Month: April 2022

Safety of 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 Spray-dried voriconazole-cyclodextrin complexes: Solubility, dissolution rate and chemical stability. Author is Miletic, Tijana; Kyriakos, Kachrimanis; Graovac, Adrijana; Ibric, Svetlana.

The present work investigates the effect of complexation with hydroxypropyl-beta-cyclodextrin (HPBCD) and 2-O-methyl-beta-cyclodextrin (2-O-MBCD), on voriconazole solubility, dissolution rate and chem. stability. Drug-cyclodextrin complexes were prepared as aqueous solutions, which were spray-dried, and their properties were compared to wet ground samples and phys. mixtures DSC anal. revealed absence of crystalline voriconazole from spray-dried complexes. FTIR spectroscopy indicated changes in the H-bonding network of the hydroxyl groups of cyclodextrin following drug inclusion. Dissolution rate of voriconazole was significantly higher from spray-dried complexes with either cyclodextrin in comparison with free drug, phys. mixtures, or wet ground mixtures However, two degradation impurities were found in aged samples, with slightly higher impurity level with HPBCD. Performed solubility studies suggested that 2-O-MBCD is more efficient solubilizer. Mol. docking simulations showed a difference in the 1:1 binding affinities and sites, with HPBCD surprisingly forming complexes of much lower energy, thus suggesting a multiple rather than a 1:1 complexation.

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

Computed Properties of C7H7NO2. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 6-Methylnicotinic acid, is researched, Molecular C7H7NO2, CAS is 3222-47-7, about A tautomeric ligand enables directed C-H hydroxylation with molecular oxygen. Author is Li, Zhen; Wang, Zhen; Chekshin, Nikita; Qian, Shaoqun; Qiao, Jennifer X.; Cheng, Peter T.; Yeung, Kap-Sun; Ewing, William R.; Yu, Jin-Quan.

Hydroxylation of aryl carbon-hydrogen bonds with transition metal catalysts has proven challenging when oxygen is used as the oxidant. Here, we report a palladium complex bearing a bidentate pyridine/pyridone ligand that efficiently catalyzes this reaction at ring positions adjacent to carboxylic acids. IR, x-ray, and computational anal. support a possible role of ligand tautomerization from mono-anionic (L,X) to neutral (L,L) coordination in the catalytic cycle of aerobic carbon-hydrogen hydroxylation reaction. The conventional site selectivity dictated by heterocycles is overturned by this catalyst, thus allowing late-stage modification of compounds of pharmaceutical interest at previously inaccessible sites.

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

Chai, Xiaoyun; Zhang, Jun; Yu, Shichong; Hu, Honggang; Zou, Yan; Zhao, Qingjie; Dan, Zhigang; Zhang, Dazhi; Wu, Qiuye published the article 《Design, synthesis, and biological evaluation of novel 1-(1H-1,2,4-triazole-1-yl)-2-(2,4-difluorophenyl)-3-substituted benzylamino-2-propanols》. Keywords: triazolyl difluorophenyl aralkylamino propanol preparation antifungal activity computational chem.They researched the compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone( cas:86404-63-9 ).Electric Literature of C10H7F2N3O. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:86404-63-9) here.

Based on the results of computational docking to the active site of the cytochrome P 450 14α-demethylase (CYP51), a series of 1-(1H-1,2,4-triazole-1-yl)-2-(2,4-difluorophenyl)-3-substituted benzylamino-2-propanols, e.g., I, as analogs of fluconazole were designed, synthesized, and evaluated as antifungal agents. Results of preliminary antifungal tests against eight human pathogenic fungi in vitro showed that all the title compounds exhibited excellent activities with broad spectrum.

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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 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 Synthesis of fluconazole. Author is Wang, Jianxiang.

The improved synthetic technol. of fluconazole was presented. Fluconazole was produced by 4-step reactions with m-difluorobenzenes as starting material and PEG as phase-transfer catalyst, including acylating with chloroacetyl chloride, substitution reaction with 1,2,4-triazole, the reaction with Me3SOI, and ring opening with 1,2,4-triazole. The product could remove impurity of identical structure after recrystallization, with a yield above 50%. The purity of product was above 98.5%, the quality was stable, and the process is reliable.

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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 Design and optimisation of a small-molecule TLR2/4 antagonist for anti-tumour therapy, published in 2021, which mentions a compound: 3222-47-7, mainly applied to nitrovinyl arene preparation antitumor SAR, Formula: C7H7NO2.

