Tag: M.W:100-200

Recommanded Product: 1,10-Phenanthroline. 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: 1,10-Phenanthroline, is researched, Molecular C12H8N2, CAS is 66-71-7, about Micro-/Mesoporous Fluorescent Polymers and Devices for Visual Pesticide Detection with Portability, High Sensitivity, and Ultrafast Response.

The excess residue of pesticides in crops, soil, and water continues to be a widespread concern due to the threat to human health and food safety. With the aim to develop highly sensitive sensing materials and portable detection devices, two dicarbazole-based fluorescent micro-/mesoporous polymers (JYs) with a larger sp. surface area and pore sizes ranging from 1.1 to 34.2 nm are synthesized. The Stern-Volmer constants of JY fluorescence quenching for imidacloprid (50,063 M-1) exceed 23-51 times those of the reported porous organic polymers (980-2173 M-1). Of particular interest is the observation that JYs show rapid fluorescence response (2 s) and ultralow detection limit (30 ppb) for imidacloprid in water medium. The pronounced chemsensing property is attributed to the synergistic role of the hierarchical pore structure, large π-conjugation of chromophore groups, and strong inner filter effect between the polymer and imidacloprid mol. Moreover, the pesticide detection of JYs exhibits good interference resistance in complicated service environments such as the extract liquids of the apple peel and field soil as well as aqueous solutions of various cations and anions. Because of the portability, excellent reusability, and sensitive fluorescence response, the prepared JYs and detection devices have promising applications in the on-site monitoring and early warning of the pesticide residues.

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

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, N.I.H., Extramural, Research Support, Non-U.S. Gov’t, Research Support, U.S. Gov’t, Non-P.H.S., Journal of the American Chemical Society called Intermolecular Hydroamination of 1,3-Dienes To Generate Homoallylic Amines, Author is Yang, Xiao-Hui; Lu, Alexander; Dong, Vy M., which mentions a compound: 2343-22-8, SMILESS is FC1=CC2=C(NCC2)C=C1, Molecular C8H8FN, Category: piperazines.

Authors report a Rh-catalyzed hydroamination of 1,3-dienes to generate homoallylic amines. The work show-cases the first case of anti-Markovnikov selectivity in the intermol. coupling of amines and 1,3-dienes. By tuning the ligand properties and Bronsted acid additive, it was found that a combination of rac-BINAP and mandelic acid is critical for achieving anti-Markovnikov selectivity.

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

Quality Control of (S)-1-(Dimethylamino)propan-2-ol. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-1-(Dimethylamino)propan-2-ol, is researched, Molecular C5H13NO, CAS is 53636-17-2, about Fluoride ion-catalyzed reduction of aldehydes and ketones with hydrosilanes. Synthetic and mechanistic aspects and an application to the threo-directed reduction of α-substituted alkanones. Author is Fujita, Makoto; Hiyama, Tamejiro.

Reduction of aldehydes and ketones with hydrosilanes proceeded in the presence of a catalytic amount of Bu4NF or tris(diethylamino)sulfonium difluorotrimethylsilicate in aprotic polar solvents under mild conditions. A significant isotope effect (kH/kD = 1.50) was observed in competitive reduction of acetophenone with HSiMe2Ph and DSiMe2Ph. The reaction was first order in the concentration of HMPA. Reduction of 2-methylcyclohexanone gave cis-2-methylcyclohexanol with selectivities up to 95%. The kinetic and stereochem. results suggest that a hexavalent fluorosilicate [HSiR3F(HMPA)]- is involved. α-Alkoxy (acyloxy or dimethylamino) ketones were transformed to threo alcs. in high diastereoselectivities. The reduction was also applied to α-methyl-β-oxo amides, RCOCHMeCONR12, to afford the corresponding threo alcs. in >98% selectivity. The threo selectivity is explained in terms of the Felkin-Anh model in which interaction of carbonyl oxygen with a countercation is ideally suppressed. The threo-directed reduction was applied to (R)-1-phenyl-4-(2-tetrahydropyranyloxy)-1-penten-3-one and N-(2-benzoylpropanoyl)piperidine. The resulting threo alcs. were resp. converted into (2R,3S)-2,3-(cyclohexylidenedioxy)butanal, a key intermediate of daunosamine synthesis, and into a pharmacol. useful compound, threo-N-(3-hydroxy-2-methyl-3-phenylpropyl)piperidine.

