Method for Trifuzol-Neo assay determination by GC-MS

Yaroshenko, A.A.; Парченко, В. В.; Bihdan, O. A.; Панасенко, О. І.; Karpenko, Yu. V.; Karpun, Ye. O.

doi:10.52711/0974-360x.2021.00787

Cited by 3 publications

(10 citation statements)

References 12 publications

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“…The next stage of chemical transformation occurred with the participation of synthesized thiol and aromatic carboxylic acids in a phosphorus oxychloride medium, which made it possible to obtain 3- 3,4]thiadiazoles (Fig. 1).…”

Section: Resultsmentioning

confidence: 99%

“…1 H NMR, δ (ppm), J (Hz): 14.76 (s, 1Н, ОН), 7.94-7.88 (m, 2H, H-2,6, 4-OCH 3 -C 6 H 4 ), 7.25-7.31 (m, 2H, H-3,5, 4-OCH 3 -C 6 H 4 ), 6.43 (s, 1Н, =СН), 4.25 (q, J = 6.8 Hz, 2Н, OCH 2 CH 3 ), 3.74 (s, 3Н, 4-OCH 3 -C 6 H 4 ), 1.17 (t, 3H, OCH 2 CH 3 ). Ethyl-5-(4-methoxyphenyl)pyrazole-3-carboxylate (4). A mixture of ethyl-4-hydroxy-4-(4-methoxyphenyl)-2-oxobut-3-ethanoate (0.1 mol) and hydrazine hydrate (0.5 mol) in 40 ml of propane-1-ol was heated to a boil for 8 hours.…”

Section: Resultsmentioning

confidence: 99%

“…The combination of different heterocyclic fragments with pharmacophore properties in one molecule makes it possible to use in practice the basic principles of the hybrid pharmacophore method for constructing molecules that are promising from the point of view of Pharmacology [1][2][3][4][5][6][7][8][9]. This approach allows you to achieve the necessary pharmacological effect, influence the indicators of toxicity and selectivity of action [10][11][12][13][14][15].…”

Section: актуальні питання фармацевтичної і медичної науки та практик...mentioning

confidence: 99%

“…The aim of the work was to synthesize compounds in the series 3-(5-(4-methoxyphenyl)pyrazole-3-yl)-6-R- [1,2,4] triazolo [3,4-b][1,3,4]thiadiazoles.…”

Section: Aimmentioning

confidence: 99%

“…Результати. Здійснили синтез 3-(5-(4-метоксифеніл)піразол-3-іл)-6-R- [1,2,4]тріазоло [3,4-b][1,3,4]тіадіазолів і визначили оптимальні умови процесу одержання цих речовин. Будова продуктів хімічного перетворення підтверджена, результати дослідження фізичних властивостей зафіксовано.…”

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Synthesis and properties of some 3-(5-(4-methoxyphenyl)pyrazol-3-yl)-6-R-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles

Gotsulya

Панасенко

2022

АП

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Pyrazole and 1,2,4-triazole derivatives play an important strategic role in modern medicine and pharmacy. This fact is due to the significant possibilities of chemical modification and significant pharmacological potential among the derivatives of these heterocycles. The introduction of 1,2,4-triazole and pyrazole fragments into the structure of new substances allows to influence the formation of a certain type of activity. The structural combination of these heterocycles in one molecule increases the likelihood of interaction with various biological targets. At the same time, the creation of condensed systems involving 1,2,4-triazole is undoubtedly scientifically attractive and promising. The aim of the research was to study the conditions for obtaining 3-(5-(4-methoxyphenyl)pyrazol-3-yl)-6-R-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles and studying the properties of these compounds. Materials and methods. The first stage of the synthetic part of the work involved the use of diethyl oxalate and 1-(4-methoxyphenyl)ethan-1-one with the participation of sodium hydride in toluene. The obtained ethyl 4-hydroxy-4-(4-methoxyphenyl)-2-oxobut-3-ethanoate in the next step was used in the process of conversion into ethyl 5-(4-methoxyphenyl)pyrazole-3-carboxylate with the participation of hydrazine hydrate. Further modification of the molecule was the stepwise formation of the structure of 4-amino-5-(5-(4-methoxyphenyl)pyrazol-3-yl)-1,2,4-triazole-3-thiol. The next stage of the work involved the interaction with carboxylic acids in the environment of phosphorus oxychloride. To determine the composition and identify the structure of the isolated substances, 1H NMR and infrared spectra were recorded, as well as qualitative and quantitative indicators of the elemental composition of the synthesized structures were obtained. The individual nature of the presence of substances and the degree of their purity were determined using high performance liquid chromatography. Results. Synthesis of 3-(5-(4-methoxyphenyl)pyrazol-3-yl)-6-R-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles was performed and optimal conditions were determined the process of obtaining these substances. The structure of the products of chemical transformation was confirmed and the results of the study of physical properties were recorded. The results of docking studies allowed to confirm the prospects of the chosen direction of synthetic transformations, which ultimately allowed to determine the biological potential of the obtained compounds. The model enzyme was 14-α-demethylase lanosterol (code 3LD6), information on which was used from the database of the Protein Structures Database (PDB). Conclusions. As a result of the molecular docking, data were obtained that form an idea of a certain level of probability of the effect of synthesized compounds on the activity of 14α-demethylase lanosterol, which justified the need for further study of antifungal activity.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: актуальні питання фармацевтичної і медичної науки та практик...mentioning

confidence: 99%

“…The aim of the work was to synthesize compounds in the series 3-(5-(4-methoxyphenyl)pyrazole-3-yl)-6-R- [1,2,4] triazolo [3,4-b][1,3,4]thiadiazoles.…”

Section: Aimmentioning

confidence: 99%

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Synthesis and properties of some 3-(5-(4-methoxyphenyl)pyrazol-3-yl)-6-R-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles

Gotsulya

Панасенко

2022

АП

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Synthesis and properties of 3-(ethylthio)-9-methyl-6-(alkylthio)pyrazolo[1,5-d][1,2,4]triazolo[3,4-f][1,2,4]triazines

Fedotov

Gotsulya

2022

АП

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The combination of pyrazole and 1,2,4-triazole fragments in one structure makes it possible to achieve some success in creating potential biologically active compounds. Various factors contribute to this process. Among them, we can note the significant possibilities of chemical transformation involving these cycles, the simplicity, and reliability of methods, the creation of molecules with a certain level of bioavailability and the ability to influence a number of biochemical processes. Taking into account the presented facts, the creation of new compounds in a number of pyrazolo-triazole condensed systems is scientifically attractive with endowed features of practical significance and relevance. The aim of the work was to identify optimal conditions for the production of 3-(ethylthio)-9-methyl-6-(alkylthio)pyrazolo[1,5-d][1,2,4]triazolo[3,4-f][1,2,4]triazines and to study the properties of the target reaction products. Materials and methods. The chemical part of the work involved the step-by-step creation of target reaction products in the form of 3-(ethylthio)-9-methyl-6-(alkylthio)pyrazolo[1,5-d][1,2,4]triazolo[3,4-f][1,2,4]triazines. The first stage was aimed at conducting the interaction of diethyloxalate with acetone with the participation of sodium methylate in a methanol medium. Ethyl-2,4-dioxopentanoate was used in the conversion process to 3-methylpyrazole-5-carbohydrazide with the participation of hydrazine hydrate. Further modification of the molecule consisted of the gradual formation of the structure of 4-amino-5-(3-methylpyrazol-5-yl)-1,2,4-triazole-3-thiol. The next step involved the synthesis of 3-ethylthio-5-(3-methylpyrazol-5-yl)-1,2,4-triazole-4-amine. Further conversion included the production of potassium 3-ethylthio-9-methylpyrazolo[1,5-d][1,2,4]triazolo[3,4-f][1,2,4]triazine-6-thiolate and its S-alkyl derivatives along the triazine fragment. Cyclooxygenase-2, lanosterol-14α-demethylase and receptor tyrosine kinase were selected as model enzymes for docking, the crystal structure of which was loaded from the Protein Data Bank. Results. The synthesis of 3-(ethylthio)-9-methyl-6-(alkylthio)-pyrazolo[1,5-d][1,2,4]triazolo[3,4-f][1,2,4]triazines were carried out and the optimal conditions for the production of these substances were determined. The structure of the chemical transformation products was proved and the results of the study of the main physical properties were recorded. The results of virtual studies provided an opportunity to substantiate the prospects of the selected chemical transformation vector, which ultimately made it possible to determine the biological potential of the obtained compounds. Conclusions. Based on the results of the study, information was obtained that gives a certain idea of the possible level of influence of synthesized compounds on the activity of lanosterol-14α-demethylase, which makes it advisable to further search for substances with fungistatic and fungicidal effects.

