Tag: 200-300

Chemical composition, phenolic content and antioxidant capacity of Haloxylon scoparium extracts was written by Haida, S.;Kribii, A.. And the article was included in South African Journal of Botany in 2020.Reference of 106-79-6 This article mentions the following:

This work is part of the valorization of the Haloxylon scoparium plant, belonging to the Chenopodiaceae family and native to southeastern of Morocco. The aim of the present work is to study the chem. composition of this plant, to estimate the phenolic compounds contents of its extracts and to evaluate their antioxidant powers. After extraction by maceration of the aerial and root part of Haloxylon scoparium, the extracts obtained are fractionated by liquid-liquid extraction using solvents of different polarities. The best extraction yield is obtained in the aerial part 23.54% against 10.99% for the root part. The anal. carried out by the coupling of gas chromatog. with mass spectrometry (GC-MS) shows that the root part contains mainly carbohydrates, however the aerial part consists mainly of alkaloids. The total polyphenol content obtained in the root part 69.86 mg/gEAG (mg/g of gallic acid) is significantly higher than that in the aerial part 56.79 mg/g EAG. The hydrolysable tannins are the predominant polyphenols of the root part of Haloxylon scoparium corresponding to 83.87 mg/g EAT (mg/g of tannic acid). The antioxidant activity of the various extracts obtained is evaluated by two methods: the DPPH (1,1-diphenyl-2-picryl hydrazyl) free radical scavenging test and the ferric reducing antioxidant power (FRAP). The examination of the inhibitory concentration values shows that the butanolic extract of the root part is the most active with values of IC₅₀ = 0.06 mg/mL and IC_0.5 = 0.19 mg/mL resp. for the DPPH and FRAP tests. The other extracts also showed a very interesting potential as antioxidants. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Reference of 106-79-6).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Reference of 106-79-6

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Fabrication of Pb²⁺ ion selective electrode based on 1-((3-((2-hydroxynaphthalen-1-yl)methyleneamino)-2,2-dimethylpropylimino) methyl) naphthalen-2-ol as new neutral ionophore was written by Ghaedi, M.;Montazerozohori, M.;Andikaey, Z.;Shokrollahi, A.;Khodadoust, S.;Behfar, M.;Sharifi, S.. And the article was included in International Journal of Electrochemical Science in 2011.Electric Literature of C12H22O4 This article mentions the following:

The potentiometric study of complexation of 1-((3-((2-hydroxynaphthalen-1-yl)methyleneamino)-2,2-dimethylpropylimino)Me) naphthalen-2-ol (HMDMN) show strong interaction between HMDMN and Pb²⁺ ion while their formation constant was evaluated using potentiometric data. The suitability of the HMDMN for construction of new Pb²⁺ ion PVC membrane electrode and its potentiometric determination was studied. The influence of variables including pH, membrane ingredients was optimized and set as PVC:DBP:carrier:NaTPB:NaTPB/carrier mole ratio with the percent mass ratio of 28.9:57.8:8.0:5.33:0.83. At optimum values of all variables the electrode response is linear in the concentration range of 1.0 鑴?10^-6 to 0.1M with detection limit 4.0 鑴?10^-7 M with Nernstian slop of 25.79 mV/decade over the pH range of 5.0-7.2. This electrode with appropriate response time 閳?0s and suitable reproducibility (relative standard deviation), can be used for at least 2 mo without any measurable divergence in response properties. The proposed sensor reveals good selectivity toward Pb²⁺ ion with respect to many alkali, alk. earth, transition and heavy metal ions. It was applied to the determination of Pb²⁺ in water and soil samples. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Electric Literature of C12H22O4).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Electric Literature of C12H22O4

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Pd-Catalyzed Regioselective Alkoxycarbonylation of 1-Alkenes Using a Lewis Acid [SnCl₂ or Ti(OⁱPr)₄] and a Phosphine was written by Amezquita-Valencia, Manuel;Achonduh, George;Alper, Howard. And the article was included in Journal of Organic Chemistry in 2015.Safety of Dimethyl decanedioate This article mentions the following:

