Comparison of yttrium binaphthylamido alkyl and amide complexes for enantioselective intramolecular hydroamination

A chiral trisamido yttrium complex Y[(R)-C20H12(NC5H9)2][NiPr2][THF]2·LiCl coordinated by N-cyclopentyl binaphthylamine ligand has been prepared in situ and characterised by NMR spectroscopy. It has been revealed as an efficient catalyst for intramolecular hydroamination of aminoolefins. Comparison with neutral alkyl, ate alkyl or ate tetraamido complexes coordinated by the same ligand indicated that this complex was the most efficient catalyst of the series for its both activity and enantioselectivity values.