Tag: 200-300

A calorimetric study of the interaction of synthetic phospholipid liposomes with vinyl monomers, acrylates and methacrylates was written by Fujisawa, Seiichiro;Kadoma, Yoshinori;Masuhara, Eiichi. And the article was included in Journal of Biomedical Materials Research in 1984.Application In Synthesis of 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate The following contents are mentioned in the article:

Mono-, di-, and trimethacrylates (monomers) are widely used in dentistry as restorative materials, adhesives, prosthetic devices, etc. Residual monomers released from the cured resin have been implicated in toxicol. effects. To monitor the biol. actions at the membrane level induced by monomers, the changes in the phase transition temperature (T) and enthalpy (ΔH) of dipalmitoylphosphatidylcholine  [2644-64-6] liposomes induced by 37 different monomers were studied by DSC. The monomers that caused large changes in the T and ΔH were vinyl monomers, acrylates, monomethacrylates that contain hydroxy, carbonyl, amino, and Ph groups, dimethacrylates with short-chain substituents, and aliphatic trimethacrylates. The changes in the T and ΔH values may be due not only to hydrophobic interactions, but also to interactions induced by the double bonds or the functional groups in the monomers. On the other hand, methacrylates with simple alkyl ester linkage and dimethacrylates with bisphenol A groups exhibited the smallest effects. The changes in the T and ΔH induced by highly hydrophobic methacrylates were small due to their slower interaction. These changes in transition properties of liposomes seem to be related to biol. activities. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Application In Synthesis of 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate).

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. 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.Application In Synthesis of 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate

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

Synthesis of reprocessable lignin-based non-isocyanate poly(imine-hydroxyurethane)s networks was written by Xue, Danwei;Xue, Bailiang;Tang, Rui;Shen, Chao;Li, Xinping;Zhao, Wei. And the article was included in Paper and Biomaterials in 2021.SDS of cas: 102-09-0 The following contents are mentioned in the article:

In this study, an environmentally friendly and non-toxic route to synthesize lignin-based non-isocyanate poly(imine-hydroxyurethane)s networks was explored. Specifically, the NH₂-terminated polyhydroxyurethanes (NPHUs) prepolymer was first synthesized from bis(6-membered cyclic carbonate) (BCC) and diamine via the ring-opening reaction. Subsequently, the corresponding lignin based non-isocyanate polyurethanes (NIPUs) with tunable properties were synthesized from NPHUs and levulinate lignin derivatives containing ketone groups via the Schiff base reaction. The structural, mech., and thermal properties of NIPUs with different stoichiometric feed ratios of BCC and levulinate lignin were characterized by Fourier transform IR spectroscopy, NMR, differential scanning calorimetry, dynamic mech. anal., and thermogravimetric anal.. The results indicated that the tensile strength, Young’s modulus, toughness, storage modulus, glass transition temperature, and thermal stability of lignin-based NIPUs gradually increased with increasing lignin content, and the highest Young’s modulus of 41.1 MPa was obtained when lignin content reached 45.53%. With good reprocessing properties, this synthetic framework of lignin-based NIPUs also provides sustainable non-isocyanate-based substitutions to traditional polyurethane networks. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0SDS of cas: 102-09-0).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.SDS of cas: 102-09-0

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

Structure-Odor Relationship Study on Geraniol, Nerol, and Their Synthesized Oxygenated Derivatives was written by Elsharif, Shaimaa Awadain;Buettner, Andrea. And the article was included in Journal of Agricultural and Food Chemistry in 2018.Safety of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate The following contents are mentioned in the article:

Despite being isomers having the same citrus-like, floral odor, geraniol, 1, and nerol, 3, show different odor thresholds. To date, no systematic studies are at hand elucidating the structural features required for their specific odor properties. Therefore, starting from these two basic structures and their corresponding esters, namely, geranyl acetate, 2, and neryl acetate, 4, a total of 12 oxygenated compounds were synthesized and characterized regarding retention indexes (RI), mass spectrometric (MS), and NMR (NMR) data. All compounds were individually tested for their odor qualities and odor thresholds in air (OT). Geraniol, the Z-isomer, with an OT of 14 ng/L, was found to be more potent than its E-isomer, nerol, which has an OT of 60 ng/L. However, 8-oxoneryl acetate was the most potent derivative within this study, exhibiting an OT of 8.8 ng/L, whereas 8-oxonerol was the least potent with an OT of 493 ng/L. Interestingly, the 8-oxo derivatives smell musty and fatty, whereas the 8-hydroxy derivatives show odor impressions similar to those of 1 and 3. 8-Carboxygeraniol was found to be odorless, whereas its E-isomer, 8-carboxynerol, showed fatty, waxy, and greasy impressions. Overall, we observed that oxygenation on C-8 affects mainly the odor quality, whereas the E/Z position of the functional group on C-1 affects the odor potency. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Safety of (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 typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 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.Safety of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate

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

Volatilomic Signatures of AGS and SNU-1 Gastric Cancer Cell Lines was written by Slefarska-Wolak, Daria;Heinzle, Christine;Leiherer, Andreas;Ager, Clemens;Muendlein, Axel;Mezmale, Linda;Leja, Marcis;Corvalan, Alejandro H.;Drexel, Heinz;Krolicka, Agnieszka;Shani, Gidi;Mayhew, Christopher A.;Haick, Hossam;Mochalski, Pawel. And the article was included in Molecules in 2022.Electric Literature of C15H22O2 The following contents are mentioned in the article:

In vitro studies can help reveal the biochem. pathways underlying the origin of volatile indicators of numerous diseases. The key objective of this study is to identify the potential biomarkers of gastric cancer. For this purpose, the volatilomic signatures of two human gastric cancer cell lines, AGS (human gastric adenocarcinoma) and SNU-1 (human gastric carcinoma), and one normal gastric mucosa cell line (GES-1) were investigated. More specifically, gas chromatog. mass spectrometry has been applied to pinpoint changes in cell metabolism triggered by cancer. In total, ten volatiles were found to be metabolized, and thirty-five were produced by cells under study. The volatiles consumed were mainly six aldehydes and two heterocyclics, whereas the volatiles released embraced twelve ketones, eight alcs., six hydrocarbons, three esters, three ethers, and three aromatic compounds The SNU-1 cell line was found to have significantly altered metabolism in comparison to normal GES-1 cells. This was manifested by the decreased production of alcs. and ketones and the upregulated emission of esters. The AGS cells exhibited the increased production of Me ketones containing an odd number of carbons, namely 2-tridecanone, 2-pentadecanone, and 2-heptadecanone. This study provides evidence that the cancer state modifies the volatilome of human cells. 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. 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.Electric Literature of C15H22O2

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

Fractionation and identification of minor and aroma-active constituents in Kangra orthodox black tea was written by Joshi, Robin;Gulati, Ashu. And the article was included in Food Chemistry in 2015.Product Details of 5444-75-7 The following contents are mentioned in the article:

The aroma constituents of Kangra orthodox black tea were isolated by simultaneous distillation extraction (SDE), supercritical fluid extraction and beverage method. The aroma-active compounds were identified using gas chromatog.-olfactometry-mass spectrometry. Geraniol, linalool, (Z/E)-linalool oxides, (E)-2-hexenal, phytol, β-ionone, hotrienol, methylpyrazine and Me salicylate were major volatile constituents in all the extracts Minor volatile compounds in all the extracts were 2-ethyl-5-methylpyrazine, ethylpyrazine, 2-6,10,14-trimethyl-2-pentadecanone, acetylfuran, hexanoic acid, dihydroactinidiolide and (E/Z)-2,6-nonadienal. The concentrated SDE extract was fractionated into acidic, basic, water-soluble and neutral fractions. The neutral fraction was further chromatographed on a packed silica gel column eluted with pentane and di-Et ether to sep. minor compounds The aroma-active compounds identified using gas chromatog.-olfactometry-mass spectrometry were 2-amylfuran, (E/Z)-2,6-nonadienal, 1-pentanol, epoxylinalool, (Z)-jasmone, 2-acetylpyrrole, farnesyl acetone, geranyl acetone, cadinol, cubenol and dihydroactinidiolide. AEDA studies showed 2-hexenal, 3-hexenol, ethylpyrazine, (Z/E)-linalool oxides, linalool, (E/Z)-2,6-nonadienal, geraniol, phenylethanol, β-ionone, hotrienol and dihydroactinidiolide to be odor active components. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Product Details of 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Product Details of 5444-75-7

