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 Synthesis and bioevaluation of 4,5,6,7-tetrahydrobenzo[d]isoxazole derivatives as melanogenesis inhibitors, published in 2014-02-20, which mentions a compound: 56621-48-8, mainly applied to arylpiperazinyl tetrahydrobenzoisoxazolyl methanone preparation melanogenesis inhibitor SAR; tetrahydrobenzoisoxalyl carboxylic acid chloride preparation arylpiperazine amide coupling, Recommanded Product: 4-(Piperazin-1-yl)phenol.

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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Staack, R. F.; Theobald, D. S.; Paul, L. D.; Springer, D.; Kraemer, T.; Maurer, H. H. published an article about the compound: 4-(Piperazin-1-yl)phenol( cas:56621-48-8,SMILESS:OC1=CC=C(N2CCNCC2)C=C1 ).SDS of cas: 56621-48-8. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:56621-48-8) through the article.

The in vivo metabolism of 1-(4-methoxyphenyl)piperazine (MeOPP), a novel designer drug, was studied in male Wistar rats. MeOPP was mainly O-demethylated to 1-(4-hydroxyphenyl)piperazine (4-HO-PP) in addition to degradation of the piperazine moiety. O-demethylation, the major metabolic step, was studied with cDNA-expressed human hepatic cytochrome P 450 (CYP) enzymes in pooled human liver microsomes (pHLM) and in single donor human liver microsomes with CYP2D6 poor metabolizer genotype (PM HLM). CYP2D6 catalyzed O-demethylation with apparent Km and Vmax values of 48.34 μM and 5.44 pmol min-1 pmol-1 CYP, resp. pHLM catalyzed the monitored reaction with an apparent Km = 204.80 μM and Vmax = 127.50 pmol min-1 mg-1 protein. The CYP2D6-specific chem. inhibitor quinidine (1 and 3 μM) significantly inhibited 4-HO-PP formation by 71.9% and by 98.5%, resp., in incubation mixtures with pHLM and 200 μM MeOPP. O-demethylation was significantly lower in PM HLM compared with pHLM (70.6%). These data suggest that polymorphically expressed CYP2D6 is the enzyme mainly responsible for MeOPP O-demethylation.

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Recommanded Product: 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 Electrochemical oxidation of acetaminophen and 4-(piperazin-1-yl)phenols in the presence of 4-hydroxy-1-methyl-2(1H)-quinolone.

A facile and 1-pot electrochem. method for the synthesis of mono and disubstituted 1,4-benzoquinones generated from the electrochem. oxidation of 1-(4-(4-hydroxyphenyl)piperazin-1-yl)ethanone (1a), 4-(piperazin-1-yl)phenol (1b) and acetaminophen (8) in the presence of 4-hydroxy-1-methyl-2(1H)-quinolone (3) as nucleophile is reported. The electrochem. generated electrophiles derived from the oxidation of 1a, 1b and 8 participate in Michael-addition reactions with 3. The authors report the synthesis of mono and diquinolone substituted of 1,4-benzoquinone in good yields based on controlled potential condition at C electrode in a divided cell.

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Reference 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 Acaricidal properties of piperazine and its derivatives against house-dust and stored-food mites. Author is Lee, Chi-Hoon; Kim, Hyung-Wook; Lee, Hoi-Seon.

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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Lagerstroem, Per Olof; Persson, Bengt Arne published the article 《Determination of omeprazole and metabolites in plasma and urine by liquid chromatography》. Keywords: omeprazole metabolite determination blood urine; liquid chromatog omeprazole metabolite.They researched the compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole( cas:73590-85-9 ).Formula: C17H19N3O2S. 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:73590-85-9) here.

Omeprazole (I) [73590-58-6], a substituted benzimidazole and a new gastric acid inhibitor, was determined in plasma and urine, together with 3 of its metabolites: the sulfide [73590-85-9], the sulfone [88546-55-8] and the hydroxy compound [92340-57-3]. The methods comprised extraction from the biol. materials with CH2Cl2, followed either by direct injection of the extract onto a normal-phase liquid chromatog. column or evaporation, dissolution, and injection onto a reversed-phase system. The compounds were detected by UV spectrometry. The absolute recoveries obtained were mostly >95%. The min. determinable concentration of omeprazole was 20 nmol/L plasma (relative standard deviation 10-15%) and 50 nmol/L in urine. The metabolites could also be determined at the same levels.

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Seshadri, Raja Kumar; Raghavaraju, Thummala Veera; Chakravarthy, Ivon Elisha published an article about the compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole( cas:73590-85-9,SMILESS:CC1=CN=C(CSC2=NC3=CC(OC)=CC=C3N2)C(C)=C1OC ).Computed Properties of C17H19N3O2S. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:73590-85-9) through the article.

A gradient reversed-phase liquid chromatog. (RP-LC) method was developed for the quant. estimation of impurities in the pharmaceutical dosage form of Omeprazole and Domperidone capsules. The developed method is a stability-indicating test method for the estimation of impurities generated during the formulation and storage of Omeprazole and Domperidone capsules. The chromatog. separation was achieved on a column packed with octadecyl silane, having a column length of 250 mm and diameter of 4.6 mm with a particle size of 5 μm, and by following a gradient program using a combination of a monobasic potassium phosphate buffer (0.05M) and acetonitrile. Since the spectral properties were similar, both compounds’ individual impurities were estimated at 285 nm. Forced degradation studies were performed on Omeprazole pellets (enteric coated) and Domperidone pellets (SR coated) encapsulated in size “”1″” hard gelatin capsules. Omeprazole and Domperidone were degraded using acid hydrolysis (0.1 N hydrochloric acid), base (0.1 N sodium hydroxide), oxidation (50% hydrogen peroxide), heat (105 °C), and UV light (254 nm). The established method was validated and found to be linear, accurate, precise, specific, robust, and rugged.

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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: 4-(Piperazin-1-yl)phenol( cas:56621-48-8 ) is researched.Formula: C10H14N2O.Chen, Peng-Jen; Taylor, Michelle; Griffin, Suzy A.; Amani, Armaghan; Hayatshahi, Hamed; Korzekwa, Kenneth; Ye, Min; Mach, Robert H.; Liu, Jin; Luedtke, Robert R.; Gordon, John C.; Blass, Benjamin E. published the article 《Design, synthesis, and evaluation of N-(4-(4-phenyl piperazin-1-yl)butyl)-4-(thiophen-3-yl)benzamides as selective dopamine D3 receptor ligands》 about this compound( cas:56621-48-8 ) in Bioorganic & Medicinal Chemistry Letters. Keywords: dopamine receptor G protein coupled receptor drug addiction; D(2); D(3); Dopamine receptor; Drug addiction; G-protein coupled receptor (GPCR). Let’s learn more about this compound (cas:56621-48-8).

As part of our on-going effort to explore the role of dopamine receptors in drug addiction and identify potential novel therapies for this condition, we have a identified a series of N-(4-(4-Ph piperazin-1-yl)butyl)-4-(thiophen-3-yl)benzamide D3 ligands. Members of this class are highly selective for D3 vs. D2, and we have identified two compounds (13g and 13r) whose rat in vivo IV pharmacokinetic properties that indicate that they are suitable for assessment in in vivo efficacy models of substance use disorders.

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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.Product Details of 56621-48-8. The article 《A simple and sensitive bioanalytical assay for simultaneous determination of omeprazole and its three major metabolites in human blood plasma using RP-HPLC after a simple liquid-liquid extraction procedure. [Erratum to document cited in CA146:074538]》 in relation to this compound, is published in Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences. Let’s take a look at the latest research on this compound (cas:73590-85-9).

On page 317, Table 2 is incorrect; in the first column titled “”Analyte””, the entries “”omeprazole sulfone”” and “”omeprazole”” should be reversed. On page 319, Table 3 is incorrect for the same reason Table 2 is incorrect. On pages 318 and 320, Figs. 3-5 are incorrect; each of the “”OPZ-SFN”” peaks should be labeled “”OPZ”” and the “”OPZ”” peaks should be labeled “”OPZ-SFN.””. On page 320, the legend of Figure 6 is incorrect; “”omeprazole sulfone”” should be replaced with “”omeprazole”” and “”omeprazole”” should be replaced with “”omeprazole sulfone.””.

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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: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about In vivo metabolism of the new designer drug 1-(4-methoxyphenyl)piperazine (MeOPP) in rat and identification of the human cytochrome P450 enzymes responsible for the major metabolic step.Product Details of 56621-48-8.

The in vivo metabolism of 1-(4-methoxyphenyl)piperazine (MeOPP), a novel designer drug, was studied in male Wistar rats. MeOPP was mainly O-demethylated to 1-(4-hydroxyphenyl)piperazine (4-HO-PP) in addition to degradation of the piperazine moiety. O-demethylation, the major metabolic step, was studied with cDNA-expressed human hepatic cytochrome P 450 (CYP) enzymes in pooled human liver microsomes (pHLM) and in single donor human liver microsomes with CYP2D6 poor metabolizer genotype (PM HLM). CYP2D6 catalyzed O-demethylation with apparent Km and Vmax values of 48.34 μM and 5.44 pmol min-1 pmol-1 CYP, resp. pHLM catalyzed the monitored reaction with an apparent Km = 204.80 μM and Vmax = 127.50 pmol min-1 mg-1 protein. The CYP2D6-specific chem. inhibitor quinidine (1 and 3 μM) significantly inhibited 4-HO-PP formation by 71.9% and by 98.5%, resp., in incubation mixtures with pHLM and 200 μM MeOPP. O-demethylation was significantly lower in PM HLM compared with pHLM (70.6%). These data suggest that polymorphically expressed CYP2D6 is the enzyme mainly responsible for MeOPP O-demethylation.

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Ether – Wikipedia,
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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.Category: ethers-buliding-blocks.Amantea, Michael A.; Narang, Prem K. published the article 《Improved procedure for quantitation of omeprazole and metabolites using reversed-phase high-performance liquid chromatography》 about this compound( cas:73590-85-9 ) in Journal of Chromatography, Biomedical Applications. Keywords: omeprazole metabolite blood plasma HPLC; liquid chromatog omeprazole metabolite blood. Let’s learn more about this compound (cas:73590-85-9).

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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