Synthesis and spectroscopic investigation of substituted piperazine-2,5-dione derivatives
作者:Craig D. Stewart、Nicholas G. White、Russell A. Barrow、Tristan A. Reekie
DOI:10.1016/j.tet.2024.133838
日期:2024.3
methods for accessing substituted piperazine-2,5-diones involve cyclising dipeptides or building from the already established core. Utilising the latter method, we have developed procedures to condense a variety of methoxylated benzaldehydes to exclusively form ()-(benzylidene)piperazine-2,5-diones . This method can easily be utilised to form both homo- and heterodimeric substituted piperazine-2,5-diones
哌嗪-2,5-二酮部分是用于功能化以产生生物活性分子的有用支架。获得取代的哌嗪-2,5-二酮的合成方法涉及环化二肽或从已经建立的核心构建。利用后一种方法,我们开发了将各种甲氧基化苯甲醛缩合以专门形成()-(亚苄基)哌嗪-2,5-二酮的程序。该方法可以很容易地用于形成同二聚体和异二聚体取代的哌嗪-2,5-二酮。将这些化合物进行氢化得到两种异构体。我们详细介绍了简单的核磁共振分析,可以识别 或 异构体。这些分析与 X 射线晶体学相结合表明,在所用的氢化条件下,异构体形成为主要产物。合成方法与光谱分析相结合,为我们提供了对 2,5-哌嗪二酮性质的宝贵了解。