Unexpected Formation of Optically Active 4-Substituted 5-Hydroxy-γ-lactams by Organocatalyzed Reaction of 3-Substituted Cyclobutanones with Nitrosobenzene - Capitta, Francesca; Frongia, Angelo; Ollivier, Jean; Piras, Pier Paolo; Secci, Francesco (Synlett, 2011)