This paper describes the synthesis of 3-(3-t-butoxypropyl)-6-hydroxy-2,5-piperazinedione derivatives by the hydroxylation of the corresponding 2,5-piperazinedione with N-bromosuccinimide (NBS) in the presence of water and the subsequent cyclization to 2-oxa-7,9-diazabicyclo[4.2.2]decane-8,10-dione derivatives (11). The reversible interconversion between the spiro[oxolane-2,2′-piperazine]-3′,6′-dione prepared previously and the bicyclo compound 11 was established. The formation mechanisms and the structural confirmation of 11 and the other products are discussed.
本文介绍了 3-(3-t-丁氧基丙基)-6-羟基-2,5-
哌嗪二酮衍
生物的合成方法,即在
水的存在下,用 N-
溴代丁二
酰亚胺(
NBS)对相应的 2,5-
哌嗪二酮进行羟基化反应,然后环化成 2-氧杂-7,9-二
氮杂双环[4.2.2]
癸烷-8,10-二酮衍
生物 (11)。之前制备的螺[氧杂环-2,2′-
哌嗪]-3′,6′-二酮与
双环化合物 11 之间的可逆相互转化得到了证实。本文讨论了 11 及其他产物的形成机理和结构确认。