Abouelfida, Abdesselam; Roze, Jean-Claude; Pradere, Jean-Paul, Phosphorus, Sulfur and Silicon and the Related Elements, 1990, vol. 54, # 1/4, p. 123 - 134
Selective reduction of 4H-1,3-thiazine-4-ones leads to new substituted6H-1,3-thiazines. The isomerisation from 6-to 5-methoxycarbonyl-6H-1,3-thiazines via substituted 4-acetoxy-1-thia-3-aza-butadienes by a cycloreversion-cycloaddition process can be performed in one step.