Category: esters-buliding-blocks

The alleviation of methyl jasmonate on loss of aroma lactones correlated with ethylene biosynthesis in peaches was written by Cai, Hongfang;Han, Shuai;Yu, Mingliang;Ma, Ruijuan;Yu, Zhifang. And the article was included in Journal of Food Science in 2020.Name: 5-Ethyldihydrofuran-2(3H)-one This article mentions the following:

The occurrence of CI results in irreversible aroma loss, especially ‘peach-like’ lactones loss during cold storage and subsequent shelf life. Me jasmonate (MeJA) treatment is effective in alleviating CI symptoms in peach fruit; however, its effect on peach aroma volatiles is still unknown. To explore the effect and mechanism of MeJA treatment on aroma loss of peaches, fruit was treated with 10μmol/L MeJA, then stored at 4°C for 3 wk, and subsequently transferred to 20°C to simulate shelf life for 3 days. Here, the ability of MeJA to regulate aroma lactones of ‘Xiahui 6’ peaches was investigated, and the expression of genes responsible for ethylene and lactones biosynthesis was considered. MeJA treatment significantly reduced internal browning index, increased ethylene production, and promoted the emission of aroma-related lactones in peaches during shelf life at room temperature In addition, MeJA also elevated the expression of PpSAMS, PpACS3, PpACS4, PpACO, and PpACX3 during or after cold storage. These results suggested that MeJA treatment could enhance chilling tolerance in peaches and induce the recovery of ethylene and aroma lactones, which is closely related to ethylene biosynthesis as revealed by upregulated genes expression of PpSAMS, PpACS3/4, and PpACO. Practical Application : This research provides theor. basis for the application of Me jasmonate in fruit preservation and the basis for mol. breeding to cultivate aroma-abundant peach fruits. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Name: 5-Ethyldihydrofuran-2(3H)-one).

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

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

Competition between the β-hydroxylation of a primary and a tertiary carbon atom in rats was written by Moubarik, Soumaya Chraibi-Ben;Menager, Sabine;Lafont, Olivier. And the article was included in European Journal of Medicinal Chemistry in 2000.Name: Diethyl isobutylmalonate This article mentions the following:

In order to study the effect of steric hindrance on competition between two kinds of β-hydroxylation, a compound bearing on a pyrimidinetrione nucleus both a branched side chain with a tertiary carbon atom in position β (iso-Bu group) and a linear side chain (Et group), was selected and administered to rats. Urine and feces were collected and extracted Hydroxymetabolites and their derivatives were isolated and then identified. The β-hydroxylation of the linear chain was more important than the β-hydroxylation of the branched chain. Steric hindrance plays a decisive role in this regioselectivity. In the experiment, the researchers used many compounds, for example, Diethyl isobutylmalonate (cas: 10203-58-4Name: Diethyl isobutylmalonate).

Diethyl isobutylmalonate (cas: 10203-58-4) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. 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: Diethyl isobutylmalonate

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

Anomeric equilibria in derivatives of amino sugars. Nuclear magnetic resonance studies on acetylated amino sugars and specifically deuterated analogs was written by Horton, Derek;Hughes, Jack B.;Jewell, Jon S.;Philips, Kerstin D.;Turner, William Nelson. And the article was included in Journal of Organic Chemistry in 1967.Formula: C16H23NO10 This article mentions the following:

Acetylation of derivatives of 2-amino-2-deoxy-D-glucose and 2-amino-2-deoxy-D-mannose with Ac2O-d6 permitted definitive assignment of the signal for the N-Ac Me group in the N.M.R. spectra of the pyranose pentaacetates of the 2 amino sugars, and some related derivatives The anomeric compositions of the mixtures formed by acetylation of the amino sugars, and a number of simple sugars, with Ac2O in pyridine, were investigated. Aryl substituents in acetylated sugar derivatives are shown to cause shielding of certain Ac groups, with the result that, in CHCl3-d, the N.M.R. signals of these Ac groups are observed at unusually high field. In the experiment, the researchers used many compounds, for example, (2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate (cas: 6730-10-5Formula: C16H23NO10).

