Month: April 2022

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 structure-activity relationship studies of novel pleuromutilin derivatives having a piperazine ring, published in 2016, which mentions a compound: 56621-48-8, mainly applied to pleuromutilin antibiotic preparation aryl pyrazinyl derivative structure activity relationship; drug design; molecular modeling; natural product; structure-based drug design, Recommanded Product: 56621-48-8.

A series of novel pleuromutilin derivatives I (R = 2-MeOC6H4, 3-MeOC6H4, 4-MeOC6H4, 2-MeC6H4, 3-MeC6H4, 4-MeC6H4, 2-HOC6H4, 3-HOC6H4, 4-HOC6H4, 2-NO2C6H4, 3-NO2C6H4, 4-NO2C6H4, 2-ClC6H4, 3-ClC6H4, 4-ClC6H4, Ph, Me), possessing piperazine moieties were synthesized under mild conditions. The in vitro antibacterial activities of these derivatives against Staphylococcus aureus and Escherichia coli were tested by the agar dilution method. Structure-activity relationship studies resulted in compounds 11b (R = 3-MeOC6H4), 13b (R = 3-HOC6H4), and 14a (R = 2-NO2C6H4) with the most potent in vitro antibacterial activity among the series (minimal inhibitory concentration of 0.0625-0.125 μg/mL). The binding of compounds 11b, 13b, and 14a to the E. coli ribosome was investigated by mol. modeling, and it was found that there is a reasonable correlation between the binding free energy and the antibacterial activity.

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

Reference of 1-Methyl-3-(thiophen-2-yl)-1H-pyrazol-5-amine. 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: 1-Methyl-3-(thiophen-2-yl)-1H-pyrazol-5-amine, is researched, Molecular C8H9N3S, CAS is 118430-78-7, about Improving the Use of Ranking in Virtual Screening against HIV-1 Integrase with Triangular Numbers and Including Ligand Profiling with Antitargets. Author is Garcia-Sosa, Alfonso T.; Maran, Uko.

A delicate balance exists between a drug mol.’s toxicity and its activity. Indeed, efficacy, toxicity, and side effect problems are a common cause for the termination of drug candidate compounds and development projects. To address this, an antitarget interaction profile is built and combined with virtual screening and cross docking for new inhibitors of HIV-1 integrase, in order to consider possible off-target interactions as early as possible in a drug or hit discovery program. New ranking techniques using triangular numbers improve ranking information on the compounds and recovery of known inhibitors into the top compounds using different docking programs. This improved ranking arises from using consensus of ranks between docking programs and ligand efficiencies to derive a new rank, instead of using absolute score values, or average of ranks. The triangular number rerank also allowed the objective combination of results from several protein targets or screen conditions and several programs. Triangular number reranking conserves more information than other reranking methods such as average of scores or averages of ranks. In addition, the use of triangular numbers for reranking makes possible the use of thresholds with a justified leeway based on the number of available known inhibitors, so that the majority of the compounds above the threshold in ranks compare to the compounds that have known exptl. determined biol. activity. The battery of anti- or off-targets can be tailored to specific mol. or drug design challenges. In silico filters can thus be deployed in successive stages, for prefiltering, activity profiling, and for further anal. and triaging of libraries of compounds

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

Computed Properties of C10H14N2O. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Synthesis and bioevaluation of 4,5,6,7-tetrahydrobenzo[d]isoxazole derivatives as melanogenesis inhibitors. Author is Song, Jiho; Lee, Kiho; Kim, Doran; Kim, Jongmin; Lee, Seul; Shin, Jun Seob; Kim, Dong-Seok; Min, Kyung Hoon.

A series of 4,5,6,7-tetrahydrobenzo[d]isoxazole derivatives I [R1 = H, tert-butyl; R2 = 4-OH, 4-OMe, 2-OMe, 4-CF3, 4-F] was prepared via amide coupling of arylpiperazines with corresponding 4,5,6,7-tetrahydrobenzo[d]isoxazole carboxylic acid chlorides. Addnl., 4,5,6,7-tetrahydrobenzo[d]isoxazole derivative I [R1 = H; R2 = 4-OEt] was synthesized by O-alkylation of compound I [R1 = H; R2 = 4-OH] using iodoethane. The synthesized compounds were tested for their melanogenesis inhibiting activity through potential down-regulation of tyrosinase expression. Among the tested compounds, compounds I [R1 = H; R2 = 4-OMe, 2-OMe, 4-CF3] displayed better melanogenesis inhibiting activity than well-known compounds Arbutin and Kojic acid, without intrinsic cytotoxicity.

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Reference:
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, Journal of the Electrochemical Society called Electrochemical oxidation of 4-(piperazin-1-yl)phenol in the presence of aryl sulfinic acids, Author is Nematollahi, Davood; Khazalpour, Sadegh; Amani, Amene, the main research direction is electrochem oxidation piperazinylphenol aryl sulfinic acid addition.COA of Formula: C10H14N2O.

Electrochem. oxidation of 4-(piperazin-1-yl)phenol was studied in the presence of aryl sulfinic acids as nucleophiles in EtOH/H2O mixture (10/90) using cyclic voltammetry and controlled-potential coulometry methods. The electrochem. generated p-quinone-imine participates in Michael type addition reaction with aryl sulfinic acids and via an EC mechanism converts to the new 2-(phenylsulfonyl)-4-(piperazin-1-yl)phenol derivatives The present work led to the development of a facile and environmentally friendly electrochem. method for the synthesis of some new 2-(phenylsulfonyl)-4-(piperazin-1-yl)phenol derivatives under green conditions.

