Tag: 200-300

Kinetics of the esterification of benzoic acid with n-octyl and isooctyl alcohols in the presence of phosphotungstic acid as a catalyst was written by Lachowska, Maria;Zbigniew Sadlowski, Jan;Skrzypek, Jerzy. And the article was included in Inzynieria Chemiczna i Procesowa in 2002.Safety of 2-Ethylhexyl benzoate The following contents are mentioned in the article:

The kinetics anal. of the esterification of benzoic acid with n-octyl and isooctyl alcs. in the presence of phosphotungstic acid as a catalyst, in an exptl. isothermal semibatch reactor was studied. The reaction appears to be of the first order with respect to benzoic acid and does not depend on the concentration of octyl alcs. The kinetic parameters were determined This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Safety of 2-Ethylhexyl benzoate).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C 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. Safety of 2-Ethylhexyl benzoate

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

Preparation of (2E,6E)-10,11-dihydrofarnesol via a (bisphenyl)dithioacetal reduction was written by Mechelke, Mark F.;Wiemer, David F.. And the article was included in Tetrahedron Letters in 1998.Recommanded Product: (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate The following contents are mentioned in the article:

Reduction of (bisphenyl)dithioacetal, (E,E)- Me₂CHCH₂C(SPh)₂CH₂CMe:CH(CH₂)₂CMe:CHCH₂OH, with sodium/isopropyl alc. in THF allows preparation of (2E,6E)-10,11-dihydrofarnesol, Me₂CH(CH₂)₃CMe:CH(CH₂)₂CMe:CHCH₂OH, in high yield. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Recommanded Product: (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) 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. 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: (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate

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

Intramolecular Formal oxa-[3 + 3] Cycloaddition Approach to the ABD System of Phomactin A was written by Cole, Kevin P.;Hsung, Richard P.. And the article was included in Organic Letters in 2003.Related Products of 37905-02-5 The following contents are mentioned in the article:

The ABD-ring I of phomactin A was synthesized using an intramol. formal oxa-[3 + 3] cycloaddition of an α,β-unsaturated iminium salt tethered to a 1,3-diketone. This represents the first time that the 12-membered ring has been formed simultaneously with the 1-oxadecalin and should afford a facile route to the challenging structure of phomactin A. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Related Products of 37905-02-5).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 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.Related Products of 37905-02-5

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

Imidazolium-Catalyzed Formation of Bisphenol A Polycarbonate with a Reduced Level of Branching was written by Tay, Boonying;van Meurs, Martin;Tan, Jozel;Ye, Suming;Borgna, Armando;van Herk, Alexander M.;Selvaratnam, Selvasothi;Wang, Cun;Taniguchi, Shohei;Suzuki, Yousuke;Utsunomiya, Masaru;Ito, Mitsunobu;Monden, Toshiki;Shibata, Hiroki;Tomita, Shohei. And the article was included in Industrial & Engineering Chemistry Research in 2021.Electric Literature of C13H10O3 The following contents are mentioned in the article:

The melt-phase polymerization of bisphenol A (BPA) and di-Ph carbonate (DPC) catalyzed by alk. metal catalysts produces polycarbonates with high branching, which impairs the product’s properties during weather resistance, ductility, and rheol. The use of an imidazolium-type catalyst can result in a reduced amount of branching relative to the benchmark Cs₂CO₃ catalyst. Modification of the imidazolium structure, especially by introducing a substitution at the C2 position, definitely improves the catalyst performance in enhancing the catalyst stability and reducing the branching level in the polycarbonate product. For the best catalyst identified (1,3-Ad₂-2-Ph-Im-BPA), we have shown that at a DPC/BPA ratio of 1.075 and a catalyst loading of 7 ppm, the specifications can be met at the laboratory scale: polymerization time = 125 min, M_n = 11.0 K, OH = 660 ppm, branching = 460 ppm (âˆ?5% reduction relative to the Cs₂CO₃ benchmark), and yellowness index = 6.3. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Electric Literature of C13H10O3).