(2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate (cas: 6730-10-5) 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. 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.Formula: C16H23NO10

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

Effect of Wort Boiling on Volatiles Formation and Sensory Properties of Mead was written by Starowicz, Malgorzata;Granvogl, Michael. And the article was included in Molecules in 2022.Name: 5-Hexyldihydrofuran-2(3H)-one This article mentions the following:

Mead is an alc. beverage based on bee honey, which can be prepared in different variations such as modified honey-water compositions, the addition of spices, and the use of different yeast strains. Moreover, the technol. process of mead production such as the step of wort preparation (with or without boiling of wort before fermentation) can be modified. All these factors might have a significant impact on the formation of aroma-active compounds, and therefore, sensory acceptance by consumers. High vacuum distillation, using the so-called solvent assisted flavor evaporation (SAFE) technique, or headspace-solid phase microextraction (HS-SPME) were applied for the isolation of the odorants. A sensory profile was used to monitor the changes in the aroma of the mead samples. Twenty-eight aroma-active compounds were detected during aroma extract dilution anal. (AEDA) based on gas chromatog.-olfactometry (GC-O) and were finally identified by gas chromatog.-mass spectrometry (GC-MS) using authentic reference compounds, including Me propanoate, Me 3-(methylthio)propanoate, and methional, all of them were identified for the first time in mead. Compounds with high flavor dilution (FD) factors were quantitated via stable isotope dilution anal. (SIDA) and revealed Et acetate (16.4 mg/L) to be the most abundant volatile compound, increasing to 57 mg/L after wort boiling, followed by Et hexanoate (both 1.2 mg/L). Furthermore, key aroma compounds were esters such as Et hexanoate, Et octanoate, and Et 3-methylbutanoate. The sensory panel evaluated ethanolic, honey-like, clove-like, sweet, and fruity notes as the main aroma descriptors of mead. The significant change in sensory evaluation was noted in the sweet odor of the heat-treated mead. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Name: 5-Hexyldihydrofuran-2(3H)-one).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) 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.Name: 5-Hexyldihydrofuran-2(3H)-one

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

On-bead peptoid dimerization induced by incorporation of glycosylated bridging units in submonomer solid-phase approach to glycopeptoids was written by Comegna, Daniela;Del Gatto, Annarita;Saviano, Michele;Zaccaro, Laura. And the article was included in Organic Letters in 2019.Recommanded Product: 4163-60-4 This article mentions the following:

A study on submonomer solid-phase synthesis of S-glycopeptoids has been carried out by screening different parameters. Dimeric species, featuring glycosylated bridging amino monomers, were found under suitable conditions. These dimers arise from an on-resin crosslinking reaction occurring with the incorporation of a glycoamino submonomer into the growing chain and subsequent nucleophilic attack of the resulting secondary amine to a still unreacted bromoacetylated unit. The arising byproduct can be regarded as a novel dimeric peptoid type. 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: 4163-60-4).

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

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

The preparation and properties of a platinized charcoal catalyst with some observations on the behavior of inhibitors was written by Baltzly, Richard. And the article was included in Journal of the American Chemical Society in 1952.Computed Properties of C11H14O3 This article mentions the following:

A Pt-C catalyst (I) notable for its inactivity in debenzylation and in dehalogenations has been developed and tested on a variety of reducible compounds It appears to reduce aliphatic CO compounds less readily than aromatic. Both I and Pd-C are inhibited toward the reduction of control substrates by bases and nucleophilic ions. To 1 g. C (Darco G-60) in the reducing bottle of a Burgess-Parr hydrogenator was added 30-50 cc. H₂O and solutions of H₂PtCl₆ and PdCl₂ containing 100 mg. Pt and 0.2 mg. Pd, resp., the bottle evacuated, filled with H, shaken 15-20 min., and the H₂O finally replaced by MeOH; when not in use, the I was stored under MeOH in a reducing bottle. The hydrogenations with I were performed in MeOH at room temperature, in general with 50 millimoles substrate in 50 cc. MeOH. A series of hydrogenations was carried out in this manner; the substrate, the hydrogenation absorption, and, where determined, the hydrogenation products, of these runs are listed in the following (H absorption rates of 5-10 millimoles/min. are marked fast, 1-5 millimoles/min. moderate, < 1 millimole/min. slow; products in parentheses were not specifically isolated but were present with reasonable certainty): cyclohexene, 1 mole very fast (cyclohexane); CH₂:CHCH₂-Cl, 1 mole moderate (C₃H₈, PrCl, HCl); PhCH₂Cl, 1 mole slow (PhMe); PhCH₂OH, about 0.2 mole very slow (Ph-Me ?, substrate possibly contaminated with PhCH₂Cl); (PhCH₂)₂O, none; PhCH₂OCONHCH₂CO₂H, none; PhNMeCH₂Ph.HCl, none; p-ClC₆H₄NH₂, none; o-ClC₆H₄NH₂, none; m-BrC₆H₄Me, none; o-BrC₆H₄OMe, very slow, -; o-BrC₆H₄CO₂Et, none; p-ClC₆H₄OC₆H₄NO₂-p, 3 moles, very fast, p-ClC₆H₄OC₆H₄NH₂-p; (PhN:)₂ + 2 moles AcOH, 1 mole very fast, 1 mole moderate (PhNH₂); (PhN:)₂, 1 mole very fast, 1 mole slow [PhNH₂, (PhNH)₂]; (PhN:)₂ in 0.019N NaOH, 1 mole very fast, (PhNH)₂; 2, 6-dimethyl-4-hydroxy-5-phenylazo-4-pyrimidinol-HCl, 2 moles fast, 5-amino-2,6-dimethyl-4-pyrimidinol (+ Ph-NH₂); PhCH:NMe, fast, PhCH₂NHMe; p-MeOC₆H₄-CH:NCHPhMe + 1.5 moles AcOH, fast, p-MeOC₆H₄CH₂-NHCHPhMe; 2, 5-(MeO)₂C₆H₃COC(:NOH)Me + 3 moles HCl, 2 moles moderate, 2, 5-(MeO)₂C₆H₃COCH(NH₂)Me.-HCl; PhCN + HCl, none; PhCH₂CN + HCl, none; PhCH₂C(:NOH)Ph, none; AcH, very slow (EtOH) AcH + morpholine, 1 mole moderate (ethylmorpholine); cyclohexanone, none; Me₂CO, none; Me₂CO + cyclohexylamine, very slow, -; p-MeOC₆H₄CHO, 1 mole moderate (anisyl alc.); p-MeOC₆H₄CHO + BuNH₂, 1 mole slow, p-MeOC₆H₄CH₂NHBu; p-HOC₆H₄Ac, 1 mole slow, polymerized product; PhCH:CHCHO, 2 moles moderate (Ph(CH₂)₃OH); AcCH₂CO₂Et, none; BzCH₂CO₂-Et, 1 mole slow, PhCH(OH)CH₂CO₂Et; 3, 4-MeO(HO)-C₆H₃CH:CAcCO₂Et, 1 mole moderate, 3, 4-MeO(HO)-C₆H₃CH₂CHAcCO₂Et; 3,4-(MeO)₂C₆H₃CH: CAcCO₂Et, 1 mole moderate, 3, 4-(MeO)₂C₆H₃CH₂CHAcCO₂Et; Ph₂CO, none; PhCH₂Bz, none; benzanisoine, none; C₆H₆ in glacial AcOH, slow not carried to completion (cyclohexane ?); C₁₀H₈ in glacial AcOH, none at 25°. Both I and Pd-C were tested with control substrates in the presence of various concentrations of inhibitors and the half-inhibitory M concentrations (given for I and Pd-C) determined for: MeO^– 0.001, 0.001; PhO^– 0.006, 0.006; I^– 0.0004, 0.0004; CN^– < 0.001, -; NH₃ 0.002, 0.002; PhCH₂NMe₂ 0.001, 0.001; and p-MeC₆H₄NH₂ 0.007, 0.005-0.006. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Computed Properties of C11H14O3).

Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0) 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.Computed Properties of C11H14O3

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

Synthesis and Optoelectronic Properties of Alternating Copolymers Containing Anthracene Unit in The Main Chain by Radical Ring-Opening Polymerization was written by Mori, Hideharu;Tando, Izumi;Tanaka, Hiromi. And the article was included in Macromolecules (Washington, DC, United States) in 2010.Category: esters-buliding-blocks This article mentions the following:

Novel alternating copolymers composed of anthracene moiety and halostyrene unit were synthesized by ring-opening polymerization of cyclic monomers, 10-methylene-9,10-dihydroanthryl-9-spiro-p-chlorophenylcyclopropane and its bromo derivative Reversible addition-fragmentation chain transfer and conventional free radical polymerizations were employed for the purpose. In both cases, the ring-opening polymerization proceeded predominantly to afford alternating copolymer containing anthracene unit in the main chain. Incorporations of optoelectronic groups, involving diphenylamine, carbazole, and phenothiazine, on the halostyrene moieties of the alternating copolymers were conducted by palladium-catalyzed reactions. Novel nonconjugated copolymers having perfect alternating structures were obtained, in which the alternate arrangement of two distinct electronic functionalities is formed owing to the ring-opening polymerization system. Resulting anthracene-based alternating copolymers having two distinct electronic functionalities exhibited characteristic fluorescence resonance energy transfer, as confirmed by UV-vis and fluorescence spectra. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Category: esters-buliding-blocks).