The phosphine ligand mediated palladium catalyzed alkoxycarbonylation of alkenes was investigated with the objective of attaining good linear selectivity for the ester. The effect of various parameters such as solvents, additives, palladium precursors, CO pressures, and alkenes of various structural complexities were examined The results revealed the importance of using a Lewis acid such as SnCl₂ or Ti(OⁱPr)₄ in combination with a monodentate ligand such CYTOP 292 or P(p-anisyl)₃ to enhance the regioselectivity for the linear isomers in the range of 70-96%. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Safety of Dimethyl decanedioate).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Safety of Dimethyl decanedioate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Enolizability of S-alkyl esters of thioacetoacetic and thiomalonic acids was written by Kurgane, B.;Grinvalde, A.;Stradins, J.;Brakmane, M.;Hillers, S.. And the article was included in Zhurnal Organicheskoi Khimii in 1974.Recommanded Product: malonic acid dibutyl ester This article mentions the following:

MeCOCH2CO2R (I), MeCOCH2COSR (II), RO2CCH2CO2R (III), and RSCOCH2COSR (IV), (R = Et, CH2CH2Cl, Me2CH, PhCH2, Ph), were prepared; 6-11% I and 19-28% II were in the enol form, but III and IV existed completely in the diketo form. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Recommanded Product: malonic acid dibutyl ester).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Recommanded Product: malonic acid dibutyl ester

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Carbon nanotube composite PVC coated stainless steel disc electrode for detection of Ga(III) was written by Abbaspour, Abdolkarim;Valizadeh, Hamed;Mirahmadi, Ehsan. And the article was included in International Journal of Environmental Analytical Chemistry in 2013.HPLC of Formula: 106-79-6 This article mentions the following:

Demonstrated is the application of the composite of multi-walled carbon nanotube polyvinylchloride (MWCNT-PVC) based on Bismarck Brown R for gallium sensor. MWCNT has a role to enhance the hydrophobicity of the membrane, which leads to a more stable potential signal. In addition by applying polypyrrol on the surface of this sensor a reduction in the drift of potential occurred and equilibrium potential was achieved faster. Compared to previous studies, using a stainless steel disk instead of a wire electrode causes to obtain an easily and more homogeneous coated electrode. The sensor shows a good Nernstian slope of 19.70 鍗?.37 mV decade^-1 in a wide linear range concentration of 1.0 鑴?10^-7 to 1.0 鑴?10^-2 M of Ga(NO₃)₃. The detection limit of this electrode was 7.7 鑴?10^-8 M of Ga(NO₃)₃. This proposed sensor is applicable in a wide pH range of 2 to 8. It has a short response time of 閳? s and has a good selectivity over 24 various metal ions. The practical anal. utility of this electrode is demonstrated by measurement of Ga(III) in rock and different water samples. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6HPLC of Formula: 106-79-6).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters contain a carbonyl center, which gives rise to 120鎺?C閳ユ弲閳ユ彊 and O閳ユ弲閳ユ彊 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C閳ユ彊閳ユ弲 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. HPLC of Formula: 106-79-6

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Grafting Behavior for the Resonating Variants of Ethynylaniline on Hydrogenated Silicon (100) Surfaces under Thermal Hydrosilylation was written by Tung, Joline;Tew, Lih Shin;Coluccini, Carmine;Lin, Yue-Der;Khung, Yit Lung. And the article was included in Chemistry – A European Journal in 2018.Recommanded Product: tert-Butyl (3-ethynylphenyl)carbamate This article mentions the following:

