Category: 73590-85-9

Name: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole. 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 Effect of hypoxia on oxidative and reductive pathways of omeprazole metabolism by the isolated perfused rat liver. Author is Webster, Lorraine K.; Jones, D. Brian; Mihaly, George W.; Morgan, Denis J.; Smallwood, Richard A..

The effect of hypoxia on the elimination of H168-68 (omeprazole)(I) [73590-58-6] a potent inhibitor of gastric acid secretion, was studied in the isolated perfused rat liver. During normal oxygenation, a 10 mg bolus dose was eliminated rapidly (half-life (T1/2)-β = 8.0 min), while under hypoxic conditions T1/2β was increased to 81.6 min. Upon reoxygenation, T1/2β returned to 9.6 min. During hypoxia, perfusate concentrations of an oxidative metabolite (I-sulfone [88546-55-8]) were reduced by 68%, while those of the reductively-generated I-sulfide [73590-85-9] increased 4-fold. With reoxygenation, both formation and elimination of the sulfone were increased, whereas, which had accumulated during the hypoxic period, was eliminated rapidly. These findings were duplicated in steady-state experiments, in which omeprazole clearance during hypoxia fell by at least 70%, and sulfide concentrations in perfusate rose from undetectable levels to 200 ng/mL (at least a 10-fold increase). Sulfone concentrations did not change with hypoxia, consistent with a reduction in both its formation and elimination rates. Thus, the hepatic elimination of omeprazole is severely retarded by hypoxia, but this effect is promptly reversed by reoxygenation. The increased formation of the reductive metabolite during hypoxia is not of sufficient magnitude to sustain the normal hepatic elimination of omeprazole.

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Seshadri, Raja Kumar; Raghavaraju, Thummala Veera; Chakravarthy, Ivon Elisha published the article 《A single gradient stability-indicating reversed-phase LC method for the estimation of impurities in omeprazole and domperidone capsules》. Keywords: omeprazole domperidone impurity determination RP HPLC capsule degradation; Domperidone; Forced Degradation; Method validation; Omeprazole; RP-LC.They researched the compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole( cas:73590-85-9 ).Computed Properties of C17H19N3O2S. 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:73590-85-9) here.

A gradient reversed-phase liquid chromatog. (RP-LC) method was developed for the quant. estimation of impurities in the pharmaceutical dosage form of Omeprazole and Domperidone capsules. The developed method is a stability-indicating test method for the estimation of impurities generated during the formulation and storage of Omeprazole and Domperidone capsules. The chromatog. separation was achieved on a column packed with octadecyl silane, having a column length of 250 mm and diameter of 4.6 mm with a particle size of 5 μm, and by following a gradient program using a combination of a monobasic potassium phosphate buffer (0.05M) and acetonitrile. Since the spectral properties were similar, both compounds’ individual impurities were estimated at 285 nm. Forced degradation studies were performed on Omeprazole pellets (enteric coated) and Domperidone pellets (SR coated) encapsulated in size “”1″” hard gelatin capsules. Omeprazole and Domperidone were degraded using acid hydrolysis (0.1 N hydrochloric acid), base (0.1 N sodium hydroxide), oxidation (50% hydrogen peroxide), heat (105 °C), and UV light (254 nm). The established method was validated and found to be linear, accurate, precise, specific, robust, and rugged.

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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, Journal of Chromatography, Biomedical Applications called Determination of omeprazole and metabolites in plasma and urine by liquid chromatography, Author is Lagerstroem, Per Olof; Persson, Bengt Arne, which mentions a compound: 73590-85-9, SMILESS is CC1=CN=C(CSC2=NC3=CC(OC)=CC=C3N2)C(C)=C1OC, Molecular C17H19N3O2S, Safety of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole.

Omeprazole (I) [73590-58-6], a substituted benzimidazole and a new gastric acid inhibitor, was determined in plasma and urine, together with 3 of its metabolites: the sulfide [73590-85-9], the sulfone [88546-55-8] and the hydroxy compound [92340-57-3]. The methods comprised extraction from the biol. materials with CH2Cl2, followed either by direct injection of the extract onto a normal-phase liquid chromatog. column or evaporation, dissolution, and injection onto a reversed-phase system. The compounds were detected by UV spectrometry. The absolute recoveries obtained were mostly >95%. The min. determinable concentration of omeprazole was 20 nmol/L plasma (relative standard deviation 10-15%) and 50 nmol/L in urine. The metabolites could also be determined at the same levels.

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Reference of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole. 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: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Omeprazole determination using HPLC with coulometric detection.

