Controlling Keto–Enol Tautomerism of Ureidopyrimidinone to Generate a Single-Quadruple AADD-DDAA Dimeric Array
作者:Jing Zhang、Shuaiwei Qi、Chenyang Zhang、Zengming Fan、Qinwen Ding、Shizhong Mao、Zeyuan Dong
DOI:10.1021/acs.orglett.0c02644
日期:2020.9.18
Units of ureidopyrimidinone (UPy) which dimerize via strong quadruple hydrogen bonding are widely used for the construction of supramolecular systems. This self-complementary system exists in the tautomerism equilibrium of 4[1H]-pyrimidinone dimer and pyrimidin-4-ol dimer, making generated supramolecular assembly systems essentially complicated. In this contribution, a rational but simple design concept
通过强四重氢键二聚的脲基嘧啶酮(UPy)单元被广泛用于超分子体系的构建。这种自我互补的系统存在于4 [1 H ]-嘧啶酮二聚体和嘧啶丁-4-醇二聚体的互变异构平衡中,使生成的超分子组装系统实质上变得复杂。在此贡献中,描述了一种合理但简单的设计概念,用于通过超分子策略将UPy的自互补四氢键预组织为单四倍DDAA-AADD二聚体阵列。有了这个概念,设计的UPy导数仅形成4 [1 H从单晶X射线衍射和1 H NMR光谱中可以看出,在固态和溶液状态下,通过分子间氢键相互作用的具有酮构型的]-嘧啶酮二聚体。单个DDAA-AADD二聚体阵列提供了确定的非共价驱动力,可用于生成结构清晰的超分子结构,这在超分子化学和材料领域至关重要。