An Improved Synthesis of 2H-1,2,6-Thiadiazine 1,1-Dioxides by Condensation of β-Amino and β-Chloro α,β-Unsaturated Ketones with Sulfamides - Alberola, Angel; Andrés, José M; González, Alfonso; Pedrosa, Rafael; Vicente, Martina (Synthesis, 1991)