Month: February 2023

Effects of nano-barium sulfate on the properties of polybutylene terephthalate/polyethylene terephthalate composites was written by Li, Beibei;Liu, Ling;Wang, Xuanlun;Ma, Yong;Pan, Duo;Maganti, Srihari;Xu, Benbin;Guo, Zhanhu. And the article was included in ES Materials & Manufacturing in 2022.COA of Formula: C73H108O12 This article mentions the following:

In this study, the nano barium sulfate (Nano-BaSO₄) as an inorganic filler, polybutylene terephthalate (PBT)/polyethylene terephthalate (PET)/Nano-BaSO₄ composites were prepared by melt blending. The effect of Nano-BaSO₄ on the properties of PBT/PET blends was studied by thermal deflection temperature tester, differential scanning calorimeter, thermogravimetric analyzer, rotational rheometer, electronic universal tensile testing machine, pendulum impact testing machine and other instruments. The results showed that when PBT:PET was set as 90:10 wt% and Nano-BaSO₄ content was 4 wt%, the heat deflection temperature of the composites was the highest, which was 22.6% higher than that of the PBT/PET blends, and the heat resistance was the best. When the content of Nano-BaSO₄ was 2 wt%, the comprehensive mech. properties of the material were the best. 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: 6683-19-8COA of Formula: 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. 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.COA of Formula: C73H108O12

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

Photocurable selenophene/maleimide-based high-refractive-index copolymers obtained via radical copolymerization was written by Tokushita, Yoshihisa;Watanabe, Airi;Torii, Ayaka;Nakabayashi, Kazuhiro;Samitsu, Sadaki;Mori, Hideharu. And the article was included in Reactive & Functional Polymers in 2021.Electric Literature of C14H12S2 This article mentions the following:

Selenophene-containing copolymers with either alternating or random sequences and high refractive indexes were synthesized via conventional free-radical copolymerization of 2-vinylselenophene (2VS). Copolymers with a moderate alternating tendency were obtained via radical copolymerization of electron-donating 2VS and electron-accepting maleimide derivatives, such as N-Me maleimide (MMI), N-Ph maleimide (PMI), and N-vinyl maleimide (VMI). Copolymerization of 2VS with glycidyl methacrylate (GMA) also afforded copolymers containing selenophene and reactive epoxy units in the side chains. The selenophene-containing poly(2VS) showed a high refractive index (1.6420 @ 589 nm) and a reasonable Abbe number (30.7). High refractive indexes of 1.6138-1.5959 with corresponding Abbe numbers of ~30 were similarly achieved for the selenophene/maleimide copolymers. The introduction of the maleimide moiety into the polymer side chain improved its thermal stability and enhanced the glass transition temperature Selenophene-containing copolymers with pendant N-vinyl units were obtained via copolymerization of 2VS and VMI, which was successfully employed as a precursor for obtaining a photoinduced crosslinked film via a thiol-ene reaction with 1,6-hexanedithiol in the presence of a photo-radical initiator under UV irradiation Thus, for the first time, photocurable and high-refractive-index selenophene-based copolymers were developed through the combination of a selenophene-containing vinyl monomer and a maleimide derivative with a pendant N-vinyl group. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Electric Literature of C14H12S2).

Benzyl benzodithioate (cas: 27249-90-7) 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. 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.Electric Literature of C14H12S2

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

Evaluation and comparison of the microbial consortia enriched by gamma-caprolactone and N-Acyl homoserine lactones for effective quorum sensing disruption was written by Xu, Boyan;Ng, Tze Chiang Albert;Huang, Shujuan;Varjani, Sunita;Ng, How Yong. And the article was included in International Biodeterioration & Biodegradation in 2021.Recommanded Product: 5-Ethyldihydrofuran-2(3H)-one This article mentions the following:

