Category: esters-buliding-blocks

Extraction of phthalic acid esters from soft drinks and infusions by dispersive liquid-liquid microextraction based on the solidification of the floating organic drop using a menthol-based natural deep eutectic solvent was written by Ortega-Zamora, Cecilia;Jimenez-Skrzypek, Gabriel;Gonzalez-Salamo, Javier;Hernandez-Borges, Javier. And the article was included in Journal of Chromatography A in 2021.Application of 84-61-7 This article mentions the following:

In this work, a natural deep eutectic solvent (NADES) consisting of L-menthol and acetic acid in a 1:1 molar ratio has been applied as extraction solvent for the dispersive liquid-liquid microextraction based on the solidification of the floating organic drop (DLLME-SFO) of a group of nine phthalic acid esters (di-Pr phthalate, DPP; Bu benzyl phthalate, BBP; di-Bu phthalate, DBP; dicyclohexyl phthalate, DCHP; diisopentyl phthalate, DIPP; di-n-pentyl phthalate, DNPP; di(2-ethylhexyl) phthalate, DEHP; diisononyl phthalate, DINP; and diisodecyl phthalate, DIDP) from three common infusions (chamomile, pennyroyal mint, and linden teas) and three soft drinks (green tea, tonic, and lime and lemon drink), using dihexyl phthalate (DHP) and di-n-octyl phthalate (DNOP) as internal standards After the DLLME-SFO procedure, analyses were carried out by high-performance liquid chromatog. with UV detection. Method calibration showed good linearity for all the analytes and matrixes, with determination coefficients (R2) higher than 0.9910. Relative recovery values were between 71 and 125%, with relative standard deviation values in the range 1-22% for the six types of samples, while the limits of quantification of the method were in the range 4.3-51.1娓璯/L for infusions and in the range 3.5-33.3娓璯/L for soft drinks. Several samples purchased in different local supermarkets were analyzed, finding DPP, DBP, DIPP, DEHP and DINP, although only DPP, DBP and DEHP could be quantified in some of them. 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 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鎺?C閳ユ弲閳ユ彊 and O閳ユ弲閳ユ彊 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C閳ユ彊閳ユ弲 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 of 84-61-7

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

Efficient Synthesis of Functionalized 灏?Keto Esters and 灏?Diketones through Regioselective Hydration of Alkynyl Esters and Alkynyl Ketones by Use of a Cationic NHC-Au^I Catalyst was written by Tarigopula, Chandrahas;Thota, Ganesh Kumar;Balamurugan, Rengarajan. And the article was included in European Journal of Organic Chemistry in 2016.Related Products of 33166-79-9 This article mentions the following:

Regioselective hydration of 浼?alkynyl esters and ketones by using a cationic NHC-Au^I catalyst results in 灏?keto esters and 灏?diketones, resp. Controlled release of water in acetone by aldol self-condensation under the reaction conditions makes acetone as better solvent than 1,4-dioxane/water for the hydration of 浼?alkynyl esters having sensitive ester moieties. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Related Products of 33166-79-9).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) 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. Esters contain a carbonyl center, which gives rise to 120鎺?C閳ユ弲閳ユ彊 and O閳ユ弲閳ユ彊 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C閳ユ彊閳ユ弲 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 33166-79-9

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

Pharmacophore optimization of imidazole chalcones to modulate microtubule dynamics was written by Karaj, Endri;Dlamini, Samkeliso;Koranne, Radhika;Sindi, Shaimaa H.;Perera, Lalith;Taylor, William R.;Viranga Tillekeratne, L. M.. And the article was included in Bioorganic Chemistry in 2022.HPLC of Formula: 155380-11-3 This article mentions the following:

We recently reported a new class of imidazole-based chalcones as potential antimitotic agents. In view of their promising cytotoxic activity, a comprehensive structure-activity relationship (SAR) of these compounds was undertaken focusing on four major structural variations: the length of the mol., the Michael acceptor character, the nature and substitution pattern of ring B, and the nature of the amide functionality tethering ring B. These second-generation analogs (IBCs) demonstrated a superior bioactivity profile than the previously reported imidazole chalcones (referred to as IPEs). The analog IBC-2 with one less methylene group (nor series) and para-fluoro substituted ring B demonstrated the best cytotoxicity profile among the library of compounds A computational anal. of the NCI-60 data associated both IBCs and the previously reported IPEs with the privileged pharmacol. pharmacophore of chalcones. Interestingly, biol. studies suggest that the imidazole ring is essential for cytotoxic activity of the elongated chalcone analogs. Immunofluorescence studies revealed that IBC-2, unlike IPEs, has the ability to induce microtubule catastrophe independently of Aurora-B inhibition. The effects of IBC-2 on microtubule dynamics are similar to those of Nocodazole, but the cell cycle effects appear to be different. In-silico studies demonstrate that the members of the new series have the ability to bind to the colchicine binding site of 灏?tubulin with binding scores similar to those of IPEs, corresponding chalcones and Nocodazole. Although tubulin binding can partially explain the biol. effects of IBC-2, on-going target identification studies are aimed at further investigation of its biol. targets. In the experiment, the researchers used many compounds, for example, Methyl 2-(4-(hydroxymethyl)phenyl)acetate (cas: 155380-11-3HPLC of Formula: 155380-11-3).

