Month: September 2022

Ester is a chemical compound derived from an oxoacid (organic or inorganic) in which at least one –OH hydroxyl group is replaced by an –O– alkyl (alkoxy) group, 611-13-2, formula is C6H6O3, Name is Methyl furan-2-carboxylate. as in the substitution reaction of a carboxylic acid and an alcohol. Electric Literature of 611-13-2.

Cioc, Razvan C.;Smak, Tom J.;Crockatt, Marc;van der Waal, Jan C.;Bruijnincx, Pieter C. A. research published 《 Furoic acid and derivatives as atypical dienes in Diels-Alder reactions》, the research content is summarized as follows. The furan Diels-Alder (DA) cycloaddition reaction has become an important tool in green chem., being central to the sustainable synthesis of many chem. building blocks. The restriction to electron-rich furans is a significant limitation of the scope of suitable dienes, in particular hampering the use of the furans most readily obtained from biomass, furfurals and their oxidized variants, furoic acids. Herein, it is shown that despite their electron-withdrawing substituents, 2-furoic acids and derivatives (esters, amides) are in fact reactive dienes in Diels-Alder couplings with maleimide dienophiles. The reactions benefit from a substantial rate-enhancement when water is used as solvent, and from activation of the 2-furoic acids by conversion to the corresponding carboxylate salts. This approach enables Diels-Alder reactions to be performed under very mild conditions, even with highly unreactive dienes such as 2,5-furandicarboxylic acid. The obtained DA adducts of furoic acids are shown to be versatile synthons in the conversion to various saturated and aromatic carbocyclic products.

611-13-2, Methyl 2-furoate has been identified as one of the volatile flavor compounds in tequila, okra, berrycactus and black currant juice.
Methyl 2-furoate, also known as fema 2703 or methyl pyromucate, belongs to the class of organic compounds known as furoic acid esters. These are ester derivatives of furoic acid. Methyl 2-furoate is soluble (in water) and an extremely weak basic (essentially neutral) compound (based on its pKa). Within the cell, methyl 2-furoate is primarily located in the cytoplasm. Methyl 2-furoate is a sweet, fruity, and fungal tasting compound that can be found in a number of food items such as cocoa and cocoa products, potato, tamarind, and fruits. This makes methyl 2-furoate a potential biomarker for the consumption of these food products.
Methyl 2-furoate is a reactive compound that belongs to the family of sesquiterpene lactones. It has been shown to have phosphotungstic acid and hydrochloric acid reactivity, as well as nitrous and water vapor sensitivity. Methyl 2-furoate also reacts with radiation, which can be used for structural analysis. The compound is an intermediate in the synthesis of pluronic p123, which is used in fabricating biomedical devices. Methyl 2-furoate has been shown to have anti-inflammatory properties through its inhibitory effect on prostaglandin synthesis., Electric Literature of 611-13-2

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

Polyesters are important plastics, with monomers linked by ester moieties. Phosphoesters form the backbone of DNA molecules. 99769-19-4, formula is C8H9BO4, Name is 3-(Methoxycarbonyl)phenylboronic acid.Nitrate esters, such as nitroglycerin, are known for their explosive properties. Name: 3-(Methoxycarbonyl)phenylboronic acid.

Choy, Pui Ying;Yuen, On Ying;Leung, Man Pan;Chow, Wing Kin;Kwong, Fuk Yee research published 《 A Highly Efficient Monophosphine Ligand for Parts per Million Levels Pd-Catalyzed Suzuki-Miyaura Coupling of (Hetero)Aryl Chlorides》, the research content is summarized as follows. A new indolylphosphine WK-phos was synthesized for Pd-catalyzed Suzuki-Miyaura coupling of (hetero)aryl chlorides with (alkyl)arylboronic acids. Comprising this newly developed ligand with palladium(II) acetate, the resulting catalyst system is highly effective in facilitating the reaction even when the catalyst loading reaches ppm levels (e.g. 10 ppm). These examples represent one of the lowest catalyst loadings reported to date of employing monophosphine (e.g. Ar-PCy₂) for Suzuki-Miyaura reactions. The ligand geometry also was well-characterized by single-crystal x-ray crystallog.

99769-19-4, 3-Methoxycarbonylphenylboronic acid is a useful research compound. Its molecular formula is C8H9BO4 and its molecular weight is 179.97 g/mol. The purity is usually 95%.

3-Methoxycarbonylphenylboronic acid is a reactanct that has been involved in a variety of applications. For instance, it has been used in Suzuki-Miyaura cross-coupling, Iterative cross-coupling of boronate building blocks, cross-coupling with aryl/ alkenyl sulfonates, synthesis of symmetrical biaryls via CuCl catalyzed homocoupling, trifluoromethylation, and cyanation just to name a few of its many uses.

3-Methoxycarbonylphenylboronic acid is a boronate ligand that has been shown to have an interaction with the nitrogen atoms in amines. This compound is used for the Suzuki coupling reaction, which is a chemical reaction between an organoboron compound and an organic electrophile. 3-Methoxycarbonylphenylboronic acid has a helical structure that can be seen by FTIR spectroscopy and it has potent inhibitory activity., Name: 3-(Methoxycarbonyl)phenylboronic acid

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

Polyesters are important plastics, with monomers linked by ester moieties. Phosphoesters form the backbone of DNA molecules. 87-13-8, formula is C10H16O5, Name is Diethyl 2-(ethoxymethylene)malonate.Nitrate esters, such as nitroglycerin, are known for their explosive properties. HPLC of Formula: 87-13-8.

Chowdhury, Raghunath;Dubey, Akhil K.;Ghosh, Sunil K. research published 《 Organocatalyzed Diastereo- and Enantioselective Conjugate Addition of Nitroalkanes to β-Silylmethylene Malonates: Direct Access to Enantioenriched Organosilanes》, the research content is summarized as follows. Cinchona-alkaloid derived bifunctional thiourea catalyzed conjugate addition reaction of nitroalkanes to β-silylmethylene malonates is reported for direct access of densely functionalized enantioenriched organosilanes in good yields (up to 86%) with excellent stereoselectivities (up to 98:2 dr and 90% ee). Using pseudoenantiomeric catalyst, both the enantiomers of the conjugate addition products were easily accessible. Preparative scale synthesis of two conjugate addition products confirmed the practical applicability of the current methods. Also, the synthetic potential of these organosilanes was demonstrated by employing one of the products in the formal asym. synthesis of the nootropic drug (R)-oxiracetam, the synthesis of sila-analog of PAR-2 agonist AC-264613, and the synthesis of (R)-N-benzyl-4-hydroxy-pyrrolidin-2-one, intermediate for the synthesis of several pharmaceuticals.

HPLC of Formula: 87-13-8, Diethyl ethoxymethylenemalonate is a useful research compound. Its molecular formula is C10H16O5 and its molecular weight is 216.23 g/mol. The purity is usually 95%.

Diethyl ethoxymethylidenemalonate is a matrix effect reagent used in analytical chemistry. It is often used as a substrate for the cycloaddition process, which produces malondialdehyde and hydrochloric acid. The UV-absorption of the malondialdehyde can be measured to determine the concentration of the sample. Diethyl ethoxymethylidenemalonate is also used as a dna template in binding constants, where it binds with amines to form complexes that are then analyzed by light emission. It has been shown to have an inhibitory effect on gyrase and trifluoroacetic acid, both enzymes involved in DNA replication., 87-13-8.

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

Ester is a chemical compound derived from an oxoacid (organic or inorganic) in which at least one –OH hydroxyl group is replaced by an –O– alkyl (alkoxy) group, 2495-37-6, formula is C11H12O2, Name is Benzyl methacrylate. as in the substitution reaction of a carboxylic acid and an alcohol. HPLC of Formula: 2495-37-6.

