Category: esters-buliding-blocks

Composition and insecticide potential against Tribolium castaneum of the fractionated essential oil from the flowers of the Tunisian endemic plant Ferula tunetana Pomel ex Batt was written by Baccari, Wiem;Znati, Mansour;Zardi-Bergaoui, Afifa;Chaieb, Ikbel;Flamini, Guido;Ascrizzi, Roberta;Ben Jannet, Hichem. And the article was included in Industrial Crops and Products in 2020.Category: esters-buliding-blocks This article mentions the following:

For several years, plant derived substances, in particular essential oils, have been the subject of increasing attention in their safe and ecofriendly application to crops, as a powerful alternative to chem. insecticides. For this reason, the essential oil isolated from flowers of Ferula tunetana, a Tunisian endemic plant, was investigated for the first time for its chem. profile, and its toxicity and repellency effects against Tribolium castaneum (Herbst) adults. The anal. by gas chromatog. coupled with mass spectrometry (GC/MS) led to determine 92.8-99.1% of the total oil (FEO) and its fractions (F₁-F₁₂) obtained every 15 min during the hydrodistillation process. The chem. anal. allowed to identify 77 compounds a-Pinene (14.3%), a monoterpene hydrocarbon, was the major compound of the raw essential oil. Relatively high amounts of oxygenated sesquiterpenes (44.9-76.8%) were detected, consisting mainly of epi-α-muurolol (3.6-9.5%), himachalol (6.8%) and β-chenopodiol (5.1-7.1%). Regarding the repellency assay, results demonstrated that flowers essential oil of F. tunetana and its fractions displayed interesting repellent property (93%). The median LD (LD₅₀) of the topical application of the oil was 10.44%. Fumigation with the raw essential oil gave a LD₅₀ of 161.89μL/L air. The overall data suggest that the F. tunetana essential oil might be used to protect stored products from pest attacks, but further studies are needed in order to better understand the synergistic relationship between the phytochems. contained in the essential oil. 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. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Category: esters-buliding-blocks

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

Evaluation of the Oxidation of Rice Husks with Sodium Hypochlorite Using Gas Chromatography-Mass Spectrometry and Direct Analysis in Real Time-Mass Spectrometry was written by Wang, Shou-Ze;Fan, Xing;Zheng, Ai-Li;Lu, Yao;Wei, Xian-Yong;Zhao, Yun-Peng;Wang, Rui-Yu;Dou, You-Quan;Wang, Ying-Hua;Wang, Chu-Fan;Zhang, Fan;Shen, Yong;Li, Chun-Yan;Liu, Zheng;Liu, De-Ying. And the article was included in Analytical Letters in 2014.Application In Synthesis of Dimethyl decanedioate This article mentions the following:

Rice husk powder was oxidized in aqueous sodium hypochlorite solution under mild conditions with different reaction times. Fourier transform IR spectroscopy, gas chromatog.-mass spectrometry (GC-MS), and direct anal. in real time-mass spectrometry (DART-MS) were used to analyze the oxidation products. Results showed that oxidation was a feasible way to depolymerize the macromols. in the biomass and convert hydroxyl groups to carboxyl groups. In total, 113 organic compounds in oxidation products with mol. mass less than 500 Da were identified using GC-MS. As an ambient ionization technique, DART-MS was applied to the determination of biomass derivatives and revealed mass distribution and mol. structure information for the rice husk oxidation products. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Application In Synthesis of Dimethyl decanedioate).