This study proposed and compared 3 novel quorum quenching consortia (QQC) composed of abundant quorum quenching (QQ) candidates including bacteria and fungi for effective quorum sensing disruption, which were isolated by mixtures of N-Acyl homoserine lactones (AHLs) and gamma-caprolactone (GCL). AHLs removal anal. indicated that different QQC could efficiently remove specific AHLs. When utilizing AHLs, the growth rates of QQC isolated by the mixtures of AHLs were significantly higher than those utilizing acetate. It congruously suggested that these QQC had higher substrate specificities towards AHLs, indicating their sustainable QQ performance, as compared to that of the QQC enriched by GCL. There was a clear shift in the microbial community diversity and composition among QQC, which were implicated by the structure differences among GCL and AHLs as substrates in the enrichment culture. The different community assemblages within QQC were the main determinants accounting for the diverse QQ performance. Collectively, these findings offered inspiring implications for sustainable QQ bioaugmentation and biostimulation applications in membrane bioreactors (MBRs). 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. 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.Recommanded Product: 5-Ethyldihydrofuran-2(3H)-one

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

Discrimination of French wine brandy origin by PTR-MS headspace analysis using ethanol ionization and sensory assessment was written by Malfondet, Nicolas;Brunerie, Pascal;Le Quere, Jean-Luc. And the article was included in Analytical and Bioanalytical Chemistry in 2021.Electric Literature of C6H10O2 This article mentions the following:

The headspace volatile organic compound (VOC) fingerprints (volatilome) of French wine brandies were investigated by proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS). Protonated ethanol chem. ionization was used with dedicated exptl. conditions that were previously validated for model wines. These included a reference vial containing a hydro-alc. solution with the same ethanol content (20% volume/volume) as the diluted sample spirits, which was used to establish steady-state ionization conditions. A low elec. field strength to number d. ratio E/N (85 Td) was used in the drift tube in order to limit the fragmentation of the protonated analytes. The obtained headspace fingerprints were used to investigate the origin of French brandies produced within a limited geog. production area. Brandies of two different vintages (one freshly distilled and one aged for 14 years in French oak barrels) were successfully classified according to their growth areas using unsupervised (principal component anal., PCA) and supervised (partial least squares regression discriminant anal., PLS-DA) multivariate analyses. The models obtained by PLS-DA allowed the identification of discriminant volatile compounds that were mainly characterised as key aroma compounds of wine brandies. The discrimination was supported by sensory evaluation conducted with free sorting tasks. The results showed that this ethanol ionization method was suitable for direct headspace anal. of brandies. They also demonstrated its ability to distinguish French brandies according to their growth areas, and this effect on brandy VOC composition was confirmed at a perceptive level. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Electric Literature of C6H10O2).

5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) 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. 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.Electric Literature of C6H10O2

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

Non-targeted analysis using gas chromatography-mass spectrometry for evaluation of chemical composition of E-vapor products was written by Shah, Niti H.;Noe, Michael R.;Agnew-Heard, Kimberly A.;Pithawalla, Yezdi B.;Gardner, William P.;Chakraborty, Saibal;McCutcheon, Nicholas;Grisevich, Hannah;Hurst, Thomas J.;Morton, Michael J.;Melvin, Matt S.;Miller, John H. IV.. And the article was included in Frontiers in Chemistry (Lausanne, Switzerland) in 2021.Synthetic Route of C6H10O2 This article mentions the following:

The Premarket Tobacco Product Applications (PMTA) guidance issued by the Food and Drug Administration for electronic nicotine delivery systems (ENDSs) recommends that in addition to reporting harmful and potentially harmful constituents (HPHCs), manufacturers should evaluate these products for other chems. that could form during use and over time. Although e-vapor product aerosols are considerably less complex than mainstream smoke from cigarettes and heated tobacco product (HTP) aerosols, there are challenges with performing a comprehensive chem. characterization. Some of these challenges include the complexity of the e-liquid chem. compositions, the variety of flavors used, and the aerosol collection efficiency of volatile and semi-volatile compounds generated from aerosols. In this study, a non-targeted anal. method was developed using gas chromatog.-mass spectrometry (GC-MS) that allows evaluation of volatile and semi-volatile compounds in e-liquids and aerosols of e-vapor products. The method employed an automated data anal. workflow using Agilent MassHunter Unknowns Anal. software for mass spectral deconvolution, peak detection, and library searching and reporting. The automated process ensured data integrity and consistency of compound identification with >99% of known compounds being identified using an inhouse custom mass spectral library. The custom library was created to aid in compound identifications and includes over 1,100 unique mass spectral entries, of which 600 have been confirmed from reference standard comparisons. The method validation included accuracy, precision, repeatability, limit of detection (LOD), and selectivity. The validation also demonstrated that this semi-quant. method provides estimated concentrations with an accuracy ranging between 0.5- and 2.0-fold as compared to the actual values. The LOD threshold of 0.7 ppm was established based on instrument sensitivity and accuracy of the compounds identified. To demonstrate the application of this method, we share results from the comprehensive chem. profile of e-liquids and aerosols collected from a marketed e-vapor product. Applying the data processing workflow developed here, 46 compounds were detected in the e-liquid formulation and 55 compounds in the aerosol sample. More than 50% of compounds reported have been confirmed with reference standards The profiling approach described in this publication is applicable to evaluating volatile and semi-volatile compounds in e-vapor products. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Synthetic Route of C6H10O2).

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.Synthetic Route of C6H10O2

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

Key aroma compounds and metabolic profiling of Debaryomyces hansenii L1-1-fermented Flos Sophorae was written by Zhang, Qianying;Ma, Zhongbao;Meng, Qi;Li, Dongliang;Ding, Zhongyang. And the article was included in Journal of Food Biochemistry in 2021.Product Details of 695-06-7 This article mentions the following:

The extract from Debaryomyces hansenii L1-1-fermented Flos Sophorae has a unique aroma and could be used as a natural spice. The influence of yeast growth and culture medium pH on organoleptic properties of fermented substrates, as well as on the content of volatile aromatic compounds, total sugars, polysaccharides, reducing sugars, total proteins, and amino acids, were analyzed. Metabolic pathways were annotated to compare and contrast key aromatic compounds and metabolic profiles of water and ethanol extracts of D. hansenii L1-1-fermented Flos Sophorae. We found that cells grew most rapidly, pH values changed significantly, and the largest consumption of sugars and amino acids occurred within 48 h, producing bouquet-like, fruity, and sweet odors, as well as the highest content of volatile aromatic compounds in the extracts The main aroma metabolites were 2-phenylethanol, linalool, and α-terpineol. The sensory quality of the ethanol extracts was superior to that of the water extracts Five aromatic compounds, isoamyl alc., 2-methylbutan-1-ol, isobutyric acid, 2,3-hexanedione, and 1-hexanol, were pos. correlated with the water extract group and neg. correlated with the ethanol extract group, whereas 13 aromatic compounds, styrene, acetophenone, 2-octen-1-ol, linalool, naphthalene, α-terpineol, dihydrocarveol, (-)-myrtenol, Me anthranilate, eugenol, γ-nonanolactone, jasmone, and β-ionone, showed the converse trend. Although 2-phenylethanol displayed the highest concentration in the extracts, it did not significantly contribute to the separation of ethanol and water extracts In Flos Sophorae medium, D. hansenii mainly produces 2-phenylethanol from phenylalanine by the Ehrlich reaction, whereas it produces linalool and α-terpineol by the terpenoid backbone and monoterpenoid biosynthetic pathways; the variable contents of proline, arginine, and glutamate could respond to the arginine and proline metabolic pathways. Practical applications : Flos Sophorae, a collection of buds of Sophora japonica L., is a traditional Chinese medicinal and edible plant for its good aroma, taste, and nutritional value. Debaryomyces hansenii is a common, aroma-producing yeast. D. hansenii L1-1-fermented Flos Sophorae had a unique, bouquet-like aroma, slightly softer than the typical Flos Sophorae-like aroma. This study enriches our understanding of predominant aroma components and determines their contribution to the profiles of Flos Sophorae ferments obtained using D. hansenii L1-1. Researchers and manufacturers specializing in spices making can use these data to improve the aromatic profiles of natural spices produced by microorganisms, thereby obtaining unique aromas. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Product Details of 695-06-7).

