Category: ethers-buliding-blocks

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Validation of an automated liquid chromatographic method for omeprazole in human plasma using on-line solid-phase extraction.》. Authors are García-Encina, G; Farrán, R; Puig, S; Martínez, L.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).Synthetic Route of C17H19N3O2S. Through the article, more information about this compound (cas:73590-85-9) is conveyed.

An automated system using on-line solid-phase extraction and HPLC with UV detection has been validated in order to determine omeprazole in human plasma. The extraction was carried out using C18 cartridges. After washing, omeprazole was eluted from the cartridge with mobile phase onto an Inertsil ODS-2 column. The developed method was selective and linear for drug concentrations ranging between 5 and 500 ng ml(-1). The recovery of omeprazole ranged from 88.1 to 101.5%, and the limit of quantitation (LOQ) was 5 ng ml(-1). The intraday accuracy ranged from 93.1 to 106.2% and the interday accuracy varied from 95.4 to 105.1%. For the LOQ, good values of precision (8.7 and 17.5% for intraday and interday, respectively) were also obtained. This automated system has been applied to determine omeprazole in human plasma samples from bioequivalence studies.

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Biotransformation of LASSBio-579 and pharmacological evaluation of p-hydroxylated metabolite a N-phenylpiperazine antipsychotic lead compound》. Authors are Gomes, Tatiana F.; Pompeu, Thais E. T.; Rodrigues, Daniel A.; Noel, Francois; Menegatti, Ricardo; Andrade, Carolina H.; Sabino, Jose R.; Gil, Eric S.; Dalla Costa, Teresa; Betti, Andresa H.; Antonio, Camila B.; Rates, Stela M. K.; Fraga, Carlos A. M.; Barreiro, Eliezer J.; de Oliveira, Valeria.The article about the compound:4-(Piperazin-1-yl)phenolcas:56621-48-8,SMILESS:OC1=CC=C(N2CCNCC2)C=C1).Product Details of 56621-48-8. Through the article, more information about this compound (cas:56621-48-8) is conveyed.

Using a combination of docking and mol. dynamics simulations, we predicted that p-hydroxylation by CYP1A2 would be the main metabolic pathway for the 1-[1-(4-chlorophenyl)-1H-4pyrazolylmethyl] phenylhexahydropiperazine, LASSBio-579. As the result of a screening process with strains of filamentous fungi, Cunninghamella echinulata ATCC 9244 was chosen to scale up the preparation of the p-hydroxylated metabolite. About 30 min after i.p. administration of LASSBio-579 to rats was identified as the p-hydroxylated metabolite, confirming our in silico previsions. Chem. synthesis of the metabolite was performed and allowed its pharmacol. evaluation in binding assays revealing its high affinity for D2 and D4 receptors, indicating that this metabolite should participate to the antipsychotic effect of LASSBio-579 in vivo. Furthermore, we report here that both LASSBio-579 and its p-hydroxylated metabolite have a much lower affinity than clozapine for two receptors involved in adverse reactions. Voltammetric assays were useful to understand the redox profile of LASSBio-579.

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Ether – Wikipedia,
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Related Products 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 Simultaneous determination of omeprazole and their main metabolites in human urine samples by capillary electrophoresis using electrospray ionization-mass spectrometry detection.

The authors report a novel method for the simultaneous determination of omeprazole and their main metabolites (omeprazole sulfide, omeprazole sulfone and 5-hydroxy omeprazole) in human urine samples. For this purpose, two new capillary electrophoresis (CE) methods were developed for the simultaneous determination of target compounds, using initially diode-array for optical detection and electrospray ionization-mass spectrometry (ESI-MS) for metabolites identification and identity confirmation. A new metabolite (5-hydroxysulfide omeprazole) was identified by electrospray ionization multi-stage mass spectrometry (ESI-MS2) fragment which was then used to support the proposed chem. structure. Pharmacokinetic results using CE method were compared with those obtained when a HPLC method was used. Equivalent pharmacokinetics profiles resulted when any anal. methods were carried out.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Catalytic Asymmetric Synthesis of Esomeprazole by a Titanium Complex with a Hexa-aza-triphenolic Macrocycle Ligand》. Authors are Song, Weiguo; Dong, Liangjun; Zhou, Yuhan; Fu, Yongqiang; Xu, Wenfang.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).Category: ethers-buliding-blocks. Through the article, more information about this compound (cas:73590-85-9) is conveyed.

An efficient synthesis of esomeprazole I via catalytic asym. oxidation of 1H-benzimidazolyl pyridinylmethyl sulfide by a titanium complex with a hexa-aza-triphenolic macrocycle ligand is described. Esomeprazole was prepared with 99.6% ee, which meets the high requirement of the European Pharmacopeia on enantiomeric purity.

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Ether – Wikipedia,
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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole(SMILESS: CC1=CN=C(CSC2=NC3=CC(OC)=CC=C3N2)C(C)=C1OC,cas:73590-85-9) is researched.Formula: C6H4O3. The article 《Mechanism of the asymmetric sulfoxidation in the esomeprazole process: effects of the imidazole backbone for the enantioselection》 in relation to this compound, is published in Advanced Synthesis & Catalysis. Let’s take a look at the latest research on this compound (cas:73590-85-9).

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.

There is still a lot of research devoted to this compound(SMILES：CC1=CN=C(CSC2=NC3=CC(OC)=CC=C3N2)C(C)=C1OC)Electric Literature of C17H19N3O2S, and with the development of science, more effects of this compound(73590-85-9) can be discovered.

