Structural and Conformational Studies on Carboxamides of 5,6-Diaminouracils—Precursors of Biologically Active Xanthine Derivatives
作者:Daniel Marx、Gregor Schnakenburg、Stefan Grimme、Christa E. Müller
DOI:10.3390/molecules24112168
日期:——
8-Arylethynylxanthine derivatives are potent, selective adenosine A2A receptor antagonists, which represent (potential) therapeutics for Parkinson’s disease, Alzheimer’s dementia, and the immunotherapy of cancer. 6-Amino-5-amidouracil derivatives are important precursors for the synthesis of such xanthines. We noticed an unexpected duplication of NMR signals in many of these uracil derivatives. Here, we present
8-Arylethynylxanthine 衍生物是有效的选择性腺苷 A2A 受体拮抗剂,代表了帕金森病、阿尔茨海默病和癌症免疫疗法的(潜在)疗法。6-Amino-5-amidouracil 衍生物是合成此类黄嘌呤的重要前体。我们注意到在许多尿嘧啶衍生物中出现了意外的 NMR 信号重复。在这里,我们利用动态和二维 NMR 光谱、密度泛函理论计算和 X 射线分析对结构多样的 6-氨基-5-甲酰胺双嘧啶进行了详细的分析研究,以解释这些有价值的药物中间体的意外特性。