Cheng, Yuan-Yuan;Yu, Ji-Xin;Lei, Tao;Hou, Hong-Yu;Chen, Bin;Tung, Chen-Ho;Wu, Li-Zhu research published 《 Direct 1,2-Dicarbonylation of Alkenes towards 1,4-Diketones via Photocatalysis》, the research content is summarized as follows. Herein, the first example of 1,2-dicarbonylation of alkenes by photocatalysis was represented. Key to success was that N(n-Bu)₄⁺ not only associates with the alkyl anion to avoid protonation, but also activated the α-keto acid to underwent electrophilic addition The α-keto acid was employed both for acyl generation and electrophilic addition By tuning the reductive and electrophilic ability of the acyl precursor, unsym. 1,4-dicarbonylation was achieved for the first time. This metal-free, redox-neutral and regioselective 1,2-dicarbonylation of alkenes was executed by a photocatalyst for versatile substrates under extremely mild conditions and shows great potential in biomol. and drug mol. derivatization.

2495-37-6, Benzyl methacrylate, also known as Benzyl methacrylate, is a useful research compound. Its molecular formula is C11H12O2 and its molecular weight is 176.21 g/mol. The purity is usually 95%.
Benzyl methacrylate is a chemical compound that belongs to the group of benzyl compounds. It has a copolymer structure with methyl ethyl methacrylate (MEMA) and hydroxyl groups. Benzyl methacrylate is produced by polymerization of benzyl chloride with allyl carbonate in the presence of radiation, forming a polymeric matrix. The morphology of this copolymer depends on the length of the benzyl chains and the concentration of MEMA., HPLC of Formula: 2495-37-6

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

Glycerides are fatty acid esters of glycerol; they are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils. 611-13-2, formula is C6H6O3, Name is Methyl furan-2-carboxylate. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Related Products of 611-13-2.

Cheng, Xiaoxue;Jiang, Ding;Cao, Bin;Wang, Shuang;Li, Hongping;Barati, Bahram;Xia, Zhen;Zhou, Jinsong;Wang, Shurong research published 《 Study on ZSM-5 catalytic pyrolysis mechanism of cellulose based on the Py-GC/MS and the density functional theory》, the research content is summarized as follows. In this study, Py-GC/MS and d. functional theory (DFT) were used to analyze products and reaction mechanisms of cellulose undergone non-catalytic and catalytic pyrolysis by ZSM-5. The results showed that the main products of non-catalytic pyrolysis are furans, furfurals, aldehydes, ketones, carboxylic acids, esters and carbohydrate. While, in catalytic pyrolysis, the furan content decreased noticeably, and a new class of components (aromatic hydrocarbons) appeared. DFT studies exhibited that a hydrogen proton at acid sites of the catalyst was directly involved in most of the pyrolysis reactions of cellulose. Catalytic pyrolysis reduces the activation energy of dehydration and de-carbonylation by 40-70 kcal/mol and 86.05 kcal/mol, resp., compared with non-catalytic pyrolysis.

611-13-2, Methyl 2-furoate has been identified as one of the volatile flavor compounds in tequila, okra, berrycactus and black currant juice.
Methyl 2-furoate, also known as fema 2703 or methyl pyromucate, belongs to the class of organic compounds known as furoic acid esters. These are ester derivatives of furoic acid. Methyl 2-furoate is soluble (in water) and an extremely weak basic (essentially neutral) compound (based on its pKa). Within the cell, methyl 2-furoate is primarily located in the cytoplasm. Methyl 2-furoate is a sweet, fruity, and fungal tasting compound that can be found in a number of food items such as cocoa and cocoa products, potato, tamarind, and fruits. This makes methyl 2-furoate a potential biomarker for the consumption of these food products.
Methyl 2-furoate is a reactive compound that belongs to the family of sesquiterpene lactones. It has been shown to have phosphotungstic acid and hydrochloric acid reactivity, as well as nitrous and water vapor sensitivity. Methyl 2-furoate also reacts with radiation, which can be used for structural analysis. The compound is an intermediate in the synthesis of pluronic p123, which is used in fabricating biomedical devices. Methyl 2-furoate has been shown to have anti-inflammatory properties through its inhibitory effect on prostaglandin synthesis., Related Products of 611-13-2

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

Ester is a chemical compound derived from an oxoacid (organic or inorganic) in which at least one –OH hydroxyl group is replaced by an –O– alkyl (alkoxy) group, 870-50-8, formula is C10H18N2O4, Name is Di-tert-butyl diazene-1,2-dicarboxylate. as in the substitution reaction of a carboxylic acid and an alcohol. Application In Synthesis of 870-50-8.