Methyl 2-(4-(hydroxymethyl)phenyl)acetate (cas: 155380-11-3) 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.HPLC of Formula: 155380-11-3

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

Luminescent Boron Quinolate Block Copolymers via RAFT Polymerization was written by Cheng, Fei;Bonder, Edward M.;Jakle, Frieder. And the article was included in Macromolecules (Washington, DC, United States) in 2012.Recommanded Product: 27249-90-7 This article mentions the following:

The preparation of well-defined luminescent organoboron quinolate block copolymers via sequential RAFT polymerization is reported. Boron-containing block copolymers with PS, P(St-alt-MAh), and PNIPAM as the second block were successfully synthesized. The photophys. properties of the block copolymers were studied by UV-vis and fluorescence spectroscopy. Independent of the second block, the boron quinolate block copolymers that contain the parent 8-hydroxyquinolato ligand (PM1-b-PS, PM1-b-PNIPAM, PM1-b-P(St-alt-MAh)) are green luminescent, whereas a polymer with 5-(4-dimethylaminophenyl)-8-hydroxyquinolate as the ligand (PM2-b-PS) shows red luminescence. The P(St-alt-MAh)-based block copolymer was further modified with photoactive azobenzene groups. The self-assembly behavior of the amphiphilic block copolymers was studied by transmission electron microscopy (TEM) and dynamic light scattering (DLS). In water, PM1-b-PNIPAM forms spherical micelles. The azobenzene-modified P(St-alt-AbMA)-b-PM1 exhibits a solvent-dependent self-assembly behavior in basic solutions, and large spindle-shaped aggregates and spherical micelles were observed In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Recommanded Product: 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. 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.Recommanded Product: 27249-90-7

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

An expedient conversion of 浼?amino acids into Weinreb amides using COMU as a coupling agent was written by Tyrrell, Elizabeth;Brawn, Peter;Carew, Mark;Greenwood, Iain. And the article was included in Tetrahedron Letters in 2011.Product Details of 87694-53-9 This article mentions the following:

The use of COMU, as a non-hazardous partner, in the coupling of N-Boc 浼?amino acids with N-methoxy-N-methylamine to afford the corresponding Weinreb amides is discussed. From a practical point of view the reaction can be monitored visually by virtue of the color change associated with the conversion of substrates (yellow) into the products (orange). As the byproducts of the reaction are conveniently water-soluble, the products are isolated relatively pure and with minimal racemization. These factors coupled with the short reaction time make this a very useful procedure. 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: 87694-53-9Product Details of 87694-53-9).

(S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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 87694-53-9

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

浼?Ketoamide Phe-Pro isostere as a new core structure for the inhibition of HIV protease was written by Munoz, Benito;Giam, Chou-Zen;Wong, Chi-Huey. And the article was included in Bioorganic & Medicinal Chemistry in 1994.Name: (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate This article mentions the following:

Studies on the inhibition of HIV-1 protease utilizing a core isostere with replacement of the scissile bond for an 浼?amino-ketone have resulted in the development of an 浼?keto-amide isosteric replacement of the Phe-Pro scissile amide bond. The simple dipeptide isostere I was a promising new core structure for the development of the enzyme inhibitors. I exhibited K_i = 6 娓璏 against HIV-1 protease, compared to 230 娓璏 and >50 娓璏 for the corresponding phosphinic acid and hydroxyethylamine isosteres. 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 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鎺?C閳ユ弲閳ユ彊 and O閳ユ弲閳ユ彊 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C閳ユ彊閳ユ弲 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. Name: (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate

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

Chemical composition and oxidative stability of eleven pecan cultivars produced in southern Brazil was written by Reis Ribeiro, Stephanie;Klein, Bruna;Machado Ribeiro, Quellen;Duarte dos Santos, Ingrid;Gomes Genro, Ana Luisa;de Freitas Ferreira, Daniele;Janner Hamann, Jonas;Smanioto Barin, Juliano;Cichoski, Alexandre Jose;Fronza, Diniz;Both, Vanderlei;Wagner, Roger. And the article was included in Food Research International in 2020.Category: esters-buliding-blocks This article mentions the following:

Nuts are considered highly nutritious foods and a source of health-promoting compounds Therefore, the aim of this study was to evaluate the chem. composition (proximate composition, fatty acids, volatile compounds, total phenolics, squalene, and 灏?sitosterol) of eleven pecan cultivars harvested in Rio Grande do Sul State (Brazil) and investigate their oxidative stability by the Rancimat method. ‘Barton’ is the main cultivar produced in Brazil and presented the highest protein, linoleic acid, and linolenic acid values and the lowest saturated fatty acid values, which provide health benefits. ‘Mahan’ showed the highest oxidation induction time, both in extracted oil and ground samples, low abundance of lipid oxidation compounds, low polyunsaturated fatty acids, high levels of oleic acid and 灏?sitosterol, which suggests potential for storage. ‘Stuart’ and ‘Success’ had the highest total dietary fiber values. Moreover, anal. showed that ‘Chickasaw’ and ‘Success’ had large quantities of compounds correlated to lipid oxidation, suggesting low stability for long-term storage. These results imply that the physicochem. characteristics and proximate composition of pecan nut cultivars from southern Brazil have variable parameters that may depend on their genetic variability. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Category: esters-buliding-blocks).

