M. Shimizu et al., Reductive aldol reaction of alpha-imino esters promoted by titanium tetraiodide: Selective synthesis of alpha-amino-beta-hydroxyesters, CHEM LETT, (11), 2001, pp. 1196-1197
Under the influence of titanium tetraiodide reductive aldol reaction of N-t
osylimines, derived from ethyl glyoxylate, with aldehydes proceeded to give
alpha -amino-beta -hydroxyesters in good yields.