Month: April 2022

Safety 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 New N,S-substituted dienes from mono(thio)substituted-2-nitrohalo-1,3-diene and some amines. Author is Ibis, Cemil; Kirbaslar, F.; Aydinli, Goeksin.

1-(4-Methoxyphenylthio)-2-nitro-1,3,4,4-tetrachloro-1,3-butadiene, (I) reacted with piperazine derivatives and yielded N,S-substituted chloronitrodienes in methylene chloride. Compound I gave dioxaspiro-piperidinyl-substituted chloronitrodiene by the reaction with 1,4-dioxa-8-azaspiro-4,5-decane. 4-Substituted piperidinyl chloronitrodiene derivatives were obtained by the reactions of piperidines with I. 1-(4-Methoxyphenylthio)-2-nitro-1-(4-(p-nitrophenyl)piperazin-1-yl)-1,3,4,4-tetrachloro-1,3-butadiene also was structurally characterized using single-crystal X-ray diffraction anal. [triclinic, P-1, a 7.8400(2), b 9.7030(3), c 16.9628(4) Å, α 93.898(3), β 93.879(2), γ 96.9296(13)°, V 1260.67(6) Å3, Z 2].

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

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

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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Ether – Wikipedia,
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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1-Methyl-3-(thiophen-2-yl)-1H-pyrazol-5-amine(SMILESS: NC1=CC(C2=CC=CS2)=NN1C,cas:118430-78-7) is researched.COA of Formula: C17H19N3O2S. The article 《N,N-Dialkyl-N’-Chlorosulfonyl Chloroformamidines in Heterocyclic Synthesis. Part XII.* Synthesis and Reactivity of the Pyrazolo[3,4-e][1,2,4]thiadiazine Ring System》 in relation to this compound, is published in Australian Journal of Chemistry. Let’s take a look at the latest research on this compound (cas:118430-78-7).

N,N-Dialkyl-N’-chlorosulfonyl chloroformamidines 1 reacted regioselectively with 1-substituted 5-aminopyrazoles 2 via a 1,3-CCN dinucleophilic substitution to afford pyrazolo[3,4-e][1,2,4]thiadiazines 3 e. g., I, as the sole isolated products. Compounds 3, representatives of a very rare ring system, were shown to possess three nucleophilic sites at N2, N4, and N6. Methylation occurred at all three sites. Alkylation with benzylic halides occurred preferentially at N2, but some also occurred at N4, and at C7a. Alkylation with Et bromoacetate occurred at both N4 and N6, but the latter derivatives underwent a pyrazole ring expansion to afford pyrimido[4,5-e][1,2,4]thiadiazine derivs, e. g., II. Compounds 3 were unreactive towards various acylating agents.

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole( cas:73590-85-9 ) is researched.COA of Formula: C17H19N3O2S.Nevado, Juan Jose Berzas; Penalvo, Gregorio Castaneda; Dorado, Rosa Maria Rodriguez; Robledo, Virginia Rodriguez published the article 《Simultaneous determination of omeprazole and their main metabolites in human urine samples by capillary electrophoresis using electrospray ionization-mass spectrometry detection》 about this compound( cas:73590-85-9 ) in Journal of Pharmaceutical and Biomedical Analysis. Keywords: omeprazole metabolite capillary electrophoresis electrospray ionization mass spectrometry; Capillary electrophoresis-mass spectrometry; Human urine; Metabolites; Omeprazole; Pharmacokinetics. Let’s learn more about this compound (cas:73590-85-9).

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,
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: 1-Methyl-3-(thiophen-2-yl)-1H-pyrazol-5-amine, is researched, Molecular C8H9N3S, CAS is 118430-78-7, about Studies on dihydropyridines. II. Synthesis of 4,7-dihydropyrazolo[3,4-b]pyridines with vasodilating and antihypertensive activities.Recommanded Product: 1-Methyl-3-(thiophen-2-yl)-1H-pyrazol-5-amine.

A series of 4-aryl-4,7-dihydropyrazolo[3,4-b]pyridine-5-carboxylate derivatives I (R = Me, Ph, cyclopentyl; R1 = Me, Et, CHMe2, cyclohexyl, substituted phenethyl, etc.; R2 = 2-O2NC6H4, 3-O2NC6H4, 2-ClC6H4, 2.8-Cl2C6H4, pyridyl; R3 = H, Me, CHMe2, Ph, cycloalkyl, CO2Et, pyridyl, etc.) was prepared and the compounds were tested for Ca-blocking activity in isolated guinea pig portal vein, antihypertensive activity in spontaneously hypertensive rats, and coronary vasodilating effect in isolated guinea pig heart. A number of derivatives had potent antihypertensive and coronary vasodilating activities. The structure-activity relationships of the series indicated that a 3-cyclopentyl or 3-cyclohexyl substituent and a hydrophobic 5-ester moiety with moderate bulkiness were effective for increasing the pharmacol. potencies.

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

Application In Synthesis 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 Investigating the presence of omeprazole in waters by liquid chromatography coupled to low and high resolution mass spectrometry: degradation experiments. Author is Boix, C.; Ibanez, M.; Sancho, J. V.; Niessen, W. M. A.; Hernandez, F..

Omeprazole is one of the most consumed pharmaceuticals around the world. However, this compound is scarcely detected in urban wastewater and surface water. The absence of this pharmaceutical in the aquatic ecosystem might be due to its degradation in wastewater treatment plants, as well as in receiving water. Different laboratory-controlled degradation experiments were carried out on surface water to elucidate omeprazole transformation products (TPs). Surface water spiked with omeprazole was subjected to hydrolysis, photo-degradation under both sunlight and UV radiation and chlorination. Analyses by liquid chromatog. coupled to quadrupole time-of-flight mass spectrometry (LC-QTOF MS) permitted identification of ≤17 omeprazole TPs. In a subsequent step, the TPs identified were sought in surface water and urban wastewater by LC-QTOF MS and by LC coupled to tandem mass spectrometry with triple quadrupole. The parent omeprazole was not detected in any of the samples, but 4 TPs were found in several water samples. The most frequently detected compound was OTP 5 (omeprazole sulfide), which might be a reasonable candidate to be included in monitoring programs rather than the parent omeprazole. Copyright pr 2013 John Wiley & Sons, Ltd.

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

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, Nuclear Medicine and Biology called In vitro metabolism studies of 18F-labeled 1-phenylpiperazine using mouse liver S9 fraction, Author is Ryu, Eun Kyoung; Choe, Yearn Seong; Kim, Dong Hyun; Ko, Bong-Ho; Choi, Yong; Lee, Kyung-Han; Kim, Byung-Tae, which mentions a compound: 56621-48-8, SMILESS is OC1=CC=C(N2CCNCC2)C=C1, Molecular C10H14N2O, SDS of cas: 56621-48-8.

The in vitro metabolism of 1-(4-[18F]fluoromethylbenzyl)-4-phenylpiperazine ([18F]1) and 1-(4-[18F]fluorobenzyl)-4-phenylpiperazine ([18F]2) was investigated using mouse liver S9 fraction. Results were compared to those of in vivo metabolism using mouse blood and bone and to in vitro metabolism using mouse liver microsomes. Defluorination was the main metabolic pathway for [18F]1 in vitro and in vivo. Based on TLC, HPLC and LC-MS data, [18F]fluoride ion and less polar radioactive metabolites derived from aromatic ring oxidation were detected in vitro, and the latter metabolites were rapidly converted into the former with time, whereas only the [18F]fluoride ion was detected in vivo. Similarly, the in vitro metabolism of [18F]2 using either S9 fraction or microsomes showed the same pattern as the in vivo method using blood; however, the radioactive metabolites derived from aromatic ring oxidation were not detected in vivo. These results demonstrate that liver S9 fraction can be widely used to investigate the intermediate radioactive metabolites and to predict the in vivo metabolism of radiotracers.

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