A sensitive high performance liquid chromatog. (HPLC) method for the determination of omeprazole and three related benzimidazoles is reported. Coulometric detection was carried out at +800 mV using a porous carbon electrode. The linear range is 0.01-10 μg/mL. The method has a high degree of precision; the relative standard deviation of omeprazole at a concentration of 1.06 μg/mL was 0.7% (n=4). The cyclic voltammogram of omeprazole is consistent with the hydrodynamic voltammogram exhibiting a single major irreversible oxidative wave with a peak potential at +1105 mV. The response factors for the four compounds are similar indicating that the oxidative process does not involve the sulfur moiety exclusively. The data are most consistent with oxidation primarily of the benzimidazole groups. The method was applied successfully to the determination of omeprazole in a paste formulation.

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Synthetic Route of 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 An efficient asymmetric approach to the R-enantiomer impurity of esomeprazole. Author is Zhou, Guobin; Guan, Yueqing.

The R-enantiomer of esomeprazole (5-methoxy-2-[(4-methoxy-3, 5-dimethyl-2-pyridinylmethyl)sulfinyl]-1H-benzimidazole) was synthesized with high enantioselectivity by asym. oxidation of prochiral sulfide using the oxaziridinium salt. This (R)-enantiomer, useful as a reference for the quality control of esomeprazole was characterized by 1H and 13CNMR, IR and HRMS. The enantiomeric excess was determined by HPLC.

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Product Details of 73590-85-9. 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: 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.

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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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: 73590-85-9, is researched, SMILESS is CC1=CN=C(CSC2=NC3=CC(OC)=CC=C3N2)C(C)=C1OC, Molecular C17H19N3O2SJournal, Tetrahedron: Asymmetry called Asymmetric synthesis of esomeprazole, Author is Cotton, H.; Elebring, T.; Larsson, M.; Li, L.; Sorensen, H.; von Unge, S., the main research direction is esomeprazole asym synthesis.Formula: C17H19N3O2S.

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.

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Reference of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single 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 Omeprazole determination using HPLC with coulometric detection. Author is Sluggett, G. W.; Stong, J. D.; Adams, J. H.; Zhao, Z..

A sensitive high performance liquid chromatog. (HPLC) method for the determination of omeprazole and three related benzimidazoles is reported. Coulometric detection was carried out at +800 mV using a porous carbon electrode. The linear range is 0.01-10 μg/mL. The method has a high degree of precision; the relative standard deviation of omeprazole at a concentration of 1.06 μg/mL was 0.7% (n=4). The cyclic voltammogram of omeprazole is consistent with the hydrodynamic voltammogram exhibiting a single major irreversible oxidative wave with a peak potential at +1105 mV. The response factors for the four compounds are similar indicating that the oxidative process does not involve the sulfur moiety exclusively. The data are most consistent with oxidation primarily of the benzimidazole groups. The method was applied successfully to the determination of omeprazole in a paste formulation.

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Oelschlager, H.; Seeling, A.; Seeling, B.; Westesen, K.; Bunjes, H. published an article about the compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole( cas:73590-85-9,SMILESS:CC1=CN=C(CSC2=NC3=CC(OC)=CC=C3N2)C(C)=C1OC ).Electric Literature of C17H19N3O2S. 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:73590-85-9) through the article.

5-Methoxy-2-[(3,5-dimethyl-4-methoxy-2-pyridyl)methylthio]-1-H-benzimidazole was oxidized with Oxone in diluted EtOH at -5° furnishing omeprazole with an excellent yield. Addnl., decomposition kinetics of omeprazole in aqueous EtOH are presented.

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Related Products of 73590-85-9. 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 Disposition of the anti-ulcer medications ranitidine, cimetidine, and omeprazole following administration of multiple doses to exercised Thoroughbred horses. Author is Knych, H. K.; Stanley, S. D.; Arthur, R. M.; McKemie, D. S..

The use of anti-ulcer medications, such as cimetidine, ranitidine, and omeprazole, is common in performance horses. The use of these drugs is regulated in performance horses, and as such a withdrawal time is necessary prior to competition to avoid a medication violation. To the authors’ knowledge, there are no reports in the literature describing repeated oral administrations of these drugs in the horse to determine a regulatory threshold and related withdrawal time recommendations. Therefore, the objective of the current study was to describe the disposition and elimination pharmacokinetics of these anti-ulcer medications following oral administration to provide data upon which appropriate regulatory recommendations can be established. Nine exercised Thoroughbred horses were administered 20 mg/kg BID of cimetidine or 8 mg/kg BID of ranitidine, both for seven doses or 2.28 g of omeprazole SID for four doses. Blood samples were collected, serum drug concentrations were determined, and elimination pharmacokinetic parameters were calculated The serum elimination half-life was 7.05 ± 1.02, 7.43 ± 0.851 and 3.94 ± 1.04 h for cimetidine, ranitidine, and omeprazole, resp. Serum cimetidine and ranitidine concentrations were above the LOQ and omeprazole and omeprazole sulfide below the LOQ in all horses studied upon termination of sample collection.

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Ether – Wikipedia,
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