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Reference:
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 N-Substituted S-Alkyl Carbamothioates in the Synthesis of Nitrogen-containing Functional Derivatives of the Adamantane Series, published in 2021-08-31, which mentions a compound: 56621-48-8, mainly applied to urea adamantyl preparation; urethane adamantyl preparation, Recommanded Product: 4-(Piperazin-1-yl)phenol.

A series of new asym. ureas, urethanes, and other derivatives of the framework structure I [R = OCH2C2OH, (2-methylquinolin-4-yl)aminyl, 4-methylpiperazin-1-yl.HCl, etc.] have been synthesized by the reactions of adamantan-1-yl isocyanate generated in situ by the thermolysis of S-Et (adamantan-1-yl)carbamothioate with nitrogen-containing nucleophiles and alcs.

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Reference:
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 Synthesis, Radiofluorination, and In Vitro Evaluation of Pyrazolo[1,5-a]pyridine-Based Dopamine D4 Receptor Ligands: Discovery of an Inverse Agonist Radioligand for PET, published in 2008-03-27, which mentions a compound: 56621-48-8, mainly applied to pyrazolopyridine arylpiperazinylmethyl preparation radiofluorination dopamine receptor radioligand, Synthetic Route of C10H14N2O.

A series of fluoro-substituted analogs structurally derived from the aminomethyl-substituted pyrazolo[1,5-a]pyridine lead compounds FAUC 113 and FAUC 213 were synthesized and evaluated as high-affinity D4 receptor (D4R) ligands (Ki = 1.3-28 nM). The para-fluoroethoxy-substituted derivatives I and II revealed an outstanding D4 subtype selectivity of more than 3 orders of magnitude over both congeners D2 and D3 combined with inverse agonism at D4R. The corresponding 18F-labeled radioligands revealed high serum stability in vitro and log P values of 2-3. In vitro rat brain autoradiog. showed specific binding of [18F]-II in distinct brain regions, including the gyrus dentate of the hippocampus, that were inhibited by both eticlopride (65-80%) and the selective D4R antagonist 10 (78-93%). The observed binding pattern was mainly consistent with the known D4R distribution in the rat brain. Thus, [18F]-II (FAUC F41) represents a potential radioligand for studying the D4R in vivo by positron emission tomog. (PET).

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

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 4-(Piperazin-1-yl)phenol(SMILESS: OC1=CC=C(N2CCNCC2)C=C1,cas:56621-48-8) is researched.Synthetic Route of C17H19N3O2S. The article 《Electrochemical Synthesis of a New Derivative of 1,4-Dihydroxybenzene: Embedded Nucleophile in the Structure of Electrophile》 in relation to this compound, is published in Journal of the Electrochemical Society. Let’s take a look at the latest research on this compound (cas:56621-48-8).

The electrochem. oxidation of 4-(Piperazin-1-yl)phenols (1a,b) was studied in the H2O, MeCN and nitromethan by cyclic voltammetry and controlled-potential coulometry. P-quinone-imines generated of oxidation 4-(Piperazin-1-yl)phenols after the hydrolysis reaction participate in Michael-addition reactions with released piperazine of hydrolysis reaction of p-quinone imines. The present work led to the development of a facile and environmentally friendly electrochem. method for the synthesis of a new derivative of 1,4-dihydroxybenzene under green conditions. The effect of H2O as a solute on the electrochem. response of 4-(Piperazin-1-yl)phenols (1a,b) was examined in the MeCN (AN) and nitromethane (NM) solvent.

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

Synthetic Route of C17H19N3O2S. 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: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about An efficient asymmetric approach to the R-enantiomer impurity of esomeprazole. Author is Zhou, Guobin; Guan, Yueqing.

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

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 4-(Piperazin-1-yl)phenol(SMILESS: OC1=CC=C(N2CCNCC2)C=C1,cas:56621-48-8) is researched.Reference of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole. The article 《Potent, selective, and orally active adenosine A2A receptor antagonists: Arylpiperazine derivatives of pyrazolo[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines》 in relation to this compound, is published in Bioorganic & Medicinal Chemistry Letters. Let’s take a look at the latest research on this compound (cas:56621-48-8).

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

Reference of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole. 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 Omeprazole determination using HPLC with coulometric detection.

A sensitive high performance liquid chromatog. (HPLC) method for the determination of omeprazole and three related benzimidazoles is reported. Coulometric detection was carried out at +800 mV using a porous carbon electrode. The linear range is 0.01-10 μg/mL. The method has a high degree of precision; the relative standard deviation of omeprazole at a concentration of 1.06 μg/mL was 0.7% (n=4). The cyclic voltammogram of omeprazole is consistent with the hydrodynamic voltammogram exhibiting a single major irreversible oxidative wave with a peak potential at +1105 mV. The response factors for the four compounds are similar indicating that the oxidative process does not involve the sulfur moiety exclusively. The data are most consistent with oxidation primarily of the benzimidazole groups. The method was applied successfully to the determination of omeprazole in a paste formulation.

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