Rearrangement and cyclization of a series of p-nitrophenyl and heteroaryl thiohydrazonates ArSCAr′ = NNHC6H3XY(2,4), where the displaced substituent X is Br or F and the remaining substituent Y is Br or NO2, occurs under suitable basic conditions to the corresponding 7-substituted 2-aryl-4-p-nitrophenyl- and -4-heteroaryl-4H-1,3,4-benzothiadiazines, e.g. 13 → 19. Under these or suitable acidic conditions, the 4,6-dimethyl-2-pyrimidinyl thiohydrazonate rearranges to the thiohydrazide Ar′CSNHNArC6H3XY(2,4), apparently the first case of thiohydrazonate thiohydrazide rearrangement; such acidic treatment produces cleavage of some other heteroaryl thiohydrazonates.Independent syntheses of two of the 4-heteroaryl-substituted benzothiadiazines are reported. 
 
                                    一系列对
硝基苯基和杂环
硫酰
肼酸酯ArSCAr′ = NNNHC6H3XY(2,4)的重排和环化,在适当的碱性条件下发生,形成相应的7-取代2-芳基-4-对
硝基苯基-和-4-杂环-4H-1,3,4-苯并噻二嗪,例如13 → 19。在这些或适当的酸性条件下,4,6-二甲基-2-
嘧啶基
硫酰
肼酸酯重排为
硫酰
肼酰基Ar′CSNHNArC6H3XY(2,4),似乎是
硫酰
肼酸酯
硫酰
肼酰基重排的第一个案例;这种酸性处理会引起其他一些杂环
硫酰
肼酸酯的断裂。报道了两种4-杂环取代苯并噻二嗪的独立合成。