Reactions of 1,3λ⁴δ²,2,4-benzothiadiazines with SCl₂, C₆F₅SCl, and [NS₂][SbF₆] leading to 1,2,3-benzodithiazolium salts (Herz salts) were investigated. The relative rate of reaction with SCl₂ significantly depends on the nature of the substituent and its position in the carbocycle. Halogen substituents Cl, Br, and I slow down the reaction, especially if located closely to the heterocycle (positions 5 and 8). In the case of C₆F₅SCl and R = H, chlorination of the carbocycle and opening of the heterocycle also takes place with the formation of 7-chloro-1,3λ⁴δ²,2,4-benzothiadiazine and C₆F₅–S–N=S=N–Ar (Ar = 2-Cl-6-F₅C₆SC₆H₃), respectively. In the reaction with NS₂⁺, along with contraction of the heterocycle, also its expansion occurs with the formation of 1,2,4λ⁴δ²,3,5-benzotrithiadiazepine.

中文翻译：

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1,3λ4δ2，2,4-苯并二噻二嗪与中性和带电S-亲电试剂的相互作用：SCl 2，C 6 F 5 SCl和NS 2 +

的1,3λ反应⁴ δ ²，2,4- benzothiadiazines SCL为₂，C ₆ ˚F ₅ SCL，和[NS ₂ ] [的SbF ₆ ]导致1,2,3- benzodithiazolium盐（赫茨盐）进行了调查。与SCl ₂的相对反应速率显着取决于取代基的性质及其在碳环中的位置。卤素取代基Cl，Br和I减慢了反应的速度，尤其是如果其紧邻杂环（位置5和8）。在C的情况下，₆ ˚F ₅ SCL和R = H，杂环的碳环和开口的氯化也发生与7-氯1,3λ形成⁴δ ²，2,4-苯并噻二嗪和C ₆ ˚F ₅ -S-N = S = N-Ar（气体的Ar = 2-CL-6-F ₅ C ^ ₆ SC ₆ ħ ₃）表示。与NS反应₂ ⁺，具有杂环的收缩沿，也其扩张与1,2,4λ的形成发生⁴ δ ²，3,5- benzotrithiadiazepine。