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Ether – Wikipedia,
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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, European Journal of Medicinal Chemistry called Design, synthesis and antibacterial evaluation of novel pleuromutilin derivatives possessing piperazine linker, Author is Gao, Mei-Ling; Zeng, Jie; Fang, Xi; Luo, Jian; Jin, Zhen; Liu, Ya-Hong; Tang, You-Zhi, which mentions a compound: 56621-48-8, SMILESS is OC1=CC=C(N2CCNCC2)C=C1, Molecular C10H14N2O, Related Products of 56621-48-8.

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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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Application In Synthesis of 4-(Piperazin-1-yl)phenol. 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: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about A novel class of ethacrynic acid derivatives as promising drug-like potent generation of anticancer agents with established mechanism of action. Author is Mignani, Serge; El Brahmi, Nabil; El Kazzouli, Said; Eloy, Laure; Courilleau, Delphine; Caron, Joachim; Bousmina, Mosto M.; Caminade, Anne-Marie; Cresteil, Thierry; Majoral, Jean-Pierre.

The well-known diuretic Ethacrynic acid (EA, Edecrin), showing low anti-proliferative activities, was chem. modified at different positions. The new EA derivatives have been tested in vitro in anti-proliferative assays on both tumor KB (epidermal carcinoma) and leukemia HL60 (promyelocytic) cells suitable targets for anticancer activity. Reduction of the α-β double bond of EA completely abolished anti-cancer activities, whereas introduction of either 2-(4-substituted phenyl)ethanamine (series A) or 4-(4-substituted phenyl)piperazine (series B) moieties generated compounds showing moderate to strong anti-proliferative activities against human cancer cell lines. Several substitutions on the Ph of these two moieties are tolerated. The mechanism of action of the EA derivatives prepared in this study is more complex than the inhibition of glutathione S-transferase π ascribed as unique effect to EA and might help to overcome tumor resistances.

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

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: 56621-48-8, is researched, SMILESS is OC1=CC=C(N2CCNCC2)C=C1, Molecular C10H14N2OJournal, Article, Bioorganic & Medicinal Chemistry Letters called Potent, selective, and orally active adenosine A2A receptor antagonists: Arylpiperazine derivatives of pyrazolo[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines, Author is Neustadt, Bernard R.; Hao, Jinsong; Lindo, Neil; Greenlee, William J.; Stamford, Andrew W.; Tulshian, Deen; Ongini, Ennio; Hunter, John; Monopoli, Angela; Bertorelli, Rosalia; Foster, Carolyn; Arik, Leyla; Lachowicz, Jean; Ng, Kwokei; Feng, Kung-I., the main research direction is pyrazolo triazolo pyrimidine arylpiperazine preparation adenosine receptor antagonist SAR.COA of Formula: C10H14N2O.

Antagonism of the adenosine A2A receptor offers great promise in the treatment of Parkinson’s disease. Employing the known pyrazolo[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidine A2A antagonist SCH 58261 as a starting point, we identified the potent and selective (vs. A1) antagonist 11h (I), orally active in the rat haloperidol-induced catalepsy model. We further optimized this lead to the methoxyethoxyethyl ether 12a (SCH 420814), which shows broad selectivity, good pharmacokinetic properties, and excellent in vivo activity.

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Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

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: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Acaricidal properties of piperazine and its derivatives against house-dust and stored-food mites.COA of Formula: C10H14N2O.

Piperazine derivatives possess pharmacol. properties, yet the acaricidal activity of these compounds has not been investigated. This study was conducted to evaluate the color alteration and acaricidal activity of piperazine derivatives against Dermatophagoides spp. and Tyrophagus putrescentiae using filter paper and fumigant methods. In a fumigant bioassay, 1-phenylpiperazine (7.83 μg/cm2) against D. farinae was found to be 4.7-fold more toxic than DEET (36.84 μg/cm2), followed by benzyl benzoate (9.72 μg/cm2), piperazine (11.41 μg/cm2), 1-ethoxycarbonylpiperazine (20.14 μg/cm2), and 1-(2-methoxyphenyl)piperazine (22.14 μg/cm2). In a filter paper bioassay, 1-(2-methoxyphenyl)piperazine (3.65 μg/cm2) was 5.7-fold more toxic than DEET (20.64 μg/cm2), followed by 1-ethoxycarbonylpiperazine (4.02 μg/cm2), 1-phenylpiperazine (4.75 μg/cm2), benzyl benzoate (7.83 μg/cm2), and piperazine (10.59 μg/cm2). Similar results have been exhibited with piperazine derivatives against D. pteronyssinus. However, no activity against T. putrescentiae was observed for piperazine derivatives, except for piperazine. These results indicate that piperazine derivatives may be suitable as vapor-phase acaricide fumigants owing to their high volatility, acaricidal activity and safety. 1-Phenylpiperazine was found to be an excellent mite indicator based on the color change it induced. Taken together, these findings indicate that piperazine derivatives may be used to replace existing problematical acaricides owing to their activity and ability to act as a mite indicator.

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Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

COA of Formula: C17H19N3O2S. 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: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Synthesis of optically active omeprazole by catalysis with vanadyl complexes with chiral Schiff bases. Author is Koneva, E. A.; Khomenko, T. M.; Kurbakova, S. Yu.; Komarova, N. I.; Korchagina, D. V.; Volcho, K. P.; Salakhutdinov, N. F.; Tolstikov, A. G.; Tolstikov, G. A..

A new method for the preparation of optically active omeprazole I via asym. oxidation of the corresponding sulfide with the use of vanadyl complexes with chiral Schiff bases as the catalysts has been elaborated. The best yields and enantioselectivity of the oxidation were achieved using the complex of VO(acac)2 with ligand II.

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Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem