Category: esters-buliding-blocks

Flavor components in tobacco capsules identified through non-targeted quantitative analysis was written by Lim, Hyun-Hee;Choi, Kyeong-Yun;Shin, Ho-Sang. And the article was included in Journal of Mass Spectrometry in 2022.Application In Synthesis of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate This article mentions the following:

Tobacco flavors increase the attractiveness of a tobacco brand and ultimately promote addiction. Information about what flavor and how much flavor is in flavor capsules can provide an effective way to regulate tobacco flavor. In this study, 128 flavor chems. were identified and quantified by gas chromatog.-mass spectrometry using libraries and authentic standards Validation of the developed method was performed for interference, detection limits, calibration curves, accuracy, and precision. Menthol was the main ingredient in all capsules, and the carcinogenic pulegone was detected. Detected menthofuran, benzyl alc., geraniol, and eugenol cause toxic or severe irritation, and detected lactones can increase nicotine addiction by inhibiting nicotine metabolism in smokers. Margin of exposures for carcinogenic pulegone and non-carcinogenic menthol were well below safety thresholds, indicating a significant risk of inhalation exposure. It is desirable to prohibit the use of flavor capsules in consideration of human risk. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Application In Synthesis of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate).

(E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3) 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.Application In Synthesis of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate

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

Influence of Freezing and Different Drying Methods on Volatile Profiles of Strawberry and Analysis of Volatile Compounds of Strawberry Commercial Jams was written by Abouelenein, Doaa;Mustafa, Ahmed M.;Angeloni, Simone;Borsetta, Germana;Vittori, Sauro;Maggi, Filippo;Sagratini, Gianni;Caprioli, Giovanni. And the article was included in Molecules in 2021.Name: 5-Hexyldihydrofuran-2(3H)-one This article mentions the following:

Strawberry is the most consumed berry fruit worldwide due to its unique aroma and flavor. Drying fruits to produce a powder represents one of the possible conservation methods to extend their shelf-life. The aim of the present study was to compare the influence of freezing and different drying methods on the volatile profile of strawberry using the HS-SPME/GC-MS method, in addition to anal. of strawberry jam volatiles. A total of 165 compounds were identified, accounting for 85.03-96.88% of the total volatile compositions Results and PCA showed that freezing and each drying process affected the volatile profile in a different way, and the most remarkable representative differential volatiles were Et hexanoate, hexyl acetate, (E)-2-hexenyl acetate, mesifurane, (E)-nerolidol, 绾?decalactone, 1-hexanol, and acetoin. Shade air-dried, frozen, freeze-dried, and oven-dried 45鎺矯 samples retained more of the fruity and sweet aromas of strawberry, representing more than 68% of the total aroma intensity according to the literature. In contrast, the microwave-drying method showed drastic loss of fruity esters. Strawberry jams demonstrated complete destruction of esters and alcs. in most jams, while terpenes were significantly increased. These findings help better understand the aroma of strawberry and provide a guide for the effects of drying, freezing, and jam processing. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Name: 5-Hexyldihydrofuran-2(3H)-one).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) 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.Name: 5-Hexyldihydrofuran-2(3H)-one

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

Sustainable polypyrrole-based magnetic-microextraction of phthalates from jellies and apple-based beverages prior to tandem mass spectrometry analysis was written by Rodriguez-Ramos, Ruth;Socas-Rodriguez, Barbara;Santana-Mayor, Alvaro;Salazar-Carballo, Pedro Angel;Rodriguez-Delgado, Miguel Angel. And the article was included in Journal of Chromatography A in 2021.Application of 84-61-7 This article mentions the following:

Synthesized polypyrrole-coated Fe3O4 magnetic nanoparticles have been successfully characterised and applied as sorbent for the magnetic-micro-dispersive solid-phase extraction of eleven phthalic acid esters from jelly and apple-based beverage matrixes widely consumed by the population and, especially, by children. Sorbent was synthesized through chem. coprecipitation and subsequently characterised by different techniques. The influence of several parameters on the extraction efficiency was exhaustively evaluated using a step-by-step strategy. The separation and quantification of the selected phthalates were performed by ultra-high performance liquid chromatog. coupled to tandem mass spectrometry. The validation of the methodol. was carried out for jellies and apple-based beverages, employing dihexyl phthalate-3,4,5,6-d4 as the surrogate standard Relative recovery values were in the range 70-114% for both matrixes and relative standard deviations below 20% were obtained. The limits of quantification of the method were found in the range 0.147-0.416 娓璯/L. Feasibility of the developed methodol. was proved by the anal. of commercialised jelly and apple-based beverage products. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Application of 84-61-7).

