An Easy and Versatile Procedure for the Synthesis of N’-Trifluoromethylsulfonylurea (N’-Trifluoromethylsulfonylcarbamimidic Acid) Derivatives - Martínez, A García; Fernández, A Herrera; Jiménez, F Moreno; Ruiz, P Martínez; Subramanian, L R (Synlett, 1995)