5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) 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. 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.Category: esters-buliding-blocks

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

Changes in free and glycosidically bound volatile compounds of nectarine fruit during low-temperature storage was written by Zhang, Q.;Zhou, D. D.;Jiang, M. W.;Tu, K.. And the article was included in International Food Research Journal in 2022.Recommanded Product: 5-Ethyldihydrofuran-2(3H)-one This article mentions the following:

Free and glycosidically bound volatiles are two essential aroma compounds contributing to the flavor of nectarine fruits. To explore the relationship between free and bound volatiles in nectarine fruits during postharvest storage, they were first harvested and then subjected to the temperatures of 1, 5, and 8鎺矯 for 35 d, and the changes in volatile compounds, 灏?glucosidase (灏?Glu) activity, and the expression of UGT (UDP-glucosyltransferase) involved in the accumulation of bound linalool were determined Results showed that nectarine fruits stored at 5鎺矯 had the lowest contents of free volatile compounds due to damage from chilling injury, and the contents of esters and lactones decreased at 1 and 5鎺矯. The contents of bound volatiles increased during the early storage period, and decreased afterwards due to an increase in 灏?Glu activity. Corresponding to the higher contents of bound volatiles at 1鎺矯, the 灏?Glu activity in nectarine fruits stored at 1鎺矯 was significantly lower than that in nectarine fruits stored at the other two temperatures In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Recommanded Product: 5-Ethyldihydrofuran-2(3H)-one).

5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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: 5-Ethyldihydrofuran-2(3H)-one

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

Enantiomer separation of mandelates and their analogs on cyclodextrin derivative chiral stationary phases by capillary GC was written by Nie, Meng-Yan;Zhou, Liang-Mo;Wang, Qing-Hai;Zhu, Dao-Qian. And the article was included in Analytical Sciences in 2001.Related Products of 15399-05-0 This article mentions the following:

Enantiomer separation of mandelates and their analogs, which are important intermediates in asym. synthetic and pharmaceutical chem., was studied by capillary gas chromatog. using different cyclodextrin derivative chiral stationary phases (CD CSPs). The used cyclodextrin derivatives included permethylated 灏?CD (PMBCD), permethylated 绾?CD, heptakis(2,6-di-O-butyl-3-O-butyryl)-灏?CD, heptakis(2,6-di-O-pentyl-3-O-acetyl)-灏?CD and heptakis(2,6-di-O-nonyl-3-O-trifluoroacetyl)-灏?CD (DNTBCD), resp. Among all the CSPs used, PMBCD and DNTBCD exhibited the broadest and best enantioselectivity for all the racemates studied. Some thermodn. parameters were evaluated and an enthalpy-entropy compensation effect was observed in enantiomer separation processes of mandelates and their analogs. Based on thermodn. data and mol. mechanics calculations, the chiral recognition mechanism of mandelate derivatives on CD CSPs is discussed. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Related Products of 15399-05-0).

Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0) 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. 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 15399-05-0

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

Isovaleronitrile co-induced with its precursor, L-leucine, by herbivory in the common evening primrose stimulates foraging behavior of the predatory blue shield bug was written by Noge, Koji;Tamogami, Shigeru. And the article was included in Bioscience, Biotechnology, and Biochemistry in 2018.Category: esters-buliding-blocks This article mentions the following:

Herbivore-induced plant volatiles play important roles in plant-insect and plant-plant interactions. The common evening primrose, Oenothera biennis, is often infested by the flea beetle, Altica oleracea, on which the predatory blue shield bug, Zicrona caerulea, is usually found. This observation suggests that the predatory bug can discriminate infested plants from intact ones to locate its prey. In this study, L-leucine-derived nitrogen-containing compounds [isovaleronitrile (3-methylbutanenitrile), (E/Z)-isovaleraldoxime and 3-methyl-1-nitrobutane] and some terpenes were identified as a characteristic volatile blend from herbivore-infested O. biennis leaves by gas chromatog./mass spectrometry, chem. synthesis, and incorporation assays using deuterium-labeled L-leucine. Volatile emission was also elicited by exogenous Me jasmonate (MeJA), but not by mech. damage. L-Leucine accumulated temporarily in O. biennis leaves after MeJA treatment prior to isovaleronitrile emission. Behavioral assays revealed that Z. caerulea showed a strong preference for herbivore-infested leaves, their volatiles, and isovaleronitrile in laboratory conditions. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Category: esters-buliding-blocks).

Isopentyl 3-methylbutanoate (cas: 659-70-1) 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.Category: esters-buliding-blocks

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