A small-mol. co-inhibitor that targets the TLR2/4 signalling pathway were developed. After high-throughput screening of a compound library containing 14400 small mols., followed by hit-to-lead structural optimization, the compound I was finally obtained, which has effective inhibitory properties against the TLR2/4 signalling pathways. This compound was found to significantly inhibit multiple pro-inflammatory cytokines released by RAW264.7 cells. This was followed by compound I demonstrating promising efficacy in subsequent anti-tumor experiments The current results provided a novel understanding of the role of TLR2/4 in cancer and a novel strategy for anti-tumor therapy.

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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 Novel alkylated azoles as potent antifungals, the main research direction is triazole preparation antifungal; Cytotoxicity; Ergosterol; Fluconazole; Hemolysis; Time-kill curves.Application In Synthesis of 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone.

The synthesis of new FLC derivatives I (R = 2,4-Cl2, 2-F, 3-F, 4-F, etc.; n = 0, 1, 2, 3, 4, 5) along with their antifungal activity against a panel of 13 clin. relevant fungal strains was developed. Also, their toxicity against mammalian cells, their hemolytic activity, as well as their mechanism of action were explored. Overall, many of our FLC derivatives I exhibited broad-spectrum antifungal activity and all compounds displayed an MIC value of <0.03 μg/mL against at least one of the fungal strains tested. Also, they were found to be less hemolytic and less cytotoxic to mammalian cells than the FDA approved antifungal agent amphotericin B. The mechanism of action of compounds has been demonstrated as best derivative for the inhibition of the sterol 14α-demethylase enzyme, involved in ergosterol biosynthesis. When you point to this article, it is believed that you are also very interested in this compound(86404-63-9)Application In Synthesis of 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone and due to space limitations, I can only present the most important information.

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

Creaser, Colin S.; Stygall, James W.; Bowen, David V.; Pullen, Frank S. published the article 《Particle beam-mass spectrometric analysis of difluorophenyl triazole compounds using normal phase-HPLC》. Keywords: fluconazole determination HPLC mass spectrometry; fluorophenyl triazole HPLC mass spectrometry.They researched the compound: 1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone( cas:86404-63-9 ).Category: triazoles. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:86404-63-9) here.

Normal phase liquid chromatog. combined with particle beam mass spectrometry has been applied to the anal. of fluconazole, an anti-fungal agent, [2-(2,4-difluorophenyl)-1,3-bis(1H-1,2,4-triazol-1-yl)propan-2-ol] and a related intermediate, UK-51060 [2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)ethan-2-one]. Electron ionization and chem. ionization have been investigated in combination with quadrupole ion trap and magnetic sector mass spectrometers and the spectra obtained compared with those for direct probe anal. A novel method for the introduction of the chem. ionization reagent gas via the interface is described for particle beam-magnetic sector mass spectrometry. Multi-stage scan routines have been implemented on the ion trap for the selective storage of analyte species and removal of solvent ions. Detection limits for both spectrometers have been determined and are discussed in terms of interface geometry and analyte transport characteristics. Normal phase HPLC on silica provided a good separation of the intermediate from the later eluting fluconazole peak.

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

Roffey, S. J.; Cole, S.; Comby, P.; Gibson, D.; Jezequel, S. G.; Nedderman, A. N. R.; Smith, D. A.; Walker, D. K.; Wood, N. 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 ).Related Products of 86404-63-9. 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.

Voriconazole is a new triazole antifungal agent with potent, wide-spectrum activity. Its pharmacokinetics and metabolism have been studied in mouse, rat, rabbit, dog, guinea pig, and humans after single and multiple administration by both oral and i.v. routes. Absorption of voriconazole is essentially complete in all species. The elimination of voriconazole is characterized by non-linear pharmacokinetics in all species. Consequently, pharmacokinetic parameters are dependent upon dose, and a superproportional increase in area under the curve is seen with increasing dose in rat and dog toxicol. studies. Following multiple administration, there is a decrease in systemic exposure. This is most pronounced in mouse and rat, less so in dog, and not observed in guinea pig or rabbit. Repeat-dose toxicol. studies in mouse, rat, and dog have demonstrated that induction of cytochrome P 450 by voriconazole (autoinduction of metabolism) is responsible for the decreased exposure in these species. Autoinduction of metabolism is not observed in humans, and plasma steady-state concentrations remain constant with time. Voriconazole is extensively metabolized in all species. The major pathways in humans involve fluoropyrimidine N-oxidation, fluoropyrimidine hydroxylation, and Me hydroxylation. Also, N-oxidation facilitates cleavage of the mol., resulting in loss of the fluoropyrimidine moiety and subsequent conjugation with glucuronic acid. Major pathways are represented in animal species. The major circulating metabolite in rat, dog, and human is the N-oxide of voriconazole. It is not thought to contribute to efficacy since it is at least 100-fold less potent than voriconazole against fungal pathogens in vitro.

