Tag: 100-200

Volatile profiles of five jackfruit (Artocarpus heterophyllus Lam.) cultivars grown in the Mexican Pacific area was written by Barros-Castillo, Julio C.;Calderon-Santoyo, Montserrat;Cuevas-Glory, Luis F.;Pino, Jorge A.;Ragazzo-Sanchez, Juan A.. And the article was included in Food Research International in 2021.Category: esters-buliding-blocks This article mentions the following:

The volatile compounds of five kind of cultivars of jackfruit (Artocarpus heterophyllus Lam.) grown in Nayarit, Mexico, was researched by using extraction and chromatog. methods such as headspace-solid phase microextraction (HS-SPME) and gas chromatog.-mass spectrometry (GC-MS). Eighty-six volatile compounds were identified. The most prominent compounds in the analyzed cultivars were alkyl esters of 3-methylbutanoic acid. Et 3-methylbutanoate was the most abundant ester in FMC, JMC and RMC cultivars (190.7-961.2 μg/kg), whereas Bu 3-methylbutanoate (152.8-205.2 μg/kg) and pentyl 3-methylbutanoate (105.1-210.9 μg/kg) were predominant in DMC and BMC cultivars. By utilizing clustering statistical techniques such as principal component anal. was possible to identify certain esters compounds (number and concentration) to differentiate each cultivar. 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. 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. 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.Category: esters-buliding-blocks

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

Biochemical characterization of apple slices dried using low temperature and stored in modified atmosphere packaging was written by Cozzolino, Rosaria;Palumbo, Michela;Cefola, Maria;Capotorto, Imperatrice;Linsalata, Vito;Forte, Giovanna;Petriccione, Milena;De Giulio, Beatrice;Pace, Bernardo. And the article was included in Journal of Food Composition and Analysis in 2022.Recommanded Product: 868-57-5 This article mentions the following:

Apple slices (Pinova cv) dried at mild temperature (40°C), compared to 65°C dried slices, are enriched (up to about 50%) in polyphenols (e.g., catechin, epicatechin, quercetin 3-glucoside, quercetin derivatives). Chem. (dipping solutions) and phys. (packaging) treatments are key in controlling the enzymic browning of dried apple slices and maintain their nutritional content. In the present study we investigated the effects of dipping and packaging on the physicochem. properties of dried apple slices. Specifically, apple slices dried at 40°C were comparatively dipped in 1% calcium citrate (CC) or 1% citric acid (CA) and stored in active modified atm. (a-MA) or in passive (p-MA) for 100 days. A mild drying approach combined with dipping in CC and a-MA preservation, produced high quality dried apple slices, both in terms of sensory characteristics and color retention. Remarkably, upon this treatment, fruits exhibited an enhanced volatile profile that correlated with fresh and fruity apple notes. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Recommanded Product: 868-57-5).

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

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

Characterization of honey peach (Prunus persica (L.) Batsch) aroma variation and unraveling the potential aroma metabolism mechanism through proteomics analysis under abiotic stress was written by Li, Qianqian;Yang, Shupeng;Zhang, Rong;Liu, Shuyan;Zhang, Chaoyang;Li, Yi;Li, Jianxun. And the article was included in Food Chemistry in 2022.Quality Control of 5-Ethyldihydrofuran-2(3H)-one This article mentions the following:

Honey peach (Prunus persica (L.) Batsch) is a climacteric fruit with short storage period. Generally, the low temperature storage (LTS) technol. is implemented to lessen aroma loss and keep the quality. However, the LTS procedure brings about cold stress issues and affects the aroma metabolism It is essential to unravel the primary aroma and the corresponding metabolism mechanism through key proteins under abiotic stress. In this study, the primary components were characterized under LTS at 1°C during 0 to 40 days. Furthermore, the proteomics anal. was performed to acquire differentially expressed proteins to clarify the underlying metabolism mechanisms of the primary aroma and potential proteins. As a result, four proteins were considered as potential key proteins that associated with fatty acid and amino acid metabolism under cold stress. Addnl., this study provides theor. cornerstones for regulating and improving the quality of honey peach. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Quality Control of 5-Ethyldihydrofuran-2(3H)-one).

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. 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.Quality Control of 5-Ethyldihydrofuran-2(3H)-one

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

Synthesis of substituted porphyrins was written by Cheng, D. O.;LeGoff, Eugene. And the article was included in Tetrahedron Letters in 1977.Application of 2199-49-7 This article mentions the following:

3,4-Disubstituted pyrroles with HCHO and HCl or HBr in EtOH at reflux for several h then standing exposed to air for a few days to several weeks gave porphyrins unsubstituted in the meso positions. E.g., 3,4-dimethylpyrrole with HCHO and HBr gave 76% I (R = R1 = Me). Similarly, 3-acetyl-4-ethylpyrrole gave a mixture of 3 isomers of I (R, R1 = MeCO, Et) which on B2H6 reduction gave I (R = R1 = Et). In the experiment, the researchers used many compounds, for example, Ethyl 4-methyl-1H-pyrrole-3-carboxylate (cas: 2199-49-7Application of 2199-49-7).

