Fe3O4@SiO2@(CH2)3-urea-thiourea: A novel hydrogen-bonding and reusable catalyst for the construction of bipyridine-5-carbonitriles via a cooperative vinylogous anomeric based oxidation
作者:Fatemeh Karimi、Meysam Yarie、Mohammad Ali Zolfigol
DOI:10.1016/j.mcat.2020.111201
日期:2020.12
elemental mapping analysis. The catalytic performance of the novel hydrogen-bonding catalyst was appropriately probed through the multicomponent preparation of bipyridine-5-carbonitriles via a cooperative vinylogous anomeric based oxidation (CVABO) mechanism in the absence of any solvent. The novel hydrogen-bonding nanomagneticcatalyst can readily be regained and reused four times without appreciable
Synthesis and Photophysical Properties of 3-Amino-4-arylpyridin-2(1Н)-ones
作者:Anton L. Shatsauskas、Anton A. Abramov、Sergey A. Chernenko、Anastasia S. Kostyuchenko、Alexander S. Fisyuk
DOI:10.1055/s-0039-1690231
日期:2020.1
method has been developed for the preparation of oxazolo-[5,4-b]pyridin-2(1H)-ones based on the Hoffmann reaction of 2-oxo-1,2-dihydropyridine-3-carboxamides. Hydrolysis of oxazolo[5,4-b]pyridin-2(1H)-ones and the Hoffmann reaction of 2-oxo-1,2-dihydropyridine-3-carboxamides yielded 3-aminopyridin-2(1H)-ones, including 4-aryl substituted derivatives in the series, for which effective phosphors with a
基于2-氧-1,2-二氢吡啶-3-羧酰胺的霍夫曼反应,已经开发了一种制备恶唑-[5,4 - b ]吡啶-2-2 (1 H)-的方法。恶唑并[5,4 - b ]吡啶-2(1 H)-one的水解和2-氧-1,2-二氢吡啶-3-羧酰胺的霍夫曼反应产生3-氨基吡啶-2(1 H)-one,包括该系列中的4-芳基取代衍生物,其有效荧光粉的量子产率高达0.78。通过紫外和发光光谱法研究了3-氨基吡啶-2(1 H)-1的光物理性质,揭示了其结构与光物理性质之间的关系。
Synthesis and Chemosensory Properties of New Cyanosubstituted 2,2'-Bipyridine Derivatives
作者:Mikhail Yu. Ievlev、Nikita S. Mayorov、Ivan N. Bardasov、Saveliy P. Sorokin、Mikhail Yu. Belikov、Oleg V. Ershov
DOI:10.1007/s10895-022-03027-9
日期:2022.11
A series of novel 6-oxo-1,6-dihydro-[2,2'-bipyridine]-5-carbonitriles has been synthesized and characterized. Their photophysical properties in DMSO solution and aqueous medium as well as fluorescence response to the presence of metal ions have been investigated. The obtained 4-(4-methoxyphenyl)-6-oxo-1,6-dihydro-[2,2'-bipyridine]-5-carbonitrile has been shown as a selective fluorescent “turn-ON” probe
合成并表征了一系列新型6-氧代-1,6-二氢-[2,2'-联吡啶]-5-腈。研究了它们在 DMSO 溶液和水性介质中的光物理性质以及对金属离子存在的荧光响应。获得的 4-(4-甲氧基苯基)-6-氧代-1,6-二氢-[2,2'-联吡啶]-5-甲腈已显示为 Cd 2+离子的选择性荧光“开启”探针LoD 0.359 µM,1:1 金属配体比和 5.2 × 10 4 M -1的结合常数。