Enantioselective Synthesis of Planar Chiral [Cr(η6‐Arene)(CO)3] complexes via nucleophilic addition/hydride abstraction. Preliminary communication

Non‐racemic, planar chiral 1, 2‐disubstituted [Cr(η6‐arene)(CO)3] complexes were obtained via external chiral ligand‐controlled nucleophilic addition of alkyl‐, vinyl‐, and aryllithium reagents to monosubstituted complexes followed by an endo‐hydride abstraction with trityl cation. The reactions with [Cr(CO)3(η6‐phenyloxazoline)], [Cr(CO)3(η6‐phenylmethaneimine)], and [Cr(CO)3 (η6‐phenylmethanenydrazone)] took place with complete ortho‐selectivity and a high degree of enantioselectivity (up to 98% ee).