作者:Yaseen A. Al-Soud、Prativa Bade Shrestha-Dawadi、Martin Winkler、Wolfgang Wirschun、Johannes C. Jochims
DOI:10.1039/a804116d
日期:——
Azomethines undergo nucleophilic addition to 1-aza-2-azoniaallene salts 7 to furnish N-(azoalkyl)iminium salts (e.g. 10, 12, 13). With cyclic hydrazones such as pyrazole or indazole, heterocumulenes 7 afford bicyclic 1,2,4,5-tetrazinium salts (e.g. 14, 16), or simple N-adducts such as 15, 17. On the other hand, with open-chain hydrazones azinium salts 19 are formed. Benzotriazole and the aziridine 21 react with 1-aza-2-azoniaallene salts 7 to afford (azoalkyl)ammonium salts 20, 22. The heterocumulenes 7 undergo cycloaddition across the CN double bond of the azirine 23 to furnish azirenotriazolium salts 25, while with the 1-aza-2-azoniaallene salt 3a the triazolium salt 28 was formed. The constitutions of compounds 22, 25a and 28 were confirmed by X-ray structural analyses.
偶氮亚甲基与 1-aza-2-azoniaallene 盐 7 发生亲核加成反应,生成 N-(偶氮烷基)亚铵盐(如 10、12、13)。与环状肼(如吡唑或吲唑)一起,杂茂烯 7 可生成双环 1,2,4,5-四嗪盐(如 14、16)或简单的 N-加成物(如 15、17)。另一方面,开链肼会形成唑盐 19。苯并三唑和氮丙啶 21 与 1-aza-2-azoniaallene 盐 7 反应生成(偶氮烷基)铵盐 20、22。杂茂烯 7 通过氮丙啶 23 的 CN 双键发生环化反应,生成氮氮三唑鎓盐 25,而与 1-aza-2-azoniaallene 盐 3a 反应则生成三唑鎓盐 28。化合物 22、25a 和 28 的结构已通过 X 射线结构分析得到证实。