Category: ethers-buliding-blocks

Application In Synthesis of 4-(Piperazin-1-yl)phenol. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Novel N,S- and S,S-substituted dienes synthesized from mercapto triazole and some amine derivatives. Author is Ibis, Cemil; Aydinli, Goeksin.

2-Nitro diene Cl2C:CClC(NO2):CCl2 reacted with 3-mercapto-1,2,4-triazole (I) and cyclohexanethiol to yield the resp. dithioacetals Cl2C:CClC(NO2):C(SR)R1 (II; R = 1,2,4-triazol-3-yl, cyclohexyl; R1 = SR). Dithioacetals II (R = 1,2,4-triazol-3-yl; R1 = octylthio, decylthio, hexdecylthio, cyclohexylthio) were obtained by reactions of appropriate vinyl sulfides with I. Novel N,S-substituted dienes were obtained by treatment of II [R = decyl, R1 = Cl (III)] with piperazines. Compound III was reacted with N-(2-aminoethyl)morpholine to give the corresponding N,S-substituted diene. Compound III gave a new N-butadienylhomopiperazine on reaction with homopiperazine in CH2Cl2. Compound II (R = cyclohexyl, R1 = cyclohexylthio) was characterized by single-crystal x-ray diffraction [monoclinic, space group P21/n, a 12.0862(12), b 11.1625(8), c 16.337(1) Å, β 110.840(4)°, V 2059.9(3) Å3, Z 4].

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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.Lindberg, Per; Nordberg, Peter; Alminger, Tomas; Braendstroem, Arne; Wallmark, Bjoern researched the compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole( cas:73590-85-9 ).Application of 73590-85-9.They published the article 《The mechanism of action of the antisecretory agent omeprazole》 about this compound( cas:73590-85-9 ) in Journal of Medicinal Chemistry. Keywords: omeprazole active metabolite acid decomposition product; sulfenamide omeprazole active metabolite; stomach acid secretion omeprazole. We’ll tell you more about this compound (cas:73590-85-9).

The very potent gastric antisecretory agent omeprazole (I) [73590-58-6], presently under clin. evaluation, has been shown to act via inhibition of the gastric H+, K+-ATPase, the enzyme responsible for pumping of protons into the stomach. I needs acid activation to become an active inhibitor. A tetracyclic sulfenamide (II) was isolated from the acid decomposition of I. This sulfenamide, or, alternatively, the corresponding sulfenic acid, an unstable, probable intermediate in the sulfenamide formation, is the active inhibitor formed in vivo from omeprazole.

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COA of Formula: C17H19N3O2S. 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 Stability-indicating methods for determining omeprazole and octylonium bromide in the presence of their degradation products. Author is El-Kousy, Naglaa M.; Bebawy, Lories I..

Four stability-indicating assays were developed for determining omeprazole and octylonium bromide. Omeprazole was photodegraded and determined in the presence of its degradation products omeprazole sulfenimide and benzimidazole sulfide by 2 methods. The first method depends on use of first-, second-, and third-derivative spectrophotometry at 290.4, 320.6, and 311.6 nm, resp. The second method was based on applying the charge-transfer technique with chloranil as π acceptor to form a complex with omeprazole, the absorbance of which is measured at 377 nm. These methods determined omeprazole in concentration ranges of 5-20 μg/mL by first-, second-, and third-derivative spectrophotometry and 10-50 μg/mL by charge-transfer complexation with mean accuracies of 99.92, 99.71, 99.64, and 100.24%, resp. Octylonium bromide was determined by a TLC-densitometric method using in the presence of its degradation products p-[2-(n-octyoxy)benzoyl]aminobenzoic acid and diethyl-(2-hydroxyethyl)methylammonium bromide without any interferences. Alternatively, octylonium bromide was evaluated by a colorimetric method using the acid dye Rose Bengal. The ion pair formed was extracted in chloroform at pH 4, and its absorbance was measured at 562 nm. These methods determine octylonium bromide in the presence of its degradation products in concentration ranges of 0.1-0.5 μg/μL by densitometry and 4.5-22.5 μg/mL by colorimetry, with mean accuracies of 100.21 and 99.73%, resp. The suggested methods were used to determine drugs in bulk powder, laboratory-prepared mixtures, and pharmaceutical dosage forms. Results were compared statistically with those obtained with reference methods.

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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, European Journal of Organic Chemistry called gem-Bisphosphonate-Ended Group Dendrimers: Design and Gadolinium Complexing Properties, Author is Franc, Gregory; Turrin, Cedric-Olivier; Cavero, Emma; Costes, Jean-Pierre; Duhayon, Carine; Caminade, Anne-Marie; Majoral, Jean-Pierre, which mentions a compound: 56621-48-8, SMILESS is OC1=CC=C(N2CCNCC2)C=C1, Molecular C10H14N2O, Category: ethers-buliding-blocks.

