Thermolysis of Substituted-4H-1,3-Thiazines

Abstract
Thermolysis of 4-dimethylamino-2-phenyl-4-substituted 4H-1,3-thiazines leads to thioamide vinylogs or N-methyl 2H-3,4-dihydrothiazine by thermal rearrangement depending on the nature of the substituents.