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

Preparation of domoic acid analogues using a bioconversion system, and their toxicity in mice was written by Maeno, Yukari;Kotaki, Yuichi;Terada, Ryuta;Hidaka, Masafumi;Cho, Yuko;Konoki, Keiichi;Yotsu-Yamashita, Mari. And the article was included in Organic & Biomolecular Chemistry in 2021.Recommanded Product: (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate The following contents are mentioned in the article:

Domoic acid (1, DA), a member of the natural kainoid family, is a potent agonist of ionotropic glutamate receptors in the central nervous system. The chem. synthesis of DA and its derivatives requires considerable effort to establish a pyrrolidine ring containing three contiguous stereocenters. Recently, a biosynthetic cyclase for DA, DabC, was identified. This enzyme cyclizes the linear precursor of isodomoic acid A (IA) to IA, a bioactive DA analog. In this study, we developed a bioconversion system to obtain DA analogs from linear substrates prepared by simple chem. synthesis using DabC expressed in Escherichia coli, in vivo. Three IA analogs with various substitutions at the C7′-geranyl terminus were prepared using this system: two minor natural analogs, 7′-methyl-IA (5) and 7′-hydroxy-IA (6), and one new unnatural analog, 7′-amide-IA (7). In addition, the toxicity of these DA analogs in mice was examined by intracerebroventricular injection. Most of the mice injected with 5 (3 nmol) and 6 (3 nmol) did not show any adverse symptoms, whereas the mice injected with 7 (3 nmol) showed typical symptoms induced by DA (1, 0.7 nmol) and IA (2, 3 nmol). These results suggest that the 7′-carbonyl group in the side chain of IA (2) is crucial for its toxicity. The docking studies of DA, IA (2), 5, 6, and 7 to GluK1 supported these results. 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. 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. Recommanded Product: (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate

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

Hybrid heat-integrated design and control for a diphenyl carbonate reactive distillation process was written by Lee, Hao-Yeh;Novita, Felicia Januarlia;Weng, Kuo-Chun. And the article was included in Chemical Engineering and Processing in 2021.Application of 102-09-0 The following contents are mentioned in the article:

This study proposed the design and control system of a hybrid heat-integrated configuration for the di-Ph carbonate (DPC) indirect reactive distillation (RD) process. First, an existing DPC production process with an RD column and a distillation column (C1) as the base case was modified and optimized for further evaluation. Both thermally coupled distillation (TCD) and double-effect (DE) configurations were examined to simultaneously improve the energy efficiency. A hybrid heat-integrated configuration for the DPC indirect RD process was finally proposed. The remixing effect at the top part of the RD column could be removed, and the energy wastage in the condenser of the C1 was lower than that in the TCD configuration. The heat exchanger (HE) area was smaller than that in the DE configuration. Among all configurations, the hybrid configuration was superior; around 34.0% of energy could be saved for producing 99.5 mol% of DPC. Then, three control structures (CS1, CS2, and CS3) and two inventory control loops (inventories A and B) were proposed in the hybrid heat-integrated configuration. Pressure-compensated temperature (PCT) control was also applied to eliminate the effect of pressure floating. The dynamic simulation results revealed that the CS3 PCT could maintain specifications during throughput and composition disturbances. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Application of 102-09-0).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Application of 102-09-0

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

Direct synthesis of a high-density aviation fuel using a polycarbonate was written by Wang, Lulin;Han, Fengan;Li, Guangyi;Zheng, Min;Wang, Aiqin;Wang, Xiaodong;Zhang, Tao;Cong, Yu;Li, Ning. And the article was included in Green Chemistry in 2021.Quality Control of Diphenyl carbonate The following contents are mentioned in the article:

High-d. cyclic hydrocarbons were first synthesized with high carbon yields by a one-pot transfer hydrodeoxygenation of a polycarbonate (PC) using isopropanol as the solvent and hydrogen donor at the same time. RANEY nickel was found to be an effective catalyst for the conversion of the PC in isopropanol. Over it, the pure PC pellet was completely converted to a mixture of C₆-C₁₅ oxygenates, aromatics and cycloalkanes after the reaction was carried out at 463 K for 1 h. The catalytic performance of RANEY Ni was further improved after the introduction of solid acids as co-catalysts. Among the investigated solid acids, ultrastable Y (USY), a com. acidic zeolite, demonstrated the best promotion effect, which can be explained by its larger pore size and suitable acidity. Under the optimized conditions, an ∼75% carbon yield of C₆-C₁₅ cyclic hydrocarbons was achieved from the one-pot transfer hydrodeoxygenation of a chopped DVD disk under the co-catalysis of RANEY Ni and USY. According to our measurement, the C₆-C₁₅ cyclic hydrocarbon mixture as obtained has a high d. (0.94 g mL^-1), good volumetric net heat of combustion (NHOC) (41.5 MJ L^-1) and low f.p. (202 K-188 K). In real applications, it can be used as a potential substitute for currently used high-d. aviation fuels. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Quality Control of Diphenyl carbonate).

