Ghp. Roos et S. Balasubramaniam, Diastereoselective addition of imidazolidin-2-one controlled enolates to activated imines, SYN COMMUN, 29(5), 1999, pp. 755-762
Ephedrine-based imidazolidin-2-one chiral auxiliaries afford good syn stere
oselectivity in the addition of their derived titanium enolates with an act
ivated imine system. This provides entry into beta-amino acid systems.