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. 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 of 84-61-7

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

The chances of thermooxidation stabilization of poly(3-hydroxybutyrate) during processing-A critical evaluation was written by Tochacek, Jiri;Prikryl, Radek;Mencik, Premysl;Melcova, Veronika;Figalla, Silvestr. And the article was included in Journal of Applied Polymer Science in 2021.Product Details of 6683-19-8 This article mentions the following:

The performance of a series of thermooxidn. stabilizers was investigated in poly(3-hydroxybutyrate) (PHB) during processing by multiple extrusion at 190鎺矯. The issue was to find out if PHB may be processing stabilized or not. Phenols of different steric hindrance, phosphites, amine oxide, hydroxylamine, lactone, hindered amine and carbodiimide were tested as potential stabilizers and their efficiencies compared with non-stabilized polymer as a reference Multiple extrusion data was evaluated using the processing degradation index (PDI) formerly designed for polypropylene. Changes in mol. weight were monitored as well. The results have shown that none of the stabilizing structures, currently successfully used in other polymers, have the ability to protect PHB. This indirectly implies that no radical chain scission takes place during PHB processing, i.e. no thermooxidn. takes place. Moreover, nearly all of the tested structures act as prodegradants in PHB, some of them very strong. The strongest ones contain P or N atoms with asym. free electron pairs in their mols. that evidently accelerate the main degradation mechanism of PHB-thermally induced cis-elimination. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Product Details of 6683-19-8).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) 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. 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.Product Details of 6683-19-8

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

Cobalt-Catalyzed Desymmetric Isomerization of Exocyclic Olefins was written by Liu, Xufang;Rong, Xianle;Liu, Shihan;Lan, Yu;Liu, Qiang. And the article was included in Journal of the American Chemical Society in 2021.Electric Literature of C10H16O2 This article mentions the following:

Chiral cyclic olefins, 1-methylcyclohexenes, are versatile building blocks for the synthesis of pharmaceuticals and natural products. Despite the prevalence of these structural motifs, the development of efficient synthetic methods remains an unmet challenge. Herein the authors report a novel desym. isomerization of exocyclic olefins using a series of newly designed chiral cobalt catalysts, which enables a straightforward construction of chiral 1-methylcyclohexenes with diversified functionalities. The synthetic utility of this methodol. is highlighted by a concise and enantioselective synthesis of a natural product, 灏?bisabolene. The versatility of the reaction products is further demonstrated by multifarious derivatization. In the experiment, the researchers used many compounds, for example, Ethyl 4-methylenecyclohexanecarboxylate (cas: 145576-28-9Electric Literature of C10H16O2).

Ethyl 4-methylenecyclohexanecarboxylate (cas: 145576-28-9) 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. 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.Electric Literature of C10H16O2

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

Application and toxicity studies of arabinoxylan and 灏?D-glucan stearic acid ester composite coatings in extending postharvest storage of peach was written by Ali, Usman;Kaur, Prabhjot;Kanwar, Swati;Kumar, Vibhu;Maurya, Rohit;Bishnoi, Mahendra;Basu, Santanu;Mazumder, Koushik. And the article was included in Scientific Reports in 2021.SDS of cas: 706-14-9 This article mentions the following:

Peaches are good source of nutrients and known for their taste and aroma. The highly perishable nature of the peaches tends to decay rapidly during transportation and storage is a serious constraint for efficient transportation and storage. Therefore, the effect of arabinoxylan (AX) and 灏?D-glucan stearic acid ester (SABG) composite coating material was examined for the postharvest storage quality of peach under storage at 22 鍗?2 鎺矯 with 85% relative humidity (RH). Both, AX-SABG and shellac (1-2%) coatings significantly reduced the change in the quality attributes like weight loss (1.2-1.4 fold), respiration rate (1.1-1.2 fold), ripening index (1.3-1.5 fold) and firmness (1.3-1.5 fold) during 6 days storage as compared to the uncoated peaches. In addition, AX-SABG (1-2%) coating was more effective in retaining aroma volatiles and reducing disease incidence compared to shellac. Further, acute and chronic toxicol. studies have shown no tissue related toxicity and mortality in mice. Our results suggest that AX-SABG as an edible coating has the potential to preserve the fruit quality during 6 days storage at 22 鍗?2 鎺矯 and extend the postharvest shelf life of peach during storage. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9SDS of cas: 706-14-9).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) 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. Polyesters are important plastics, with monomers linked by ester moieties. 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.SDS of cas: 706-14-9

