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。
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。
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
The present invention relates to a compound of formula (I) or a pharmaceutically acceptable salt thereof:
The pyrazole derivatives of formula (I) or salts thereof modulate P2X7 receptor function and are capable of antagonizing the effects of ATP at the P2X7 receptor (P2X7 receptor antagonists). The invention also relates to the use of such compounds or salts, or pharmaceutical compositions thereof, in the treatment or prevention of disorders/diseases mediated by the P2X7 receptor, for example pain, inflammation or a neurodegenerative disease.
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.
Dicationic Acridinium/Carbene Hybrids as Strongly Oxidizing Photocatalysts
作者:Samaresh C. Sau、Matthias Schmitz、Chris Burdenski、Marcel Baumert、Patrick W. Antoni、Christoph Kerzig、Max M. Hansmann
DOI:10.1021/jacs.3c12766
日期:2024.2.7
photocatalysts, the hybrid photocatalysts reported here feature a reversible two-electron redox system with regular or inverted redox potentials for the two-electron transfer. The different oxidation states could be isolated and structurally characterized supported by NMR, EPR, and X-ray analysis. Mechanistic experiments employing time-resolved emission and transient absorption spectroscopy unambiguously
描述了基于双阳离子吖啶鎓/卡宾杂化物的有机强氧化光催化剂的新设计概念。提出了此类杂化物的高度模块化合成,并且双阳离子在直接氧化C-N偶联中用作新型、定制的光氧化还原催化剂。在优化的条件下,苯甚至缺电子芳烃可以被氧化并与一系列N杂环偶联,每次催化转换产生一个低能光子,产率很高到极好,而常用的吖啶鎓光催化剂无法完成这一任务。具有挑战性的氧化步骤。与传统的光催化剂相比,本文报道的混合光催化剂具有可逆的双电子氧化还原系统,具有用于双电子转移的规则或反转的氧化还原电位。通过 NMR、EPR 和 X 射线分析,可以分离不同的氧化态并进行结构表征。采用时间分辨发射和瞬态吸收光谱的机械实验明确揭示了我们性能最佳的催化剂(+2.5 V vs SCE)的突出激发态潜力,并为机械关键步骤和中间体提供了证据。