Category: esters-buliding-blocks

Characterisation of aroma profile and evaluation of aroma quality in sweet cream butter was written by Tamura, Hirotoshi;Ueno, Shoko;Naka, Azusa;Zhao, Huajie;Yonekura, Lina;Isogai, Tomoyuki;Wakui, Ryota;Shiota, Makoto. And the article was included in International Dairy Journal in 2021.Electric Literature of C6H12O2 This article mentions the following:

The objective of this study was to determine which volatile compounds are responsible for the aroma of fresh sweet cream butter, using a liquid-liquid extraction method coupled with a Porapak Q column and limited odor units (Lod) as tech. methods. Sixty-four compounds were quant. identified. Assessors determined 100 ppm as the critical concentration for good aroma. Individual Lod100 were calculated at 100 ppm of the extracted oil using each compound’s thresholds and then twenty-three chems. such as δ-dodecalactone, δ-decalactone, γ-decalactone, acetaldehyde, and decanoic acid were selected as the potent aroma compounds in terms of Lod100 values greater than one. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Electric Literature of C6H12O2).

Methyl2-methylbutyrate (cas: 868-57-5) 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. 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.Electric Literature of C6H12O2

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

Rh-Catalyzed Coupling of Acrylic/Benzoic Acids with α-Diazocarbonyl Compounds: An Alternative Route for α-Pyrones and Isocoumarins was written by Hong, Chao;Yu, Shuling;Liu, Zhanxiang;Zhang, Yuhong. And the article was included in Organic Letters in 2022.Synthetic Route of C12H14O3 This article mentions the following:

A coupling of acrylic acids/benzoic acids with α-diazocarbonyl compounds had been realized by a combined catalytic system of rhodium catalyst and Zn(OAc)₂ additive. The presence of Zn(OAc)₂ obviously accelerates the C(sp²)-H activation and destructed the formation of carboxylic ester that was formed via a nucleophilic O-H insertion to metal carbenoid. The procedure featured mild reaction conditions and broad substrate scope, providing a straightforward approach to the synthesis of α-pyrones I [R¹ = Me, Ph, Bn, etc.; R² = H, Me, Ph; R¹R² = (CH₂)₄; R³ = Me, Et, allyl, t-Bu, R⁴ = Me, Et, Ph, etc.] and isocoumarins II [R = H, 8-Me, 8-Me-6-MeO, etc.] without the transformation of carboxylic acids to the corresponding amides. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Synthetic Route of C12H14O3).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) 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. 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.Synthetic Route of C12H14O3

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

Reactions of ethyl cinnamates with arylacetamides was written by Shandala, Mowafak Y.;Al-Khashab, Abdul-Ilah Y.;Afzal, M.;Ahmad, Shakir S.. And the article was included in Journal of Heterocyclic Chemistry in 1980.COA of Formula: C10H11FO2 This article mentions the following:

Treating 4-RC₆H₄CH:CHCO₂Et (I; R = H, Cl, Me) with R¹C₆H₄CH₂CONH₂ (II; R¹ = H, 2-, 3-, 4-F, 3-Cl) gave the corresponding 2,6-diketo-3,4-diarylpiperidine III in addition to the corresponding 4-RC₆H₄CH:CHCONH₂ and R¹C₆H₄CH₂CO₂Et. The latter two are formed from the intermediates of the Claisen condensation of the reactants. Condensation of I (R = MeO) with II gave only p-methoxycinnamide in quant yields with the corresponding arylacetates. In the experiment, the researchers used many compounds, for example, Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2COA of Formula: C10H11FO2).

Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2) 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. 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.COA of Formula: C10H11FO2

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

Sodium bisulfite addition compounds of benzyl isothiocyanates: evidence for their structure as sodium benzylaminothiomethanesulfonates was written by Sankaran, L.;Rao, P. L. Narasimha. And the article was included in Indian Journal of Chemistry in 1977.Electric Literature of C8H6FNS This article mentions the following:

Na bisulfite addition compounds (I) of several 2-, 4-, 2,4- and 3,4-halogen substituted benzyl isothiocyanates were prepared by refluxing the isothiocyanates with Na2S2O5 in 60-75% aqueous ethanol. I are colorless microcrystalline powders, infusible, stable in the dry state and in aqueous solutions at neutral and acidic pH in the absence of air. I decomposed rapidly to benzyl thiocarbamates and sulfite in alk. solutions and to carbylamines by neutral KMnO4. Based on their UV and IR spectra, the structure of I is assigned as RNHCSSO3Na (R = R1C6H4CH2 or R12C6H3CH2, R1 = Br, Cl, F). In the experiment, the researchers used many compounds, for example, 4-Fluorobenzylisothiocyanate (cas: 2740-88-7Electric Literature of C8H6FNS).

