Tag: M.W:100-200

Related Products of 66-71-7. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1,10-Phenanthroline, is researched, Molecular C12H8N2, CAS is 66-71-7, about Heteroleptic copper(II) complexes of prenylated flavonoid osajin behave as selective and effective antiproliferative and anti-inflammatory agents. Author is Vanco, Jan; Travnicek, Zdenek; Hosek, Jan; Dvorak, Zdenek.

Heteroleptic copper(II) complexes, containing prenylated flavonoid osajin isolated from the fruits of Maclura pomifera Schneid., were prepared and thoroughly characterized, including single crystal X-ray anal. Some of the following complexes of the general composition [Cu(L)(bpy)]NO3 (1), [Cu(L)(dimebpy)]NO3·2MeOH (2) [Cu(L)(phen)]NO3·H2O (3), [Cu(L)(bphen)]NO3 (4) and [Cu(L)(dppz)]NO3 (5), where HL stands for 3-(4-hydroxyphenyl)-5-hydroxy-8,8-dimethyl-6-(3-methylbut-2-ene-1-yl)-4H,8H-benzo[1,2-b:3,4-b′]dipyran-4-one (osajin), bpy = 2,2′-bipyridine, dimebpy = 4,4′-dimethyl-2,2′-bipyridine, phen = 1,10-phenanthroline, bphen = 4,7-diphenyl-1,10-phenanthroline and dppz = dipyrido[3,2-a:2′,3′-c]phenazine, were also monitored for their solution stability and interactions with cysteine and glutathione by mass spectrometry. The in vitro cytotoxicity of the complexes was evaluated against a panel of eight human cancer cell lines: (MCF-7, HOS, A549, PC-3, A2780, A2780R, Caco-2, and THP-1). The results revealed high antiproliferative activity of the complexes with the best IC50 values of 0.5-3.4 μM for complexes (4) and (5), containing the bulkier N,N′-donor ligands (bphen, and dppz, resp.). The complexes also revealed a relatively low toxicity towards human hepatocytes (IC50 values are higher than 100 μM in some cases), and thus proved to be highly selective towards the cancer cells. On the other hand, the complexes showed a strong in vitro nuclease effect using the model pUC-19 plasmid. In the model of lipopolysaccharide-stimulated (LPS) THP-1 monocytes, the complexes revealed ability to lower the activity of nuclear factor kappa-B/activator protein 1 (NF-κB /AP-1) system and decrease the secretion of tumor necrosis factor alpha (TNF-α). Thus, the complexes have been identified as strong antiproliferative and anti-inflammatory compounds

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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

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: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Ligand-acceleration by a chiral modifier in the enantioselective hydrogenation of methyl acetoacetate on a Raney nickel catalyst: effect of a modifier configuration.Recommanded Product: 53562-86-0.

Reaction rate and enantioselectivity of asym. hydrogenation of Me acetoacetate were studied over Raneynickel catalysts modified with (R,R)-tartaric acid, malic acid, or succinic acid to reveal the impacts of the modifier configuration. Catalysts comodified with two different acids were also examined to confirm the conclusions. From anal. of the enantiomer ratio of the hydrogenation product and initial reaction rate, tartaric acid (TA) was found to have dual functions as the modifier during the hydrogenation; effective suppression of the racemic catalysis on bare Ni surface and extensive enantiodifferentiating ligand acceleration by adsorbed TA. It was demonstrated that each adsorbed chiral modifier mol. independently takes part in the enantiospecific hydrogenation.

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Ema, Tadashi; Sugiyama, Yasushi; Fukumoto, Minoru; Moriya, Hiroyuki; Cui, Jing-Nan; Sakai, Takashi; Utaka, Masanori published an article about the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0,SMILESS:C[C@H](O)CC(OC)=O ).Category: piperazines. 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:53562-86-0) through the article.

An NADPH-dependent reductase that shows reducing activity for 1-chloro-2-hexanone has been purified from bakers’ yeast. SDS-PAGE and gel filtration suggested that the purified reductase is a monomeric enzyme with a mol. weight of ca. 37 kDa. Asym. reduction of several carbonyl compounds using the purified reductase has been carried out. 1-Chloro-2-hexanone, 1-acetoxy-2-heptanone, Me acetoacetate, Et pyruvate, 1-chloro-2,4-pentanedione, and 2,4-hexanedione were reduced to the corresponding alcs. with high enantiomeric purities (>98% ee). The reductase showed high specificity constants (kcat/Km = 103-105 s-1 M-1) and relatively low Michaelis constants (Km = 10-4-10-3 M) for all the substrates examined

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Piperazine – Wikipedia,
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Kemmochi, Marin; Miyamoto, Yusuke; Sumida, Yuto; Ohmiya, Hirohisa published the article 《Direct Photoexcitation of Borate Enabling Minisci Reaction》. Keywords: borate enabling Minisci reaction direct photoexcitation.They researched the compound: 1,10-Phenanthroline( cas:66-71-7 ).Application of 66-71-7. 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:66-71-7) here.

The photoexcitable borate enabling Minisci C-H alkylation of heteroarene has been described. This protocol using alkylborate only needed O2 and visible light, which provides a considerably clean system. The direct photoexcitation of alkylborate allowed the generation of tertiary, secondary, and primary-alkyl radical including Me radical. This light-driven Minisci reaction gave a choice for the functionalization of heteroarenes.

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Safety of (S)-Methyl 3-hydroxybutanoate. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Highly Effective Chiral Ortho-Substituted BINAPO Ligands (o-BINAPO): Applications in Ru-Catalyzed Asymmetric Hydrogenations of β-Aryl-Substituted β-(Acylamino)acrylates and β-Keto Esters. Author is Zhou, Yong-Gui; Tang, Wenjun; Wang, Wen-Bo; Li, Wenge; Zhang, Xumu.

A novel family of chiral ortho-substituted BINAPO ligands (o-BINAPO) I (R = H, Me, Ph, 3,5-Me2C6H3; R1 = Ph, 3,5-Me2C6H3) were prepared from the corresponding binaphthols and diarylchlorophosphines; complexes of I with [(p-cymene)RuCl2]2 were highly efficient catalysts for asym. hydrogenation of β-aryl-substituted β-(acylamino)acrylates R2C(AcNH):CHCO2R3 (R2 = Ph, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-MeC6H4, 4-MeOC6H4, 2-MeC6H4, 2-MeOC6H4; R3 = Me, Et) and β-aryl-substituted β-keto esters R4COCH2CO2R5 (R4 = Ph, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-MeC6H4, 4-MeOC6H4, 2-MeC6H4, 2-MeOC6H4, Me, ClCH2; R5 = Me, Et) to give nonracemic β-amino acid esters R2CH(NHAc)CH2CO2R3 (R2 = Ph, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-MeC6H4, 4-MeOC6H4, 2-MeC6H4, 2-MeOC6H4; R3 = Me, Et) and β-hydroxy esters R4CH(OH)CH2CO2R5 (R4 = Ph, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-MeC6H4, 4-MeOC6H4, 2-MeC6H4, 2-MeOC6H4, Me, ClCH2; R5 = Me, Et). While most asym. hydrogenation catalysts are effective only with single stereoisomers of β-amidoesters, hydrogenation catalysts prepared from I and [(p-cymene)RuCl2]2 hydrogenated E/Z mixture of β-aryl-substituted β-(acylamino)acrylates enantioselectively to give β-(acetylamino)esters in high enantiomeric excesses. E.g., Me 3-phenyl-3-acetylamino-2-propenoate PhC:NHAcCHCO2Me (prepared from Me 3-phenyl-3-oxopropanoate by addition of ammonium acetate, precipitation, and acylation with acetic anhydride) undergoes enantioselective hydrogenation in ethanol at 80 psi and 50° in the presence of a ruthenium catalyst prepared from I (R = 3,5-Me2C6H3; R1 = Ph) and [(p-cymene)RuCl2]2 to give PhCH(NHAc)CH2CO2Me in 99% ee.

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Related Products of 53636-17-2. 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: (S)-1-(Dimethylamino)propan-2-ol, is researched, Molecular C5H13NO, CAS is 53636-17-2, about Chirality sensing of choline derivatives by a triple anion helicate cage through induced circular dichroism. Author is Zuo, Wei; Huang, Zhe; Zhao, Yanxia; Xu, Wenhua; Liu, Zhihua; Yang, Xiao-Juan; Jia, Chuandong; Wu, Biao.

Chirality sensing of choline derivatives is achieved by a self-assembled, racemic triple anion helicate cage which exhibits induced CD (ICD) upon encapsulation of a chiral guest. The host-guest interactions were illustrated by NMR, crystal structure, CD and DFT calculations The absolute configurations and ee values were determined by ICD.

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SDS of cas: 53562-86-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Influence of Synthesis Conditions on the Structure of Nickel Nanoparticles and their Reactivity in Selective Asymmetric Hydrogenation. Author is Arrigo, Rosa; Gallarati, Simone; Schuster, Manfred E.; Seymour, Jake M.; Gianolio, Diego; da Silva, Ivan; Callison, June; Feng, Haosheng; Proctor, John E.; Ferrer, Pilar; Venturini, Federica; Grinter, David; Held, Georg.

Unsupported and SiO2-supported Ni nanoparticles (NPs) were synthesized via hot-injection colloidal route using oleylamine (OAm) and trioctylphosphine (TOP) as reducing and protective agents, resp. By adopting a multi-length scale(coating process) structural characterization, it was found that by changing equivalent of OAm and TOP not only the size of the nanoparticles is affected but also the Ni electronic structure. The synthesized NPs were modified with (R,R)-tartaric acid (TA) and investigated in the asym. hydrogenation of Me acetoacetate to chiral methyl-3-hydroxy butyrate. The comparative anal. of structure and catalytic performance for the synthesized catalysts has enabled us to identify a Ni metallic active surface, whereby the activity increases with the size of the metallic domains. Conversely, at the high conversion obtained for the unsupported NPs there was no impact of particle size on the selectivity. (R)-selectivity was very high only on catalysts containing pos. charged Ni species such as over the SiO2-supported NiO NPs. This work shows that the chiral modification of metallic Ni NPs with TA is insufficient to maintain high selectivity towards the (R)-enantiomer at long reaction times and provides guidance for the engineering of long-term stable enantioselective catalysts.

