Efficient Preparation of ortho-Aminobenzenesulfonamides using Ligand-Free Copper(I)-Catalyzed Amination - Bahlaouan, Zineb; Thibonnet, Jérôme; Duchêne, Alain; Parrain, Jean-Luc; Elhilali, Mostafa; Abarbri, Mohamed (Synlett, 2011)