Tag: 100-200

Influence of 6 different strains of yeasts on polyphenol composition of Barbera wines obtained with delayed extraction of anthocyanins was written by Bosso, A.;Guaita, M.;Follis, R.;Di Stefano, R.. And the article was included in Rivista di Viticoltura e di Enologia in 2002.Application of 15399-05-0 This article mentions the following:

Six strains of Saccharomyces cerevisiae yeasts were used in the production of red Barbera wines. The wine d., ethanol, total anthocyanins, total flavonoids, proanthocyanidins, total polyphenols, flavans, volatile acidity, acetaldehyde, SO₂, pH, color, volatile compounds, and sensory properties (flavor, taste) were evaluated during grape maceration and wine aging. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Application of 15399-05-0).

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

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

Elaboration of double emulsion-based polymeric capsules for fragrance was written by Stasse, Margot;Ribaut, Tiphaine;Heroguez, Valerie;Schmitt, Veronique. And the article was included in Colloid and Polymer Science in 2021.COA of Formula: C10H18O2 This article mentions the following:

Abstract: We aim at encapsulating fragrances made of a variety of lipophilic species to slow down their diffusion. Our strategy is to develop capsules by polymerizing the water intermediate phase of an oil-in-water-in-oil double emulsion. In other terms, our system consists in a direct emulsion of fragrance (O1) in a water phase (W) containing monomer, initiator, and cross-linker. To obtain the double emulsion, this direct emulsion, stabilized by a hydrophilic surfactant, is itself dispersed in an external lipophilic solvent used in perfumery (O2) and stabilized by a lipophilic surfactant. Polymerization of the intermediate water phase aims at obtaining a 3D network. Differently from nowadays-proposed capsules, this strategy allows polymerization only taking place in the water phase rather in the phase containing the fragrance. Moreover, the obtained 3D network is supposed to play the role of an effective barrier limiting the diffusion of the inner lipophilic species towards either the external solvent or air. Such an approach implies the combination of a formulation step to elaborate the double emulsion using two antagonistic surfactants, a hydrophilic one and a lipophilic one, and of the polymerization of the intermediate phase. Insertion of the polymerizable species in the double emulsion shall not destabilize it. Some monomers exhibiting interfacial affinity and interfering with the formulation of the double emulsion have to be avoided. By varying the nature of the monomers and the cross-linker to monomer ratio, capsules with high encapsulation efficiencies and with various mech. properties have been obtained. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9COA of Formula: C10H18O2).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) 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, including apples, durians, pears, bananas, pineapples, and strawberries. 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.COA of Formula: C10H18O2

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

Synthesis, structure, absorption and fluorescence of Pechmann dye heteroanalogues was written by Aysha, Tarek;Lunak, Stanislav Jr.;Lycka, Antonin;Vynuchal, Jan;Elias, Zdenek;Ruzicka, Ales;Padelkova, Zdenka;Hrdina, Radim. And the article was included in Dyes and Pigments in 2013.Synthetic Route of C9H10O3S This article mentions the following:

Three N-analogs of Pechmann dye with identical aryl groups in the 5, 5′-positions (aryl = Ph, 2-naphthyl, 2-thienyl) and carboxy ester groups in the 3,3′-positions were synthesized by oxidative dimerization of the corresponding 5-aryl-pyrrolinone esters. Derivatives with improved solubility in most organic solvents were prepared by subsequent N-methylation. The dyes were confirmed as E isomers, i.e. holding an all-trans 1,6-diaryl-1,3,5-hexatriene backbone, with slight torsion of central CC bond by X-ray diffraction and d. functional theory (DFT) calculations No E/Z photoisomerization was observed Full assignment of ¹H and ¹³C NMR signals was performed. The absorption spectra are quite similar with the maxima in the range 572 nm (aryl = phenyl)-643 nm (aryl = 2-thienyl) in accordance with time dependent DFT calculations of excitation energies. No fluorescence was observed in solution, while all compounds fluoresce in low temperature solvent glass (77 K) and a weak solid-state fluorescence of Ph and 2-naphthyl derivatives in red/IR region was detected. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8Synthetic Route of C9H10O3S).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) 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.Synthetic Route of C9H10O3S