Ethyl 4-methyl-1H-pyrrole-3-carboxylate (cas: 2199-49-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Application of 2199-49-7

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

Synthesis and Biological Activity of Anthranilic Diamide Derivatives Incorporating 1,3,4-oxadiazole or Nitrogen-containing Saturated Heterocyclic Moieties was written by Zhou, Wen-Juan;Zhang, Li;Xiao, Wei;Chen, He-Ju;Wu, Wen-Neng;Ouyang, Gui-Ping. And the article was included in Journal of Heterocyclic Chemistry in 2017.Name: Ethyl 2-(4-fluorophenyl)acetate This article mentions the following:

A series of novel anthranilic diamide derivatives incorporating 1,3,4-oxadiazole I (R = 4-ClC₆H₄CH₂, 2,4-Cl₂C₆H₃, pyridin-2-yl, etc.) or nitrogen-containing saturated heterocyclic moieties II (X = morpholin-4-yl, cyclopropylamino, 1H-imidazol-1-yl, etc.) were synthesized, characterized, and evaluated for bacteriostatic activity against three phytopathogenic bacteria Xanthomonas oryzae pv. Oryzae (Xoo), Xanthomonas axonopodis pv. Citri (Xac), Ralstonia solanacearum (R. solanacearum). The preliminary biol. results indicated that most of the synthesized compounds exhibit bacteriostatic activity against three phytopathogenic bacteria. Among these compounds, compounds II (X = 1H-pyrrol-1-yl, 1H-imidazol-1-yl, cyclopentylamino) displayed better antibacterial activity. In the test with concentration of 200 μg/mL, antibacterial activity of compounds II (X = cyclopentylamino, 4-oxopiperidin-1-yl) was 96%. In particular, the bacteriostatic activity displayed by compound II (X = cyclohexylamino) against Xoo was similar to the one displayed by com. drug bismerthiazol. In the experiment, the researchers used many compounds, for example, Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2Name: Ethyl 2-(4-fluorophenyl)acetate).

Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2) 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.Name: Ethyl 2-(4-fluorophenyl)acetate

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

Four pyrrole derivatives used as building blocks in the synthesis of minor-groove binders was written by Kennedy, Alan R.;Khalaf, Abedawn I.;Scott, Fraser J.;Suckling, Colin J.. And the article was included in Acta Crystallographica, Section E: Crystallographic Communications in 2017.Application of 5930-92-7 This article mentions the following:

Nitropyrrole-based compounds, I [X = H, pentynyl], II and III are intermediates used in the synthesis of modified DNA minor-groove binders. In all four compounds, the nitro groups lie in the plane of the pyrrole ring. In compounds I [X = H, pentynyl], the ester groups also lay in the plane of the pyrrole ring. In compound II, both of the other substituents lay out of the plane of the pyrrole ring. In the case of compound III, the coplanarity extended to the second pyrrole ring and through both amide groups. In the crystals of all four compounds, layer-like structures were formed, via a combination of N-H···O and C-H···O hydrogen bonds for I [X = H], II and III, but by only C-H···O hydrogen bonds for I [X = pentynyl]. In the experiment, the researchers used many compounds, for example, Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7Application of 5930-92-7).

Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Application of 5930-92-7

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

Antimicrobial Activities of Plant Extracts against Solanum tuberosum L. Phytopathogens was written by Steglinska, Aleksandra;Bekhter, Anastasiia;Wawrzyniak, Pawel;Kunicka-Styczynska, Alina;Jastrzabek, Konrad;Fidler, Michal;Smigielski, Krzysztof;Gutarowska, Beata. And the article was included in Molecules in 2022.COA of Formula: C6H12O2 This article mentions the following:

The purpose of the study was to select an environmentally friendly plant biopesticide to protect seed potatoes against phytopathogens. The scope included the evaluation of the antimicrobial activities of 22 plant water extracts, 22 water-glycol extracts, and 3 subcritical carbon dioxide extracts using the agar diffusion method against 10 potato phytopathogens. For the most effective extracts, minimal inhibitory concentration (MIC), chem. composition anal. by gas chromatog.-mass spectrometry and in situ assays on seed potatoes were performed. Garlic water extract was finally selected as the most effective in phytopathogen growth inhibition, both in vitro and in situ, with MIC values ranging between 6.3-25 mg/mL. 5-Hydroxymethylfurfural was determined to be the main component of this extract (33.24%). Garlic water extract was proposed as a potential biopesticide against potato phytopathogens. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5COA of Formula: C6H12O2).

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, 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.COA of Formula: C6H12O2

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

3-Substituted 2-isocyanopyridines as versatile convertible isocyanides for peptidomimetic design was written by Hollanders, Charlie;Elsocht, Mathias;Van der Poorten, Olivier;Jida, Mouhamad;Renders, Evelien;Maes, Bert U. W.;Ballet, Steven. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2021.Recommanded Product: 14667-47-1 This article mentions the following:

We report the use of 3-substituted 2-isocyanopyridines as convertible isocyanides in Ugi four-component reactions. The N-(3-substituted pyridin-2-yl)amide Ugi products can be cleaved by amines, alcs., and water with Zn(OAc)₂ as a catalyst. In addition, the applicability of the method was demonstrated in constrained di-/tripeptides bearing acid and base sensitive protective groups obtained via Ugi-4CR post-condensation modifications. In the experiment, the researchers used many compounds, for example, Methyl 2-aminonicotinate (cas: 14667-47-1Recommanded Product: 14667-47-1).

Methyl 2-aminonicotinate (cas: 14667-47-1) 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.Recommanded Product: 14667-47-1

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

Alternative control of grape rots by essential oils of two Eucalyptus species was written by Pedrotti, Carine;Marcon, Angela Rossi;Delamare, Ana Paula Longaray;Echeverrigaray, Sergio;Ribeiro, Rute Terezinha da Silva;Schwambach, Joseli. And the article was included in Journal of the Science of Food and Agriculture in 2019.SDS of cas: 659-70-1 This article mentions the following:

BACKGROUND : Essential oils (EOs) are volatile natural compounds produced by plant secondary metabolism, and some of them exhibit antimicrobial activity. The objective of the present study was to determine the chem. composition the EOs of Eucalyptus staigeriana and Eucalyptus globulus, and their effect in vitro and in vivo against Botrytis cinerea and Colletotrichum acutatum, the most important fungal rot diseases of grapes. Moreover, grapes collected from field experiments were used to evaluate the impact of the alternative control on the alc. fermentation and wine composition RESULTS : The major compound of E. staigeriana EO were citral 30.91% (19.74% geranial, 11.17% neral), 1.8-cineole (24.59%) and limonene (19.47%), while 1.8-cineole represented 68.26% of E. globulus EO. The two EOs showed in vitro antifungal activity against both pathogens. Eucalyptus staigeriana EO exhibited the highest activity inhibiting mycelial growth (MG) and conidial germination at 0.5μL mL^-1. Moreover, this EO was able to reduce the incidence and severity of gray rot caused by B. cinerea and the severity of ripe rot caused by C. acutatum The alternative control did not significantly influence alc. fermentation, the physicochem. characteristics, and the volatile composition of wines. CONCLUSION : These results are promising and indicate that E. staigeriana EO might be further investigated as a natural alternative for the control of fungal rots on wine grapes. © 2019 Society of Chem. Industry. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1SDS of cas: 659-70-1).

Isopentyl 3-methylbutanoate (cas: 659-70-1) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.SDS of cas: 659-70-1

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

The influence of polyphenol supplementation on ester formation during red wine alcoholic fermentation was written by Ling, Mengqi;Qi, Mengyao;Li, Siyu;Shi, Ying;Pan, Qiuhong;Cheng, Chifang;Yang, Weiming;Duan, Changqing. And the article was included in Food Chemistry in 2022.Safety of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate This article mentions the following:

Pre-fermentative polyphenol supplementation in industrial scales (100-hL) and simulated fermentation (350 mL clarified juice) were conducted. The results showed that in practical winemaking, adding QCE (quercetin, caffeic acid and ellagic acid) increased acetate concentrations in wines and extra grape seed tannins (T) enhanced the effect of QCE supplementation. In simulated fermentation with clarified juice, the synergy effect of QCE and T was evidenced that ester formation was only promoted through mixed QCET supplementation. Besides, QCE supplementation benefited the formation of 4-vinylcatechol adducted malvidin-3-O-(acetyl/coumaroyl)-glucoside and decreased other anthocyanin derivatives derived from pyruvic acid and acetaldehyde, leading more pyruvic acid and acetaldehyde left in yeast to enhance the metabolic fluxes of esters. Findings manifested the connection between the formation of esters and anthocyanin derivatives during red wine alc. fermentation, which would be influenced by the phenolic matrix. This work could provide a perspective in winemaking industry for modulating aroma profile via polyphenol supplementation. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Safety 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 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.Safety of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate

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