A Broadened Scope for the Use of Hydrazones as Neutral Nucleophiles in the Presence of H-Bonding Organocatalysts - Pettersen, Daniel; Herrera, Raquel P; Bernardi, Luca; Fini, Franscesco; Sgarzani, Valentina; Fernandez, Rosario; Lassaletta, José M; Ricci, Alfredo (Synlett, 2006)