Cheng, Peter T. W.;Kaltenbach, Robert F.;Zhang, Hao;Shi, Jun;Tao, Shiwei;Li, Jun;Kennedy, Lawrence J.;Walker, Steven J.;Shi, Yan;Wang, Ying;Dhanusu, Suresh;Reddigunta, Ramesh;Kumaravel, Selvakumar;Jusuf, Sutjano;Smith, Daniel;Krishnananthan, Subramaniam;Li, Jianqing;Wang, Tao;Heiry, Rebekah;Sum, Chi Shing;Kalinowski, Stephen S.;Hung, Chen-Pin;Chu, Ching-Hsuen;Azzara, Anthony V.;Ziegler, Milinda;Burns, Lisa;Zinker, Bradley A.;Boehm, Stephanie;Taylor, Joseph;Sapuppo, Julia;Mosure, Kathy;Everlof, Gerry;Guarino, Victor;Zhang, Lisa;Yang, Yanou;Ruan, Qian;Xu, Carrie;Apedo, Atsu;Traeger, Sarah C.;Cvijic, Mary Ellen;Lentz, Kimberley A.;Tirucherai, Giridhar;Sivaraman, Lakshmi;Robl, Jeffrey;Ellsworth, Bruce A.;Rosen, Glenn;Gordon, David A.;Soars, Matthew G.;Gill, Michael;Murphy, Brian J. research published 《 Discovery of an Oxycyclohexyl Acid Lysophosphatidic Acid Receptor 1 (LPA₁) Antagonist BMS-986278 for the Treatment of Pulmonary Fibrotic Diseases》, the research content is summarized as follows. The oxycyclohexyl acid BMS-986278 (33) is a potent lysophosphatidic acid receptor 1 (LPA₁) antagonist, with a human LPA₁K_b of 6.9 nM. The structure-activity relationship (SAR) studies starting from the LPA₁ antagonist clin. compound BMS-986020 (1), which culminated in the discovery of 33, are discussed. The detailed in vitro and in vivo preclin. pharmacol. profiles of 33, as well as its pharmacokinetics/metabolism profile, are described. On the basis of its in vivo efficacy in rodent chronic lung fibrosis models and excellent overall ADME (absorption, distribution, metabolism, excretion) properties in multiple preclin. species, 33 was advanced into clin. trials, including an ongoing Phase 2 clin. trial in patients with lung fibrosis (NCT04308681).

870-50-8, Di-tert-butyl azodicarboxylate, also known as Di-tert-butyl azodicarboxylate, is a useful research compound. Its molecular formula is C₁₀H₁₈N₂O₄ and its molecular weight is 230.26 g/mol. The purity is usually 95%.
Di-tert-butyl azodicarboxylate is a reagent used in the electrophilic amination of β-keto esters catalyzed by an axially chiral guanidine. Building block in an enantioselective synthesis of 3,6-dihyropyridazines employing organocatalysts such a L-proline or (S)-2-pyrrolidinyl tetrazole. Utilized in the asymmetric Friedel-Crafts amination via a chiral organocatalyst.
Di-tert-butyl azodicarboxylate is a reagent used in the preparation of acyl hydrazinedicarboxylates via photoorganocatalytic hydroacylation of dialkyl azodicarboxylates with aldehydes in presence of phenylglyoxylic acid as photocatalyst., Application In Synthesis of 870-50-8

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

Polyesters are important plastics, with monomers linked by ester moieties. Phosphoesters form the backbone of DNA molecules. 870-50-8, formula is C10H18N2O4, Name is Di-tert-butyl diazene-1,2-dicarboxylate.Nitrate esters, such as nitroglycerin, are known for their explosive properties. Quality Control of 870-50-8.

