Asymmetric catalytic Mannich-type reaction of hydrazones with difluoroenoxysilanes using imidazoline-anchored phosphine ligand–zinc(II) complexes†

Asymmetric Mannich-type reaction of hydrazones with difluoroenoxysilanes using chiral zinc(II)–imidazoline–phosphine complexes as catalysts have been established, giving the corresponding adducts in good to excellent enantioselectivity and chemical yields under mild conditions.