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

Srinivasulu, Vunnam; Reddy, Amarnath; Mazitschek, Ralph; Lukens, Amanda K.; Wirth, Dyann F.; Li, Liang; Naumov, Pance; O’Connor, Matthew John; Al-Tel, Taleb H. published the article 《Intramolecular Diaza-Diels-Alder Protocol: A New Diastereoselective and Modular One-Step Synthesis of Constrained Polycyclic Frameworks》. Keywords: diastereoselective modular polycyclic benzopyran benzoxepine preparation antimalarial activity SAR; acid mediated diaza Diels Alder reaction benzaldehyde aminoazine; antimalarial activity; cycloaddition; polycycles; structure-activity relationships; synthesis design.They researched the compound: 4-(4-Bromophenyl)-5-methylthiazol-2-amine( cas:65705-44-4 ).Safety of 4-(4-Bromophenyl)-5-methylthiazol-2-amine. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:65705-44-4) here.

Phenotype-based screening of diverse compound collections generated by privileged substructure-based diversity-oriented synthesis (pDOS) is considered one of the prominent approaches in the discovery of novel drug leads. However, one key challenge that remains is the development of efficient and modular synthetic routes toward the facile access of privileged small-mol. libraries with skeletal and stereochem. complexity and drug-like properties. In this regard, a novel and diverse one-pot procedure for the diastereoselective synthesis of privileged polycyclic benzopyrans and benzoxepines is described herein. These unexplored chemotypes were accessed by utilizing an acid-mediated diaza-Diels-Alder reaction of 2-allyloxy- and/or homoallyloxy benzaldehyde with 2-aminoazine building blocks. Profiling of representative analogs against blood-stage Plasmodium falciparum parasites identified three lead candidates with low micromolar antimalarial activity.

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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: 4-(4-Bromophenyl)-5-methylthiazol-2-amine(SMILESS: NC1=NC(C2=CC=C(Br)C=C2)=C(C)S1,cas:65705-44-4) is researched.Computed Properties of C4H6O4. The article 《Aminothiazole-Featured Pirinixic Acid Derivatives As Dual 5-Lipoxygenase and Microsomal Prostaglandin E2 Synthase-1 Inhibitors with Improved Potency and Efficiency in Vivo》 in relation to this compound, is published in Journal of Medicinal Chemistry. Let’s take a look at the latest research on this compound (cas:65705-44-4).

Dual inhibition of microsomal prostaglandin E2 synthase-1 (mPGES-1) and 5-lipoxygenase (5-LO) is currently pursued as potential pharmacol. strategy for treatment of inflammation and cancer. Here we present a series of 26 novel 2-aminothiazole-featured pirinixic acid derivatives as dual 5-LO/mPGES-1 inhibitors with improved potency (exemplified by compound 2-[(4-chloro-6-{[4-(naphthalen-2-yl)-1,3-thiazol-2-yl]-amino}-pyrimidin-2-yl)-sulfanyl]-octanoic acid (I) with IC50 = 0.3 and 0.4 μM, resp.) and bioactivity in vivo. Computational anal. presumes binding sites of I at the tip of the 5-LO catalytic domain and within a subpocket of the mPGES-1 active site. Compound I (10 μM) hardly suppressed cyclooxygenase (COX)-1/2 activities, failed to inhibit 12/15-LOs, and is devoid of radical scavenger properties. Finally, compound I reduced vascular permeability and inflammatory cell infiltration in a zymosan-induced mouse peritonitis model accompanied by impaired levels of cysteinyl-leukotrienes and prostaglandin E2. Together, 2-aminothiazole-featured pirinixic acids represent potent dual 5-LO/mPGES-1 inhibitors with an attractive pharmacol. profile as anti-inflammatory drugs.

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