Synthesis of 2-(pyrrolidin-1-yl)pyrimidines by reactions of N-(4,4-diethoxybutyl)pyrimidin-2-amine with (hetero)aromatic C-nucleophiles
作者:Andrey V. Smolobochkin、Tanzilya S. Rizbayeva、Almir S. Gazizov、Julia K. Voronina、Elena A. Chugunova、Nurgali I. Akylbekov、Nurbol O. Appazov、Alexander R. Burilov、Michael A. Pudovik
DOI:10.1007/s10593-019-02489-3
日期:2019.6
A method was developed for the synthesis of 2-(pyrrolidin-1-yl)pyrimidines and 2-[(4,4-diarylbutyl)amino]pyrimidines by reactions of (hetero)aromatic C-nucleophiles with N-(4,4-diethoxybutyl)pyrimidin-2-amine in the presence of trifluoroacetic acid. The structures of the obtained products were confirmed by methods of IR spectroscopy, 1H and 13C NMR spectroscopy, and X-ray structural analysis.
开发了一种通过(杂)芳族C-亲核试剂与N-(4,4- )反应合成2-(吡咯烷-1-基)嘧啶和2-[((4,4-二芳基丁基)氨基]嘧啶的方法在三氟乙酸存在下的乙二氧基丁基)嘧啶-2-胺。通过IR光谱,1 H和13 C NMR光谱以及X射线结构分析的方法确认了所得产物的结构。
Synthesis and antimicrobial activity of novel structural hybrids of benzofuroxan and benzothiazole derivatives
containing both benzofuroxan and benzothiazole scaffolds were synthesized through electrophile/nucleophile combination of nitrobenzofuroxan derivatives and 2-mercapto- or 2-aminobenzothiazole derivatives and their biological effect on the natural strain Vibrio genus and different bacterial lux-biosensors was studied. Among all the compounds synthesized, that obtained from 2-mercaptobenzothiazole and 7-chloro-4
4-aminobenzofuroxan derivatives containing aromatic/aliphatic amines fragments was achieved via aromatic nucleophilic substitution reaction of 4,6-dichloro-5-nitrobenzofuroxan. The quantum chemistry calculations were performed to identify the factors affecting the regioselectivity of the reaction. The formation of 4-substituted isomer is favored both by its greater stability and the lower activation barrier.
Synthesis and study of antimicrobial activity of quaternary ammonium benzofuroxan salts
作者:Elena A. Chugunova、Nurgali I. Akylbekov、Essam M. Mahrous、Alexandra D. Voloshina、Natalia V. Kulik、Vladimir V. Zobov、Anna G. Strelnik、Tatiana P. Gerasimova、Alexey B. Dobrynin、Alexander R. Burilov
DOI:10.1007/s00706-017-2052-3
日期:2018.1
AbstractIt was found that quaternaryammoniumsalts of benzofuroxan based on o-, m-, and p-dibromoxylenes are formed as a mixture of two tautomers. Only one bromomethyl group participates in the quaternization of benzofuroxan with different dibromoxylenes. Bacteriostatic activity of the most active mixture of tautomers was two and four times higher than the reference drug, chloramphenicol, with respect
The synthesis of novel 2H-benzimidazole 1,3-dioxides on the basis of benzofuroxans interaction with alcohols in acids is described. The formation of a stable secondary carbocation from alcohol is necessary for formation of 2H-benzimidazole 1,3-dioxide while substituents in benzofuroxans don't prevent the reaction. Under heating 2H-benzimidazole 1,3-dioxides are rearranged to 3H-[2,1,4]benzoxadiazine