This work reports the outcome of thermal grafting of 2-ethynylaniline, 3-ethynylaniline, and 4-ethynylaniline on a hydrogenated Si(100) surface. Using high-resolution XPS and AFM, it was found that the grafting of these compounds could be attributed to resonating structures that arise from the position of an electron-donating NH₂ group and an electron-withdrawing acetylene group. For the ortho- and para-positioned acetylene group, surface reactions were observed to proceed predominantly via the acetylene to form a Si-C bond, whereas the meta-positioned acetylene group was found to have undergone nucleophilic grafting through the NH₂ group onto the silicon surface to form a Si-N bond. Furthermore, a tert-butoxycarbonyl-protected derivative for a meta-positioned ethynylaniline was synthesized to exclusively force the reaction to react with the acetylene group and subsequent anal. confirmed that unprotected 3-ethynylaniline had indeed reacted through the nucleophilic NH₂ group as hypothesized. Thus, for the first time, the interplay between resonance structures and their effects on silicon surface modifications were systematically catalogued. In the experiment, the researchers used many compounds, for example, tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3Recommanded Product: tert-Butyl (3-ethynylphenyl)carbamate).

tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Recommanded Product: tert-Butyl (3-ethynylphenyl)carbamate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Renewable Non-Isocyanate Based Thermoplastic Polyurethanes via Polycondensation of Dimethyl Carbamate Monomers with Diols was written by Unverferth, Maike;Kreye, Oliver;Prohammer, Alexander;Meier, Michael A. R.. And the article was included in Macromolecular Rapid Communications in 2013.Quality Control of Dimethyl decanedioate This article mentions the following:

1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD)-catalyzed polycondensation reactions of fatty acid derived di-Me dicarbamates and diols are introduced as a versatile, non-isocyanate route to renewable polyurethanes. The key step for the synthesis of di-Me carbamate monomers from plant-oil-derived dicarboxylic acids is based on a sustainable base-catalyzed Lossen rearrangement. The formed polyurethanes with mol. weights up to 25 kDa are characterized by SEC, DSC, and NMR anal. via size exclusion chromatog. (SEC), differential scanning calorimetry (DSC) and NMR. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Quality Control of Dimethyl decanedioate).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Quality Control of Dimethyl decanedioate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Chemical constituents from the rhizomes of Polygonatum sibiricum Red. and anti-inflammatory activity in RAW264.7 macrophage cells was written by Zhao, Huan;Wang, Qiao-Lian;Hou, Shu-Bing;Chen, Guang. And the article was included in Natural Product Research in 2019.Reference of 1190-39-2 This article mentions the following:

Chem. investigation of the rhizomes of Polygonatum sibiricum Red. led to the identification of 27 constituents. Among them, a total of 16 compounds were obtained from Polygonatum for the first time, in which, and were also firstly isolated as natural products. Anti-inflammatory activity studies on 13 isolated compounds showed that 灏?carboline constituents, especially compounds and , significantly inhibited the expression of NO, TNF-浼? IL-6 and IL-1灏?in lipopolysaccharide (LPS)-treated RAW264.7 macrophage cells. Moreover, western blotting anal. demonstrated that compound significantly inhibited the expression of COX-2, iNOS and the activation of NF-榄廈, suggesting that 灏?carboline structures may play an important role in inhibition of NF-榄廈 signaling pathway, which thereby inhibits the production of inflammatory factors. The present research may not only help further elucidation of the anti-inflammatory mechanism of P. sibiricum Red., but also provide the potential bioactive mols. for inflammatory diseases research. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Reference of 1190-39-2).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters contain a carbonyl center, which gives rise to 120鎺?C閳ユ弲閳ユ彊 and O閳ユ弲閳ユ彊 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C閳ユ彊閳ユ弲 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Reference of 1190-39-2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthesis and properties of carbamate- and amine-containing poly(phenylacetylenes) was written by Saeed, Irfan;Khan, Fareha Zafar;Shiotsuki, Masashi;Masuda, Toshio. And the article was included in Journal of Polymer Science, Part A: Polymer Chemistry in 2009.Recommanded Product: tert-Butyl (3-ethynylphenyl)carbamate This article mentions the following:

