Synthesis and SAR Study of Simple Aryl Oximes and Nitrofuranyl Derivatives with Potent Activity Against Mycobacterium tuberculosis
作者:Cristiane França da Costa、Marcus Vinicius Nora de Souza、Maria Cristina da Silva Lourenço、Elaine Soares Coimbra、Guilherme da Silva Lourenço Carvalho、James Wardell、Stephane Lima Calixto、Juliana da Trindade Granato
DOI:10.2174/1570180816666181227115738
日期:2019.12.31
Background: Oximes and nitrofuranyl derivatives are particularly important compounds in medicinal chemistry. Thus, many researchers have been reported to possess antibacterial, antiparasitic, insecticidal and fungicidal activities. Methods: In this work, we report the synthesis and the biological activity against Mycobacterium tuberculosis H37RV of a series of fifty aryl oximes, ArCH=N-OH, I, and eight
Potassium Poly(Heptazine Imide): Transition Metal‐Free Solid‐State Triplet Sensitizer in Cascade Energy Transfer and [3+2]‐cycloadditions
作者:Aleksandr Savateev、Nadezda V. Tarakina、Volker Strauss、Tanveer Hussain、Katharina Brummelhuis、José Manuel Sánchez Vadillo、Yevheniia Markushyna、Stefano Mazzanti、Alexander P. Tyutyunnik、Ralf Walczak、Martin Oschatz、Dirk M. Guldi、Amir Karton、Markus Antonietti
DOI:10.1002/anie.202004747
日期:2020.8.24
Polymeric carbon nitride materials have been used in numerous light‐to‐energy conversion applications ranging from photocatalysis to optoelectronics. For a new application and modelling, we first refined the crystalstructure of potassium poly(heptazine imide) (K‐PHI)—a benchmark carbon nitride material in photocatalysis—by means of X‐ray powder diffraction and transmission electron microscopy. Using
Cyclic Hydroxamic Acid Analogues of Bacterial Siderophores as Iron-Complexing Agents prepared through the Castagnoli-Cushman Reaction of Unprotected Oximes
The first application of multicomponent chemistry (the Castagnoli–Cushman reaction) toward the convenient one‐step preparation of cyclichydroxamicacids is described. Cyclichydroxamicacids are close analogues of bacterial siderophores (iron‐binding compounds) and form stable complexes with Fe3+ ions as confirmed by spectrophotometric measurements. These compounds are potential components for the
Castagnoli–Cushman reaction of oximes, discovered originally for homophthalic anhydride, stimulated the search for other cyclic anhydrides that would be workable in that reaction. Finally, 3-arylglutaconic acid anhydrides were identified as displaying the right reactivity towards a wide range of oximes (including those which did not react with homophthalic anhydride, such as derivatives of aliphatic aldehydes
肟的 Castagnoli-Cushman 反应最初是为同邻苯二甲酸酐而发现的,它刺激了寻找在该反应中可行的其他环状酸酐的工作。最后,3-芳基戊烯二酸酐被确定为对多种肟显示出正确的反应性(包括那些不与高邻苯二甲酸酐反应的肟,例如脂肪醛或酮的衍生物以及具有亲核侧基的底物)并在递送后110 °C 在 DMSO 中 18 小时,β,γ-不饱和N由于伴随环缩合过程的脱羧作用而缺乏羧酸官能团的-羟基内酰胺产物。发现该反应可扩展到克量的起始酸酐。结果表明,这些产品很容易进行后缩合双键转位或还原。正如环状异羟肟酸所预期的那样,反应产物显示可结合 Fe( III ) 和 Cu( II ) 离子(选择性地从一组 16 种金属阳离子中分离出来)并可能用作荧光金属传感器。