Category: ethers-buliding-blocks

Synthetic Route of C17H19N3O2S. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Improved procedure for quantitation of omeprazole and metabolites using reversed-phase high-performance liquid chromatography. Author is Amantea, Michael A.; Narang, Prem K..

An HPLC procedure for the determination of omeprazole and its sulfone and sulfide metabolites in human plasma was developed by using a C8 reversed-phase column with a mobile phase of MeOH-MeCN-0.025M phosphate buffer (40:8:52) adjusted to pH 7.4 with 85% H3PO4 and detection at 302 nm. The level of detection was 5, 10, and 7.5 ng/mL for omeprazole, its sulfone, and the sulfide, resp. and the intraday variability ranged 2.6-10.3 and 2.0-3.5% at 10 and 125 ng/mL, resp. The recoveries were 96, 42, and 96% for omeprazole, the sulfone, and the sulfide, resp.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Synthesis and characterization of 3-substituted indole derivatives as novel Mannich bases, the main research direction is piperazinyl methyl indole preparation; indole piperazine formalin Mannich microwave irradiation.Safety of 4-(Piperazin-1-yl)phenol.

In this study, indole-based 4-substituted piperazine derivatives I [R = Me, 4-BrC6H4, 4-HOC6H4, 4-F3C6H4, etc.] were synthesized via Mannich reaction with microwave assisted synthesis and the conventional reflux heating method. Microwave assisted synthesis was more preferable than reflux method since the microwave irradiation lead to a higher product yields with better purity and improved energy efficiency with shortened reaction time. The structures of 3-substituted indole derivatives I were characterized by FT-IR, elemental anal., 1H NMR and 13C NMR spectroscopy.

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Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Research Support, Non-U.S. Gov’t, Research Support, N.I.H., Extramural, ACS Chemical Biology called Molecular Mechanism for Isoform-Selective Inhibition of Acyl Protein Thioesterases 1 and 2 (APT1 and APT2), Author is Won, Sang Joon; Davda, Dahvid; Labby, Kristin J.; Hwang, Sin Ye; Pricer, Rachel; Majmudar, Jaimeen D.; Armacost, Kira A.; Rodriguez, Laura A.; Rodriguez, Christina L.; Chong, Fei San; Torossian, Kristopher A.; Palakurthi, Jasmine; Hur, Edward S.; Meagher, Jennifer L.; Brooks, Charles L.; Stuckey, Jeanne A.; Martin, Brent R., which mentions a compound: 56621-48-8, SMILESS is OC1=CC=C(N2CCNCC2)C=C1, Molecular C10H14N2O, HPLC of Formula: 56621-48-8.

Post-translational S-palmitoylation directs the trafficking and membrane localization of hundreds of cellular proteins, often involving a coordinated palmitoylation cycle that requires both protein acyltransferases (PATs) and acylprotein thioesterases (APTs) to actively redistribute S-palmitoylated proteins toward different cellular membrane compartments. This process is necessary for the trafficking and oncogenic signaling of S-palmitoylated Ras isoforms, and potentially other peripheral membrane proteins. Depalmitoylating enzymes APT1 and APT2 are sep. conserved in all vertebrates, suggesting unique functional roles for each enzyme. The recent discovery of APT isoform-selective inhibitors ML348 and ML349 has opened new possibilities to probe the function of each enzyme, yet it remains unclear how each inhibitor achieves orthogonal inhibition. Here, the authors report the high-resolution structure of human APT2 in complex with ML349 (1.64 Å), as well as the complementary structure of human APT1 bound to ML348 (1.55 Å). Although the overall peptide backbone structures are nearly identical, each inhibitor adopted a distinct conformation within each active site. In APT1, ML348 was positioned above the catalytic triad, but in APT2, the sulfonyl group of ML349 formed H-bonds with active site resident water mols. to indirectly engage the catalytic triad and oxyanion hole. Reciprocal mutagenesis and activity profiling revealed several differing residues surrounding the active site that served as critical gatekeepers for isoform accessibility and dynamics. Structural and biochem. anal. suggested that the inhibitors occupy a putative acyl-binding region, establishing the mechanism for isoform-specific inhibition, hydrolysis of acyl substrates, and structural orthogonality important for future probe development.

