The addition of diethylzinc to aromatic aldehydes in the presence of catalytic amounts of enantiomerically pure hydroxymethyl oxazolines affords the corresponding secondary alcohols with modest levels of asymmetric induction.
Allen, J. V., Frost, C. G., & Williams, J. M. J. (1993). Asymmetric addition of diethylzinc to aromatic aldehydes using enantiomerically pure hydroxymethyl oxazoline ligands. Tetrahedron: Asymmetry, 4(4), 649-650. https://doi.org/10.1016/S0957-4166(00)80170-6