Palladium(II)–allyl complexes containing chiral N-donor ferrocenyl ligands

摘要: A study of the reactivity enantiopure ferrocenylimine ( S C )-[FcCH N–CH(Me)(Ph)] {Fc =  (η 5 -C H )Fe{(η 4 )–} 1a ) with palladium(II)–allyl complexes [Pd(η 3 -1R 1 ,3R 2 )(μ-Cl)] {R  = H and R ), Ph or  = R  = Ph )} is reported. Treatment {in a molar ratio Pd(II):  = 1} in CH Cl at 298 K produced -3R ){FcCH N–CH(Me)(Ph)}Cl] 5a 6a )}. When reaction was carried out under identical experimental conditions using complex as starting material no evidence for formation -1,3-Ph 7a found. Additional studies on N–CH(R )(CH OH)]  = Me 1b CHMe 1c showed importance bulk substituents palladium(II) allyl–complex – ferrocenylimines this type reaction. The crystal structure that: (a) adopts an anti -( E conformation behaves N-donor ligand, (b) chloride cis -arrangement to nitrogen (c) allyl group binds η -fashion. Solution NMR N–CH(Me)(CH OH)}Cl] 7b revealed coexistence several isomers solution. stoichiometric between sodium diethyl 2-methylmalonate reveals that achiral linear trans isomer Ph–CH CH–CH Nu 8 preferred over branched derivative 9 ). comparative potential utility ligand , amine )-H N–CH(Me)(Ph) 11 catalysts allylic alkylation )-3-phenyl-2-propenyl cinnamyl acetate nucleophile (Nu −