TRENDS IN IMINO(or AZA)-NAZAROV CYCLIZATION IN THE CONSTRUCTIVE SYNTHESIS OF HETEROCYCLES

This work was financially supported by the Grants Council of the President of the Russian Federation (#NSh-1223.2022.1.3) and Russian Scientific Foundation (Grant # 21-13-00304)

Platinum(II) Acetylacetonate Complex Based on 5-(3-Aminophenyl)-2-(2-thienyl)pyridine: Synthesis, Crystal Structure, and Photophysical Properties

Abstract: The Pt(II) acetylacetonate complex [(L)Pt(Acac)] based on aminophenyl-substituted 2-(2-thienyl)pyridine (L) was synthesized, its photophysical properties were studied and compared with these properties for a similar complex containing no amino group in the ligand. The structure of the complex was confirmed by X-ray diffraction (CIF file CCDC no. 2144689), 1H and 13C NMR spectroscopy, ESI mass spectrometry, and elemental analysis. © 2022, Pleiades Publishing, Ltd.Russian Science Foundation, RSF: 18-73-10119-PThis study was supported by the Russian Science Foundation (grant no. 18-73-10119-P)

Improved method for the obtaining DTTA-appended 2,2’-bipyridine ligands for lanthanide cations

The composition of the reaction mixture after DTTA tert-butyl ester alkylation with 6'-halomethyl-5-phenyl-2,2'-bipyridines was studied. In addition to the target product, DTTA-appended 2,2’-bipyridine, the corresponding 6'-hydroxymethyl-substituted 2,2’-bipyridine and (5'-phenyl-[2,2'-bipyridin]-6-yl)methyl formate were isolated as by-products in some cases. Finally, an improved procedure for the DTTA tert-butyl ester alkylation with 6'-halomethyl-5-phenyl-2,2'-bipyridines by using Finkelstein reaction was developed

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

New 2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione-2,2’-bipyridine-based co-polymer, synthesis, photophysical properties and response to metal cations

A new co-polymer based on fragments of 2-(2-pyridyl)monoazatriphenylene and 2,5-bis (2-ethylhexyl)-3,6-di(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione was prepared by using the Sonogashira reaction. The photophysical properties of the polymer were studied. The presence of a strong bathochromic shift of the absorption and emission maxima in comparison with the previously described monomer units is shown. The polymer exhibits an intense “turn-off” response toward Cu2+ cations

Interaction of 3- and 6-unsubstituted 1,2,4-triazines with lithium salt of phenylacetylene

The interactions of 3-unsubstituted- and 6-unsubstituted 1,2,4-triazines with the lithium salt of phenylacetylene is studied. © 2019 Author(s)

Preparation of Ligands for Lanthanide Cations Based on 5-Aryl-2,2'-Bipyridine-6'-Carboxylic Acids with an Extended Conjugation System

This work was supported by the Russian Science Foundation (Ref. № 18-73-10119)

Preparation of ligands for lanthanide cations based on 5-aryl-2,2′-bipyridine-6′-carboxylic acids with an extended conjugation system

5-Aryl-2,2′-bipyridine-6′-carboxylic acids with an extended conjugation system were prepared as ligands for lanthanide cations. © 2019 Author(s)

A convenient synthetic approach to 5-(het)arylhydrazine substituted 1,2,4‑triazines

Received: 09.09.2020. Accepted: 20.12.2020. Published:30.12.2020.A convenient synthesis of 1,2,4‑triazines bearing the moieties of (hetero) arylhydrazines at the position of C5 of the 1,2,4‑triazine core is reported

Interaction of 3- and 6-Unsubstituted 1,2,4-Triazines With Lithium Salt of Phenylacetylene

This work was supported by the Russian Science Foundation (Ref. № 18-13-00365)