A convenient palladium catalyzed synthesis of symmetric biaryls, biheterocycles and biaryl chiral diamides
作者:Shyamaprosad Goswami、Avijit Kumar Adak、Reshmi Mukherjee、Subrata Jana、Swapan Dey、John F. Gallagher
DOI:10.1016/j.tet.2005.02.019
日期:2005.4
A series of symmetrical diamido biaryls has been synthesized in good yield by direct homocoupling of iodoarylbenzamides by palladium-catalysis. No cross product has been isolated from the reaction mixture of two different iodoarylbenzamides under similar conditions. However, only in the case of 2-iodo-N-phenylbenzamide, the intramolecularly coupled product phenanthridone has been isolated as a minor
Discovery and Mechanism of SARS-CoV-2 Main Protease Inhibitors
作者:Sarah Huff、Indrasena Reddy Kummetha、Shashi Kant Tiwari、Matthew B. Huante、Alex E. Clark、Shaobo Wang、William Bray、Davey Smith、Aaron F. Carlin、Mark Endsley、Tariq M. Rana
DOI:10.1021/acs.jmedchem.1c00566
日期:2022.2.24
coronavirus 2 (SARS-CoV-2), presents an urgent public health crisis. Without available targeted therapies, treatment options remain limited for COVID-19 patients. Using medicinal chemistry and rational drug design strategies, we identify a 2-phenyl-1,2-benzoselenazol-3-one class of compounds targeting the SARS-CoV-2mainprotease (Mpro). FRET-based screening against recombinant SARS-CoV-2 Mpro identified
一种新的冠状病毒——严重急性呼吸综合征冠状病毒2(SARS-CoV-2)的出现,提出了紧迫的公共卫生危机。如果没有可用的靶向治疗,COVID-19 患者的治疗选择仍然有限。使用药物化学和合理的药物设计策略,我们确定了针对 SARS-CoV-2 主要蛋白酶 (M pro )的 2-phenyl-1,2-benzoselenazol-3-one 类化合物。基于 FRET 的重组 SARS-CoV-2 M pro筛选确定了六种抑制蛋白水解的化合物,IC 50值为纳摩尔。预孵育稀释实验和分子对接确定了对 SARS-CoV-2 M pro的抑制作用可以通过共价或非共价机制发生,并确定铅 E04竞争性抑制 M pro 。铅 E24 以纳摩尔 EC 50值 (844 nM) 抑制 SARS-CoV-2 感染的 Vero E6 细胞中的病毒复制,并进一步证实会损害 SARS-CoV-2 在人肺上皮细胞和人诱导的多能干细胞中的复制-衍生的
Direct Arylation under Catalysis of an Oxime-Derived Palladacycle: Search for a Phosphane-Free Method
for the direct arylation of benzothiazole by employing oxime-derived palladacycle 1 as a catalyst was developed. The new catalyst system can be used for 2-arylations by using aryl bromides and iodides. In addition, this method is especially suitable for the intramolecular direct coupling of bromo- and iodoamides, as well aschloroamides, to achieve a rapid synthesis of benzo[c]phenanthridine alkaloids
Synthesis of 2,3-Disubstituted Quinazolinone Derivatives through Copper Catalyzed C-H Amidation Reactions
作者:Trimurtulu Kotipalli、Veerababurao Kavala、Donala Janreddy、Vijayalakshmi Bandi、Chun-Wei Kuo、Ching-Fa Yao
DOI:10.1002/ejoc.201501552
日期:2016.2
The synthesis of quinazolinone derivatives was achieved from 2-iodobenzamide derivatives and various benzylamines, allylamine, and cinnamylamine derivatives through a one-pot copper-catalyzed reaction. In this reaction, the amine component (benzylamine/allylamine/cinnamylamine) is N-arylated with 2-iodobenzamide derivatives through Ullman coupling, followed by an intramolecular C–H amidation in the
An efficient synthesis of substituted quinazolin-4(3H)-ones by a one-pot ligand-free CuI-catalyzed coupling/condensative cyclization under mild conditions is described. Our study provides an alternative strategy for the preparation of biologically active quinazolin-4(3H)-ones.