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Quality Control of 1,10-Phenanthroline. 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: 1,10-Phenanthroline, is researched, Molecular C12H8N2, CAS is 66-71-7, about Smartphone-based colorimetric method for determining sulfites in wine using a universal clamp sample holder and microfluidic cotton swab-based analytical device. Author is Khamkhajorn, Chutikarn; Pencharee, Somkid; Jakmunee, Jaroon; Youngvises, Napaporn.

A universal clamp sample holder was newly designed and fabricated for use with a microfluidic cotton swab-based anal. device (μCSAD) in smartphone-based colorimetric determination of sulfites in wine. In the process, sulfite (SO2-3) was converted to volatile SO2 by acidification, the SO2 reduced Fe(III) to Fe(II) which finally formed the complex of Fe(II)-phenanthroline with a red color. The latter two reactions occurred on a cotton swab head hanging over the sample solution in a vial. Then, the swab was placed in the sample holder that also contained a lens and a light-emitting diode, to be photographed by the built-in camera of the smartphone. A mobile software application was designed to generate the calibration equation and evaluate the amount of sulfites in the sample. The linear ranges were 0.30-2.25 as SO2 (R2 = 0.9931) and 2.25-18.75 mg L-1 as SO2 (R2 = 0.9956). The limit of detection was 100μg L-1. Compared to the Ripper method, the developed method showed no significant differences in measuring the sulfites in wine samples. This μCSAD is simple, cost-effectiveness, and eco-friendly. Moreover, the designed universal clamp holder and the software application can be used with multiple brands and models of smartphones.

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Bilginer, Sinan; Bardaweel, Sanaa K.; Sabbah, Dima A.; Gul, Halise Inci published the article 《Docking Studies and Antiproliferative Activities of 6-(3-aryl-2-propenoyl)-2(3H)- benzoxazolone Derivatives as Novel Inhibitors of Phosphatidylinositol 3-Kinase (PI3Kα)》. Keywords: aryl propenoyl benzoxazolone preparation antiproliferative antitumor agent apoptosis; LDH; Molecular docking; PI3Kα; apoptosis; chalcone; colon cancer.They researched the compound: 6-Acetylbenzo[d]oxazol-2(3H)-one( cas:54903-09-2 ).Name: 6-Acetylbenzo[d]oxazol-2(3H)-one. 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:54903-09-2) here.

Cancer is a life-threatening group of diseases and universally, the second main cause of death. The design and development of new scaffolds targeting selective cancer cells are considered a promising goal for cancer treatment. Aims and Objective: Chalcone derivatives; 6-(3-aryl-2-propenoyl)-2(3H)-benzoxazolone, were previously prepared and evaluated against the oral cavity squamous cell carcinoma cell line, HSC-2, and were reported to have remarkably high tumor selectivity. The aim of this study was to further investigate the anticancer activities of the chalcone derivatives against human colon cancer cells with a possible elucidation of their mechanism of action. Computational studies were conducted to explore the potential interaction of the synthesized mols. with the phosphatidylinositol-4,5-bisphosphate 3-kinaseα (PI3Kα). Biol. evaluation of the antiproliferative activities associated with compounds was carried out against the colon cancer cell line, HCT116. Lactate Dehydrogenase (LDH) activity was measured to study necrosis, while the caspase-3 activation and DNA measurements were used to evaluate apoptosis in the treated cells. Glide studies against PI3Kα kinase domain demonstrated that the 6-(3-aryl-2-propenoyl)-2(3H)- benzoxazolone scaffold forms H-bond with K802, Y836, E849, V851, N853, Q859, and D933, and it fits the fingerprint of PI3Kα active inhibitors. Biol. evaluation of the reported compounds in HCT116 cell line confirmed that the series inhibited PI3Kα activity and induced apoptosis via activation of caspase-3 and reduction of DNA content. The recently developed compounds might be employed as lead structures for the design of new antitumor drugs targeting PI3Kα.

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SDS of cas: 54903-09-2. 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: 6-Acetylbenzo[d]oxazol-2(3H)-one, is researched, Molecular C9H7NO3, CAS is 54903-09-2, about Synthesis of some novel benzoxazolinonylcarboxamides as potential anti-inflammatory agents. Author is Messaoud, Liacha; Wassila, Yahia; Khemissi, Seddiki; Yasmina, Adjeroud; Hanane, Chabane.

The synthesis of 2(3H)-benzoxazolinonylcarboxamide derivatives I (R = H, CH3) starting from 2-amino-4,6-dimethylpyridine and substituted (benzoxazolinon-6-yl)carboxylic acids II, which were designed as anti-inflammatory agents is described. The II were obtained by Friedel-Crafts acylation of 2(3H)-benzoxazolone derivatives with oxalyl chloride and acetylchloride in the presence of the AlCl3-DMF complex.

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