Dimethyl decanedioate (cas: 106-79-6) 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. 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 In Synthesis of Dimethyl decanedioate

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

Application of composts and potassium sulphate on root rot incidence, morphological growth, yield components, oil content and constitutes of marjoram plants (Majorana hortensis L.) was written by Eisa, El-Sayed E. A.;Meligy, Manal M.;Ziedan, El- Sayed H. E.. And the article was included in Biocatalysis and Agricultural Biotechnology in 2022.Product Details of 105-87-3 This article mentions the following:

Isolation of root rot tissue of diseased marjoram plants, yielded isolates fungal genera of Fusarium spp. and Rhizoctonia solani. Isolates of F. monoliforme and F. oxysporum, causing the highest root rot percentage and disease severity of marjoram plants in pot experiment In the field, soil amendement with either composts of sugarcane bagasse, soybean straw and rice straw and in combination with potassium sulfate at (50 or 75 kg/feddan.). Obtained indicated that, application of rice straw compost in combination with potassium sulfate (K2O) at 75 kg was the best treatment reduced root rot incidence of marjoram plants and highly significantly increased, plant height, fresh and dry weigh, yield components, content and percentage of essential oil as well in volatile oil high percentage of terpinene -4-ol (42.9%). Meanwhile, the high percentage of linalyl acetate (34.6%) in the application of (K2O) at 75 kg/feddan combined with soybean compost and carvacrol (32.3%) in the application of (K2O) at 75 kg/feddan. So, integration application of composts with (K2O) could be used as alternative strategies to fungicides for controlling root rot disease in marjoram, enhanching plant growth, yield components and constitutes of essential oil. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Product Details of 105-87-3).

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

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

Pyrrole studies. VI. The N-H stretching frequencies of substituted pyrroles: methyl and carbethoxy substituents was written by Jones, R. Alan;Moritz, A. G.. And the article was included in Spectrochimica Acta in 1965.Name: Ethyl 4-methyl-1H-pyrrole-3-carboxylate This article mentions the following:

The ir spectra of some substituted pyrroles were examined in the N-H stretching region under high resolution in CCl₄. In all cases 2 concentration-independent bands were observed. For compounds with a carbethoxy group in the α position, this is attributed to rotational isomerism. In other cases the 2nd band arises from interaction with the out-of-plane deformation vibration of the N-H group, producing a hot band. An analysis of the data for pyrroles containing Me and carbethoxy substituents, shows that the effect of each group on the N-H stretching frequency is independent of other substituents and is additive. The frequencies can be represented by a single equation, ν_NH = 3496 – 9n_αCH₃ + 2n_βCH₃ – 13n_βCO₂Et – {¹⁴₃₁n_αCO₂Et, where n_α and n_β are the number of substituents in the α and β positions, resp. In the last term, the coefficient is 14 or 31. In the experiment, the researchers used many compounds, for example, Ethyl 4-methyl-1H-pyrrole-3-carboxylate (cas: 2199-49-7Name: Ethyl 4-methyl-1H-pyrrole-3-carboxylate).

Ethyl 4-methyl-1H-pyrrole-3-carboxylate (cas: 2199-49-7) 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. 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.Name: Ethyl 4-methyl-1H-pyrrole-3-carboxylate

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

An integrated approach toward NanoBRET tracers for analysis of GPCR ligand engagement was written by Killoran, Michael P.;Levin, Sergiy;Boursier, Michelle E.;Zimmerman, Kristopher;Hurst, Robin;Hall, Mary P.;Machleidt, Thomas;Kirkland, Thomas A.;Ohana, Rachel Friedman. And the article was included in Molecules in 2021.Product Details of 330794-35-9 This article mentions the following:

Gaining insight into the pharmacol. of ligand engagement with G-protein coupled receptors (GPCRs) under biol. relevant conditions is vital to both drug discovery and basic research. NanoLuc-based bioluminescence resonance energy transfer (NanoBRET) monitoring competitive binding between fluorescent tracers and unmodified test compounds has emerged as a robust and sensitive method to quantify ligand engagement with specific GPCRs genetically fused to NanoLuc luciferase or the luminogenic HiBiT peptide. However, development of fluorescent tracers is often challenging and remains the principal bottleneck for this approach. One way to alleviate the burden of developing a specific tracer for each receptor is using promiscuous tracers, which is made possible by the intrinsic specificity of BRET. Here, we devised an integrated tracer discovery workflow that couples machine learning-guided in silico screening for scaffolds displaying promiscuous binding to GPCRs with a blend of synthetic strategies to rapidly generate multiple tracer candidates. Subsequently, these candidates were evaluated for binding in a NanoBRET ligand-engagement screen across a library of HiBiT-tagged GPCRs. Employing this workflow, we generated several promiscuous fluorescent tracers that can effectively engage multiple GPCRs, demonstrating the efficiency of this approach. We believe that this workflow has the potential to accelerate discovery of NanoBRET fluorescent tracers for GPCRs and other target classes. In the experiment, the researchers used many compounds, for example, tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylcarbamate (cas: 330794-35-9Product Details of 330794-35-9).

tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylcarbamate (cas: 330794-35-9) 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° 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. Product Details of 330794-35-9

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

Effects of Alkyl Chain Length of Aliphatic Dicarboxylic Ester on Degradation Properties of Aliphatic-Aromatic Water-Soluble Copolyesters for Warp Sizing was written by Li, Manli;Jin, Enqi;Qiao, Zhiyong;Zhao, Rongli. And the article was included in Fibers and Polymers in 2018.HPLC of Formula: 106-79-6 This article mentions the following:

In order to study the effects of alkyl chain length of aliphatic dicarboxylic ester (ADE) monomers on enzymic and hydrolytic degradation properties of aliphatic-aromatic water-soluble copolyesters for warp sizing, di-Me terephthalate, di-Me isophthalate-5-sulfonic sodium, and ADE monomers with various alkyl chain lengths were copolymerized through a two-step method, i.e. transesterification and polycondensation. The enzymic and hydrolytic degradation properties of the copolyesters were studied in terms of reduction rates of mol. weight, glass transition temperatures, and surface morphol. after being cultivated for 24-96 h. It was found that, enzymic degradation of the copolyesters strongly depended on alkyl chain length of ADE monomers. After being enzymically degraded for 96 h, reduction rate of mol. weight of the copolyester using di-Me malonate as ADE monomers could reach 22.2%. Meanwhile, the hydrolytic degradation of the copolyesters was not directly related to the alkyl chain length. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6HPLC of Formula: 106-79-6).

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

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

Semi-volatile organic compounds in fine particulate matter on a tropical island in the South China Sea was written by Liu, Zheng;Sun, Yuxin;Zeng, Yuan;Guan, Yufeng;Huang, Yuqi;Chen, Yuping;Li, Daning;Mo, Ling;Chen, Shejun;Mai, Bixian. And the article was included in Journal of Hazardous Materials in 2022.Category: esters-buliding-blocks This article mentions the following:

Measurements of hazardous semi-volatile organic compounds (SVOCs) in remote tropical regions are rare. In this study, polycyclic aromatic compounds (PACs) [including polycyclic aromatic hydrocarbons (PAHs), nitrated PAHs (NPAHs), and oxygenated PAHs (OPAHs)], organophosphate esters (OPEs), and phthalic acid esters (PAEs) were measured in fine particulate matter (PM₂.₅) at Yongxing Island in the South China Sea (SCS). The concentrations of PACs (median = 53.5 pg/m³) were substantially low compared with previous measurements. The concentration weighted trajectory (CWT) model showed that the eastern and southern China was the main source region of PAC, occurring largely during the northeast (NE) monsoon. The PM2.5 showed remarkably high concentrations of OPEs (median = 3231 pg/m³) and moderate concentrations of PAEs (13,013 pg/m³). Some Southeast Asian countries were largely responsible for their higher concentrations, driven by the tropical SCS monsoons. We found significant atm. loss of the SVOCs, which is an explanation for the low concentrations of PACs. Enhanced formation of N/OPAHs originated from tropical regions was also observed The pos. matrix factorization model was applied to apportion the SVOC sources. The results, as well as correlation analyses of the SVOC concentrations, further indicate insignificant local sources and enhanced atm. reactions on this island. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Category: esters-buliding-blocks).

