[EN] PYRAN DERVATIVES AS CYP11A1 (CYTOCHROME P450 MONOOXYGENASE 11A1) INHIBITORS [FR] DÉRIVÉS DE PYRANE EN TANT QU'INHIBITEURS DE CYP11A1 (CYTOCHROME P450 MONOOXYGÉNASE 11A1)
Design, Synthesis, Biological Evaluation and In Silico Studies of Pyrazole-Based NH2-Acyl Oseltamivir Analogues as Potent Neuraminidase Inhibitors
作者:Jiqing Ye、Lin Lin、Jinyi Xu、Paul Kay-sheung Chan、Xiao Yang、Cong Ma
DOI:10.3390/ph14040371
日期:——
Oseltamivir represents one of the most successful neuraminidase (NA) inhibitors in the current anti-influenza therapy. The 150-cavity of NA was identified as an additional binding pocket, and novel NA inhibitors have been designed to occupy the 150-cavity based on the structure information of oseltamivir carboxylate (OC) in complex with NA. In this study, a series of C-5-NH2-acyl derivatives of OC
奥司他韦是当前抗流感治疗中最成功的神经氨酸酶(NA)抑制剂之一。 NA 的 150 个空腔被确定为一个额外的结合袋,并且根据羧酸奥司他韦 ( OC ) 与 NA 复合物的结构信息,设计了新型 NA 抑制剂来占据 150 个空腔。本研究合成了一系列含有吡唑部分的OC的C-5-NH 2 -酰基衍生物。几种衍生物对 NA 表现出显着的抑制活性。此外,计算机ADME评估表明,该衍生物具有类似药物的特性,比OC具有更高的口服吸收率和更大的细胞渗透性。此外,分子对接研究表明,衍生物与 NA 酶活性位点和 150 腔相互作用,正如预期的那样。研究结果为OC的进一步结构优化提供了有用的信息。
Solvent-free and montmorillonite K10-catalyzed domino reactions for the synthesis of pyrazoles with alkynylester as a dual synthon
4-trisubstituted and 1,4-disubstitutedpyrazole derivatives. The reaction proceeded via nucleophilic attack of enamine from an intermediate on the β-carbon of an amino acrylate. Experimental outcomes clearly revealed that organic solvents had an adverse effect upon pyrazole formation, and that an oxidative condition in the presence of the reusable clay favored formation of the 1,3,4-trisubstituted pyrazole. The clay
Unveiling Potent Photooxidation Behavior of Catalytic Photoreductants
作者:Karina Targos、Oliver P. Williams、Zachary K. Wickens
DOI:10.1021/jacs.1c00399
日期:2021.3.24
We describe a photocatalytic system that reveals latent photooxidant behavior from one of the most reducing conventional photoredox catalysts, N-phenylphenothiazine (PTH). This aerobic photochemical reaction engages difficult to oxidize feedstocks, such as benzene, in C(sp2)–N coupling reactions through direct oxidation. Mechanistic studies are consistent with activation of PTH via photooxidation and
Arene C–H Amination with <i>N</i>-Heteroarenes by Catalytic DDQ Photocatalysis
作者:Kaii Nakayama、Yohei Okada
DOI:10.1021/acs.joc.3c00293
日期:2023.5.5
has an oxidation potential of 2.48 V (vs SCE), was functionalized by pyrazoles, triazoles, tetrazoles, purines, and tert-butoxycarbonyl amine. Arenes underwent amination via a combination of ultraviolet (UV) light and a DDQ photocatalyst without a typical co-oxidant. Although the mechanism remains an open question, DDQH2, which is generated from DDQ after oxidation, is reactivated to DDQ under UV light
Organic photoredox-catalyzed oxidative azolation of unactivated fluoroarenes
作者:Guodong Ju、Yalong Li、Yingsheng Zhao
DOI:10.1039/d3ob01041d
日期:——
6-triphenylpyrrolium tetrafluoroborate (TPT) is used as an organic photocatalyst for the nucleophilicaromaticsubstitution of unactivated fluoroarenes with pyrazole derivatives (SNAr) to form azole arenes. The use of organic photoredox catalysis enables the easy operation of this method under mild conditions. Various fluorinated aromatic compounds are suitable electrophiles for this transformation.