The 3- and 4-aminophenylacetylenes protected by t-butoxycarbonyl (t-Boc) and 9-fluorenylmethoxycarbonyl (Fmoc) groups were synthesized and polymerized using [(nbd)RhCl]₂ (I) and [(nbd)Rh⁺-鐣?sup>6-PhB^–Ph₃] catalysts. The t-Boc-containing polymers were obtained in high yield (82-91%). Among the Fmoc-protected monomers, the para-derivative polymerized well [yield = 85-94%], whereas its meta-substituted analog did not afford high mol. weight polymer in good yield [yield = 10-15%]. The use of KN(SiMe₃)₂ as a cocatalyst in conjunction with I led to a dramatic increase in the mol. weight of the polymers. The acid- and base-catalyzed removal of the t-Boc and the Fmoc groups, resp., generated primary amine-containing polymers which cannot be obtained directly by the polymerization of the corresponding monomers. The solubility characteristics of the polymers bearing protected amino groups were quite different from those of the unprotected ones, the former being soluble in polar solvents, whereas the latter displayed poor solubility even in polar protic or highly polar aprotic solvents. The attempts to accomplish the free-standing membrane fabrication by solution casting were successful only for 3-(tert-butoxycarbonylamino)phenylacetylene homopolymer, and an augmentation in the gas permeability and CO₂/N₂ permselectivity was discerned in comparison with the unsubstituted poly(phenylacetylene) and poly(m-t-butyldimethylsiloxyphenylacetylene). In the experiment, the researchers used many compounds, for example, tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3Recommanded Product: tert-Butyl (3-ethynylphenyl)carbamate).

tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Recommanded Product: tert-Butyl (3-ethynylphenyl)carbamate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Theoretical and practical investigations of copper ion selective electrode with polymeric membrane based on N,N’-(2,2-dimethylpropane-1,3-diyl)-bis(dihydroxyacetophenone) was written by Ghanei-Motlagh, Masoud;Taher, Mohammad Ali;Saheb, Vahid;Fayazi, Maryam;Sheikhshoaie, Iran. And the article was included in Electrochimica Acta in 2011.Name: Dimethyl decanedioate This article mentions the following:

A novel ion-selective poly(vinyl chloride) (PVC) membrane sensor for Cu²⁺ ions based on N,N’-(2,2-dimethylpropane-1,3-diyl)-bis(dihydroxyacetophenone) (NDHA) as a new ionophore was prepared and studied. The best performance was observed for the membrane composition, including 30:65:1:4 (wt%) = PVC:DBP:KTpClPB:NDHA. The electrode showed a good Nernstian slope of 30.0 鍗?0.5 mV/decade in a wide linear range activity of 3.0 鑴?10^-7 to 1.0 鑴?10^-2 mol dm^-3 Cu(NO₃)₂ with limit of detection 2.5 鑴?10^-7. Sensor exhibited a fast response time (t _95% < 10 s) and could be used for 閳? mo in the pH range of 3.0-7.4. The proposed potentiometric sensor was found to work satisfactorily in partially nonaqueous media up to 30 (vol%) content of MeOH, EtOH and acetone. Applications of this electrode for the determination of Cu in real samples, and as an indicator electrode for potentiometric titration of Cu²⁺ ion using EDTA, are reported. To predict the extraction ability of NDHA for different metallic ions, [M(NDHA)] and [M(H₂O)₆] (M = Cu²⁺, Co²⁺, Hg²⁺, Pb²⁺, Ag⁺, Mg²⁺, Ca²⁺, Mn²⁺, Zn²⁺, Cd²⁺, K⁺ and Al³⁺) were studied using ab initio theor. calculations The metal binding capability was evaluated using the binding energy. Results of the authors’ study could be useful for prediction of the extraction power of this Schiff base and could play a guiding role in planning experiments In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Name: Dimethyl decanedioate).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Name: Dimethyl decanedioate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics