作者:Akira Sera、Kuniaki Itoh、Hiroshi Yamada、Ryuichi Aoki
DOI:10.1246/bcsj.54.3453
日期:1981.11
The photolysis of N,N′-dibromo-2,5-piperazinedione in dichloromethane gave an unstable photoproduct. The alcoholysis of the photoproduct in the presence of a small amount of hydrogen bromide yielded 3,6-diethoxy-2,5-piperazinedione and its alcoholyzed products, ethyl diethoxyacetate, ethyl 2-(diethoxyacetylamino)-2-ethoxyacetate, N-(1-ethoxy-1-ethoxycarbonylmethyl)oxamide, and ethyl N-(diethoxyacetyl)glycinate. The reactions of the photoproduct with other nucleophiles also gave the corresponding substituted 2,5-piperazinediones. The structure of the primary photoproduct was deduced to be 3,6-dibromo-2,5-piperazinedione on the basis of these observations.
在二氯甲烷中对N,N′-二溴-2,5-哌嗪二酮的光解反应产生了一个不稳定的光产物。在少量溴化氢存在下,对光产物进行醇解反应,得到3,6-二乙氧基-2,5-哌嗪二酮及其醇解产物,分别是乙基二乙氧基乙酸酯、乙基2-(二乙氧基乙酰氨基)-2-乙氧基乙酸酯、N-(1-乙氧基-1-乙氧基羧甲基)氧氨基和乙基N-(二乙氧基乙酰)甘氨酸。光产物与其他亲核试剂的反应也产生了相应的取代2,5-哌嗪二酮。根据这些观察,初级光产物的结构被推测为3,6-二溴-2,5-哌嗪二酮。