Day: April 11, 2022

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, Research Support, Non-U.S. Gov’t, Bioorganic & Medicinal Chemistry Letters called Discovery of highly potent novel antifungal azoles by structure-based rational design, Author is Wang, Wenya; Sheng, Chunquan; Che, Xiaoying; Ji, Haitao; Cao, Yongbing; Miao, Zhenyuan; Yao, Jianzhong; Zhang, Wannian, the main research direction is azole preparation lanosterol demethylase inhibitor antifungal SAR.Category: triazoles.

On the basis of the active site of lanosterol 14α-demethylase from Candida albicans (CACYP51), a series of new azoles were designed and synthesized. All the new azoles show excellent in vitro activity against most of the tested pathogenic fungi, which represent a class of promising leads for the development of novel antifungal agents. The MIC80 value of compounds 8c, 8i and 8n against C. albicans is 0.001 μg/mL, indicating that these compounds are more potent than fluconazole, itraconazole and voriconazole. Flexible mol. docking was used to analyze the structure-activity relationships (SARs) of the compounds The designed compounds interact with CACYP51 through hydrophobic, van der Waals and hydrogen-bonding interactions.

In addition to the literature in the link below, there is a lot of literature about this compound(1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone)Category: triazoles, illustrating the importance and wide applicability of this compound(86404-63-9).

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

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 86404-63-9, is researched, Molecular C10H7F2N3O, about Direct resolution of a new antifungal agent, voriconazole (UK-109,496) and its potential impurities, by use of coupled achiral-chiral high-performance liquid chromatography, the main research direction is voriconazole resolution HPLC; enantiomer separation voriconazole HPLC.Category: triazoles.

Coupled achiral-chiral high-performance liquid chromatog. (HPLC) with an achiral amino-based column coupled with a chiral amylose-based column was used for qual. and quant. determination of the potential chiral and achiral impurities of voriconazole (UK-109,496), a new antifungal agent with two stereogenic centers. The effect of the organic mobile-phase modifier, ethanol, was studied. The assay response was linearly dependent on concentration over the range 1.2-40.4 μg for voriconazole and 2.5-104.0 ng for the impurities. The limit of detection was 2.5 ng for each analyte.

In addition to the literature in the link below, there is a lot of literature about this compound(1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone)Category: triazoles, illustrating the importance and wide applicability of this compound(86404-63-9).

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

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Catalytic enantioselective pyridine N-oxidation, published in 2019-11-20, which mentions a compound: 3222-47-7, Name is 6-Methylnicotinic acid, Molecular C7H7NO2, Name: 6-Methylnicotinic acid.

The catalytic, enantioselective N-oxidation of substituted pyridines is described. The approach is predicated on a biomol.-inspired catalytic cycle wherein high levels of asym. induction are provided by aspartic-acid-containing peptides as the aspartyl side chain shuttles between free acid and peracid forms. Desymmetrizations of bis(pyridine) substrates bearing a remote pro-stereogenic center substituted with a group capable of hydrogen bonding to the catalyst are demonstrated. Our approach presents a new entry into chiral pyridine frameworks in a heterocycle-rich mol. environment. Representative functionalizations of the enantioenriched pyridine N-oxides further document the utility of this approach. Demonstration of the asym. N-oxidation in two venerable drug-like scaffolds, Loratadine and Varenicline, show the likely generality of the method for highly variable and distinct chiral environments, while also revealing that the approach is applicable to both pyridines and 1,4-pyrazines.

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

Yang, Hye Sung; Macha, Lingamurthy; Ha, Hyun-Joon; Yang, Jung Woon published an article about the compound: 6-Methylnicotinic acid( cas:3222-47-7,SMILESS:O=C(O)C1=CN=C(C)C=C1 ).Recommanded Product: 6-Methylnicotinic acid. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:3222-47-7) through the article.

