Category: Triazoles

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 6-Methylnicotinic acid( cas:3222-47-7 ) is researched.Product Details of 3222-47-7.Kopriva, Ivica; Jeric, Ivanka; Hadzija, Marijana Popovic; Hadzija, Mirko; Lovrencic, Marijana Vucic published the article 《Non-negative Least Squares Approach to Quantification of 1H Nuclear Magnetic Resonance Spectra of Human Urine》 about this compound( cas:3222-47-7 ) in Analytical Chemistry (Washington, DC, United States). Keywords: non neg least squares method NMR spectra; urine analysis diabetes type two. Let’s learn more about this compound (cas:3222-47-7).

Because of its quant. character and capability for high-throughput screening, 1H NMR (NMR) spectroscopy is used extensively in the profiling of biofluids such as urine and blood plasma. However, the narrow frequency bandwidth of 1H NMR spectroscopy leads to a severe overlap of the spectra of components present in the complex mixtures such as biofluids. Therefore, 1H NMR-based metabolomics anal. is focused on targeted studies related to concentrations of the small number of metabolites. Here, we propose a library-based approach to quantify proportions of overlapping metabolites from 1H NMR mixture spectra. The method boils down to the linear non-neg. least squares (NNLS) problem, whereas proportions of the pure components contained in the library stand for the unknowns. The method is validated on an estimation of the proportions of (i) the 78 pure spectra, presumably related to type 2 diabetes mellitus (T2DM), from their synthetic linear mixture; (ii) metabolites present in 62 1H NMR spectra of urine of subjects with T2DM and 62 1H NMR spectra of urine of control subjects. In both cases, the inhouse library of 210 pure component 1H NMR spectra represented the design matrix in the related NNLS problem. The proposed method pinpoints 63 metabolites that in a statistically significant way discriminate the T2DM group from the control group and 46 metabolites discriminating control from the T2DM group. For several T2DM-discriminative metabolites, we prove their presence by independent anal. determination or by pointing out the corresponding findings in the published literature.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone(SMILESS: FC1=CC=C(C(CN2N=CN=C2)=O)C(F)=C1,cas:86404-63-9) is researched.Product Details of 111-18-2. The article 《(Z)-1-[4-Fluoro-2-(pyrrolidin-1-yl)phenyl]-3-phenyl-2-(1H-1,2,4-triazol-1-yl)prop-2-en-1-one》 in relation to this compound, is published in Acta Crystallographica, Section E: Structure Reports Online. Let’s take a look at the latest research on this compound (cas:86404-63-9).

In the title mol., C21H19FN4O, the triazole ring forms dihedral angles of 67.0 (1) and 59.6 (1)° with the Ph and fluoro-substituted benzene rings, resp. The dihedral angle between the Ph ring and the fluoro-substituted benzene ring is 79.1 (1)°. The pyrrolidine ring is in a half-chair conformation. In the crystal, weak C-H···O and C-H···N hydrogen bonds connect mols. into layers parallel to (001). Crystallog. data are given.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

HPLC of Formula: 86404-63-9. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone, is researched, Molecular C10H7F2N3O, CAS is 86404-63-9, about Optimization and study on the synthesis of fluconazole. Author is Wu, Chunli; Li, Xing; Shi, Xiufang; Shi, Yuntao; Wang, Minglin.

An improved process for the preparation of fluconazole is described. 1,3-Difluorobenzene underwent Friedel-Crafts acetylation with chloroacetyl chloride without solvent to give 2,4-difluorophenylacetyl chloride in 98% yield. This chloride was substituted with 1H-1,2,4-triazole in refluxing toluene in the presence of sodium bicarbonate, leading to 1-(2,4-difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone in 71% yield. Finally, one-pot Corey-Chaykovsky reaction of the carbonyl with Me3SOI followed by ring-opening with 1H-1,2,4-triazole to afford fluconazole in 76% yield.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Recommanded Product: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone, is researched, Molecular C10H7F2N3O, CAS is 86404-63-9, about Discovery of highly potent antifungal triazoles by structure-based lead fusion. Author is Wang, Wenya; Wang, Shengzheng; Dong, Guoqiang; Liu, Yang; Guo, Zizhao; Miao, Zhenyuan; Yao, Jianzhong; Zhang, Wannian; Sheng, Chunquan.

