Month: April 2022

Name: 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 Synthesis of novel WAY 100635 derivatives containing a norbornene group and radiofluorination of [18F]AH1.MZ as a serotonin 5-HT1A receptor antagonist for molecular imaging.

5-HT1A receptors are involved in a variety of psychiatric disorders and in vivo mol. imaging of the 5-HT1A status represents an important approach to analyze and treat these disorders. We report herein the synthesis of three new fluoroethylated 5-HT1A ligands (AH1.MZ, AH2.MZ and AH3.MZ) as arylpiperazine derivatives containing a norbornene group. AH1.MZ (Ki = 4.2 nM) and AH2.MZ (Ki = 30 nM) showed reasonable in vitro affinities to the 5-HT1A receptor, whereas AH3.MZ appeared to be non-affine toward the 5-HT1A receptor. The receptor profile of AH1.MZ and AH2.MZ showed selectivity within the 5-HT system. 18F-labeling via [18F]FETos to [18F]AH1.MZ was carried out in radiochem. yields of > 70%. The final formulation of injectable solutions including [18F]FETos synthon synthesis, radiosynthesis and semipreparative high-performance liquid chromatog. (HPLC) separation took no longer than 130 min and provided [18F]AH1.MZ with a purity of >98% as indicated by anal. HPLC analyses.

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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 《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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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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Ether – Wikipedia,
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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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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,
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Li, Bing-Yu; Voets, Lauren; Van Lommel, Ruben; Hoppenbrouwers, Fien; Alonso, Mercedes; Verhelst, Steven H. L.; De Borggraeve, Wim M.; Demaerel, Joachim published the article 《SuFEx-enabled, chemoselective synthesis of triflates, triflamides and triflimidates》. Keywords: triflate triflamide triflimidate synthesis click reaction.They researched the compound: 4-(Piperazin-1-yl)phenol( cas:56621-48-8 ).Reference of 4-(Piperazin-1-yl)phenol. 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:56621-48-8) here.

Sulfur(VI) Fluoride Exchange (SuFEx) chem. has emerged as a next-generation click reaction, designed to assemble functional mols. quickly and modularly. Here, we report the ex situ generation of trifluoromethanesulfonyl fluoride (CF3SO2F) gas in a two chamber system, and its use as a new SuFEx handle to efficiently synthesize triflates and triflamides. This broadly tolerated protocol lends itself to peptide modification or to telescoping into coupling reactions. Moreover, redesigning the SVI-F connector with a S=O → S=NR replacement, furnished the analogous triflimidoyl fluorides as SuFEx electrophiles, which were engaged in the synthesis of rarely reported triflimidate esters. Notably, experiments showed H2O to be the key towards achieving chemoselective trifluoromethanesulfonation of phenols vs. amine groups, a phenomenon best explained-using ab initio metadynamics simulations-by a hydrogen bonded termol. transition state for the CF3SO2F triflylation of amines.

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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 An efficient asymmetric approach to the R-enantiomer impurity of esomeprazole, published in 2016, which mentions a compound: 73590-85-9, mainly applied to esomeprazole preparation enantioselective, HPLC of Formula: 73590-85-9.

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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Ether – Wikipedia,
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Category: ethers-buliding-blocks. 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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Ether – Wikipedia,
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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 Oxygen dependence of omeprazole clearance and sulfone and sulfide metabolite formation in the isolated perfused rat liver.Safety of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole.

This study, in the isolated perfused rat liver, examined the O dependence of the hepatic elimination of omeprazole, a drug which undergoes extensive oxidative metabolism in the rat. The relationship between hepatic O supply and the production of omeprazole’s oxidative sulfone and reductive sulfide metabolites was also examined Rat livers were perfused with a perfusate containing 5 μg omeprazole/mL in a single-pass design. Omeprazole clearance and the formation clearance of the 2 metabolites were measured in each liver during normal oxygenation, at different levels of hypoxia and after reoxygenation. There was a linear relationship between omeprazole clearance and O delivery over the whole range studied. Production of the sulfone was similarly O-dependent whereas the sulfide was detectable only after a significant reduction in oxygenation. In further experiments the O dependence of omeprazole clearance was not altered when the concentration of drug was lowered to 1 μg/mL. This study shows that O delivery is a critical determinant of the rate of oxidative drug metabolism in the isolated liver and supports the contention that reductions in hepatic O supply may alter the hepatic disposition of oxidatively metabolized drugs in vivo.

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Ether – Wikipedia,
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Reference of 4-(Piperazin-1-yl)phenol. 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: 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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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem