Month: April 2022

HPLC of Formula: 56621-48-8. 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 Synthesis of New N1 Arylpiperazine Substituted Xanthine Derivatives and Evaluation of their Antioxidant and Cytotoxic Effects. Author is Andonova, Lily; Valkova, Iva; Zheleva-Dimitrova, Dimitrina; Georgieva, Maya; Momekov, Georgi; Zlatkov, Alexander.

A series of new xanthine derivatives comprising an arylpiperazine I (R = Bn, 4-FC6H4, 2-MeOC6H4, etc.) moiety at N1 were synthesized. The cytotoxicity against human T-cell leukemia cell SKW-3, human acute myeloid leukemia HL-60 and human Bcell precursor leukemia cell REH is evaluated. The relationship between the structure and cytotoxicity of the compounds was investigated by quant. structure-activity relationship (QSAR) anal. and the important structural parameters were drawn. The purity of the substances is proven by corresponding m.ps. and elemental anal. The antioxidant activity has been evaluated by four common methods – DPPH, ABTS, FRAP and lipid peroxidation assay. The cytotoxic effects of the tested series were evaluated using the standard MTT-dye reduction assay on three tumor cell lines. The highest antioxidant activity was demonstrated by compound I (R = 4-HOC6H4). The highest cytotoxic effect was observed for compound I (R = bis(4-fluorophenyl)methyl). It was found that cytotoxicity against SKW-3 depends on the electron d. distribution in the structures. Branching of the mol. skeleton and introduction of heteroatoms like fluorine and sulfur in the structures also significantly improved the antiproliferative activity of the compounds

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

HPLC of Formula: 73590-85-9. 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 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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Ether – Wikipedia,
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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.Jang, Hyun-Hee; Ryu, Sang-Hoon; Le, Thien-Kim; Doan, Tiep Thi My; Nguyen, Thi Huong Ha; Park, Ki Deok; Yim, Da-Eun; Kim, Dong-Hyun; Kang, Choong-Kyung; Ahn, Taeho; Kang, Hyung-Sik; Yun, Chul-Ho researched the compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole( cas:73590-85-9 ).Synthetic Route of C17H19N3O2S.They published the article 《Regioselective C-H hydroxylation of omeprazole sulfide by Bacillus megaterium CYP102A1 to produce a human metabolite》 about this compound( cas:73590-85-9 ) in Biotechnology Letters. Keywords: regioselective carbon hydrogen hydroxylation omeprazole sulfide bacillus megaterium CYP102A1; 5-Hydroxyomeprazole sulphide; CYP102A1 mutant; Human metabolite; Hydroxylation; Omeprazole sulfide; Regioselectivity. We’ll tell you more about this compound (cas:73590-85-9).

Objectives: To find a simple enzymic strategy for the efficient synthesis of the expensive 5′-hydroxyomeprazole sulfide, a recently identified minor human metabolite, from omeprazole sulfide, which is an inexpensive substrate. Results: The practical synthetic strategy for the 5′-OH omeprazole sulfide was accomplished with a set of highly active CYP102A1 mutants, which were obtained by blue colony screening from CYP102A1 libraries with a high conversion yield. The mutant and even the wild-type enzyme of CYP102A1 catalyzed the high regioselective (98 %) C-H hydroxylation of omeprazole sulfide to 5′-OH omeprazole sulfide with a high conversion yield (85-90 %). Conclusions: A highly efficient synthesis of 5′-OH omeprazole sulfide was developed using CYP102A1 from Bacillus megaterium as a biocatalyst.

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

Recommanded Product: 1-Methyl-3-(thiophen-2-yl)-1H-pyrazol-5-amine. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1-Methyl-3-(thiophen-2-yl)-1H-pyrazol-5-amine, is researched, Molecular C8H9N3S, CAS is 118430-78-7, about 5-Aminopyrazoles as Dienophiles in the Inverse Electron Demand Diels-Alder Reactions of 2,4,6-Tris(ethoxycarbonyl)-1,3,5-triazine: Syntheses of Pyrazolopyrimidines. Author is Dang, Qun; Brown, Brian S.; Erion, Mark D..

[4 + 2] Cycloaddition reactions of 2,4,6-tris(ethoxycarbonyl)-1,3,5-triazine with 5-aminopyrazoles are reported. This methodol. is suitable for the one-step synthesis of highly substituted pyrazolo[3,4-d]pyrimidines.

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

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 SuFEx-enabled, chemoselective synthesis of triflates, triflamides and triflimidates, published in 2022, which mentions a compound: 56621-48-8, mainly applied to aryltriflate preparation; aryltriflamide preparation; aryltriflimidate preparation; aryl amide preparation, SDS of cas: 56621-48-8.

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 were reported. 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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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Reference of 4-(Piperazin-1-yl)phenol. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Syntheses and radiofluorination of two derivatives of 5-cyano-indole as selective ligands for the dopamine subtype-4 receptor. Author is Tietze, Rainer; Hocke, Carsten; Loeber, Stefan; Huebner, Harald; Kuwert, Torsten; Gmeiner, Peter; Prante, Olaf.

Two fluoroethoxy derivatives, namely 2-{4-[2-(2-fluoroethoxy)phenyl]piperazin-1-ylmethyl}indole-5-carbonitrile (I) and 2-{4-[4-(2-fluoroethoxy)phenyl]piperazin-1-ylmethyl}indole-5-carbonitrile (II) were synthesized as analogs of the selective D4 receptor ligand 2-[4-(4-fluorophenyl)piperazin-1-ylmethyl]indole-5-carbonitrile (FAUC 316). In vitro characterization using CHO-cells expressing different dopamine receptor subtypes gave Ki = 2.1 and 9.9 nM of I and II, resp., for the dopamine D4 subtype and displayed a 420-fold D4-selectivity over D2 receptors for II. Candidate II revealed substantially reduced α1 and serotoninergic binding affinities in comparison to I. To provide potential PET imaging probes for the dopamine D4 receptor, 18F-labeling conditions using [18F]fluoroethyl tosylate were optimized and led to radiochem. yields of 81 ± 5% (18F-I) and 47 ± 4% (18F-II) (n = 3, decay-corrected, referred to labeling agent), resp. Thus, 18F-fluoroethylation favorably at the para position of the phenylpiperazine moiety of the 5-cyanoindole framework proved to be tolerated by D4 receptors and could also be applied to alternative scaffolds to develop D4 radioligand candidates for PET with improved D4 receptor affinity and selectivity.

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Ether – Wikipedia,
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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 Conformational analysis of 1-arylpiperazines and 4-arylpiperidines, published in 1993-02-28, which mentions a compound: 56621-48-8, mainly applied to conformation piperazine piperidine aryl; AM1 PM3 MNDO arylpiperazine arylpiperidine; mol mechanic arylpiperazine arylpiperidine; rotation barrier arylpiperazine arylpiperidine, Product Details of 56621-48-8.

A conformational anal. of 1-arylpiperazines and 4-arylpiperidines is presented using mol.-mechanics and semi-empirical calculations Electronic effects of substituents on the aryl ring determine the conformational behavior of 1-arylpiperazines. Steric effects play a minor role. Electron-withdrawing substituents on the aryl moiety increase the conjugation between the anilino nitrogen lone pair and the π electrons of the aryl group and direct the orientation between the aryl and heterocycle towards the same plane. Electron-releasing substituents have the opposite effect and reduce the energy difference between a coplanar and perpendicular orientation between the rings. 4-Arylpiperidines prefer a perpendicular orientation between the rings.

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

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 56621-48-8, is researched, Molecular C10H14N2O, about Investigations on dendrimer space reveal solid and liquid tumor growth-inhibition by original phosphorus-based dendrimers and the corresponding monomers and dendrons with ethacrynic acid motifs, the main research direction is Edecrin phosphorus dendrimer dendron antiproliferative epidermal carcinoma leukemia growth.Safety of 4-(Piperazin-1-yl)phenol.

The well-known reactive diuretic ethacrynic acid (EA, Edecrin), with low antiproliferative activities, was chem. modified and grafted onto phosphorus dendrimers and the corresponding simple branched phosphorus dendron-like derivatives affording novel nanodevices showing moderate to strong antiproliferative activities against liquid and solid tumor cell lines, resp.

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

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Evidence for acid-induced transformation of omeprazole into an active inhibitor of proton-potassium ATPase within the parietal cell, published in 1984, which mentions a compound: 73590-85-9, Name is 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, Molecular C17H19N3O2S, Recommanded Product: 73590-85-9.

The chem. reactions of omeprazole (I) [73590-58-6], leading to inhibition of gastric acid secretion, were investigated. In acid buffer solutions, omeprazole was found to be labile, whereas at physiol. pH it was stable (t1/2 > 17 h at pH 7.4). The stability of omeprazole was also studied in isolated, acid producing, gastric glands under conditions where acid formation was either stimulated or inhibited. The rate of transformation of omeprazole was high (t1/2 ≈ 3 min) under stimulation. Inhibition of acid formation in the gland greatly retarded the decomposition of omeprazole (t1/2 ≈ 73 min). The time-course for inhibition of acid formation by omeprazole was parallel to that for decomposition The major product formed from omeprazole was the reduced form, H 168/22 (II) [73590-85-9]. The inhibitory action of omeprazole was shown to depend on acid-induced transformation, since no inhibition was obtained when omeprazole was incubated under neutral conditions, both in the isolated gastric mucosal- and the (H+ + K+)-ATPase  [9000-83-3] preparations Despite the fact that H 168/22 was the major product formed in the glandular preparation, it was found to be virtually inactive in both the glandular and (H+ and K+)-ATPase preparations Therefore, a model is proposed in which the inhibition of acid formation by omeprazole is mediated by a compound formed during the reduction of omeprazole to H 168/22 within the acid compartments of the parietal cell. Furthermore, mercaptans, such as β-mercaptoethanol, were found to prevent as well as reverse inhibition by omeprazole in both the glandular- and (H+ + K+)-ATPase preparations This indicates that -SH groups are most likely involved in the chem. reactions leading to inhibition of acid secretion.

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

Application of 56621-48-8. 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 Factors Governing Selectivity of Dopamine Receptor Binding Compounds for D2R and D3R Subtypes.

Targeting the D3 dopamine receptor (D3R) is a promising pharmacotherapeutic strategy for the treatment of many disorders. The structure of the D3R is similar to the D2 dopamine receptor (D2R), especially in the transmembrane spanning regions that form the orthosteric binding site, making it difficult to identify D3R selective pharmacotherapeutic agents. Here, the authors examine the mol. basis for the high affinity D3R binding and D3R vs. D2R binding selectivity of substituted phenylpiperazine thiopheneamides. Removing the thiophenearylamide portion of the ligand consistently decreases the affinity of these ligands at D3R, while not affecting their affinity at the D2R. The authors’ long (>10μs) mol. dynamics simulations demonstrated that both dopamine receptor subtypes adopt two major conformations that the authors refer to as closed or open conformations, with D3R sampling the open conformation more frequently than D2R. The binding of ligands with conjoined orthosteric-allosteric binding moieties causes the closed conformation to populate more often in the trajectories. Also, significant differences were observed in the extracellular loops (ECL) of these two receptor subtypes leading to the identification of several residues that contribute differently to the ligand binding for the two receptors that could potentially contribute to ligand binding selectivity. The authors’ observations also suggest that the displacement of ordered water in the binding pocket of D3R contributes to the affinity of the compounds containing an allosteric binding motif. These studies provide a better understanding of how a bitopic mode of engagement can determine ligands that bind selectively to D2 and D3 dopamine receptor subtypes.

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