1,3-Thiazines and benzothiazines and their reduced forms

This chapter organizes the established pattern, that is, the compounds are listed in an order according to the number of double bonds in the heterocycles. “1, 3-thiazane” is described in this chapter. The synthesis and reactions of thiazinium salts are discussed. The compounds 2H-1, 3-thiazines, 4H-1, 3-thiazines (1, R=H), and 6H-1, 3-Thiazines, are discussed for synthesis, reactions and physical methods. The chapter illustrates that 6H-1, 3-thiazines react with a variety of nucleophiles. The section on thiazinones, thiones and imines are discussed and illustrationed. The compounds containing banzothiazines; 1, 3-benzothiazinediones; thiones and imines; 4H-3; 1-benzothiazines; and benzothiazones are presented. The perhydrobenzothiazines and related compounds—namely, perhydrothiazines, perhydro-3, 1-benzothiazin-2-ones are explained for the conformational effects because they show similar behavior.