N-Bromosuccinimide-Promoted Cyclization of β-Carboxymethyl Enamino Esters; Synthesis of Functionalized 4-Amino-2(5H)-Furanones - Toum, Valérie; Kadouri-Puchot, Catherine; Hamon, Louis; Lhommet, Gérard; Mouriès-Mansuy, Virginie; Vanucci-Bacqué, Corinne; Dechoux, Luc (Synthesis, 2011)