Cheng, Cheng;Li, Ying-Xian;Jia, Xue-Min;Zhang, Ji-Quan;Zhao, Yong-Long;Feng, Wei;Tang, Lei;Yang, Yuan-Yong research published 《 Enantioselective amination of 4-alkylisoquinoline-1,3(2H,4H)-dione derivatives》, the research content is summarized as follows. A mild and efficient enantioselective amination of 4-alkylisoquinoline-1,3(2H,4H)-dione derivatives was established, which was compatible with a broad range of substrates and delivered the final products in excellent yields (up to 99%) and ee values (up to 99%) with low catalyst loading (down to 1 mol%). The synthetic potential of this methodol. was also demonstrated in the gram scale level.

Quality Control of 870-50-8, Di-tert-butyl azodicarboxylate, also known as Di-tert-butyl azodicarboxylate, is a useful research compound. Its molecular formula is C₁₀H₁₈N₂O₄ and its molecular weight is 230.26 g/mol. The purity is usually 95%.
Di-tert-butyl azodicarboxylate is a reagent used in the electrophilic amination of β-keto esters catalyzed by an axially chiral guanidine. Building block in an enantioselective synthesis of 3,6-dihyropyridazines employing organocatalysts such a L-proline or (S)-2-pyrrolidinyl tetrazole. Utilized in the asymmetric Friedel-Crafts amination via a chiral organocatalyst.
Di-tert-butyl azodicarboxylate is a reagent used in the preparation of acyl hydrazinedicarboxylates via photoorganocatalytic hydroacylation of dialkyl azodicarboxylates with aldehydes in presence of phenylglyoxylic acid as photocatalyst., 870-50-8.

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

Polyesters are important plastics, with monomers linked by ester moieties. Phosphoesters form the backbone of DNA molecules. 99769-19-4, formula is C8H9BO4, Name is 3-(Methoxycarbonyl)phenylboronic acid.Nitrate esters, such as nitroglycerin, are known for their explosive properties. Electric Literature of 99769-19-4.

Chen, Xiao-Yue;Nie, Xiao-Xue;Wu, Yichen;Wang, Peng research published 《 para-Selective arylation and alkenylation of monosubstituted arenes using thianthrene S-oxide as a transient mediator》, the research content is summarized as follows. Using thianthrene S-oxide (TTSO) as a transient mediator, para-arylation and alkenylation of mono-substituted arenes was demonstrated to get biaryls via a para-selective thianthrenation/Pd-catalyzed thio-Suzuki-Miyaura coupling sequence under mild conditions. This reaction featured a broad substrate scope, and functional group and heterocycle tolerance. The versatility of this approach was further demonstrated by late-stage functionalization of complex bioactive scaffolds, and direct synthesis of some pharmaceuticals, including Tetriprofen, Ibuprofen, Bifonazole, and LJ570.

Electric Literature of 99769-19-4, 3-Methoxycarbonylphenylboronic acid is a useful research compound. Its molecular formula is C8H9BO4 and its molecular weight is 179.97 g/mol. The purity is usually 95%.

3-Methoxycarbonylphenylboronic acid is a reactanct that has been involved in a variety of applications. For instance, it has been used in Suzuki-Miyaura cross-coupling, Iterative cross-coupling of boronate building blocks, cross-coupling with aryl/ alkenyl sulfonates, synthesis of symmetrical biaryls via CuCl catalyzed homocoupling, trifluoromethylation, and cyanation just to name a few of its many uses.

3-Methoxycarbonylphenylboronic acid is a boronate ligand that has been shown to have an interaction with the nitrogen atoms in amines. This compound is used for the Suzuki coupling reaction, which is a chemical reaction between an organoboron compound and an organic electrophile. 3-Methoxycarbonylphenylboronic acid has a helical structure that can be seen by FTIR spectroscopy and it has potent inhibitory activity., 99769-19-4.

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

Glycerides are fatty acid esters of glycerol; they are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils. 2495-37-6, formula is C11H12O2, Name is Benzyl methacrylate. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Name: Benzyl methacrylate.

