Direct synthesis of 5-arylethynyl-1,2,4-triazines via direct CH-functionalization

An efficient synthetic approach towards 5-arylethynyl-1,2,4-triazines via direct C-H-functionalization of 5-H-1,2,4-triazines in reaction with lithium acetylenes is reported

SYNTHESIS OF NEW 3-(PYRIDIN-2-YL)-1,2,4-TRIAZINE COMPLEXES OF RUTHENIUM (II)

This work was supported by Russian Science Foundation Grant # 23-23-00539

An Effective Synthetic Approach to of 2-([5'-Aryl-2,2'-bipyridin]-6-yl)-5-aryl-1,3,4-oxadiazoles

Abstract: A convenient synthetic approach to 2-(2,2'-bipyridin-6-yl)-1,3,4-oxadiazole derivatives is proposed, which involves the preparation of 5-aryl-2,2'-bipyridine-6-carboxylic acid esters by the “1,2,4-triazine” methodology and the subsequent construction of the 1,3,4-oxadiazole ring via the modification of the ester group. © 2023, The Author(s).Russian Science Foundation, RSF: 18-73-10119-PThe work was financially supported by the Russian Science Foundation (project no. 18-73-10119-P)

The synthesis of aminophenyl-substituted 2,2'-bipyridine ligands by "1,2,4-triazine" methodology

A convenient synthetic approach to the 2,2'-bipyridines, including those with a condensed cyclopentene fragment, having an aminophenyl substituent at the C5 or C6 positions is reported. The products were obtained via their 1,2,4-triazine analogs with a nitro group, by the subsequent transformation of their 1,2,4-triazine ring into a pyridine one and the reduction of the nitro group to the amino group. © 2021 Author(s).Russian Science Foundation, RSF, (20-13-00142)Council on grants of the President of the Russian Federation, (NSh-2700.2020.3)This work was supported by the Russian Science Foundation (Grant # 20-13-00142) and by the Grants Council of the President of Russian Federation (Grant # NSh-2700.2020.3)

SYNTHESIS AND PHOTOPHYSICAL PROPERTIES OF MONOAZATRIPHENYLENE DERIVATIVES AND ANALOGUES WITH EXTENDED CONJUGATION SYSTEM

This work was supported by Russian Science Foundation grants # 19-73-10144-Р and # 23-13-00318

New naphtho[1,8-ef]perimidines: synthesis, fluorescence studies and application for detection of nitroanalytes

Received: 15.12.2021. Revised: 20.12.2021. Accepted: 20.12.2021. Available online: 24.12.2021.A rational approach to the synthesis of substituted naphtho[1,8-ef]perimidines based on SN H methodology and cyclization reaction in the series of condensed azines with naphthalene substituents was presented. Photophysical properties of the obtained fluorophores were studied, in particular, green fluorescence in the 485–536 nm range with quantum yield up to 32.4% was detected. HOMO-LUMO energy values and distributions for the new compounds were calculated by the DFT method in comparison with nitroanalytes and perylene. Based on the data obtained, as well as on the results of fluorescence titration, the possibility of using the new diazaperylenes as potential chemosensors for the visual detection of nitrocontaining explosives was shown.This work was supported by Grants Council of the Presi-dent of the Russian Federation № NSh-2700.2020.3

Synthesis of water-soluble gadolinium(iii) complexes based on 5-aryl-2,2'-bipyridine with a DTTA residue in position C6'

Two new Gd(III) complexes based on 5-aryl-2,2'-bipyridines with the DTTA residue at C6' position were obtained. Primary photophysical properties of new chelates have been studied. The resulting complexes are of interest by potential using, e.g., as contrast reagents for magnetic resonance imaging (MRI). © 2021 Author(s).Ministry of Education and Science of the Russian Federation, Minobrnauka, (075-15-2020-777)This work was supported by the Ministry of Science and Higher Education of the Russian Federation, Grant # 075-15-2020-77

Asymmetrically Functionalized 1,3-Di(2-pyridyl)benzenes: Synthesis and Photophysical Studies

A convenient synthetic approach to asymmetrically functionalized 1,3-di(2-pyridyl)benzenes starting from 3-(3-bromophenyl)-1,2,4-triazines using sequential aza-Diels–Alder reactions and Stille cross-coupling is reported. Photophysical properties of the obtained compounds are studied. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.This work was supported by Russian Science Foundation (Grant № 19-73-10144) and Grants Council of the President of the Russian Federation (no. NSh-2700.2020.3). No other sources of funding were involved

The synthesis of 6-phenoxyphenylamino-2,2'-bipyridines as new fluorophores

New alpha-arylamino-substituted 2,2'-bipyridine type ligands are prepared. © 2019 Author(s)

Synthesis of 2-Phenyl-2-(5-Phenyl-2,2'-Bipyridin-6-yl)-Acetonitrile by «1,2,4-Triazine» Method with Using Autoclave

This work was supported by the Russian Science Foundation (Ref. № 18-73-00301)