4-Fluorobenzylisothiocyanate (cas: 2740-88-7) 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. 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. Electric Literature of C8H6FNS

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

Catalyst-free reductive hydrogenation or deuteration of aryl-heteroatom bonds induced by light was written by Yan, Boyu;Zhou, Yutong;Wu, Jieliang;Ran, Maogang;Li, Huihui;Yao, Qiuli. And the article was included in Organic Chemistry Frontiers in 2021.Recommanded Product: 118-61-6 This article mentions the following:

A simple and catalyst-free photochem. strategy for the direct reduction of aryl trimethylammonium salts ArNMe₃OTf (Ar = biphenyl-4-yl, 2-naphthyl, quinolin-3-yl, etc.), aryl triflates Ar¹OTf (Ar¹ = biphenyl-3-yl, 1,6-dimethylpyridin-4-yl, benzothiazol-5-yl, etc.), and haloarenes Ar²X (Ar² = biphenyl-4-yl, 2-naphthyl, quinolin-4-yl, etc.; X = Cl, Br, I) to arenes ArH/Ar¹H or deuterium-labeled arenes ArD/Ar¹D/Ar²D was described. A broad range of substrate scope was demonstrated with high yields and deuterium incorporations. Radical clock experiments indicate the formation of aryl radical intermediates that can also be trapped by phenols. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Recommanded Product: 118-61-6).

Ethyl 2-hydroxybenzoate (cas: 118-61-6) 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. 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.Recommanded Product: 118-61-6

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

Investigation of the Potential Environmental Risks of Phthalate Derivatives Designed To Be Environmentally Friendly was written by Zhang, Wenhui;Sun, Ruihao;Hou, Yilin;Qiu, Youli;Li, Yu. And the article was included in Environmental Toxicology and Chemistry in 2020.Recommanded Product: 118-61-6 This article mentions the following:

Phthalate derivatives with low estrogenic activity, high IR spectrum signals, high Raman characteristic vibration spectrum, high fluorescence intensity, and high UV sensitivity were selected as precursors from our previous studies, so that the changes in their toxicity and estrogenic activity during biol. metabolism, ozone oxidation, photocatalytic degradation, photodegradation, and microbial degradation could be studied. The transformation pathways of these derivatives were simulated, and the reaction energy barriers were calculated To determine the potential environmental risks of these phthalate derivatives, the pharmacophore models of biotoxicity and estrogen activity of phthalates were used to predict the biotoxicity and estrogen activity of the transformed products. The results showed an increase in the biotoxicity and estrogen activity of the biometabolites, ozonization products, photocatalytic degradation products, and microbial degradation products; the only products that did not follow this trend were the photodegradation products. Notably, the pathways that produced more potentially toxic compounds were the less favorable paths. Our results indicate that the transformation products of the designed environmentally friendly phthalate derivatives potentially pose environmental risks. To avoid such risks, the environmental transformation pathway of these derivatives should be simulated to screen for environmentally friendly phthalate mols. Environ Toxicol Chem 2020;00:1-11. © 2020 SETAC. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Recommanded Product: 118-61-6).

Ethyl 2-hydroxybenzoate (cas: 118-61-6) 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. 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: 118-61-6

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

Reduced efficiency roll-off in light-emitting diodes enabled by quantum dot-conducting polymer nanohybrids was written by Bae, Wan Ki;Lim, Jaehoon;Zorn, Matthias;Kwak, Jeonghun;Park, Young-Shin;Lee, Donggu;Lee, Seonghoon;Char, Kookheon;Zentel, Rudolf;Lee, Changhee. And the article was included in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2014.Product Details of 27249-90-7 This article mentions the following:

The authors demonstrate QLEDs implementing wider active layers (50 nm) based on QD-conducting polymer nanohybrids, which exhibit a stable operational device performance across a wide range of current densities and brightness. A comparative study reveals that the significant suppression of efficiency roll-off in the high c.d. regime is primarily attributed to a sufficient charge carrier distribution over the wider active layer and improved charge carrier balance within QDs enabled by the hybridization of QDs with conducting polymers. Use of this finding in future studies should greatly facilitate the development of high performance, stable QLEDs at high c.d. or luminance regime toward displays or solid-state lighting applications. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Product Details of 27249-90-7).

