Chitosan: an efficient promoter for the synthesis of 2-aminopyrimidine-5-carbonitrile derivatives in solvent free conditions
作者:I. R. Siddiqui、Pragati Rai、Rahila、Anushree Srivastava
DOI:10.1039/c4nj00199k
日期:——
Reusable chitosan without any post-modification, with active –NH2 and –OH groups, was found to be a highly efficient and renewable heterogeneous catalyst for the rapid and convenient synthesis of 2-aminopyrimidine-5-carbonitrile derivatives from guanidines, aldehydes and cyanoketones, under mild reaction conditions at 85 °C in good yields. Undoubtedly this methodology gives a facile and straightforward pathway to construct 2-aminopyrimidine-5-carbonitrile derivatives in an eco-friendly fashion.
Three-Component Assembly of Structurally Diverse 2-Aminopyrimidine-5-carbonitriles
作者:Cristina Val、Abel Crespo、Vicente Yaziji、Alberto Coelho、Jhonny Azuaje、Abdelaziz El Maatougui、Carlos Carbajales、Eddy Sotelo
DOI:10.1021/co4000503
日期:2013.7.8
An expedient route for the synthesis of libraries of diversely decorated 2-aminopyrimidine-5-carbonitriles is reported. This approach is based on a three-component reaction followed by spontaneous aromatization.
Optimization of 2-Amino-4,6-diarylpyrimidine-5-carbonitriles as Potent and Selective A<sub>1</sub> Antagonists
potent, structurally simple, and highly selective A1AR ligands. The most attractive ligands were confirmed as antagonists of the canonical cyclic adenosine monophosphate pathway, and some pharmacokinetic parameters were preliminarilly evaluated. The library, built through a reliable and efficient three-component reaction, comprehensively explored the chemical space allowing the identification of the
我们在此记录了大量 108 种 2-氨基-4,6-二取代-嘧啶衍生物,作为有效、结构简单且高度选择性的 A 1 AR 配体。最有吸引力的配体被确认为经典环磷酸腺苷途径的拮抗剂,并初步评估了一些药代动力学参数。该库通过可靠且高效的三组分反应构建,全面探索了化学空间,从而识别了该支架周围结构-活性和结构-选择性关系的最突出特征。其中包括对嘧啶核心 R 4和 R 6位置芳香族残基选择性谱的影响,但最重要的是,在环外氨基处引入的甲基对前所未有的 A 1 AR 选择性谱发挥了突出作用。 A 1和 A 2A AR 的结构-活性关系趋势可以通过严格的自由能扰动模拟方便地解释,该模拟从指导这些系列设计的受体驱动对接模型开始。