Fragment-Based Discovery of a Qualified Hit Targeting the Latency-Associated Nuclear Antigen of the Oncogenic Kaposi’s Sarcoma-Associated Herpesvirus/Human Herpesvirus 8
摘要:
The latency-associated nuclear antigen (LANA) is required for latent replication and persistence of Kaposi's sarcoma-associated herpesvirus/human herpesvirus 8. It acts via replicating and tethering the virus episome to the host chromatin and exerts other functions. We conceived a new approach for the discovery of antiviral drugs to inhibit the interaction between LANA and the viral genome. We applied a biophysical screening cascade and identified the first LANA binders from small, structurally diverse compound libraries. Starting from a fragment-sized scaffold, we generated optimized hits via fragment growing using a dedicated fluorescence-polarization-based assay as the structure activity-relationship driver. We improved compound potency to the double-digit micromolar range. Importantly, we qualified the resulting hit through orthogonal methods employing EMSA, STD-NMR, and MST methodologies. This optimized hit provides an ideal starting point for subsequent hit-to-lead campaigns providing evident target-binding, suitable ligand efficiencies, and favorable physicochemical properties.
N-Arylations of Nitrogen-Containing Heterocycles with Aryl and Heteroaryl Halides Using a Copper(I) Oxide Nanoparticle/1,10-Phenanthroline Catalytic System
and indoles, with aryl and heteroarylhalides catalyzed by copper(I) oxide (Cu 2 O) nanoparticles is demonstrated. Four types of Cu 2 O were evaluated: the bulky compound and its cubic, octahedral, and spherical nanoparticulate forms. The results show that Cu 2 O nanoparticles, in particular the cubic form, are highly efficient for the N-arylation reaction. In the presence of cubic Cu 2 O nanoparticles
演示了含氮杂环(即咪唑、三唑和吲哚)的无溶剂 N-芳基化的一般程序,其中芳基和杂芳基卤化物由氧化铜 (I) (Cu 2 O) 纳米颗粒催化。评估了四种类型的 Cu 2 O:大体积化合物及其立方、八面体和球形纳米颗粒形式。结果表明,Cu 2 O 纳米颗粒,特别是立方形式,对 N-芳基化反应非常有效。在立方 Cu 2 O 纳米粒子、1,10-菲咯啉和四丁基氟化铵存在下,多种含氮杂环在 110-145 °C 下与芳基和杂芳基卤化物顺利进行 N-芳基化反应,得到相应的产物以优异的产量。值得注意的是,该反应是在无溶剂条件下进行的。
Lampe, John W.; Meo, Susan V. Di; Traina, Joseph A., Journal of Heterocyclic Chemistry, 1994, vol. 31, # 2, p. 287 - 292
作者:Lampe, John W.、Meo, Susan V. Di、Traina, Joseph A.