By means of structure-based lead fusion, a series of novel drug-like azoles possessing 4-(benzyloxy)piperidin-1-yl side chains were rationally designed and synthesized. Flexible mol. docking studies indicated that the newly synthesized azoles took advantages of the key interactions between the two lead structures and CACYP51. As a result, they revealed improved antifungal activity and broader spectrum. All the new azoles showed good to excellent in vitro antifungal activity against all of the tested pathogenic fungi (MIC80 range: 2.33-0.01 μM). Compounds 10a, 10g and 10h, the most active azoles toward Candida albicans (MIC80 = 0.01 μM) are 82 fold more potent than fluconazole. In particular, all the compounds also showed good activity against Aspergillus fumigatus (MIC80 = 2.33-0.55 μM) that is not sensitive to fluconazole.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 86404-63-9, is researched, SMILESS is FC1=CC=C(C(CN2N=CN=C2)=O)C(F)=C1, Molecular C10H7F2N3OJournal, Article, Acta Crystallographica, Section E: Structure Reports Online called 2-Bromo-2-(5-bromo-1H-1,2,4-triazol-1-yl)-1-(2,4-difluorophenyl)ethanone, Author is Wan, Kun; Fang, Bo; Wang, Guang Zhou; Zhou, Cheng He, the main research direction is bromo bromotriazolyl difluorophenylethanone crystal structure; mol structure bromobromotriazolyl difluorophenylethanone; weak hydrogen bond bromobromotriazolyldifluorophenylethanone.Category: triazoles.

In the title compound, C10H5Br2F2N3O, the mean planes of the benzene and triazole rings form a dihedral angle of 84.86 (2)°. In the crystal structure, weak intermol. C-H…O hydrogen bonds link mols. into extended chains propagating along the c axis. Crystallog. data are given.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Sheng, Chunquan; Chen, Yi; Zhang, Wannian; Song, Yunlong; Ji, Haitao; Zhou, Youjun; Zhu, Ju; Lu, Jiaguo researched the compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone( cas:86404-63-9 ).Reference of 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone.They published the article 《Optimization of the synthesis of the key intermediate of fluconazole by the orthogonal experimental design》 about this compound( cas:86404-63-9 ) in Zhongguo Yaowu Huaxue Zazhi. Keywords: fluconazole intermediate preparation optimization. We’ll tell you more about this compound (cas:86404-63-9).

Optimization of the preparation of 1-[2-(2,4-difluorophenyl)-2,3-epoxypropyl]-1H-1,2,4-triazole methanesulfonate, an intermediate in fluconazole synthesis, by reacting 2′,4′-difluoro-2-(1H-1,2,4-triazol-1-yl)acetophenone with trimethylsulfoxonium iodide was carried out using orthogonal exptl. design. The yield reached 62.34%.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone( cas:86404-63-9 ) is researched.Formula: C10H7F2N3O.Wen, Qin-Mei; Yin, Ben-Tao; Yan, Cong-Yan; Zhou, Cheng-He published the article 《(Z)-1-[4-Fluoro-2-(pyrrolidin-1-yl)phenyl]-3-phenyl-2-(1H-1,2,4-triazol-1-yl)prop-2-en-1-one》 about this compound( cas:86404-63-9 ) in Acta Crystallographica, Section E: Structure Reports Online. Keywords: crystal structure hydrogen bond conformation fluoropyrrolidinylphenylphenyltriazolylpropenone; mol structure fluoropyrrolidinylphenylphenyltriazolylpropenone. Let’s learn more about this compound (cas:86404-63-9).

In the title mol., C21H19FN4O, the triazole ring forms dihedral angles of 67.0 (1) and 59.6 (1)° with the Ph and fluoro-substituted benzene rings, resp. The dihedral angle between the Ph ring and the fluoro-substituted benzene ring is 79.1 (1)°. The pyrrolidine ring is in a half-chair conformation. In the crystal, weak C-H···O and C-H···N hydrogen bonds connect mols. into layers parallel to (001). Crystallog. data are given.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Method development and validation study for quantitative determination of genotoxic impurity and its precursor in fluconazole sample by liquid chromatography-tandem mass spectrometry, published in 2016, which mentions a compound: 86404-63-9, mainly applied to fluconazole liquid chromatog tandem mass spectrometry, Electric Literature of C10H7F2N3O.

Objective: The objective of this work is method development and validation study for quant. determination of 1-[2-(2,4-difluorophenyl)-2,3-epoxypropyl]-1H-1,2,4-triazole, a genotoxic impurity and its precursor in a fluconazole drug sample by liquid chromatog.-tandem mass spectrometry. Methods: LC-MS/MS anal. of these impurities was performed on Hypersil BDS C18 (100 mm x 4.0 mm, 3 μm) column. 5 mmol ammonium acetate and acetonitrile in the ratio of 65:35 (volume/volume) was used as the mobile phase with a flow rate of 0.4 mL/min. The developed method was accomplished with a short run time of 10 min. Triple quadrupole mass detector coupled with pos. electrospray ionization was used for the quantification of genotoxic impurities in multiple reaction monitoring (MRM). Results: The method was validated as per International Conference on Harmonization (ICH) guidelines. The method was linear in the range of 0.30 μg/g to 11.37 μg/g for impurity A and 0.30 μg/g to 11.34 μg/g for impurity B with a correlation coefficient of 0.999. The accuracy of the method was in the range of 98.25 % to 100.53 % for both impurities. Conclusion: A specific, selective, highly sensitive and more accurate anal. method using LC-MS/MS coupled with pos. electrospray ionization has been developed for the quantification of genotoxic impurity (1-[2-(2,4-difluorophenyl)-2,3-epoxypropyl]-1H-1,2,4-triazole) and its precursor (1-(2,4-difluorophenyl)-2-[1,2,4]triazol-1-yl-ethanone) at 0.3 μg/g with respect to the 5.0 mg/mL of fluconazole.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Application In Synthesis of 4-(4-Bromophenyl)-5-methylthiazol-2-amine. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 4-(4-Bromophenyl)-5-methylthiazol-2-amine, is researched, Molecular C10H9BrN2S, CAS is 65705-44-4, about Synthesis and antimicrobial activities of some novel 2,3-substituted-1,3-thiazolidin-4-ones derived from 2-amino-1,3-thiazole.

New 2,3-substituted-1,3-thiazolidin-4-one (6a-f) were prepared by cyclocondensation of 2-[6-(4-chlorobenzyloxy)-2-naphthyliden]-4- (4-substituted phenyl)-5-methyl-1,3-thiazole (5a-f) and mercaptoacetic acid in benzene. The synthesized compounds were characterized on the basis of elemental anal., 1H NMR, 13C NMR and FT-IR. The prepared compounds have been screened in vitro against two Gram- pos. Staphylococcus aureus, Staphylococcus epidermidis, and two Gram-neg. Escherichia coli, Pseudomonas aernuginosa for antibacterial activity and two fungal strains Candida albicans, Candida krusei for antifungal activity using ciprofloxacin, ampicillin and ketoconazole with minimal inhibitory concentration (MIC) value of 10 mcg/L in DMSO. Compounds 6a and 6d showed good antibacterial and antifungal activities compared to reference medications utilized within this study.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Quality Control of 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone, is researched, Molecular C10H7F2N3O, CAS is 86404-63-9, about ‘Online’ liquid chromatography/nuclear magnetic resonance mass spectrometry – a powerful spectroscopic tool for the analysis of mixtures of pharmaceutical interest. Author is Pullen, Frank S.; Swanson, Alistair G.; Newman, Michael J.; Richards, Don S..

Liquid chromatog. (LC), simultaneously coupled with both NMR and mass spectrometry (MS) ‘online’ is a powerful structural tool and has a potentially vast range of uses within the pharmaceutical industry. Data from a mixture of fluconazole and related triazoles were obtained from an LC/NMR-MS system developed ‘inhouse’, demonstrating the power of this novel anal. approach.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics