Azulenes undergo either single or dual S_EAr reactions depending on the nature of the sulfur(IV) electrophile employed. These electrophiles are generated in situ from either sulfoxides or sulfides. The resultant cationic or dicationic azulene products can undergo further derivatisation by means of nucleophilic attack at the sulfonium α-carbon. In the case of cycloalkyl azulenylsulfonium salts, this leads to ring-opened azulenylsulfide products.

中文翻译：

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Azulenesulfonium和azulenebis（sulfonium）盐：通过中断的Pummerer反应形成并随后由亲核试剂衍生化

薁经历单个或配置两个S _Ë取决于（IV）的亲电使用的硫的性质的Ar反应。这些亲电试剂是由亚砜或硫化物原位生成的。所得的阳离子或阳离子型a并产物可以通过对α-碳原子的亲核攻击而进一步衍生。在环烷基氮杂烯基s盐的情况下，这导致开环的氮杂烯基硫产物。