Month: December 2022

Chemical Composition of the Essential Oil from Cirsium setidens, a Korean Medicinal Plant was written by Choi, Hyang-Sook. And the article was included in Analytical Chemistry Letters in 2015.Related Products of 5444-75-7 The following contents are mentioned in the article:

The objective of the present study was to investigate the chem. composition of the essential oil from Cirsium setidens. C. setidens (koryoungungqwui in Korea) is a perennial plant belonging to the Compositae family, and it is an endemic species of Korea. The essential oil obtained by hydrodistillation Clevenger method from the aerial part of C. setidens was analyzed by GC and GC-MS. Ninety-two volatile flavor components, constituting 94.0 % of the total volatile composition of the essential oil, were identified in the essential oil of C. setidens. The oil was composed mainly of alcs., ketones, esters, terpenes, carboxylic acid and hydrocarbons. Phytol (38.67 %) was the most abundant compound, followed by 6,10,14-trimethyl-2-pentadecanone (16.74 %), hexadecanoic acid (8.37 %), 1,2,15,16-diepoxyhexadecane (2.30 %), and β-caryophyllene alc. (2.28 %). This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Related Products of 5444-75-7).

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. Related Products of 5444-75-7

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

A New Class of Oxyimides: Oxyimide Ethers and Their Use as Flame Retardants was written by Spiess, Bianca;Metzsch-Zilligen, Elke;Pfaendner, Rudolf. And the article was included in Macromolecular Materials and Engineering in 2021.Name: Diphenyl carbonate The following contents are mentioned in the article:

Oxyimides have gained wide interest in different applications because of radical generating properties, such as flame retardants in various polymers. As polyamide-6 (PA6) is highly flammable and shows burning dripping during incineration the mentioned issues have to be overcome by the use of a flame retardant. All previously developed oxyimides already show these properties, but this is based on the ester structure with the consequence of transesterification/transamidation in polyesters/polyamides. In this work, a new class of oxyimides based on ether bonds is synthesized. Oxyimide ethers do not degrade PA6, only sometimes slightly increase MVR, and show excellent flame retardancy in PA6. Depending on the structure, UL 94 V-0 can be reached with very low loadings. This makes oxyimide ethers an alternative to commonly used flame retardants for PA6. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Name: 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. 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.Name: Diphenyl carbonate

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

Analysis of chemical compositions of volatile oil in wild eggplant leaves and its application in cigarette was written by Lin, Kai. And the article was included in Jiangxi Nongye Xuebao in 2013.Recommanded Product: 5444-75-7 The following contents are mentioned in the article:

The volatile oil in wild eggplant leaf was extracted by simultaneous distillation and solvent extraction, and its chem. constituents were analyzed by comprehensive two-dimensional gas chromatog. and time-of-flight mass spectrometry (GC×GC-TOF-MS). Total 322 kinds of volatile oil constituents were identified, including 40 kinds of alc., 41 kinds of aldehyde, 5 kinds of acid, 2 kinds of lactone, 87 kinds of alkane, 21 kinds of olefin, 67 kinds of ketone and 10 kinds of ester. Sensory evaluation results showed that the volatile oil of wild eggplant leaf, which was either directly added into the cigarette or indirectly added into the tobacco sheet in the mode of coating liquid, could harmonize with tobacco fragrance, enhance aroma quantity, reduce stimulation, increase the smoking satisfaction and comfort, and obviously improve the status of smoking gas. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 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. 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: 5444-75-7

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

‘Ene’-type reaction of the Pummerer rearrangement product derived from 4-chlorophenyl methyl sulfoxide. Synthesis of some insect sex pheromones was written by Ishibashi, Hiroyuki;Komatsu, Hajime;Ikeda, Masazumi. And the article was included in Journal of Chemical Research, Synopses in 1987.Application In Synthesis of (E)-Dodeca-9,11-dien-1-yl acetate The following contents are mentioned in the article:

