摘要 已经合成了糖精和乙酰磺胺酸衍生物的大型文库,并针对人碳酸酐酶的四种同工型,两种脱靶的hCA I / II和与肿瘤相关的同工型hCA IX / XII进行了评估。糖精和乙酰磺胺酸核心都尝试了不同的支架修饰策略,从而获得了60种化合物。它们中的一些表现出在纳摩尔范围内的抑制活性,尽管某些进行的改变导致针对hCA IX / XII的微摩尔活性或不存在。分子模型研究将注意力集中在这些化合物与酶的结合方式上。拟议的抑制机制是锚定在锌结合的水分子上。对接研究以及分子动力学也强调了化合物灵活性的重要性(例如,
In situ Generation and Utilization of CO: An Efficient Route
towards N-Substituted Saccharin via Carbonylative Cyclization of 2-Iodosulfonamides
作者:Bhalchandra Bhanage、Sujit Chavan、Adithyaraj K.
DOI:10.1055/s-0036-1588422
日期:2017.9
The present protocol demonstrates the synthesis of N-substituted saccharines via carbonylative cyclization of 2-iodosulfonamides using a Pd(OAc) 2 /Xantphos catalyst system and phenylformate as a CO source. A variety of saccharin derivatives is synthesized under milder reaction conditions.
本协议演示了使用 Pd(OAc) 2 /Xantphos 催化剂系统和苯甲酸作为 CO 源通过 2-碘磺酰胺的羰基化环化合成 N 取代的糖精。多种糖精衍生物是在较温和的反应条件下合成的。
Copper-Mediated Functionalization of Aryl Trifluoroborates
作者:Melanie Sanford、Sydonie Schimler
DOI:10.1055/s-0035-1562529
日期:——
trifluoroborates with tetrabutylammonium or alkali metal salts to form C–O, C–N, and C–halogen bonds. The reactions proceed under mild conditions (often room temperature over 16 hours) with carboxylate, halide, and azide salts, all nucleophiles that have been underrepresented in the copper cross-coupling literature. Preliminary results show that coppersalts bearing weakly coordinating X-type ligands
本文描述了 Cu(OTf)2 介导的芳基和杂芳基三氟硼酸盐与四丁基铵或碱金属盐的偶联,形成 C-O、C-N 和 C-卤素键。反应在温和条件下进行(通常在室温下超过 16 小时),使用羧酸盐、卤化物和叠氮化物,所有亲核试剂在铜交叉偶联文献中都没有得到充分体现。初步结果表明,带有弱配位 X 型配体的铜盐对于使这些转化在温和条件下进行是必不可少的。
Visible-Light Promoted Catalyst-Free Imidation of Arenes and Heteroarenes
作者:Lu Song、Long Zhang、Sanzhong Luo、Jin-Pei Cheng
DOI:10.1002/chem.201404479
日期:2014.10.27
herein a catalyst‐free visible‐light photolytic protocol for the imidation of arenes and heteroarenes. N‐Bromosaccharin was identified as a viable and chemoselective nitrogen radical precursor that undergoes controllable homolytic cleavage under ambient light irradiation. The reaction can be applied to a number of arenes and heteroarenes with good chemo‐ and regioselectivity. Mechanistic studies revealed
Ligand-free access to benzisothiazolones and benzisoselenazolones through NiFe<sub>2</sub>O<sub>4</sub> catalyzed concomitant annulation of 2-halobenzanilides with chalcogens and their late-stage transformations
作者:Samiran Dhara、Moumita Saha、Asish R. Das
DOI:10.1039/d2nj04326b
日期:——
temperature and useful application of synthesized molecules. The rarely explored chemistry of NiFe2O4 towards the X–N cross-coupling reaction well complements conventional methods for the synthesis of S–N or Se–N heterocycles. Nickel ferrite nanoparticles were prepared by a simple hydrothermal method and characterized by using XRD, SEM, TEM, HRTEM, SAED, energy dispersive X-ray spectroscopy, XPS, ICP-AES and
Decarboxylative sulfoximination of benzoic acids enabled by photoinduced ligand-to-copper charge transfer
作者:Peng Xu、Wanqi Su、Tobias Ritter
DOI:10.1039/d2sc05442f
日期:——
solution to decarboxylative sulfoximination of benzoic acids; although thoroughly investigated, limited substrate scope and harsh reaction conditions still hold back traditional thermal aromatic decarboxylative functionalization. Herein, we realize the first decarboxylative sulfoximination of benzoic acids via photo-induced ligand to copper charge transfer (copper-LMCT)-enabled decarboxylative carbometalation