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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: 1,10-Phenanthroline, is researched, Molecular C12H8N2, CAS is 66-71-7, about Nano cadmium(II)-benzyl benzothiazol-2-ylcarbamodithioate complexes: Synthesis, characterization, anti-cancer and antibacterial studies.Name: 1,10-Phenanthroline.

Benzyl benzothiazol-2-ylcarbamodithioate (BBCT) was used as a ligand for the synthesis of [Cd(BBCT)(PPh3)Cl]Cl (1), [Cd2(BBCT)2(μ-dppm)2]Cl4 (2), or [Cd(BBCT)(phosphine)]Cl2 (where phosphine is dppe (3), dppp (4), dppb (5)) and [Cd(BBCT)(amine)]Cl2 (where amine is bipy (6) or phen (7)). The characterizations (molar conductivity, elemental anal., IR spectra and 31P NMR, 1H NMR and 13C NMR spectra) prove that BBCT ligand behaves as a bidentate ligand through the N atom of thiazole ring group and S atom of thion group while the phosphines or amines ligands behave as bidentate ligand through the P atoms or N atoms, resp. Furthermore, the nanostructure of (1) and (7) was examined by SEM and the results demonstrate the presence of regular nanostructures. The complex (1) shows fiber-grip-like geometry with 85-110 nm while complex (7) shows spiny-flowers-like nanostructures with the flower-forming spines within the range of 80-190 nm. The antibacterial activity of the complexes (1, 2, 3, 6, 7) against S.Epidermidis, S. aureus (gram-pos.) and C.Freundii (gram-neg.) was examined using amikacin as a pos. control. However, all the complexes showed a high ability to inhibit the bacterial species studied, and the inhibition zone was better than that obtained with amikacin. Moreover, the anti-cancer activity of the complexes (1) and (7) against ovarian cancer cell was studied and the results show that both complexes gave cell viability values less than 6%.

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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)-1-(Dimethylamino)propan-2-ol, is researched, Molecular C5H13NO, CAS is 53636-17-2, about Gas chromatographic separation of some enantiomers on optically active copper(II) complexes.Synthetic Route of C5H13NO.

Gas chromatog. separation of optically active amino alcs., amines, amino esters, and alcs. was achieved using optically active Cu(II) complexes. The binuclear Cu(II) complex of either (R)-2-(salicylidenamino)-1,1-bis(5-tert-butyl-2-octyloxyphenyl)propan-1-ol or (S)-2-(salicylidenamino)-1,1-diphenylpropan-1-ol was incorporated into the stationary phase on both capillary and packed columns. Separation results for 13 compounds, using the carrier gas, are tabulated. Trimethylsilylation decreased the separation of amino alc. enantiomers, and acylation destroyed it entirely.

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

Kluson, Petr; Stavarek, Petr; Penkavova, Vera; Vychodilova, Hana; Hejda, Stanislav; Bendova, Magdalena published an article about the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0,SMILESS:C[C@H](O)CC(OC)=O ).Recommanded Product: (S)-Methyl 3-hydroxybutanoate. 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.

Homogeneous asym. catalysts represented by organometallics of transition elements reveal very high activity and stereoselectivity in asym. hydrogenation of β-ketoesters. Recently, it appeared efficient to use ionic liquids of the [NR222][Tf2N] type for accommodation of the chiral catalytic complex. Even on the industrial scale it is becoming attractive to carry out hydrogenations with such immobilized complexes in a continuous regime in microreactors. Attention was paid to the stereoselective hydrogenation of methylacetoacetate (MAA) to isomeric (R)-(+) or (S)-(-)-methyl-3-hydroxybutanoates over a chiral ([RuCl((R)-BINAP)(p-cymene)]Cl) complex immobilized in the mixed [N8222][Tf2N]/methanol/water solvent phase, and performed inside of a microfluidic chip reactor. It was shown that the reaction could be successfully carried out in such an arrangement with a very high enantioselectivity (above 99%) and at very high conversion of MAA (above 97%). It was proven that the participation of a specific solvent (methanol or the mixture [N8222][Tf2N]/methanol/water) essentially influences the mechanism of the reaction. The solvents actively participate in the re-coordination of the catalytic complex in a series of reactions which is reflected in the values of reaction enthalpies. The specific process output was also evaluated.

