Functional Derivatives of 4-Formyl-2-methoxyphenyl Pyridine-4-carboxylate
作者:V. I. Potkin、N. A. Bumagin、E. A. Dikusar、S. K. Petkevich、P. V. Kurman
DOI:10.1134/s1070428019100063
日期:2019.10
pyridine-4-carboxylate which was converted into a number of functional derivatives, including those containing isoxazole and isothiazole heterocycles. In particular, the condensation of the title compound with primary amines afforded the corresponding Schiffbases. 4-Formyl-2-methoxyphenyl pyridine-4-carboxylate and one of the Schiffbases derived therefrom were reduced with sodium triacetoxohydridoborate
3,5-[5-Arylisoxazol-3-yl(4,5-dichloroisothiazol-3-yl)]-substituted 1,2,4- and 1,3,4-oxadiazoles: synthesis, palladium complexes, and catalysis of Suzuki reactions in aqueous media
作者:Nikolay A. Bumagin、Sergey K. Petkevich、Alexey V. Kletskov、Vladimir I. Potkin
DOI:10.1007/s10593-018-2216-z
日期:2017.12
involving transformations of 5-(4-methylphenyl)isoxazole and 4,5-dichloroisothiazole derivatives containing an amidoxime group at position 3 allowed to synthesize the respective 3,5-isoxazolyl(isothiazolyl)-substituted 1,2,4-oxadiazoles. Selective recyclization of 4,5-dichloro-3-(1Н-tetrazol-5-yl)isothiazole and 5-(4-methylphenyl)-3-(1Н-tetrazol-5-yl)isoxazole gave 2,5-isoxazolyl-(isothiazolyl)-substituted
涉及转化5-(4-甲基苯基)异恶唑和4位在位置3处含有a肟基的4,5-二氯异噻唑衍生物的反应序列,可以合成各自的3,5-异恶唑基(异噻唑基)取代的1,2,4-恶二唑。4,5-二氯-3-(1-选择性再成环Н -四唑-5-基)异噻唑和5-(4-甲基苯基)-3-(1- Н -四唑-5-基)异恶唑,得到2,5-异恶唑基-(异噻唑基)取代的1,3,4-恶二唑。所获得的化合物在一个分子中结合了三个唑杂环,形成了钯配合物,该钯配合物在水性和水性醇介质中的Suzuki反应中显示出高催化活性。由钯聚唑配合物获得的双金属可重复使用的Pd / Fe催化剂经过五次使用后仍保持了较高的催化活性。
Synthesis of functionally substituted isoxazole and isothiazole derivatives
作者:V. I. Potkin、S. K. Petkevich、A. V. Kletskov、E. A. Dikusar、Yu. S. Zubenko、N. A. Zhukovskaya、V. V. Kazbanov、S. G. Pashkevich
DOI:10.1134/s1070428013100205
日期:2013.10
Acylation of benzene and toluene with 5-phenyl- and 5-(p-tolyl)isoxazole-3-carbonyl chlorides gave 5-phenyl(or p-tolyl)isoxazol-3-yl phenyl(or p-tolyl)ketones which were reduced to the corresponding alcohols with sodium tetrahydridoborate in propan-2-ol. Selective reduction of the carboxy group in 4,5-dichloroisothiazole-3-carboxylic acid was achieved by the action of BH3, and the aldehyde group in
Abstract By a series of successive transformations, 5-arylisoxazole-3-carboxylic acids (aryl = phenyl, p-tolyl, 2,5-dimethylphenyl) have been converted into 5-arylisoxazole-3-hydroxamic acids, which undergo rearrangement by the action of aqueous KOH to form 3,4-substituted 1,2,5-oxadiazoles. The structure of one of them, 1-(2,5-dimethylphenyl)-2-(4-hydroxy-1,2,5-oxadiazol-3-yl)ethanone, has been confirmed
Synthesis of 5-azolyl-2,4-dihydro-3H-1,2,4-triazole-3-thiones and 5-azolyl-1,3,4-thiadiazol-2-amines based on derivatives of 5-arylisoxazole-3-carboxylic and 4,5-dichloroisothiazole-3-carboxylic acids
作者:Sergey K. Petkevich、Neliya А. Zhukovskaya、Evgenij А. Dikusar、Ekaterina А. Akishina、Peter V. Kurman、Eugeniya V. Nikitina、Vladimir P. Zaytsev、Vladimir I. Potkin
DOI:10.1007/s10593-021-02948-w
日期:2021.5
5-arylisoxazole- and 4,5-dichloroisothiazole-3-carboxylic acids and their derivatives. The amino group of 5-(4,5-dichloroisothiazol-3-yl)-1,3,4-thiadiazol-2-amine was acylated with 5-phenylisoxazole-3-carboxylic acid chloride. Simple approaches to the preparation of previously unknown heterocyclic assemblies containing two or three azole rings with a high potential for biological activity are described.