Chen, Xiaomei;Guo, Zhian;Wei, Liulin;Liu, Qian;Zhao, Jingchan research published 《 Use of a temperature-responsive polymer micelle in microextraction method combined with gas chromatography-mass spectrometry for the determination of seven polycyclic aromatic hydrocarbons》, the research content is summarized as follows. In this study, a novel microextraction method based on temperature-responsive polymer micelle has been designed combined with gas chromatog.-mass spectrometry for the determination of seven polycyclic aromatic hydrocarbons (PAHs) in tea infusions. The method is based on the formation of micelles by poly (N-isopropylacrylamide)-block-poly (benzyl methacrylate) (PNIPAM-b-PBnMA) in aqueous samples at low temperatures and encapsulation of the targets due to the π-π and hydrophobic interaction between PBnMA with PAHs compounds, followed by the formation and insolubilization of agglomerates containing the preconcd. analytes by increasing the temperature Under the optimal conditions, good linearity was observed in the range of 0.1-100μg L^-1 with the coefficient of determination being above 0.9959. The limits of detection and limits of quantitation were in the range of 0.021-0.042μg L^-1 and 0.064-0.128μg L^-1, resp. The intra-day and inter-day precision were 3.4-9.1% and 5.9-13.7%, resp. The established method was applied successfully to analyze two tea infusions.

2495-37-6, Benzyl methacrylate, also known as Benzyl methacrylate, is a useful research compound. Its molecular formula is C11H12O2 and its molecular weight is 176.21 g/mol. The purity is usually 95%.
Benzyl methacrylate is a chemical compound that belongs to the group of benzyl compounds. It has a copolymer structure with methyl ethyl methacrylate (MEMA) and hydroxyl groups. Benzyl methacrylate is produced by polymerization of benzyl chloride with allyl carbonate in the presence of radiation, forming a polymeric matrix. The morphology of this copolymer depends on the length of the benzyl chains and the concentration of MEMA., Name: Benzyl methacrylate

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

Glycerides are fatty acid esters of glycerol; they are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils. 99769-19-4, formula is C8H9BO4, Name is 3-(Methoxycarbonyl)phenylboronic acid. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Name: 3-(Methoxycarbonyl)phenylboronic acid.

Chen, Xiao-Bing;Li, Li;Yang, Wan-Chun;Song, Kun-Long;Wu, Bin;Gan, Wan-Er;Cao, Jian;Xu, Li-Wen research published 《 Palladium-Catalyzed C-C Bond Activation/Suzuki Reaction of Methylenecyclobutanes》, the research content is summarized as follows. A novel palladium-catalyzed C-C bond activation manner of methylenecyclobutanes followed by subsequent Suzuki cross-coupling reaction afforded multisubstituted indanes. The tandem reaction process involved intramol. carbopalladation of double bond, β-carbon elimination and intermol. trapping of the transient σ-alkylpalladium complex with boronic acids. A new TADDOL-derived phosphoramidite ligand bearing fluorine and silicon-based bulky groups was found to be efficient for C-C bond activation of methylenecyclobutanes.

99769-19-4, 3-Methoxycarbonylphenylboronic acid is a useful research compound. Its molecular formula is C8H9BO4 and its molecular weight is 179.97 g/mol. The purity is usually 95%.

3-Methoxycarbonylphenylboronic acid is a reactanct that has been involved in a variety of applications. For instance, it has been used in Suzuki-Miyaura cross-coupling, Iterative cross-coupling of boronate building blocks, cross-coupling with aryl/ alkenyl sulfonates, synthesis of symmetrical biaryls via CuCl catalyzed homocoupling, trifluoromethylation, and cyanation just to name a few of its many uses.

3-Methoxycarbonylphenylboronic acid is a boronate ligand that has been shown to have an interaction with the nitrogen atoms in amines. This compound is used for the Suzuki coupling reaction, which is a chemical reaction between an organoboron compound and an organic electrophile. 3-Methoxycarbonylphenylboronic acid has a helical structure that can be seen by FTIR spectroscopy and it has potent inhibitory activity., Name: 3-(Methoxycarbonyl)phenylboronic acid

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