4,5-Dihydro-5-diethylamino-1-(p-nitrophenyl)-1,2,3-triazole (3) was obtained in the photolysis of p-nitrophenyl azide (1) in triethylamine (TEA), for which the structure was determined by X-ray crystallographic analysis. The formation of the triazoline 3 is reasonably explained in terms of trapping of N,N-diethylvinylamine (5) generated in situ with the starting azide 1. The reaction sequence involving a single electron transfer from TEA to the electronically excited azide is proposed for the formation of the enamine 5.
对
硝基苯基
叠氮化物 (1) 在
三乙胺 (
TEA) 中光解,得到 4,
5-二氢-5-二乙
氨基-1-(对
硝基苯基)-
1,2,3-三唑 (3),其中通过X射线晶体学分析确定结构。三唑啉 3 的形成可以通过用起始
叠氮化物 1 捕获原位生成的 N,N-二乙基
乙烯基胺 (5) 来合理解释。提出了涉及从
TEA 到电子激发
叠氮化物的单电子转移的反应序列: 5. 烯胺的形成