Benzyl benzodithioate (cas: 27249-90-7) 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 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.Product Details of 27249-90-7

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

Design, synthesis and biological evaluation of pyridin-3-yl pyrimidines as potent Bcr-Abl inhibitors was written by Pan, Xiaoyan;Dong, Jinyun;Gao, Hongping;Wang, Fang;Zhang, Yanmin;Wang, Sicen;Zhang, Jie. And the article was included in Chemical Biology & Drug Design in 2014.Safety of Ethyl 3-amino-4-methylbenzoate This article mentions the following:

A series of pyridin-3-yl pyrimidines was synthesized and evaluated for their Bcr-Abl inhibitory and anticancer activity. The preliminary results indicated that some compounds were promising anticancer agents. Compounds I [R = 3-CF₃, 3,5-(CF₃)₂, 3-Br-5-CF₃] exhibited potent Bcr-Abl inhibitory activity, suggesting that aniline containing halogen substituents might be important for biol. activity. Mol. docking was carried out to investigate the binding mode of them with Bcr-Abl. Details of synthesis and SAR studies of these compounds are described. In the experiment, the researchers used many compounds, for example, Ethyl 3-amino-4-methylbenzoate (cas: 41191-92-8Safety of Ethyl 3-amino-4-methylbenzoate).

Ethyl 3-amino-4-methylbenzoate (cas: 41191-92-8) 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. 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.Safety of Ethyl 3-amino-4-methylbenzoate

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

A Sweet Origin for the Key Congocidine Precursor 4-Acetamidopyrrole-2-carboxylate was written by Lautru, Sylvie;Song, Lijiang;Demange, Luc;Lombes, Thomas;Galons, Herve;Challis, Gregory L.;Pernodet, Jean-Luc. And the article was included in Angewandte Chemie, International Edition in 2012.Category: esters-buliding-blocks This article mentions the following:

The 4-acetamidopyrrole-2-carboxylate is reported to be the true precursor of congocidine in Streptomyces. A biosynthetic pathway is proposed starting with N-acetylglucosamine-1-phosphate, involves carbohydrate metabolizing enzymes and differs from known pyrrole biosynthetic pathways. In the experiment, the researchers used many compounds, for example, Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7Category: esters-buliding-blocks).

Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7) 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. 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.Category: esters-buliding-blocks

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

Thermal desorption inverse-voltage low temperature plasma ionization source mass spectrometry for detection of phthalates in food was written by Shen, Zeyue;Xu, Wen;Zhang, Junliang;Zhang, Tengyu;Zhan, Yuxing;Yu, Jiancheng;Tang, Keqi. And the article was included in Fenxi Shiyanshi in 2022.Formula: C20H26O4 This article mentions the following:

Based on low temperature plasma, a set of thermal desorption inverse-voltage low temperature plasma ionization (TD-iLTPI) device was designed and fabricated. TD-iLTPI device is composed of a thermal desorption module and an ionization source module integrated on a π-type four-way tubing. Sample probe is inserted into the thermal desorption module to vaporize the sample after sample loading, and then the sample enters the ionization area with the carrier gas to be ionized. The needle electrode in iLTPI is connected to a.c., and the outer ring electrode is grounded. The electrode method is opposite to that of LTP. In this paper, the parameters of the TD-iLTPI-MS were optimized with 12 representative phthalates as the analytes, the performance of TD-iLTPI-MS was investigated, and the TD-iLTPI-MS was applied to test actual samples containing phthalates. The results showed that the standard curve of BBP had good linearity (R²=0.9958), the recoveries were 89.7%-116.8%, and the relative standard deviations were 4.5%-8.2%. The detection limit of phthalates was also far lower than that using other ambient ion sources. The developed method was used for fast screening of phthalates in liquor, fruit juice, bread, cheese and butter, and quant. determination of BBP in juice. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Formula: C20H26O4).

Dicyclohexyl phthalate (cas: 84-61-7) 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. 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. Formula: C20H26O4

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