4-ClC₆H₄SCH₂O₂CCF₃, obtained by treating 4-ClC₆H₄SOMe with (CF₃CO)₂O, underwent ene reactions with RCH₂CH:CH₂ [R = Et, Bu, pentyl, heptyl, (CH₂)₇CO₂Me] to give 4-ClC₆H₄SCH₂CH₂CH:CHR (I) in E–Z ratios of 85:15. Oxidation and thermolysis of I gave CH₂:CHCH:CHR. I [R = (CH₂)₇CO₂Me] was converted to CH₂:CHCH:CH(CH₂)₈OAc, the pheromone of the red bollworm moth, and to bombykol. I (R = Et) was converted to Et(CH:CH)₂(CH₂)₈OAc, an isomer of the tobacco cutworm pheromone. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Application In Synthesis of (E)-Dodeca-9,11-dien-1-yl acetate).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) 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. 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.Application In Synthesis of (E)-Dodeca-9,11-dien-1-yl acetate

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

Chemical constituents and radical scavenging activity of Cuscuta pedicellata seed extracts was written by Abdallah, Walid E.;Elsayed, Wael M.;Abdelshafeek, Khaled A.. And the article was included in International Journal of ChemTech Research in 2016.Application In Synthesis of Methyl nonadecanoate The following contents are mentioned in the article:

The seeds oil of Cuscuta pedicellata was extracted with pet. ether in a Soxhlet for two days and it’s constituents were identified using GC/MS anal. It was found that, the lipid constituents of pet. ether was found as oily residue which saponified to afford the unsaponifiable materials (saturated hydrocarbons, sterols and triterpenes) and 15 fatty acids which were identified by GC/MS analyses. The flavonoids were isolated from the Et acetate fraction and identified as: : Genkwanin, Astragalin, kaempferol and quercetin. The antioxidant activity of different extracts (pet. ether, unsap., fatty acids, 70% methanol, chloroform and Et acetate) were evaluated.Antioxidant properties were determined using the 2,2-diphenyl-1-picryl-hydrazyl (DPPH) free radical. It was observed that methanol extract exhibited highest DPPH activity followed by Et acetate extract This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Application In Synthesis of Methyl nonadecanoate).

Methyl nonadecanoate (cas: 1731-94-8) 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.Application In Synthesis of Methyl nonadecanoate

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

Catalytic Asymmetric Allylic Substitution with Copper(I) Homoenolates Generated from Cyclopropanols was written by Zhang, Qi;Zhou, Si-Wei;Shi, Chang-Yun;Yin, Liang. And the article was included in Angewandte Chemie, International Edition in 2021.Recommanded Product: Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

By using copper(I) homoenolates as nucleophiles, which are generated through the ring-opening of 1-substituted cyclopropane-1-ols, a catalytic asym. allylic substitution with allyl phosphates is achieved in high to excellent yields with high enantioselectivity. Both 1-substituted cyclopropane-1-ols and allylic phosphates enjoy broad substrate scopes. Remarkably, various functional groups, such as ether, ester, tosylate, imide, alc., nitro, and carbamate are well tolerated. Moreover, the present method is nicely extended to the asym. construction of quaternary carbon centers. Some control experiments argue against a radical-based reaction mechanism and a catalytic cycle based on a two-electron process is proposed. Finally, the synthetic utilities of the product are showcased by means of the transformations of the terminal olefin group and the ketone group. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Recommanded Product: Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) 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. 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: Ethyl 3-ethoxypropanoate

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

Photochemical reactions of 2-(alkoxycarbonyl)-, 2-cyano-, and 2-(phenylthio)cycloalkanones in alcoholic solution. Formation of ω-substituted esters was written by Tokuda, Masao;Watanabe, Yasuyuki;Itoh, Mitsuomi. And the article was included in Bulletin of the Chemical Society of Japan in 1978.Related Products of 18891-13-9 The following contents are mentioned in the article:

Photochem. reaction of Et 2-oxo-1-cyclohexanecarboxylate (I) in MeOH gave Et Me heptanedioate, trans– and cis-Et 7-oxo-2-heptenoate, and Et 7-oxo-3-heptenoate in 25, 7, 8, and 21% yields, resp. Photochem. reactions of I in EtOH, iso-PrOH, tert-BuOH gave the corresponding ω-alkoxycarbonyl esters. Other 2-(alkoxycarbonyl)cyclopentanones and -cycloheptanones underwent similar reactions to give the corresponding ω-alkoxycarbonyl esters. Photochem. reactions of 2-cyanocyclohexanones in MeOH similarly gave ω-cyano esters and ω-formyl α,β-unsaturated nitriles. However, photochem. reactions of 2-(phenylthio)- and 2-(methylthio)cyclohexanones in MeOH did not give the corresponding ω-phenylthio or ω-methylthio carboxylic acid esters, products resulting from cleavage of a carbon-sulfur bond being obtained. This study involved multiple reactions and reactants, such as Ethyl methyl adipate (cas: 18891-13-9Related Products of 18891-13-9).

Ethyl methyl adipate (cas: 18891-13-9) 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. 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.Related Products of 18891-13-9

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

Pd immobilized on magnetic chitosan as a heterogeneous catalyst for acetalization and hydrogenation reactions was written by Zhou, Jinghui;Dong, Zhengping;Yang, Honglei;Shi, Zhiqiang;Zhou, Xingchun;Li, Rong. And the article was included in Applied Surface Science in 2013.Electric Literature of C7H14O3 The following contents are mentioned in the article:

A palladium-based catalyst supported on chitosan magnetite nanoparticles was successfully prepared by a facile one-pot template-free method combined with a metal adsorption-reduction procedure. The catalyst was characterized by Fourier transform IR spectroscopy (FT-IR), transmission electron microscope (TEM), vibrating sample magnetometer (VSM), X-ray powder detection (XRD), XPS. The catalyst afforded fast conversions for various aromatic nitro and unsaturated compounds, a under a H₂ atmosphere in ethanol, even at room temperature Furthermore, it was found that the catalyst showed a high activity for the acetalization reaction, affording over a 99% yield in all the cases investigated. Interestingly, the novel catalyst could be recovered in a facile manner from the reaction mixture and recycled five times without any significant loss in activity. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Electric Literature of C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) 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. 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.Electric Literature of C7H14O3

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

Recycling system that converts plastic into fertilizer was written by Aoki, Daisuke;Otsuka, Hideyuki. And the article was included in Konbatekku in 2022.Quality Control of Diphenyl carbonate The following contents are mentioned in the article:

More than 70% of the polymer materials (plastics) that are indispensable for daily life are discarded. In order to recycle plastics, it is necessary to selectively collect only plastics from all waste products and carry out a recycling process according to the type of plastics, but the problem to be solved in any case is is left. Focusing on the recycling process related to this article, two typical recycling processes (material recycling and chem. recycling) can be briefly mentioned by collecting, processing and reusing used plastics. In “Material Recycling”, the color is suitable due to foreign matter contamination and the quality is deteriorated due to the deterioration of the mol. chamber that occurs in the recycling process. In this article, the author devices a method to degrade the polycarbonates to produce fertilizers for plants from plastic wastes. 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 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. 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.Quality Control of Diphenyl carbonate

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

Regioselectivity and deuterium isotope effects in geraniol hydroxylation by the cytochrome P-450 monooxygenase from Catharanthus roseus (L.) G. Don was written by Fretz, Heinz;Woggon, Wolf Dietrich. And the article was included in Helvetica Chimica Acta in 1986.Computed Properties of C12H18O3 The following contents are mentioned in the article:

The hydroxylation of geraniol (I) by cytochrome P 450 from the subtropical plant C. roseus was optimized to give 8-hydroxygeraniol as the single product in 35% yield. Incubations of different ¹³C- and ²H-labeled geraniols revealed that H abstraction was completely regioselective in favor of the CH₃ group trans to the chain at C(6) of I. An intramol. deuterium isotope effect k_H/k_D of 8.0 was determined, suggesting that H abstraction is one of the major rate-contributing steps; however, the intramol. isotope effect was surprisingly inverse at low conversion, k_H/k_D = 0.50, indicating the existence of rate-contributing steps preceding the 1st irreversible, isotope-sensitive reaction in the sequence. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Computed Properties of C12H18O3).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) 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. 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.Computed Properties of C12H18O3

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