Benzyl benzodithioate (cas: 27249-90-7) 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.Category: esters-buliding-blocks

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

RAFT Polymerization of Acrylamides Containing Proline and Hydroxyproline Moiety: Controlled Synthesis of Water-Soluble and Thermoresponsive Polymers was written by Mori, Hideharu;Kato, Ikumi;Matsuyama, Motonobu;Endo, Takeshi. And the article was included in Macromolecules (Washington, DC, United States) in 2008.Formula: C14H12S2 This article mentions the following:

Two acrylamides containing proline and hydroxyproline moiety, N-acryloyl-L-proline (A-Pro-OH) and N-acryloyl-4-trans-hydroxy-L-proline (A-Hyp-OH), were polymerized by reversible addition-fragmentation chain transfer (RAFT) process to afford well-defined amino acid based polymers. Two chain transfer agents (CTAs), benzyl dithiobenzoate (CTA 1) and benzyl 1-pyrrolecarbodithioate (CTA 2), were compared for the direct polymerization of these monomers without protecting chem. With 2,2′-azobis(isobutyronitrile) as an initiator, the dithiocarbamate-type RAFT agent (CTA 2) was efficient for the controlled synthesis of poly(A-Pro-OH)s, which can be regarded as a weak polyelectrolyte. Controlled character of the polymerization of A-Hyp-OH, which has a carboxylic acid and a hydroxyl group in the monomer unit, in the presence of CTA 1 was confirmed by the formation of narrow polydispersity products and the linear relationship between the mol. weight and conversion. Water-soluble poly(A-Hyp-OH)s with number-average mol. weights between 8.2 × 10³ and 2.21 × 10⁴ and relatively low polydispersities were obtained, depending on the monomer/CTA ratio. Their methylated samples, poly(A-Pro-OMe) and poly(A-Hyp-OMe), and random copolymers showed characteristic thermal phase transitions in aqueous solutions In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Formula: C14H12S2).

Benzyl benzodithioate (cas: 27249-90-7) 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, including apples, durians, pears, bananas, pineapples, and strawberries. 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.Formula: C14H12S2

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

Synthesis and Evaluation of Metabotropic Glutamate Receptor Subtype 5 Antagonists Based on Fenobam was written by Gichinga, MosesG.;Olson, Jeremy P.;Butala, Elizabeth;Navarro, Hernan A.;Gilmour, Brian P.;Mascarella, S. Wayne;Carroll, F. Ivy. And the article was included in ACS Medicinal Chemistry Letters in 2011.Safety of 3-Cyanophenylisocyanate This article mentions the following:

In an effort to discover potent and selective metabotropic glutamate receptor subtype 5 (mGluR5) antagonists, 15 tetrahydropyrimidinone analogs of 1-(3-chlorophenyl)-3-(1-methyl-4-oxo-4,5-dihydro-1H-imidazol-2-yl)-urea (fenobam) were synthesized. These compounds were evaluated for antagonism of glutamate-mediated mobilization of internal calcium in an mGluR5 in vitro efficacy assay. The IC₅₀ value for 1-(3-chlorophenyl)-3-(1-methyl-4-oxo-1,4,5,6-tetrahydropyrimidine)urea was essentially identical to that of fenobam. In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6Safety of 3-Cyanophenylisocyanate).

3-Cyanophenylisocyanate (cas: 16413-26-6) 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.Safety of 3-Cyanophenylisocyanate

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

Complexation of hexosammonium ions: evidence for contributions from OH···OH hydrogen bonds in a hydroxylic medium was written by Savage, Paul B.;Gellman, Samuel H.. And the article was included in Journal of the American Chemical Society in 1993.Application In Synthesis of (2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate This article mentions the following:

The synthesis and complexation properties of macrocycle 3 (I) are described. Simpler macrocycle 1 (II) was previously shown to bind primary ammonium ions in CDCl₃/CD₃OD mixtures; the authors now report that 3 binds hexosammonium ions in 10 volume% CD₃OD in CDCl₃. The following K_a values were measured for 3 and several hexosamine-HCl as their (p-tert-butylbenzyl)thioglycoside derivatives: β-glucosammonium (3,000 M^-1), α-glucosammonium (2,800 M^-1), β-galactosammonium (1,400 M^-1), β-mannosammonium (1,000 M^-1), α-mannosammonium (2,200 M^-1). Macrocycle 3 binds cyclohexylammonium chloride with a K_a of only 570 M^-1, i.e., significantly less strongly than the hexosammonium ions. In contrast, macrocycle 1 binds cyclohexylammonium chloride more tightly than the hexosammonium ions (e.g., 1,700 M^-1 for 1 + cyclohexylammonium chloride vs. 870 M^-1 for 1 + β-glucosammonium derivative). Thus, interactions between the peripheral hydroxyl groups of macrocycle 3 and the monosaccharide hydroxyls contribute to the stability of the bound state. This observation is particularly interesting in light of the fact that the solvent (2.5 M CD₃OD) contains ample hydroxyl groups for competitive H-bonding interaction. In the experiment, the researchers used many compounds, for example, (2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate (cas: 6730-10-5Application In Synthesis of (2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate).

(2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate (cas: 6730-10-5) 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.Application In Synthesis of (2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate

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