The synthesis of the first gem-bisphosphonate-ended group dendrimers is described using nucleophilic substitution of terminal P(S)Cl2 units of phosphorus dendrimers of generation 1 to 3 with protected aminophenols followed by deprotection of amino groups and Michael addition with vinylidene tetraisopropyl bisphosphonate. These dendrimers were found to act as chelating agents towards Gd ions. Contrary to the phosphonic acids that can introduce bridges between Gd ions, these synthons act as unique chelating agents toward the Gd ions. Furthermore, it appears that the number of Gd ions introduced in the isolated units is equal to the number of gem-bisphosphonate pairs. Eventually, the magnetic measurements demonstrate clearly that the Gd ions are not coordinated to these pairs as isolated ions but that at least some of these ions are bridged through oxygen atoms that are not P=O functions, as shown by the structural determination given in the paper. Studies concerning properties of these Gd dendrimers complexes are under active study. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009).

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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 Mechanism of the asymmetric sulfoxidation in the esomeprazole process: effects of the imidazole backbone for the enantioselection, published in 2009-04-30, which mentions a compound: 73590-85-9, mainly applied to mechanism asym sulfoxidation esomeprazole process effect imidazole backbone enantioselection, Computed Properties of C17H19N3O2S.

The asym. sulfoxidation reaction of imidazole-based prochiral sulfides was studied to explore the mechanistic details of the highly efficient esomeprazole process, which is one of the few industrial scale catalytic asym. procedures. The synthetic studies revealed that the smallest subunit governing the selectivity in the esomeprazole process is an imidazole ring. Thus, by using the esomeprazole procedure Me imidazole sulfide could be oxidized as efficiently as its several functionalized derivatives, including pyrmetazol. However, alkylation of the imidazole nitrogen led to a major drop of the enantioselectivity. Our atm. pressure chem. ionization-mass spectrometry (APCI/MS) studies indicate that addition of small amounts of water to the reaction mixture facilitates the formation of mononuclear titanium species, which are the active catalytic intermediates of the selective oxidation reaction. One of the most important features of the esomeprazole procedure is that amine additives increase the enantioselectivity of the oxidation process. The NMR studies of the presumed reaction intermediates show that under catalytic conditions the amines are able to coordinate to titanium and dissociate the coordinated imidazole substrate. The d. functional theory (DFT) modeling studies provided new insights in the mechanism of the asym. induction. It was found that the oxidation requires a lower activation energy if the imidazole sulfide precursor does not coordinate to titanium. Two possible reaction paths were explored for this out of sphere oxidation mechanism. The most important interaction governing the enantioselection is hydrogen bonding between the N-H of the imidazole ring and the chiral tartrate ligand on titanium. Furthermore, the oxidation reaction imposes an important structural constraint to the TS structure involving a linear arrangement of the peroxide oxygens and the sulfur atom. This constraint and the N coordination of imidazole leads to a very strained structure for the inner sphere mechanism of the oxidation, which leads to a much higher activation barrier than the corresponding out of sphere process, and therefore it is unlikely.

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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Solubility of Omeprazole Sulfide in Different Solvents at the Range of 280.35-319.65 K.Category: ethers-buliding-blocks.

Solubility data were measured for omeprazole sulfide in ethanol, 95 mass-% ethanol, Et acetate, isopropanol, methanol, acetone, n-butanol and n-propanol in the temperature range from 280.35 to 319.65 K by employing the gravimetric method. The solubilities increase with temperature and they are in good agreement with the calculated solubility of the modified Apelblat equation and the λh equation. The exptl. solubility and correlation equation in this work can be used as essential data and model in the purification process of omeprazole sulfide. The thermodn. properties of the solution process, including the Gibbs energy, enthalpy, and entropy were calculated using the van’t Hoff equation.

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Ether – Wikipedia,
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Application of 73590-85-9. 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 Stability-indicating methods for determining omeprazole and octylonium bromide in the presence of their degradation products. Author is El-Kousy, Naglaa M.; Bebawy, Lories I..

Four stability-indicating assays were developed for determining omeprazole and octylonium bromide. Omeprazole was photodegraded and determined in the presence of its degradation products omeprazole sulfenimide and benzimidazole sulfide by 2 methods. The first method depends on use of first-, second-, and third-derivative spectrophotometry at 290.4, 320.6, and 311.6 nm, resp. The second method was based on applying the charge-transfer technique with chloranil as π acceptor to form a complex with omeprazole, the absorbance of which is measured at 377 nm. These methods determined omeprazole in concentration ranges of 5-20 μg/mL by first-, second-, and third-derivative spectrophotometry and 10-50 μg/mL by charge-transfer complexation with mean accuracies of 99.92, 99.71, 99.64, and 100.24%, resp. Octylonium bromide was determined by a TLC-densitometric method using in the presence of its degradation products p-[2-(n-octyoxy)benzoyl]aminobenzoic acid and diethyl-(2-hydroxyethyl)methylammonium bromide without any interferences. Alternatively, octylonium bromide was evaluated by a colorimetric method using the acid dye Rose Bengal. The ion pair formed was extracted in chloroform at pH 4, and its absorbance was measured at 562 nm. These methods determine octylonium bromide in the presence of its degradation products in concentration ranges of 0.1-0.5 μg/μL by densitometry and 4.5-22.5 μg/mL by colorimetry, with mean accuracies of 100.21 and 99.73%, resp. The suggested methods were used to determine drugs in bulk powder, laboratory-prepared mixtures, and pharmaceutical dosage forms. Results were compared statistically with those obtained with reference methods.

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Ether – Wikipedia,
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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 Catalytic asymmetric oxidation of 1H-benzimidazolyl pyridinylmethyl sulfides with cumene hydroperoxide catalyzed by a titanium complex with (S,S)-N,N’-dibenzyl tartramide ligand. Author is Che, Guoyong; Xiang, Jing; Tian, Tian; Huang, Qingfei; Cun, Linfeng; Liao, Jian; Wang, Qiwei; Zhu, Jin; Deng, Jingen.

A chiral titanium complex, formed in situ from Ti(Oi-Pr)4, (S,S)-N,N’-dibenzyl tartramide, and water was found to serve as an efficient catalyst for the asym. oxidations of 1H-benzimidazolyl pyridinylmethyl sulfides with cumene hydroperoxide (CHP) in the absence of a base. Several proton pump inhibitors (PPIs), such as esomeprazole, lansoprazole, rabeprazole, and pantoprazole were obtained in high yield (up to 92%) and excellent enantiomeric excess (up to 96%).

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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 Design, synthesis and biological evaluation of novel pleuromutilin derivatives possessing acetamine phenyl linker, published in 2019-11-01, which mentions a compound: 56621-48-8, mainly applied to acetamine phenyl pleuromutilin preparation antibacterial pharmacokinetic; Antibiotics; In vivo; MRSA; Pleuromutilin; Synthesis, HPLC of Formula: 56621-48-8.

A series of novel acetamine Ph pleuromutilin derivatives incorporating 2-aminothiophenol moieties into the C14 side chain were synthesized via acylation reactions under mild conditions. The in vitro antibacterial activities of the synthesized derivatives against three Staphylococcus aureus (MRSA ATCC 43300, ATCC 29213 and AD 3) and two Escherichia coli (ATCC 25922 and 9-1) were evaluated by the broth dilution method. Most of the synthesized derivatives displayed potent activities. Compound I was found to be the most active antibacterial derivative against MRSA (minimal inhibitory concentration = 0.015 μg/mL) which may lead to a promising antibacterial drug. Furthermore, compound I displayed more rapid bactericidal kinetic than tiamulin in in vitro time-kill studies and possessed a longer PAE than tiamulin against MRSA. The PK properties of compound I were then measured. The half life (t1/2), clearance rate (Cl) and the area under the plasma concentration-time curve (AUC0→∞) of compound I were 6.88 h, 21.64 L/h/kg and 0.48 μg h/mL, resp. The in vivo antibacterial activities of compound I against MRSA were further evaluated using thigh infection model and systemic infection model. Compound I possessed superior antibacterial efficacy to tiamulin against MRSA infection in both model.

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Synthetic Route of C10H14N2O. 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 Design, synthesis and antibacterial evaluation of novel pleuromutilin derivatives possessing piperazine linker.

A series of pleuromutilin derivatives bearing piperazine ring have been reported. The in vitro antibacterial activities of the synthetic derivatives against MRSA (ATCC 43300), Staphylococcus aureus (ATCC 29213), Enterococcus faecalis (ATCC 29212), Enterococcus faecium (ATCC35667) and Escherichia coli (ATCC25922) were evaluated by the broth dilution method. Most of the synthesized derivatives displayed potent activities. Compounds 11c, 12a and 12c were found to be the most active antibacterial derivatives against MRSA (min. inhibitory concentration = 0.015 μg/mL). The binding of compounds 11c, 12a and 12c (I – III, resp.) to the 50s ribosome were investigated by mol. modeling. Compound 11c possessed lower binding free energy compared with compounds 12a and 12c. Compound 11c was further evaluated in MRSA systemic infection model and displayed superior in vivo efficacy to that of tiamulin.

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