5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) 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. 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 695-06-7

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

Direct and Efficient Synthesis of Sulfonium Acyl Sulfonylmethylide Ylides from Acetylenic Sulfones and Dimethyl Sulfoxide was written by Fu, Duo;Wang, Jiayi;Xu, Jiaxi. And the article was included in Synthesis in 2021.Computed Properties of C13H15NO2 This article mentions the following:

Bifunctionalized sulfonium ylides – sulfonium acyl sulfonylmethylides I (R¹ = Ph, 2-MeOC₆H₄, 1-naphthyl, etc.; R² = Me, 4-MeC₆H₄, 4-FC₆H₄, etc.) were directly and efficiently prepared from various acetylenic sulfones and aliphatic sulfoxides under heating conditions. The current method features short reaction time, low cost, readily available starting materials, convenient operation, and purification, providing an efficient access to widely applied bifunctionalized sulfonium ylides. In the experiment, the researchers used many compounds, for example, tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3Computed Properties of C13H15NO2).

tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3) 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. 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.Computed Properties of C13H15NO2

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

Hydrolysis and Clemmensen reduction of 2-ethoxalyl-cyclopentanone was written by Mayer, R.;Buerger, H.;Matauschek, B.. And the article was included in Journal fuer Praktische Chemie (Leipzig) in 1961.Reference of 39163-39-8 This article mentions the following:

The hydrolysis of 2-ethoxalylcyclopentanone (I) yielded either nearly 100% 2-oxocyclopentylideneglycolic acid (II) or with ring cleavage 60% HO₂CCO(CH₂)₄CO₂H (III). Clemmensen reduction of II yielded about 50% 2-oxocyclopentylacetic acid (IV), reduced only under rigorous conditions to cyclopentylacetic acid (V). These results showed that highly enolized α-oxo esters were not, as previously assumed, reduced to α-hydroxy esters, but to the corresponding carboxylic acid esters; this was confirmed by the smooth conversion of 2,5-diethoxalylcyclopentanone (VI) to 2,5-bis(carboxymethyl)cyclopentanone (VII). Cyclopentanone (270 g.) condensed with 438 g. (CO₂Et)₂ and 69 g. Na in 1200 cc. EtOH yielded 245-295 g. I, b_1.3 106°, m. 31-2° (all m.ps. corrected). I (40 g.) added dropwise at 5° to 40 g. K0H in 7 cc. H₂O and 70 cc. EtOH, the mixture diluted with 500 cc. H₂O, acidified with cooling with HCl, and extracted with Et₂O gave 27.34 g. II, m. 63.5-64°, red with aqueous FeCl₃. II pyrolyzed yielded with elimination of CO and CO₂ 8% cyclopentanone. I (18.4 g.) and excess 30% aqueous-alc. KOH refluxed 3 hrs. and steam distilled gave about 4 g. 2-cyclopentylidenecyclopentanone, b₇₅₉ 252-3°, also obtained (3 g.) (b₇₅₀ 251-2°, n²⁰_D 1.5178) from 15.6 g. II. I (9.2 g.), 10 cc. concentrated HCl, and 40 cc. H₂O refluxed 1 hr., washed with Et₂O, and evaporated gave III, needles, m. 94° (C₆H₆), with FeCl₃ dark yellow-olive-green changing to violet, wine-red, and finally nearly colorless. III in 80% H₂SO₄ heated gave nearly 100% adipic acid. III in MeOH heated a few min. with 2,4-(O₂N)₂C₆H₃NHNH₂, acidified with concentrated HCl, refluxed 2 min., and cooled gave the 2,4-dinitrophenylhydrazone, yellow leaflets, m. 138° (EtOH). II (20 g.), 20 cc. concentrated HCl, and 200 cc. H₂O refluxed 1 hr. and evaporated yielded III, m. 94° (C₆H₆). I (46 g.) and 150 g. amalgamated Zn granules in 300 cc. 1:2 HCl-H₂O refluxed 5 hrs., extracted with Et₂O, the extract reeextd. with aqueous Na₂CO₃, the alk. extracted acidified with HCl, extracted with Et₂O, and the residue from the extract chromatographed on silica gel gave 6 g. IV, b₁₆ 185-90°, m. 50-2° (petr. ether); the original Et₂O phase evaporated and the residue chromatographed on silica gel gave 0.9 g. lactone IV; in an attached cold trap were condensed some C₂H₄, cyclopentene, and cyclopentane. II (15.6 g.) and 60 g. amalgamated Zn granules in 120 cc. 1:2 HCl-H₂O refluxed 3 hrs. and worked up gave 7.2 g. IV, m. 50-1° (petr. ether). IV (7 g.), 50 g. amalgamated Zn, and 400 cc. 6N HCl refluxed 10 hrs., extracted with Et₂O, the extract reextracted with aqueous Na₂CO₃, the aqueous extract acidified with HCl, and the product isolated with Et₂O gave 4.5 g. V, yellow oil, b₁₁ 120°. VI (57 g.) and 240 g. amalgamated Zn in 720 cc. 1:2 HCl-H₂O refluxed 8 hrs., filtered hot, saturated with Na₂SO₄, and extracted with Et₂O gave 20 g. VII, m. 175-6° (EtOAc). In the experiment, the researchers used many compounds, for example, Ethyl 2-oxo-2-(2-oxocyclopentyl)acetate (cas: 39163-39-8Reference of 39163-39-8).