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Quantitative determination of the components of the mixture – ear drops “Melavet” by the method of high-performance liquid chromatography

Parchenko,

Datsiuk,

Hunchak

et al. 2024

SMLNUVMB

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The pharmaceutical industry is one of the most regulated industries in the world, and most medicines remain safe and effective. The level of impurity and degradation products in active pharmaceutical ingredients (APIs) must be strictly controlled and meet the specifications required by international bodies. for many years, chromatography has been the method of choice for assessing the chemical purity of medicinal substances and products and has a wide range of applications in the pharmaceutical industry, from research and development to laboratory quality control. The ability to integrate mass spectrometry into the chromatography workflow has been a real breakthrough in the science of separation, finding many inscriptions, especially in the field of pharmaceutical analysis. Therefore, the relevance of the research lies in finding the quantity of the composition of the created mixture – ear drops “Melavet” by the HPLC method with mass detection of the initial components. The purpose of the work is to create analytical methods for determining the active components of the mixture when they are present in the sample and interact with each other. Materials and methods: Chromato-mass-spectrometric studies, high-performance liquid chromatography (HPLC, LCMS). LCMS device: Agilent 1200 Quaternary DAD HPLC System (degasser, binary pump, autosampler, column thermostat, diode-matrix detector; single-quadrupole mass spectrometer Agilent 1100 LCMSD SL instrument; OpenLAB CDS Software. For the new combined veterinary test of ear drops “Melavet” 10 ml, containing various components, it is necessary to develop optimal methods of standardization. For this, 6 solutions of the external standard of each component were prepared. Based on the research, a method was developed for the simultaneous determination of the components in the model mixture ear drops “Melavet” 10 ml by the method of high-performance liquid chromatography using the same mobile and stationary phases, as well as similar chromatographic conditions, which were used during the study of individual samples of the external standard. When analyzing the chromatographic data, the presence of dioxidin in the mixture was fully consistent. In comparison with the external standards of each component, there are separate icons of substances on the chromatogram of the mixture, which contain information about the purity of the components and the interaction between them. During the research, a highly sensitive technique for the simultaneous determination of the components of the model mixture “Melavet” ear drops 10 ml by the method of high-performance liquid chromatography was developed. The optimal conditions for the simultaneous determination of the components of the mixture in one sample are selected. It was established that there is no interaction between the components of the mixture when they are simultaneously in the sample solution.

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Method for Trifuzol-Neo assay determination by GC-MS

Cited by 3 publications

References 12 publications

Synthesis and properties of some 3-(5-(4-methoxyphenyl)pyrazol-3-yl)-6-R-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles

Synthesis and properties of some 3-(5-(4-methoxyphenyl)pyrazol-3-yl)-6-R-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles

Synthesis and properties of 3-(ethylthio)-9-methyl-6-(alkylthio)pyrazolo[1,5-d][1,2,4]triazolo[3,4-f][1,2,4]triazines

Quantitative determination of the components of the mixture – ear drops “Melavet” by the method of high-performance liquid chromatography

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