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Application In Synthesis of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Determination of the dissociation constants of omeprazole and its intermediate by capillary electrophoresis. Author is Podobnik, B.; Jelen-Zmitek, A..

Capillary electrophoresis is the primary method for determining dissociation constants of compounds which have low solubility in H2O, which is often the case for pharmaceuticals. Potentiometric determination in these cases is difficult because of lowered sensitivity. A new method is based on measurement of ionic mobility as a function of the pH of the buffer used.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Pharmacokinetics of [14C]omeprazole in patients with impaired renal function.》. Authors are Naesdal, J; Andersson, T; Bodemar, G; Larsson, R; Regårdh, C G; Skånberg, I; Walan, A.The article about the compound:5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazolecas:73590-85-9,SMILESS:CC1=CN=C(CSC2=NC3=CC(OC)=CC=C3N2)C(C)=C1OC).Recommanded Product: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole. Through the article, more information about this compound (cas:73590-85-9) is conveyed.

Pharmacokinetics of [14C]omeprazole and its metabolites were studied after single intravenous and oral doses of 20 and 40 mg, respectively, to 12 patients with chronic renal insufficiency. Blood samples for determination of total radioactivity, omeprazole, OH-omeprazole, sulfone, and sulfide were taken for 24 hours. Urine was collected over 96 hours for determination of total radioactivity and during the first 24 hours for additional assay of omeprazole and metabolites. The mean systemic availability was 70%. The mean plasma t1/2 of omeprazole was 0.6 hours. Unchanged omeprazole was not measurable in urine. Derived pharmacokinetic constants of intact omeprazole were within the range of those reported in healthy individuals. The accumulated 24-hour excretion of radioactive metabolites was related significantly to creatinine clearance. The cumulative excretion of total radioactivity in urine over 96 hours in percent of given dose varied between 25% and 83%.

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Application of 73590-85-9. 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: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Development and validation of a precise single HPLC method for determination of omeprazole and its related compound in pharmaceutical formulation. Author is Trivedi, Harshal K.; Patel, Mukesh C..

A simple reversed-phase high performance liquid chromatog. was developed and employed for the determination of omeprazole and its related substances in bulk material and com. dosage forms. A gradient elution of filtered sample was performed on Zorbax XDB C8 (150 × 4.6), 5μ column with Glacine buffer (pH-8.8) as a mobile phase-A, Acetonitrile : Methanol (83:17) as a mobile phase-B and UV detection at 302 nm. Mobile phase was delivered at flow of 1.2 mL/min and at maintaining the column temperature at 25°C, quantification was achieved with reference to the external standards The active ingredient – omeprazole was successfully separated from its all related substances, including process impurities and other possible impurities of oxidation and decomposition The excipients did not interfere with the determination of omeprazole and its related compound in com. dosage formulations. The method was rapid, simple, accurate and reproducible. It was not only successfully employed for the assay of omeprazole in bulk material and pharmaceutical dosage forms but also for the determination of its related substances. A statistical design of experiments was used for the robustness evaluation of HPLC anal. method. All results were acceptable and confirmed that the method is suitable for its intended use.

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Recommanded Product: 4-(Piperazin-1-yl)phenol. 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-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Different nematic phases and a switchable SmCP phase formed by homologues of a new class of asymmetric bent-core mesogens.

Ten homologues of a class of asym. bent-shaped liquid crystal compounds were synthesized by reaction of 4-(4-alkyloxy-benzoyloxy)benzoyl chlorides with N-(4-hydroxyphenyl)piperazine. The mesophase structure and transitions of the compounds were studied by polarizing microscopy, x-ray diffraction, dielec. and electro-optical measurements. The long-chain members of the series C8-C16 exhibit the switchable polar antiferroelec. smectic phase ( SmCP). The short-chain members, C4-C8, form a nematic phase. The homologues C5 and C6 show a transition from nematic to a low-temperature phase which is indicated by a sharp peak in the DSC trace. Whereas the texture of the phase points to a nematic-smectic transition, the x-ray studies definitely prove a structure without any long range (or quasi long range) positional order in the low-temperature phase. A mol. model is described which exhibits structural features similar to those of a nematic phase, which can be regarded as the precursor of the following columnar phase (B1 phase).

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COA of Formula: C17H19N3O2S. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Role of CYP3A4 in the regulation of the aryl hydrocarbon receptor by omeprazole sulphide. Author is Gerbal-Chaloin, Sabine; Pichard-Garcia, Lydiane; Fabre, Jean-Michel; Sa-Cunha, Antonio; Poellinger, Lorenz; Maurel, Patrick; Daujat-Chavanieu, Martine.

Cross-talk between nuclear receptors involved in the control of drug metabolism is being increasingly recognized as a source of drug side effects. Omeprazole is a well known activator of the aryl hydrocarbon receptor (AhR). We investigated the regulation of AhR by omeprazole-sulfide, a degradation metabolite of omeprazole, using CYP1A mRNA induction, reporter gene assay, receptor DNA binding, ligand binding, nuclear translocation, trypsin digests, and drug metabolism anal. in mouse Hepa-1c1c7, human HepG2 cells and primary human hepatocytes. Omeprazole-sulfide is a pure antagonist of AhR in Hepa-1c1c7 and HepG2 hepatoma cell lines. In Hepa-1c1c7 cells, omeprazole-sulfide is a ligand of AhR, inhibits AhR activation to a DNA-binding form, induces a specific pattern of AhR trypsin digestion and inhibits AhR nuclear translocation and subsequent degradation in response to 2,3,7,8-tetrachlorodibenzo-p-dioxin. However, in highly differentiated primary human hepatocytes treated with rifampicin an agonist of the pregnane X receptor (PXR), omeprazole-sulfide behaves as an agonist of AhR. Inhibition of drug metabolizing enzymes by ketoconazole restores the antagonist effect of omeprazole-sulfide. Metabolic LC/MS anal. reveals that omeprazole-sulfide (AhR antagonist) is efficiently converted to omeprazole (AhR activator) by cytochrome P 450 CYP3A4, a target gene of PXR, in primary human hepatocytes but not in hepatoma cells in which PXR is not expressed. This report provides the first evidence for a cross-talk between PXR/CYP3A4 and AhR. In addition, it clearly shows that conclusions drawn from experiments carried out in cell lines may lead to erroneous in vivo predictions in man.

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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 Asymmetric synthesis of esomeprazole, published in 2000-09-22, which mentions a compound: 73590-85-9, mainly applied to esomeprazole asym synthesis, Safety of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole.

A highly efficient synthesis of esomeprazole – the (S)-enantiomer of omeprazole – via asym. oxidation of prochiral sulfide I is described. The asym. oxidation was achieved by titanium-mediated oxidation with cumene hydroperoxide (CHP) in the presence of (S,S)-diethyl tartrate [(S,S)-DET]. The enantioselectivity was provided by preparing the titanium complex in the presence of I at an elevated temperature and/or during a prolonged preparation time and by performing the oxidation of I in the presence of an amine. An enantioselectivity of >94% ee was obtained using this method.

Compound(73590-85-9)Safety of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole), if you are interested, you can check out my other related articles.

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Application of 56621-48-8. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Discovery of small molecules that inhibit melanogenesis via regulation of tyrosinase expression. Author is Song, Jiho; Lee, Hyun-e; Kim, Young Jin; Kim, Su Yeon; Kim, Dong-Seok; Min, Kyung Hoon.

5,6,7,8-Tetrahydro-4H-cyclohepta[d]isoxazole derivatives were synthesized and evaluated as a novel class of inhibitors for α-MSH (α-MSH) induced melanogenesis in a mouse melanoma B16F10 cell line. Three of the compounds (IC50 = 0.67 μM), (IC50 = 1.01 μM) and (IC50 = 0.99 μM) exhibited a potent inhibitory activity approx. 85- to 126-fold greater than kojic acid, a well-known potent inhibitor. A biochem. study indicates that the activity of this series should be displayed via down-regulation of the expression of tyrosinase.

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