Ethyl 2-oxo-2-(2-oxocyclopentyl)acetate (cas: 39163-39-8) 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. 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.Reference of 39163-39-8

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

Triflic acid-mediated synthesis of thioglycosides was written by Escopy, Samira;Singh, Yashapal;Demchenko, Alexei V.. And the article was included in Organic & Biomolecular Chemistry in 2019.Recommanded Product: (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate This article mentions the following:

An efficient synthesis of thioglycosides from per-acetates in the presence of triflic acid is described. The developed protocol features high reaction rates and product yields. Some reactive sugar series give high efficiency in the presence of sub-stoichiometric trifluoromethanesulfonic acid (TfOH) in contrast to other known protocols that require multiple equivalent of Lewis acids to reach high conversion rates. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4Recommanded Product: (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate).

(2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4) 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. 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.Recommanded Product: (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

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

Copper-mediated etherification of arenes with alkoxysilanes directed by an (2-aminophenyl)pyrazole group was written by Selvakumar, Jayaraman;Grandhi, Gowri Sankar;Sahoo, Harekrishna;Baidya, Mahiuddin. And the article was included in RSC Advances in 2016.Quality Control of Methyl 2-methoxy-4-methylbenzoate This article mentions the following:

An efficient copper-mediated etherification of inert C-H bonds of (hetero)arenes with reagent-amounts of alkoxysilanes and alkanols was developed using (2-aminophenyl)pyrazole (2-APP) as a removable directing group. The reaction was scalable, rapidly proceeded under an open atm., and tolerated diverse functional groups to provide alkyl aryl ethers in high yields (up to 87%). As an application, the formal synthesis of anti-emetic drug metoclopramide was accomplished. In the experiment, the researchers used many compounds, for example, Methyl 2-methoxy-4-methylbenzoate (cas: 81245-24-1Quality Control of Methyl 2-methoxy-4-methylbenzoate).

Methyl 2-methoxy-4-methylbenzoate (cas: 81245-24-1) 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. 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. Quality Control of Methyl 2-methoxy-4-methylbenzoate

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