Dicyclohexyl phthalate (cas: 84-61-7) 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. 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.Category: esters-buliding-blocks

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

Valuation and study of the activity of an essential oil extracted from a medicinal plant myrtle was written by Boussak, Hassina;Demim, Soraya;Hammadou, Souad;Loucif Seiad, Lynda. And the article was included in Materials Today: Proceedings in 2022.Name: (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate This article mentions the following:

The proposed study is to assess the inhibitory effect of a common myrtus plant species on strains responsible for urinary tract infections by the application of two different techniques, hydrodistillation and extraction by Soxhlet in order to obtain better yields and good characteristics of the oil. The yields obtained by hydrodistillation and Myrtle soxhlet are resp.: 10.06 and 13.33%. The physicochem. characterizations were carried out by CGSM. The antibacterial activity of Myrtle oil against Escherichia coli was remarkable with inhibition diameters greater than 20 mm. Myrtle oil inhibits the growth of yeasts and weakens the growth of Staphylococcus aureus which is said to have a bacteriostatic effect. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Name: (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 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 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. Name: (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate

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

Versatile Chemical Recycling Strategies: Value-Added Chemicals from Polyester and Polycarbonate Waste was written by Payne, Jack M.;Kamran, Muhammad;Davidson, Matthew G.;Jones, Matthew D.. And the article was included in ChemSusChem in 2022.HPLC of Formula: 106-79-6 This article mentions the following:

Zn^II-complexes bearing half-salan ligands were exploited in the mild and selective chem. upcycling of various com. polyesters and polycarbonates. Remarkably, we report the first example of discrete metal-mediated poly(bisphenol A carbonate) (BPA-PC) methanolysis being appreciably active at room temperature Indeed, Zn(2)₂ and Zn(2)Et achieved complete BPA-PC consumption within 12-18 mins in 2-Me-THF, noting high bisphenol A (BPA) yields (S_BPA=85-91%) within 2-4 h. Further kinetic anal. found such catalysts to possess k_app values of 0.28±0.040 and 0.47±0.049 min^-1 resp. at 4 wt%, the highest reported to date. A completely circular upcycling approach to plastic waste was demonstrated through the production of several renewable poly(ester-amide)s (PEAs), based on a terephthalamide monomer derived from bottle-grade poly(ethylene terephthalate) (PET), which exhibited excellent thermal properties. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6HPLC of Formula: 106-79-6).

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

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

Synthesis and structure of 3,7-dioxa-1-phosphabicyclo[3.3.1]nonanes was written by Oehme, H.;Leissring, E.;Meyer, H.. And the article was included in Zeitschrift fuer Anorganische und Allgemeine Chemie in 1980.Computed Properties of C11H20O4 This article mentions the following:

2,2-Bis(hydroxymethyl)-1-isopropylethylphosphine and 2,2-bis(hydroxymethyl)-1,1-dimethylethylphosphine, prepared by LiAlH₄ reduction of the appropriate 1-phosphonoalkylmalonate, react with BzH and anisaldehyde according to an acid catalyzed O,P-cycloacetalization to give dioxaphosphabicyclononane I (R¹ = H, R² = Me₂CH, R = Ph; R¹ = R² = Me, R = Ph, p-anisyl). Aliphatic aldehydes under the same conditions do not form the bicyclic system but give dioxanes II (R = Me, Et, Et₃C). The mechanism of the cyclocondensation reaction is discussed based on an alkoxycarbenium ion transition state. Although the relative configuration of the C-2,8-atoms could not really be proved, in particular the PH coupling constants indicate the C-2,8-protons to occupy the exo-positions. In the experiment, the researchers used many compounds, for example, Diethyl isobutylmalonate (cas: 10203-58-4Computed Properties of C11H20O4).

Diethyl isobutylmalonate (cas: 10203-58-4) 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.Computed Properties of C11H20O4

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