Cationic Planar Chiral (η<sup>6</sup>-Arene)Mn(CO)<sub>3</sub><sup>+</sup> Complexes: Resolution, NMR Study in Chiral-Oriented Solvents, and Applications to the Enantioselective Synthesis of 4-Substituted Cyclohexenones and (η<sup>6</sup>-Phosphinoarene)Mn(CO)<sub>3</sub><sup>+</sup> Complexes
cationic (η6-arene)Mn(CO)3+ complexes is the base of the strategy adopted for the first resolution of such complexes. X-ray structures of one of the (η5-cyclohexadienyl)Mn(CO)3 diastereoisomers obtained after addition of the chiral auxiliary as well as of the corresponding enantiopure η6 cationic complex after rearomatization have been established. Proton-decoupled deuterium 2D NMR in chiral polypeptide liquid
Resolution of Planar Chiral Cationic (η<sup>6</sup>-Arene)tricarbonylmanganese Complexes
作者:Antoine Eloi、Françoise Rose-Munch、Eric Rose
DOI:10.1021/ja905712k
日期:2009.10.14
This contribution describes the first resolution of cationic (eta(6)-arene)Mn(CO)(3) complexes through addition of d-(+)-camphor enolate, isomerization of the stereogenic center, and separation and recrystallization of the corresponding eta(5) diastereoisomers followed by rearomatization and elimination of the chiral auxiliary. This general unprecedented chiral nucleophile addition/elimination (et