Carbene‐Catalyzed Enantioselective Aromatic N‐Nucleophilic Addition of Heteroarenes to Ketones
作者:Yonggui Liu、Guoyong Luo、Xing Yang、Shichun Jiang、Wei Xue、Yonggui Robin Chi、Zhichao Jin
DOI:10.1002/anie.201912160
日期:2020.1.2
and optical purities. Our reaction involves the formation of an unprecedented aza-fulvene-type acylazolium intermediate. A broad range of N-heteroaromatic aldehydes and electron-deficient ketone substrates works effectively in this transformation. Several of the chiral N,O-acetal products afforded through this protocol exhibit excellent antibacterial activities against Ralstonia solanacearum (Rs) and
作者:Ekaterina V. Zaryanova、Nataly A. Lozinskaya、Olga V. Beznos、Maria S. Volkova、Nataly B. Chesnokova、Nikolay S. Zefirov
DOI:10.1016/j.bmcl.2017.06.065
日期:2017.8
the prolonged effect (more than 6 h) of the lead-compound. This effect in combination with high IOP reducing effect (41 ± 6%) in low concentrations of the active compound (0.1 wt%) and with high water solubility represents a great potential of low-cost oxindole derivatives as potent antiglaucoma agents.
Structural Studies with Antimicrobial and Antifertility Activity of a Monofunctional Bidentate Ligand with its Boron(III), Palladium(II), and Platinum(II) Complexes
作者:R. V. Singh、M. K. Biyala
DOI:10.1080/10426500500330869
日期:2006.7.1
7-nitro-3-(indolin-2-one) hydrazinecarbo-thioamide, with phenyldihydroxyboron in benzene, palladium(II)chloride, and platinum(II) chloride, in ethanol, gave the mononuclear tetracoordinated and hexacoordinated complexes. The Schiff base ligand coordinated to the boron atom in 1:1 and 1:2 molar ratios and to the palladium and platinum metals in only 1:2 molar ratios in the presence of an acidic and basic medium. Tentative
硫供体席夫碱配体 7-硝基-3-(indolin-2-one) 肼碳硫酰胺与苯基二羟基硼在苯、氯化钯 (II) 和氯化铂 (II) 中的乙醇中反应,得到单核四配位和六配位配合物。在酸性和碱性介质的存在下,席夫碱配体以 1:1 和 1:2 的摩尔比与硼原子配位,与钯和铂金属以仅 1:2 的摩尔比配位。基于元素分析、电导率和光谱(电子、红外、 1 H NMR、 13 C NMR 和 11 B NMR)数据得出反应产物的初步结构结论。以有效的方式通过比较研究讨论了配体及其非金属/金属配合物的抗生育活性。
Discovery of an eIF4A Inhibitor with a Novel Mechanism of Action
作者:Christopher J. Zerio、Tyler A. Cunningham、Allison S. Tulino、Erin A. Alimusa、Thomas M. Buckley、Kohlson T. Moore、Matthew Dodson、Nathan C. Wilson、Andrew J. Ambrose、Taoda Shi、Jared Sivinski、Derek J. Essegian、Donna D. Zhang、Stephan C. Schürer、Jonathan H. Schatz、Eli Chapman
DOI:10.1021/acs.jmedchem.1c01014
日期:2021.11.11
Increased protein synthesis is a requirement for malignant growth, and as a result, translation has become a pharmaceutical target for cancer. The initiation of cap-dependent translation is enzymatically driven by the eukaryotic initiation factor (eIF)4A, an ATP-powered DEAD-box RNA-helicase that unwinds the messenger RNA secondary structure upstream of the start codon, enabling translation of downstream
增加蛋白质合成是恶性生长的必要条件,因此,翻译已成为癌症的药物靶标。帽依赖性翻译的起始由真核起始因子 (eIF)4A 酶促驱动,这是一种 ATP 驱动的死盒 RNA 解旋酶,可解开起始密码子上游的信使 RNA 二级结构,从而能够翻译下游基因。筛选 eIF4A ATP 酶活性抑制剂产生了一个有趣的结果,令人惊讶的是,它不是 ATP 竞争性的。药物化学活动产生了新型 eIF4A 抑制剂 28,它降低了 BJAB Burkitt 淋巴瘤细胞活力。生化和细胞研究、分子对接和功能测定发现,28 是一种 RNA 竞争性、ATP 非竞争性抑制剂,它参与 eIF4A RNA 凹槽中的一个新口袋,并通过干扰适当的 RNA 结合和抑制 ATP 水解来抑制解旋活性。通过这种独特的机制抑制 eIF4A 可能为靶向许多致癌途径的这个有希望的交点提供新的策略。