Initially, using the cyclization methods known to us, quinazolin-4-one derivatives containing bromine in the 6 position were synthesized and converted into 6-bromo-quinazolin 4-thiones using Lawesson's reagent. The thione derivatives were reacted with aromatic boronic acids in the presence of appropriate bases, palladium catalysts, and solvents, their chemical properties were studied and optimal conditions were selected. The structures of the resulting new compounds were analyzed based on 1H NMR, 13C NMR, MS, and MP analyses.
| Mualliflar | D. Turgunov, Azizbek Nasrullaev, Khurshed Bozorov, N. Lifei, Haji Akber Aisa |
|---|---|
| Jurnal | Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi |
| Nashr sanasi | 2025-03-29 |
| Jild | 1 |
| Son | 1 |
| Betlar | 18-22 |
| Til | en |
| DOI | 10.59251/2181-1296.2025.v1.149.2.3209 |
DOI: 10.59251/2181-1296.2025.v1.149.2.3209 · Maqolaning asl sahifasi
Wеаkly intеrаcting cоmplеxеs оf CD₃Hаl···HCl (Hаl = F, Cl, Br) hаvе bееn invеstigаtеd in а liquid аrgоn еnvirоnmеnt using infrаrеd (IR) spеctrоscоpy аnd dеnsity functiоnаl thеоry (DFT) cаlculаtiоns. Thе structurаl аnd…
This paper presents the results of obtaining a thin-film hybrid structure on the surface of a single-crystal silicon wafer with a fairly thin layer of silicon dioxide (SiO2) (~2÷4 nm), in which a thin perovskite layer…
In this scientific paper, the landscape-meliorative approach and the evaluation of landscapes based on various principles are examined in the context of studying landscape complexes, with the Middle Zarafshan as a study.
In the present research note, we have derived the explicit expression for the perihelion precession and the deflection angle of light by the gravitational object. The explicit expression for the trajectory of the planet…
This paper is devoted to study the mixed problem for a nonhomogeneous pseudoparabolic equation. The Hilfer fractional equation is studied with initial value conditions recording first variable t and Samarskii-Ionkin…
A novel series of 6-bromo-benzo[2,1 b]pyrimidin-4-thiones were synthesized. Thiones of the tricyclic pyrimidinones are obtained via a conversion procedure, where the C=O functional group is successfully converted into…
This article analyzes the experience of developed and developing foreign countries in the territorial organization of urbanization processes. In particular, examples from countries such as the United States, Sweden…
The effect of a mixed solvent of water - isopropanol was studied on the relative volume of polyvinyl alcohol gel in solutions of various electrolytes of different concentrations. Kinetic curves of the change in the…
The paper analyzes some parametrized singular surfaces in three dimensional Euclidean spaces. It is investigated a transversality condition for these surfaces.
In this work, the synthesis of iron ( Fe(II)), cobalt (Co(II)) and zinc (Zn(II)) ion complexes with flavonoids quercetin and rutin was studied and their stability constants at different pH values were estimated. The…
Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi — barcha maqolalar