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

Analysis and comparison of volatile components in purple rice sweet wine with different sterilization treatments by electronic nose and headspace gas chromatography-ion mobility spectrometry was written by Peng, Xu-yi;Zheng, Jing-shao;Liu, Yu-hang;Xu, Lin-huan;Kuang, Wei-yang;Huang, Wei. And the article was included in Xiandai Shipin Keji in 2021.Product Details of 868-57-5 This article mentions the following:

In order to select a more suitable sterilization method and maintain the original flavor of purple rice sweet wine as much as possible, this article used electronic nose, headspace gas chromatog.-ion mobility spectroscopy (HS-GC-IMS) to analyze and compare the volatile components of four groups of samples of heat sterilization, irradiation sterilization, ultra-high pressure sterilization and unsterilized control. The results of electronic nose test showed that the discrimination between the samples was good, and the differences of volatile components were mainly caused by nitrogen oxides, alcs. and aldehydes and ketones, methyls, sulfides. HS-GC-IMS detection and identification found that the 4 groups of samples shared 42 substances in 7 categories of alcs., esters, aldehydes, ketones, acids, olefins and alkanes. The relative content of alcs. was the highest (62.03%∼65.73%), followed by esters (12.70%∼13.93%) and ketones (9.36%∼11.59%), the sterilization method had a great influence on the relative content of each component. The relative odor activity value (ROAV) showed that there were 11 key flavor compounds in the samples, mainly including Et 2-methylbutyrate (69.39∼100), acetaldehyde (38.61∼42.05), Et isovalerate (18.16∼27.23), isoamyl alc. (9.91∼18.08), butyraldehyde (14.13∼18.06), Et isobutyrate (8.22∼12.18). Both linear discriminant anal. and nearest neighbor algorithm anal. showed that the volatile components of ultra-high pressure and unsterilized samples were the most similar, followed by irradiation and heat sterilization samples, indicating that ultra-high pressure sterilization had the least effect on the aroma of samples, which was the best sterilization method for purple rice wine. The results of this study provide reference value for the selection of sterilization methods for sweet fermented rice. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Product Details of 868-57-5).

Methyl2-methylbutyrate (cas: 868-57-5) 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. 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 868-57-5

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

Minor groove DNA binders as antimicrobial agents. 1. Pyrrole tetraamides are potent antibacterials against vancomycin resistant enterococci and methicillin resistant Staphylococcus aureus was written by Dyatkina, Natalia B.;Roberts, Christopher D.;Keicher, Jesse D.;Dai, Yuqin;Nadherny, Joshua P.;Zhang, Wentao;Schmitz, Uli;Kongpachith, Ana;Fung, Kevin;Novikov, Alexander A.;Lou, Lillian;Velligan, Mark;Khorlin, Alexander A.;Chen, Ming S.. And the article was included in Journal of Medicinal Chemistry in 2002.COA of Formula: C7H8N2O4 This article mentions the following:

A new series of short pyrrole tetraamides are described whose submicromolar DNA binding affinity is an essential component for their strong antibacterial activity. This class of compounds is related to the linked bis-netropsins and bis-distamycins, but here, only one amino-pyrrole-carboxamide unit and an amidine tail is connected to either side of a central dicarboxylic acid linker. The highest degree of DNA binding, measured by compound-induced changes in UV melting temperatures of an AT-rich DNA oligomer, was observed for flat, aromatic linkers with no inherent bent, i.e., terephthalic acid or 1,4-pyridine-dicarboxylic acid. However, the antibacterial activity is critically linked to the size of the N-alkyl substituent of the pyrrole unit. None of the tetraamides with the commonly used methyl-pyrrole showed antibacterial activity. Isoamyl- or cyclopropylmethylene-substituted dipyrrole derivatives have the min. inhibitory concentrations in the submicromolar range. In vitro toxicity against human T-cells was studied for all compounds The degree to which compounds inhibited cell growth was neither directly correlated to DNA binding affinity nor directly correlated to antibacterial activity but seemed to depend strongly on the nature of the N-alkyl pyrrole substituents. In the experiment, the researchers used many compounds, for example, Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7COA of Formula: C7H8N2O4).

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. 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.COA of Formula: C7H8N2O4

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

I₂Cu-mediated self-sorting domino reaction of aryl β-ketoesters into symmetrical 2-carboalkoxy-1,4-enediones: application to synthesis of pyrazine, β-carboline and quinoxalines was written by Satish, Gandhesiri;Ilangovan, Andivelu. And the article was included in RSC Advances in 2015.Name: Ethyl 3-oxo-3-(thiophen-2-yl)propanoate This article mentions the following:

A self-sorting domino reaction of aryl β-ketoesters RC₆H₄C(O)CH₂C(O)OCH₂CH₃ into sym. E:Z mixture of 1,4-enediones RC(O)C(CO₂CH₂CH₃):CHC(O)R was reported by an I₂/Cu system. The reaction proceeds through tandem iodination, self-dimerization and Krapcho dealkoxycarbonylation in one pot under open air condition. Further, E:Z mixture of 1,4-enediones RC(O)C(CO₂CH₂CH₃):CHC(O)R were successfully employed for the synthesis of bioactive pyrazine, β-carboline and quinoxalines I via aza-Michael addition, intramol. cyclization and C-C bond cleavage of 1,3-dicarbonyl unit under mild reaction condition. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8Name: Ethyl 3-oxo-3-(thiophen-2-yl)propanoate).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) 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. 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.Name: Ethyl 3-oxo-3-(thiophen-2-yl)propanoate

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

Network Analysis of the Herb-Drug Interactions of Citrus Herbs Inspired by the “Grapefruit Juice Effect” was written by Lu, Jintao;Zhang, Dan;Zhang, Xiaomeng;Sa, Rina;Wang, Xiaofang;Wu, Huanzhang;Lin, Zhijian;Zhang, Bing. And the article was included in ACS Omega in 2022.Related Products of 105-87-3 This article mentions the following:

This study was performed to investigate the herb-drug interactions (HDIs) of citrus herbs (CHs), which was inspired by the “grapefruit (GF) juice effect”. Based on network anal., a total of 249 components in GF and 159 compounds in CHs exhibited great potential as active ingredients. Moreover, 360 GF-related genes, 422 CH-related genes, and 111 genes associated with drug transport and metabolism were collected, while 25 and 26 overlapping genes were identified. In compound-target networks, the degrees of naringenin, isopimpinellin, apigenin, sinensetin, and isoimperatorin were higher, and the results of protein-protein interaction indicated the hub role of UGT1A1 and CYP3A4. Conventional drugs such as erlotinib, nilotinib, tamoxifen, theophylline, venlafaxine, and verapamil were associated with GF and CHs via multiple drug transporters and drug-metabolizing enzymes. Remarkably, GF and CHs shared 48 potential active compounds, among which naringenin, tangeretin, nobiletin, and apigenin possessed more interactions with targets. Drug metabolism by cytochrome P 450 stood out in the mutual mechanism of GF and CHs. Mol. docking was utilized to elevate the protein-ligand binding potential of naringenin, tangeretin, nobiletin, and apigenin with UGT1A1 and CYP3A4. Furthermore, in vitro experiments demonstrated their regulating effect. Overall, this approach provided predictions on the HDIs of CHs, and they were tentatively verified through mol. docking and cell tests. Moreover, there is a demand for clin. and exptl. evidence to support the prediction. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Related Products of 105-87-3).

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

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

Impact of Water on Odor-Active Compounds in Fermented and Dried Cocoa Beans and Chocolates Made thereof was written by Ullrich, Lisa;Neiens, Silva;Huhn, Tilo;Steinhaus, Martin;Chetschik, Irene. And the article was included in Journal of Agricultural and Food Chemistry in 2021.Related Products of 706-14-9 This article mentions the following:

The impact of water on odor-active compounds in fermented and dried cocoa beans as well as in chocolate either produced by a novel processing (NPC) or a traditional processing (TPC) technol. from the same batch of cocoa beans was investigated in this study. Quantitation of selected key odorants revealed significantly higher concentrations of Strecker aldehydes such as 3-(methylsulfanyl)propanal (66-fold) and phenylacetaldehyde (50-fold) after water treatment of the cocoa beans. The comparison of the two chocolates showed that higher amounts of the Strecker aldehydes 2-methylbutanal, 3-methylbutanal, and phenylacetaldehyde are released with water in the NPC (24-fold to 39-fold), compared to the TPC (7.3-fold-11-fold). In addition to Strecker aldehydes, the concentrations of many further characteristic key odorants of cocoa and chocolate increased after water treatment. Based on the results, a more intense retronasal odor perception of the analyzed compounds is expected due to their release during consumption in contact with saliva. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Related Products of 706-14-9).

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.Related Products of 706-14-9

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

Tuning Azoheteroarene Photoswitch Performance through Heteroaryl Design was written by Calbo, Joaquin;Weston, Claire E.;White, Andrew J. P.;Rzepa, Henry S.;Contreras-Garcia, Julia;Fuchter, Matthew J.. And the article was included in Journal of the American Chemical Society in 2017.Category: esters-buliding-blocks This article mentions the following:

A systematic computational and exptl. study to elucidate the origin of the long thermal half-lives and excellent addressability of the arylazopyrazoles is reported, and this understanding is used to determine important structure-property relationships for a wide array of comparable azoheteroaryl photoswitches. The authors identify compounds with Z isomer half-lives ranging from seconds to hours, to days and to years, and variable absorption characteristics, all through tuning of the heteroaromatic ring. Conformation perhaps plays the largest role in determining such properties: the compounds with the longest isomerization half-lives adopt a T-shaped ground state Z isomer conformation and proceed through a T-shaped isomerization pathway, whereas the most complete photoswitching is achieved for compounds that have a twisted (rather than T-shaped) Z isomer conformation. By balancing these factors, the authors report a new azopyrazole 3pzH, which can be quant. switched to its Z isomer ( > 98%) with 355 nm irradiation, near-quant. (97%) switched back to the E isomer with 532 nm irradiation, and has a very long half-life for thermal isomerization (t_1/2 = 74 d at 25 °C). In the experiment, the researchers used many compounds, for example, Ethyl 4-methyl-1H-pyrrole-3-carboxylate (cas: 2199-49-7Category: esters-buliding-blocks).

Ethyl 4-methyl-1H-pyrrole-3-carboxylate (cas: 2199-49-7) 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. 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. Category: esters-buliding-blocks

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

Synthesis of salicylates from anionically activated aromatic trifluoromethyl group was written by Xie, Huilin;Lin, Chuankai;Wang, Ruixiang;Liu, Jin-Biao. And the article was included in Tetrahedron Letters in 2022.HPLC of Formula: 118-61-6 This article mentions the following:

An efficient approach to salicylates via a novel transformation of anionically activated aromatic trifluoromethyl group is described. 2-(Trifluoromethyl)phenol reacts with phenols/alcs. under alk. conditions to afford the corresponding aryl/alkyl salicylates in high yields. Mechanism studies indicated that the carbonyl oxygen atom of ester is from the H₂O in the solvent. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6HPLC of Formula: 118-61-6).

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

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