A Convenient Synthetic Method for Fully Conjugated 3-Alkyl- and 3-Aryl-5-trifluoromethyl-1-methyl-1,2-thiazine 1-Oxide from β-Alkoxyvinyl Trifluoromethyl Ketones - Bonacorso, Helio G; Bittencourt, Sandra R T; Lourega, Rogério V; Flores, Alex F C; Zanatta, Nilo; Martins, Marcos A P (Synthesis, 2000)