS) ] (HMDS=N(SiMe ) ) with an excess of HN(SiMe )(Dipp) led to the isolation of heteroleptic [Na(HMDS) Fe{N(SiMe )Dipp}] (1) resulting from the exchange of just one HMDS group.