Category: esters-buliding-blocks

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

The use of 13-methyltetradecanoic acid as an indicator of adipose tissue turnover was written by Klein, Roger A.;Halliday, David;Pittet, Philippe G.. And the article was included in Lipids in 1980.Recommanded Product: 3903-40-0 This article mentions the following:

13-Methyltetradecanoic acid (13-MTD) can be used as a structurally labeled marker for investigating the mobility of fatty acyl chains in adipose tissue in the rat. The presence of an ω-1-Me group allows easy quantitation by gas chromatog. and permits an assessment of any oxidation and chain elongation reactions with reincorporation of the label into the adipose tissue, since the iso-acyl chain is well resolved from odd or even-numbered homologous fatty acids with straight chains. The kinetics of uptake and loss of the structural label were different for samples taken from sites in the post abdominal, mesenteric, perirenal, pericardiac, and s.c. adipose tissue, as well as from the epididymal fat pads. Preliminary results in man confirm that the method is applicable to human clin. studies and that 13-MTD kinetics differ from adipose tissue taken from 3 different s.c. sites on the waist, arm, and thigh. In the experiment, the researchers used many compounds, for example, 12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0Recommanded Product: 3903-40-0).

12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0) 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.Recommanded Product: 3903-40-0

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 effect of two different UV absorbers combined with antioxidants on UV resistance of HDPE was written by Jiang, Tiankai;Mao, Zepeng;Qi, Yanli;Wu, Yuchen;Zhang, Jun. And the article was included in Polymers for Advanced Technologies in 2021.Computed Properties of C73H108O12 This article mentions the following:

In order to improve the aging resistance of HDPE, antioxidants (Irganox1010 and Irgafos168) are combined with UV absorber (UV-326 or UV-531). Analyses of UV-visible (UV-vis) and Fourier transform IR spectroscopy show that UV-326 has a better capacity of UV absorbance, but easier to migrate to the HDPE surface due to the bigger difference of solubility parameter with HDPE than UV-531. The mech. property indicates a better synergistic effect between UV-531 and antioxidants. With the single addition of antioxidant, the mech. property sharply decreased to low level during irradiation for 200 h. With single addition of UV absorber, the elongation at break of the sample can still be maintained at about 700% until irradiation for 600 h. When two different UV absorbers are used in combination with antioxidants, HDPE with UV-326 maintains high mech. property when irradiated for 1200 h, while the samples containing UV-531 still maintain good mech. property when irradiated for 1600 h. 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: 6683-19-8Computed Properties of C73H108O12).

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 typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 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.Computed Properties of C73H108O12

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

Enantioselectivity of Pseudomonas cepacia lipase for the acetylation of 2-hydroxy carboxylic acid esters was written by Sundholm, Oskari;Kanerva, Liisa T.. And the article was included in ACH – Models in Chemistry in 1998.Formula: C11H14O3 This article mentions the following:

Structurally different Et or Me 2-hydroxy carboxylates were resolved by Pseudomonas cepacia lipase-catalyzed acetylations with vinyl acetate in di-Et ether. One type of the alc. substrates (2-hydroxy-2-arylacetates and 2-hydroxy-3-arylpropionates) contained a hydroxy group at the stereocenter. These compounds were resolved with high enantioselectivity (ee 91-99%) at ca. 50% conversion. The other alc. substrates [threo-2-hydroxy-3-methylbutyrate and threo- or erythro-2-hydroxy-3-aryl-3-arylthio(or aryloxy)propionates] with two stereocenters generally resulted in enantiopure products, and the reactions stopped at 50% conversion. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Formula: C11H14O3).

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. 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.Formula: C11H14O3

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

Transesterifications over titanosilicate molecular sieves was written by Srinivas, D.;Srivastava, R.;Ratnasamy, P.. And the article was included in Catalysis Today in 2004.Quality Control of malonic acid dibutyl ester This article mentions the following:

Titanosilicate mol. sieves (TS-1, Ti-MCM-41 and amorphous TiO₂-SiO₂) catalyze transesterification reactions. Acidity measurements (pyridine adsorption-IR and NH₃-TPD) reveal the presence of only weak Lewis acid sites. Catalytic activity parallels the acid strength and increases in the order: TS-1<Ti-MCM-41<amorphous TiO₂-SiO₂. TS-1 efficiently catalyzes the transesterification of only linear esters (Et acetoacetate and di-Et malonate), but fails for cyclic esters like propylene carbonate. Ti-MCM-41 and amorphous TiO₂-SiO₂ are superior for the latter. The catalysts could be recycled without any loss in activity/selectivity. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Quality Control of malonic acid dibutyl ester).

malonic acid dibutyl ester (cas: 1190-39-2) 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.Quality Control of malonic acid dibutyl ester

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

Biodiesel production from biomass gasification tar via thermal/catalytic cracking was written by Laksmono, Nino;Paraschiv, Maria;Loubar, Khaled;Tazerout, Mohand. And the article was included in Fuel Processing Technology in 2013.COA of Formula: C12H22O4 This article mentions the following:

This paper is devoted to the study of valorization of tar from biomass gasification as a fuel for internal combustion engine. The methods selected were both thermal cracking and catalytic cracking in the presence of zeolite, magnesium oxide, and aluminum oxide catalyst. The chem. composition of the cracking product was analyzed by gas chromatog.-mass spectrometry, together with the physico-chem. properties determination (d., viscosity, higher heating value, and acidic value). Thermal cracking of biomass gasification tar gave a yield of biodiesel 73.67 weight% of feed. The cracking process in the presence of zeolite, magnesium oxide, and aluminum oxide catalysts gave a yield of biodiesel 62-75 weight%, 55-66 weight%, 67-71 weight% resp. The influence of the type and quantity of catalyst on production yield and properties of the produced bio-oil is highlighted. The produced bio-oil d. and heating value were close to the conventional diesel fuel. The viscosity and acidic value were found to be slightly higher than that of conventional diesel fuel. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6COA of Formula: C12H22O4).

Dimethyl decanedioate (cas: 106-79-6) 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. 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.COA of Formula: C12H22O4

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