Diphenyl carbonate (cas: 102-09-0) 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. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Electric Literature of C13H10O3

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

A Facile Route to Prepare PbZr Nanocomposite Catalysts for the Efficient Synthesis of Diphenyl Carbonate was written by Wang, Songlin;Jiang, Nan;Liang, Lei;Niu, Hongying;Chen, Tong;Wang, Gongying. And the article was included in Catalysis Letters in 2021.Application In Synthesis of Diphenyl carbonate The following contents are mentioned in the article:

Di-Ph carbonate is a versatile chem. intermediate and key building block for the synthesis of polycarbonates. A facile route to prepare PbZr nanocomposites were developed using different precipitants to investigate the effect on the catalytic activity of the solid acid catalysts. The structure-performance relationship of the nanocomposites, dispersion of active components and structure stability, and the catalytic performance were thoroughly analyzed. The results showed that there existed the interaction between Zr and Pb, which induced the homogenous dispersion of Pb and high surface acid sites that could enhance the catalytic activities. Among the catalysts, PbZr-NH₄OH represented the best catalytic performance and superior stability, indicating that NH₄OH was more favorable compared with sodium hydroxide, ammonium carbonate and urea. The research provides a valuable reference in a wide range application of nanocomposite preparation for the effective and clean production of various carbonates. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Application In Synthesis of Diphenyl carbonate).

Diphenyl carbonate (cas: 102-09-0) 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° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C 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. Application In Synthesis of Diphenyl carbonate

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

Coherent Spin Precession and Lifetime-Limited Spin Dephasing in CsPbBr₃ Perovskite Nanocrystals was written by Crane, Matthew J.;Jacoby, Laura M.;Cohen, Theodore A.;Huang, Yunping;Luscombe, Christine K.;Gamelin, Daniel R.. And the article was included in Nano Letters in 2020.Product Details of 3063-94-3 The following contents are mentioned in the article:

Carrier spins in semiconductor nanocrystals are promising candidates for quantum information processing. Using a combination of time-resolved Faraday rotation and photoluminescence spectroscopies, we demonstrate optical spin polarization and coherent spin precession in colloidal CsPbBr₃ nanocrystals that persists up to room temperature By suppressing the influence of inhomogeneous hyperfine fields with a small applied magnetic field, we demonstrate inhomogeneous hole transverse spin-dephasing times (T₂^*) that approach the nanocrystal photoluminescence lifetime, such that nearly all emitted photons derive from coherent hole spins. Thermally activated LO phonons drive addnl. spin dephasing at elevated temperatures, but coherent spin precession is still observed at room temperature These data reveal several major distinctions between spins in nanocrystalline and bulk CsPbBr₃ and open the door for using metal-halide perovskite nanocrystals in spin-based quantum technologies. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Product Details of 3063-94-3).

1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3) 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. 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.Product Details of 3063-94-3

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

Untargeted metabolomics analysis of different grape varieties and different parts of wine grape using gas chromatography and mass spectrometry technique was written by Wang, Yali;Yang, Lu;Zhang, Ke;Chen, Xiaoxiang;Wang, Hangyu;Cheng, Ping;Wang, Jinhui. And the article was included in Journal of Biobased Materials and Bioenergy in 2021.SDS of cas: 5444-75-7 The following contents are mentioned in the article:

Natural active compounds are an important key to the development and utilization of functional foods and medicine. In this study, the chem. diversity and varietal differences of wine grape were studied by using the untargeted metabolomics method based on gas chromatog.-mass spectrometry (GC-MS), and the secondary metabolites of different cultivars and different parts were analyzed. A GC-MS-based metabolomic approach and chemometrics tools was used to identify potential active compounds in Vitis vinifera. The results showed that the content of active compounds in red wine varieties was higher than that in white wine varieties, and the content of active ingredients in grape seeds was significantly higher than that in fruits. In conclusion, this study analyzed the metabolite composition and differentiation of different wine grape fruits in Turpan as a whole, and is expected to lay a foundation for the study of wine grape and to provide a theor. basis for development and utilization of the Dietary supplement and medicine on them. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7SDS of cas: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.SDS of cas: 5444-75-7

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

One-Pot Nonisocyanate Synthesis of Sequence-Controlled Poly(hydroxy urethane)s from a Bis(six-membered cyclic carbonate) and Two Different Diamines was written by Ousaka, Naoki;Endo, Takeshi. And the article was included in Macromolecules (Washington, DC, United States) in 2021.Application In Synthesis of Diphenyl carbonate The following contents are mentioned in the article:

Sequence-controlled synthetic polymers have received increasing interest because of their great potential to develop next-generation functional materials. Here, we report a facile synthesis of a sym. spiro bis(six-membered cyclic carbonate), 2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-dione (1), its reactivity, and a one-pot, nonisocyanate synthesis of sequence-controlled poly(hydroxy urethane)s (PHUs) from 1 with two different sym. diamines. The second-order rate constant for the ring-opening addition reaction of one of the two cyclic carbonates of 1 with 1-hexylamine is two orders of magnitude larger than that of the remaining one of the resulting intermediate due to a remarkable difference between their ring strain energies. This difference in the reactivity enables the selective formation of a diurethane-linked bis(six-membered cyclic carbonate) from the reaction of 1 with a diamine (0.5 equiv). The subsequent addition of a different diamine (0.5 equiv) to the same pot affords sequence-controlled PHUs with an ABAC sequence. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Application In Synthesis of Diphenyl carbonate).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. 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.Application In Synthesis of Diphenyl carbonate

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

Modifications of Kyoho grape berry quality under long-term NaCl treatment was written by Li, Xiao-Ling;Wang, Chun-Rong;Li, Xiao-Yang;Yao, Yu-Xin;Hao, Yu-Jin. And the article was included in Food Chemistry in 2013.Electric Literature of C15H22O2 The following contents are mentioned in the article:

Different concentrations of a sodium chloride spray were applied to the grapevine cultivar Kyoho to determine the effects of salinity on berry quality. The fruit’s fresh weight, relative water content, hardness and titratable acid were gradually enhanced with increased salt concentrations Anthocyanin and soluble solids increased after treatment with moderate salinity (20 and 60 mM); however, the results were reversed under high salinity (100 and 150 mM). The soluble sugars glucose, fructose and sucrose increased after treatment with moderate salinity, whereas glucose and fructose declined under high salinity. For the six organic acids tested, their total levels were elevated by salinity, which increased the production of tartaric and malic acids. The aroma of the berry was extremely sensitive to salinity and showed a considerable decline in abundance and variety at 20 mM NaCl. In summary, moderate salinity enhanced the overall berry quality, but decreased the aroma quality, whereas high salinity decreased the berry quality. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Electric Literature of C15H22O2).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. 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.Electric Literature of C15H22O2

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

Didehydrogeranylgeranyl (ΔΔGG): A fluorescent probe for protein prenylation was written by Liu, Xiao-hui;Prestwich, Glenn D.. And the article was included in Journal of the American Chemical Society in 2002.Reference of 37905-02-5 The following contents are mentioned in the article:

The first intrinsically fluorescent analog of geranylgeraniol, (2E,6E,8E,10E,12E,14E)-geranylgeraniol (all-trans-ΔΔGGOH) has been synthesized stereoselectively and shown to substitute for the geranylgeranyl (GG) moiety in prenyltransferase reactions and in protein-ligand binding assays. All-trans-ΔΔGGOH showed blue fluorescence in methanol, with λ_ex = 310 nm and λ_em = 410 nm (ε₃₁₀ = 2.4 × 10⁴ M^-1 cm^-1), but was only weakly fluorescent in aqueous solution The prenyltransferase efficiency for the diphosphate analog ΔΔGGPP as a substrate for yeast protein geranylgeranyltransferase (PGGTase-I) was 60% relative to that for GGPP. The binding of ΔΔGG-AcCysMe to the recombinant Rho GTPase dissociation inhibitor (RhoGDI) had a K_D of 15.1 μM, 6-fold lower than the affinity of GG-AcCysMe. Thus, the ΔΔGG moiety is a novel fluorophore suitable for studying the interaction and subcellular localization of prenylated small GTPase proteins in signaling complexes. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Reference of 37905-02-5).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) 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. 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 37905-02-5

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