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

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: 66-71-7, is researched, Molecular C12H8N2, about Design, Synthesis, Bioanalytical, Photophysical and Chemo-phototherapeutic Studies of Heteroleptic Cu(II) Complexes, the main research direction is copper complex thermodn property anticancer mol docking.Product Details of 66-71-7.

A broad investigation has been paid to design an alternative metal-based anticancer drug, bearing metal ions other than platinum, with more target specificity. In this regard, Cu(II) complexes showed a remarkable intercalation binding property with DNA which have received much attention in the development of efficient anticancer drugs. A series of mononuclear ternary Cu(II) complexes A, B and C were prepared with H2L and auxiliary ligand. The synthesized H2L and corresponding complexes were characterized using various electroanal. and physicochem. techniques. The thermodn. parameters were calculated using Gibb′s-Helmholtz, Arrhenius and Eyring equations. Morphol., binding energies of core electrons and crystallog. nature of the metal complexes were evaluated by SEM, XPS and PXRD techniques. Binding studies of the metal complexes with CT-DNA were conducted by absorption, fluorescence and viscometric methods. The pBR322 cleavage, antioxidant and mol. docking studies revealed the potent biol. activity of title complexes. In-vitro cytotoxicity of these biol. active biomaterials tested against HeLa and MCF-7 by MTT assay and DAPI staining revealed their anticancer activity. Such results are supportive for advanced studies which would come through insight for their possible applications.

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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 Challenging the scope of continuous, gas-phase reactions with supported ionic liquid phase (SILP) catalysts-Asymmetric hydrogenation of methyl acetoacetate.Quality Control of (S)-Methyl 3-hydroxybutanoate.

A supported ionic liquid phase (SILP) catalyst was tested in continuous gas phase asym. hydrogenation of Me acetoacetate (MAA); the catalyst is dibromo[3-(2,5-(2R,5R)-dimethylphospholanyl-1)-4-di-o-tolylphosphino-2,5-dimethylthiophene] ruthenium (RuLBr2). The ionic liquid is 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide [EMIMNTf2].

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

Electric Literature of C12H8N2. 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 Structure-Activity Studies Reveal Scope for Optimisation of Ebselen-Type Inhibition of SARS-CoV-2 Main Protease. Author is Thun-Hohenstein, Siegfried T. D.; Suits, Timothy F.; Malla, Tika R.; Tumber, Anthony; Brewitz, Lennart; Choudhry, Hani; Salah, Eidarus; Schofield, Christopher J..

The reactive organoselenium compound ebselen is being investigated for treatment of coronavirus disease 2019 (COVID-19) and other diseases. We report structure-activity studies on sulfur analogs of ebselen with the Severe Acute Respiratory Syndrome coronavirus 2 (SARS-CoV-2) main protease (Mpro), employing turnover and protein-observed mass spectrometry-based assays. The results reveal scope for optimization of ebselen/ebselen derivative- mediated inhibition of Mpro, particularly with respect to improved selectivity.

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

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.Banno, Taisuke; Kawada, Kazuo; Matsumura, Shuichi researched the compound: (S)-1-(Dimethylamino)propan-2-ol( cas:53636-17-2 ).Safety of (S)-1-(Dimethylamino)propan-2-ol.They published the article 《Chemo-enzymatic synthesis and properties of novel optically active cationics containing carbonate linkages》 about this compound( cas:53636-17-2 ) in Journal of Oleo Science. Keywords: carbonate type cationic synthesis enzyme. We’ll tell you more about this compound (cas:53636-17-2).

Novel optically active carbonate-type cationics were designed and synthesized via a green method. A series of n-alkyl N,N-dimethylaminoalkyl carbonates was prepared via a two-step successive carbonate exchange reaction of di-Ph carbonate with 1-alkanol followed by the reaction of the optically active or racemic amino alc. in the presence of triethylamine. The quaternarization of the N,N-dimethylamino group was carried out using Me iodide. Furthermore, optically active cationics were prepared by the lipase-catalyzed enantioselective hydrolysis of the racemic cationics. Carbonate-type cationics having an isopropylene linkage showed high hydrolytic stability. They exhibited surfactant properties similar to those of the corresponding racemic cationics. Although no significant differences in the antimicrobial activities were observed owing to the stereochem. of the cationics, the biodegradability was strongly influenced by the stereochem. Some optically active cationics were rapidly biodegraded by activated sludge.

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