On the Reaction of 1,3-Dichloro-2-azoniaallene Salts with Isocyanates and Carbodiimides
作者:Abdel-Hamid Ismail、Atef Hamed、Martin G. Hitzler、Carsten Troll、Johannes C. Jochims
DOI:10.1055/s-1995-3995
日期:1995.7
1,3-Dichloro-2-azoniaallene salts 1 react with one or two equivalents of isocyanates 2 to afford nitrilium salts 4, together with allophanoyl chlorides 5 or carbamoyl chlorides 8. The chlorides 5 and 8 were characterized by their reactions with nitrogen nucleophiles (products 10-12, 14). With antimony pentachloride, the allophanoyl chlorides 5 cyclize to 2-chloro-substituted 1,3,5-oxadiazinium salts 13. The chloro-substituted 2-azoniaallene salt 15 was obtained from the reaction of 8f with a ketone in the presence of antimony pentachloride. The 1,3-diaryl-1,3-dichloro-2-azoniaallene salt 1f adds to carbodiimides 16 to form labile 2,2-dichloro-1,3,5-triazinium salts 17, which were characterized as derivatives 18-20.
1,3-二氯-2-氮杂萘盐 1 与 1 或 2 等量的异氰酸酯 2 反应,生成亚硝基鎓盐 4 以及别甲酰氯 5 或氨基甲酰氯 8。氯化物 5 和 8 的特征在于它们与氮亲核物的反应(产物 10-12、14)。在五氯化锑的作用下,别甲酰氯 5 环化生成 2-氯代 1,3,5-恶二嗪盐 13。在五氯化锑存在下,8f 与酮反应生成氯代 2-氮杂萘盐 15。1,3-二芳基-1,3-二氯-2-氮杂烯盐 1f 与碳化二亚胺 16 相加,形成易变的 2,2-二氯-1,3,5-三嗪盐 17,其特征为衍生物 18-20。