Stereoselective nucleophilic addition of potassium alkyltrifluoroborates to cyclic N-acyliminium ions: a simple and mild approach to chiral 5-alkyl-pyrrodin-2-ones - Vieira, Adriano Siqueira; Ferreira, Fernando P.; Guarezemini, Alexandre Sardelli; Stefani, Hélio Alexandre (Australian Journal of Chemistry, 2009)