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

Synthesis of a complete series of C-4 fluorinated Phe-Gly mimetics was written by Berts, Wei;Luthman, Kristina. And the article was included in Tetrahedron in 1999.HPLC of Formula: 87694-53-9 This article mentions the following:

The complete series of allylic monofluorinated derivatives I (R¹ = H, R² = F; R¹ = F, R² = H) and difluorinated derivatives II of Boc-Phe-Gly-OMe has been synthesized using facile methods. The saturated derivatives of I and II were also synthesized. Diastereomeric allylic alc. derivatives were used as key intermediates. Cis- and trans-aziridine derivatives were synthesized in high yields from the diastereomeric alcs. using Mitsunobu conditions. The aziridines were treated with diethylaminosulfur trifluoride (DAST) at room temperature, which resulted in stereoselective ring openings yielding the monofluorinated derivatives The difluorinated isostere was synthesized from the 绾?keto ester derivative using DAST. In the experiment, the researchers used many compounds, for example, (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9HPLC of Formula: 87694-53-9).

(S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9) 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.HPLC of Formula: 87694-53-9

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

Ynamide-Mediated Thionoester and Dithioester Syntheses was written by Yao, Chaochao;Yang, Jinhua;Lu, Xiaobiao;Zhang, Shuyu;Zhao, Junfeng. And the article was included in Organic Letters in 2020.Recommanded Product: Benzyl benzodithioate This article mentions the following:

A novel ynamide-mediated synthesis of thionoesters and dithioesters is described. The selective addition reactions of various monothiocarboxylic acids with ynamide furnish 浼?thioacyloxyenamides, which undergo transesterification with nucleophilic -OH or -SH species to afford thionoesters and dithioesters, resp. The broad substrate scope, mild reaction conditions, and excellent yields make this method an attractive synthetic approach to thionoesters and dithioesters. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Recommanded Product: Benzyl benzodithioate).

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

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

Study of phase separation behavior of poly(N,N-diethylacrylamide) in aqueous solution prepared by RAFT polymerization was written by Wu, Mei;Zhang, Haibing;Liu, Hongliang. And the article was included in Polymer Bulletin (Heidelberg, Germany) in 2019.Related Products of 27249-90-7 This article mentions the following:

A series of poly(N,N-diethylacrylamide) samples with low mol. weights (1.9 鑴?10³-5.3 鑴?10⁴) and narrow polydispersities (below 1.5 and usually lower than 1.25) was synthesized by reversible addition-fragmentation chain transfer polymerization The phase separation behavior of poly(N,N-diethylacrylamide) in aqueous solution was investigated by turbidimetry, fluorescent probe technol. and DSC. It is interesting to find that the lower critical solution temperature (LCST) of the samples increases with increasing mol. weight and remains more or less a constant above a critical mol. weight of 1.2 鑴?10⁴. At the same time, an inverse dependence of LCST on the concentration was found and this effect was more pronounced for lower mol. weight To further investigate the novel mol. weight dependence of the LCST, the fluorescent probe study was conducted and the exptl. results demonstrated that there was an increase in hydrophobicity when decreasing the mol. weight and increasing the concentration and flower-like micelles were probably formed which can further be proved by TEM. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Related Products of 27249-90-7).

Benzyl benzodithioate (cas: 27249-90-7) 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 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.Related Products of 27249-90-7

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

Significance of Hydrogen Bonding at the S₁‘ Subsite of Calpain I was written by Donkor, I. O.;Zheng, X.;Han, J.;Lacy, C.;Miller, D.. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2001.Name: (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate This article mentions the following:

浼?Ketohydroxamates were synthesized as bioisosteres of 浼?ketoamides. The 浼?ketohydroxamates were generally more potent than the corresponding 浼?ketoamides. The potency of the compounds suggests that hydrogen bonding and steric bulk of substituents on the nitrogen atom of the ketoamide moiety influence calpain inhibition. In the experiment, the researchers used many compounds, for example, (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9Name: (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate).

(S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9) 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. 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.Name: (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate

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