Diphenyl carbonate (cas: 102-09-0) 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.Quality Control of Diphenyl carbonate

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

Atmospheric degradation of industrial fluorinated acrylates and methacrylates with Cl atoms at atmospheric pressure and 298K was written by Rivela, Cynthia B.;Blanco, Maria B.;Teruel, Mariano A.. And the article was included in Atmospheric Environment in 2018.Electric Literature of C7H6F6O2 The following contents are mentioned in the article:

The gas-phase reaction of Cl atom with 2,2,2-trifluoroethylacrylate (k₁), 1,1,1,3,3,3-hexafluoroisopropylacrylate (k₂), 2,2,2-trifluoroethylmethacrylate (k₃) and 1,1,1,3,3,3-hexafluoroisopropylmethacrylate (k₄), have been investigated at 298K and 1atm using the relative method by gas chromatog. coupled with flame ionization detection (GC-FID). The values obtained are (in cm³ mol.^-1 s^-1): k₁(Cl+CH₂=CHC(O)OCH₂CF₃) = (2.41±0.57)×10^-10, k₂(Cl+CH₂=CHC(O)OCH(CF₃)₂) = (1.39±0.34)×10^-10, k₃(Cl+CH₂=C(CH₃)C(O)OCH₂CF₃) = (2.22±0.45)×10^-10, and k₄(Cl+CH₂=C(CH₃)C(O)OCH(CF₃)₂ = (2.44±0.52)×10^-10). Products identification studies were performed by solid-phase microextraction (SPME) method, with on-fiber products derivatization using o-(2,3,4,5,6-pentafluorobenzyl) hydroxylamine hydrochloride, coupled with gas chromatog. with mass spectrometry detection (GC-MS). Chloroacetone, trifluoroacetaldehyde and formaldehyde were observed as degradation products and a general mechanism is proposed. Addnl., reactivity trends and atm. implications are discussed. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Electric Literature of C7H6F6O2).

1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3) 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.Electric Literature of C7H6F6O2

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

Assessing the kinetic model of hydro-distillation and chemical composition of Aquilaria malaccensis leaves essential oil was written by Samadi, Mahtab;Abidin, Zurina Zainal;Yunus, Robiah;Biak, Dayang Radiah Awang;Yoshida, Hiroyuki;Lok, Eng Hai. And the article was included in Chinese Journal of Chemical Engineering in 2017.HPLC of Formula: 5444-75-7 The following contents are mentioned in the article:

This study aimed to model the kinetic of hydro-distillation of Aquilaria malaccensis leaves oil in order to understand and optimize the extraction process. In addition, this study, for the first time, aimed to identify the chem. compositions of the A. malaccensis leave-oil. By assessing both first-order kinetic model and the model of simultaneous washing and diffusion, the result indicated that the model of simultaneous washing and diffusion better described the hydro-distillation mechanism of the essential oil from A. malaccensis leaves. The optimum time, solid to liquid ratio and the heating power for extracting the highest amount of essential oil were found to be around 3 h, 1:10 (g · ml^-1) and 300 W, resp. Yellow essential oil with a strong smell and a yield of 0.05 v/w was extracted by hydro-distillation Clevenger apparatus Chem. compounds of the essential oil were analyzed using gas chromatog.-mass spectroscopy (GC/MS), which resulted in identification of 42 compounds that constitute 93% of essential oil. Among the identified components, Pentadecanal (32.082%), 9-Octadecenal, (Z) (15.894%), and Tetradecanal (6.927%) were the major compounds Considering the fact that all the identified major components possessed pesticidal properties, A. malaccensis leaves could be regarded as a promising natural source for producing pesticides. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7HPLC of Formula: 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. 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.HPLC of Formula: 5444-75-7

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