For the first time, both 1,3-chelation and the formation of a tetrahedral intermediate were confirmed as the key factors for the unusual nucleophilic behavior of a metal t-butoxide in a transesterification reaction. NMR and real-time IR spectroscopies and deuterium-labeling experiments were used for the mechanistic investigation. Based on a pivotal point in the mechanistic understanding of the action of t-butoxide anion, several uncovering reactions such as direct access to value-added chiral α-amino acid t-Bu ester with almost complete retention of optical purity via elaborative transesterification, non-hydrolytic deesterification of esters, and selective bond cleavage of 3-benzoyloxazolidin-2-ones, were successfully achieved.

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

Category: triazoles. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone, is researched, Molecular C10H7F2N3O, CAS is 86404-63-9, about Development and validation of a liquid chromatographic method for the stability study of a pharmaceutical formulation containing voriconazole using cellulose tris(4-chloro-3-methylphenylcarbamate) as chiral selector and polar organic mobile phases. Author is Servais, Anne-Catherine; Moldovan, Radu; Farcas, Elena; Crommen, Jacques; Roland, Isabelle; Fillet, Marianne.

The ophthalmic solution of voriconazole, i.e. (2R,3S)-2-(2,4-difluorophenyl)-3-(5-fluoropyrimidin-4-yl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol, made from an injection formulation which also contains sulfobutylether-β-cyclodextrin sodium salt as an excipient (Vfend), is used for the treatment of fungal keratitis. A liquid chromatog. (LC) method using polar organic mobile phase and cellulose tris(4-chloro-3-methylphenylcarbamate) coated on silica as chiral stationary phase was successfully developed to evaluate the chiral stability of the ophthalmic solution The percentage of methanol (MeOH) in the mobile phase containing acetonitrile (ACN) as the main solvent significantly influenced the retention and resolution of voriconazole and its enantiomer ((2S,3R)-2-(2,4-difluorophenyl)-3-(5-fluoropyrimidin-4-yl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol). The optimized mobile phase consisted of ACN/MeOH/diethylamine/trifluoroacetic acid (80/20/0.1/0.1; volume/volume/volume/volume). The method was found to be selective not only regarding the enantiomer of voriconazole but also regarding the specified impurities described in the monograph from the European Pharmacopoeia. The LC method was then fully validated applying the strategy based on total measurement error and accuracy profiles. Under the selected conditions, the determination of 0.1% of voriconazole enantiomer could be performed. Finally, a stability study of the ophthalmic solution was conducted using the validated LC method.

There are many compounds similar to this compound(86404-63-9)Category: triazoles. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

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

Yu, Guang-yan; Li, Chen; Xiao, Tao; Li, Song; Tian, Xin published an article about the compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone( cas:86404-63-9,SMILESS:FC1=CC=C(C(CN2N=CN=C2)=O)C(F)=C1 ).Reference of 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:86404-63-9) through the article.

In the title compound, C10H8F2N4O, the dihedral angle between the rings is 65.4(1)°. In the crystal, intermol. O-H…N and C-H…F H bonds link the mols. in a stacked arrangement along the a and c axes, resp. Crystallog. data and at. coordinates are given.

There are many compounds similar to this compound(86404-63-9)Reference of 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

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

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《5-(p-Aminobenzenesulfonamido)thiazole》. Authors are Arnold, M. H. M.; Scaife, C. W..The article about the compound:5-Aminothiazole-2-carbonitrilecas:860182-74-7,SMILESS:N#CC1=NC=C(N)S1).COA of Formula: C4H3N3S. Through the article, more information about this compound (cas:860182-74-7) is conveyed.

5-Amino-2-thiazolethiocarboxamide (I) (chrysean of Wallach, Ber. 7, 902(1874)), m. 204° (decomposition), results in 25-g. yield by passing H2S (20-30 l./hr.) into saturated aqueous NaCN and a little NH4OH for 3-4 hrs.; acidification of the filtrate gives 30-40% (of the NaCN) of a reddish brown precipitate which decomposes on heating with H2O to give H2S and a black alkali-soluble tar. Many other methods were tried with yields not over 15-20%. I (10 g.) and 23.9 g. Pb(OAc)2 in 70 ml. H2O, refluxed 3 hrs., give 5-amino-2-thiazolecarbonitrile (II), m. 103° (Hellsing, Ber. 32, 1497(1899)). If the filtrate containing II is treated with CaCO3 in slight excess above that required to neutralize the AcOH and the mixture is refluxed 2 hrs., there results a good yield of 5-amino-2-thiazolecarboxamide, decomposes 156°. Hydrolysis of II with dilute HCl gives a small yield of 2-amino-2-thiazolecarboxylic acid, decomposes 185°; this could not be decarboxylated to 5-aminothiazole. II and BzH in EtOH give the 5-benzylideneamino compound, light yellow, m. 141°; this and the benzylidene derivative of I are too easily hydrolyzed for this method of protecting the NH2 group to be of any use. Attempts to diazotize I and II in the normal way gave highly colored tars, which appeared to be formed by intermol. condensation; II is diazotized by gradual addition of the solution to excess of HCl and NaNO2 at 0°; I has been diazotized by adding its solution in C5H5N to excess of NOCl in C6H6. I and p-O2NC6H4SO2Cl in C5H5N give the 5-(p-nitrophenylsulfonamido) compound, m. 185° (decomposition); the same derivative of II m. 148°. p-AcNHC6H4SO2Cl and I in C5H5N give the 5-(p-acetamidophenylsulfonamido) compound (III), m., 253-5° (decomposition); shaking with PbCO3 and refluxing the filtrate for 3 hrs. give a moderately good yield of 5-sulfanilamidothiazole (IV), m. 185° (decomposition). III is completely inactive against streptococcal infections and IV, although active, has no advantage over established sulfonamide drugs.

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

Computed Properties of C7H7NO2. 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: 6-Methylnicotinic acid, is researched, Molecular C7H7NO2, CAS is 3222-47-7, about Unexpected small molecules as novel SIRT2 suicide inhibitors. Author is Chen, Xiaoxue; Zou, Yefang; Wang, Jie; Cao, Zhuoxian; Liu, Jingzi; Li, Yan; Zhao, Yonglong; He, Bin.

A series of sirtuin inhibitor candidates were assembled based on an intermediate ester (1a) our accidently discovered. After screening and evaluation, several SIRT2 selective inhibitors were identified, which can inhibit all the deacetylation, defatty-acylation and debenzoylation of SIRT2. Among these inhibitors, compound 1e was the best SIRT2 selective inhibitors. The primary study on the inhibitory mechanism indicated that compound 1e may be a suicide inhibitor acting as an irreversible way. Given almost all reported sirtuin inhibitors are non-covalent, sirtuin covalent inhibitors are still need to be developed. These findings will facilitate for further development of SIRT2 selective and suicide inhibitors.

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

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone, is researched, Molecular C10H7F2N3O, CAS is 86404-63-9, about Development & validation of stability indicating UPLC method for quantitative estimation of voriconazole and its impurities in drug substance, the main research direction is voriconazole flow rate photolytic stability RP UPLC.Quality Control of 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone.

Simple and sensitive RP-UPLC method for the separation and quantification of voriconazole and its impurities are described. Samples are analyzed by means of reverse phase (RP-UPLC) using an Acquity UPLC BEH Shield RP18 (2.1mm x 100mm, 1.7μ), and the mobile phase consists of two Channels A and B. Channel-A 0.05% TFA in water and Channel-B: 0.05% TFA in methanol. The flow rate is 0.2 mL/min. The column temperature was maintained at 30°C and sample temperature was maintained at ambient and wavelength fixed at 255nm UVdetection. It is found that the method of RP-UPLC with UV-detection system for the anal. of voriconazole impurities are straight forward and applied in qual. and quant. anal. The developed UPLC method was validated with respect to specificity, precision, linearity, ruggedness and robustness. Validation study compared as per ICH guideline.

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

Name: 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 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