Category: esters-buliding-blocks

Karabagias, Ioannis K.;Karabagias, Vassilios K.;Nayik, Gulzar Ahmad;Gatzias, Ilias;Badeka, Anastasia V. published 《A targeted chemometric evaluation of the volatile compounds of Quercus ilex honey in relation to its provenance》 in 2022. The article was appeared in 《LWT–Food Science and Technology》. They have made some progress in their research.Category: esters-buliding-blocks The article mentions the following:

The present study aimed at the determination of volatile compounds (VOCs) of Greek Quercus ilex honey, which comprises a rarely studied honeydew honey, from different regions and to characterize its provenance using a targeted chemometric evaluation of the semi-quant. data of VOCs determined with headspace solid phase microextraction coupled to gas chromatog./mass spectrometry (HS-SPME/GC-MS). Principal component anal. (PCA), multivariate anal. of variance (MANOVA) and stepwise linear discriminant anal. (SLDA) showed that provenance affected the volatile composition of Quercus ilex honey. The PCA explained 98.10% of total variance with the factors that maximized the squared cosine to be 10 VOCs: heptane, dimethyl-disulfide, octane, nonane, styrene, alpha-pinene, meta-cymene, DL-limonene, 1-decanol, and tetradecanoic acid Et ester. The SLDA resulted in the formation of linear discriminant functions that provided a classification rate of honey samples according to provenance by ∼80%, based on styrene, eucalyptol, benzeneacetaldehyde, 1-decanol, and tetradecanoic acid Et ester. Considering the complementary results of PLS-VIP (partial least squares anal.-variable importance in projection) eucalyptol, 1-decanol, and tetradecanoic acid Et ester are proposed as volatile indicators of the provenance of Greek Quercus ilex honey. These VOCs were also correlated with the percent of Castanea sativa and Polygonum aviculare pollen grains.Ethyl tetradecanoate (cas: 124-06-1) were involved in the experimental procedure.

Ethyl tetradecanoate(cas: 124-06-1) is a labeled component from essential oil of natural hawthorn perfume. Also frequently used in cosmetics, soaps, and flavorings.Category: esters-buliding-blocksEthyl myristate is a long-chain fatty acid ethyl ester resulting from the formal condensation of the carboxy group of myristic acid with the hydroxy group of ethanol.

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

Synthetic Route of C15H28O2《Polymeric nanoparticles for the delivery of miRNA to treat Chronic Obstructive Pulmonary Disease (COPD)》 was published in 2019. The authors were Mohamed, Adel;Kunda, Nitesh K.;Ross, Kehinde;Hutcheon, Gillian A.;Saleem, Imran Y., and the article was included in《European Journal of Pharmaceutics and Biopharmaceutics》. The author mentioned the following in the article:

RNA interference (RNAi) based therapeutics are considered an endogenous mechanism for modulating gene expression. In addition, microRNAs (miRNAs) may be tractable targets for the treatment of Chronic Obstructive Pulmonary Disease (COPD). In this study miR146a was adsorbed onto poly (glycerol adipate-co-ω-pentadecalactone), PGA-co-PDL, nanoparticles (NPs) to reduce target gene IRAK1 expression. NPs were prepared using an oil-in-water single emulsion solvent evaporation method incorporating cationic lipid dioleoyltrimethylammoniumpropane (DOTAP). This resulted in NPs of 244.80 ± 4.40 nm at 15% DOTAP concentration, zeta potential (ZP) of +14.8 ± 0.26 mV and miR-146a (40μg/mL) maximum adsorption onto 15% DOTAP NPs was 36.25 ± 0.35μg per 10 mg NP following 24 h incubation. Using the MTT assay, it was observed that over 75% at 0.312 mg/mL of A549 cells remained viable after 18 h exposure to cationic NPs at a concentration of 1.25 mg/mL. Furthermore, the in vitro release profile of miR-146a from loaded NPs showed a continuous release up to 77% after 24 h. Internalization of miR-146a loaded cationic NPs was observed in A549 cell lines using fluorescence and confocal microscopy. The miR146a delivered as miR-146a-NPs had a dose dependent effect of highest NPs concentrations 0.321 and 0.625 mg/mL and reduced target gene IRAK1 expression to 40%. In addition, IL-8 promoter reporter output (GFP) was dampened by miR-146a-NPs. In conclusion, miR-146a was successfully adsorbed onto PGA-co-PDL-DOTAP NPs and the miR-146a retained biol. activity. Therefore, these results demonstrate the potential of PGA-co-PDL NPs as a delivery system for miR-146a to treat COPD. To complete the study, the researchers used Oxacyclohexadecan-2-one (cas: 106-02-5) .

Oxacyclohexadecan-2-one(cas:106-02-5) is a monomer used to make PGA-co-pentadecalactone polymers to be used in the development of directly compressed prolonged release tablets of slightly soluble drugs such as ketoprofen.Synthetic Route of C15H28O2It may be used for the synthesis of poly(pentadecanolide) (PPDL) by Novozyme 435 catalyzed ring-opening polymerization.

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

Computed Properties of C15H28O2《Phytochemical profile and biological activity of endemic Sideritis sipylea Boiss. in North Aegean Greek islands》 was published in 2020. The authors were Axiotis, Evangelos;Petrakis, Eleftherios A.;Halabalaki, Maria;Mitakou, Sofia, and the article was included in《Molecules》. The author mentioned the following in the article:

Sideritis sipylea Boiss. is an endemic plant of the Mediterranean basin that is distributed in the Greek islands of the North Aegean Sea, i.e., Lesvos, Chios, Samos, and Ikaria, and in the West and Middle peninsula of Turkey. It is considered an endangered species because of its uncontrolled collection from its original habitat. Although the antioxidant, anti-inflammatory and antimicrobial properties have been previously reported, the total chem. profile has not yet been explored. In this context, the chem. profiles of the water/methanol (HA), methanol (ME), and Et acetate (EtOAc) extracts were analyzed using ultra-performance liquid chromatog. coupled with high-resolution mass spectrometry (UPLC-HRMS). In parallel, anal. by gas chromatog.-mass spectrometry (GC-MS) was employed for the dichloromethane extract (DCM) as well as for the essential oil (EO) and the extract obtained by supercritical fluid extraction (SFE). Furthermore, the total phenolic content (TPC) along with the in vitro tyrosinase and elastase enzyme inhibitory activity of different extracts was evaluated, towards the discovery of new active agents for cosmetic formulations. These activities are in accordance with its well-known antioxidant and anti-inflammatory properties, confirming the importance of ethnopharmacol. references for S. sipylea in Greece and Turkey. The experimental procedure involved many compounds, such as Oxacyclohexadecan-2-one (cas: 106-02-5) .

Oxacyclohexadecan-2-one(cas:106-02-5) is a natural product found in Lonicera japonica and Angelica archangelica.Computed Properties of C15H28O2 It is a macrocyclic lactone that can be used as a flavoring agent and fragrance ingredient due to its musk flavor/odor.

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

Martinez-Cutillas, Alfredo;Leon, Salvador;Oh, Sejin;Martinez de Ilarduya, Antxon published 《Enzymatic recycling of polymacrolactones》 in 2022. The article was appeared in 《Polymer Chemistry》. They have made some progress in their research.Quality Control of Oxacyclohexadecan-2-one The article mentions the following:

The use of renewable monomers to make new polyesters which could replace the ones obtained from petrochem. resources employing green processes is attracting a lot of attention these days. With this in mind, three different macrolactones, ω-pentadecalactone, globalide and 6-hexadecenlactone, have been polymerized in bulk by enzymic ring opening polymerization (e-ROP) using immobilized Candida antarctica lipase B to give their corresponding polymacrolactones (PMLs). For the first time, these PMLs have been depolymerized enzymically in solution with the concourse of the same enzyme and at mild temperatures GPC, NMR and ESI MS demonstrated that the main products recovered after the enzymic processive recycling were cyclic monomers and dimers, with a small amount of higher size macrocyclic oligoesters (MCOs). It was observed that these depolymerizations followed a Michaelis-Menten kinetic model. Finally it was shown that these MCOs could be repolymd. This research provides a biosynthetic method for chem. recycling of these interesting polymeric materials providing a pathway towards a circular economy. And Oxacyclohexadecan-2-one (cas: 106-02-5) was used in the research process.

Oxacyclohexadecan-2-one(cas:106-02-5) is a natural product found in Lonicera japonica and Angelica archangelica.Quality Control of Oxacyclohexadecan-2-one It is a macrocyclic lactone that can be used as a flavoring agent and fragrance ingredient due to its musk flavor/odor.

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

Related Products of 93-92-5In 2020, Zarini, Daniele;Sangion, Alessandro;Ferri, Emanuele;Caruso, Enrico;Zucchi, Sara;Orro, Alessandro;Papa, Ester published 《Are In Silico Approaches Applicable As a First Step for the Prediction of e-Liquid Toxicity in e-Cigarettes?》. 《Chemical Research in Toxicology》published the findings. The article contains the following contents:

Recent studies have raised concerns about e-cigarette liquid inhalation toxicity by reporting the presence of chems. with European Union CLP toxicity classification. In this scenario, the regulatory context is still developing and is not yet up to date with vaping current reality. Due to the paucity of toxicol. studies, robust data regarding which components in tent. In this study we applied computational methods for studied chems. as a useful tool for predicting the acute toxicity of chems. contained in e-liquids The purpose of t the potential health concerns associated with e-liquid ingredients, (b) to prioritize e-liquid ingredients by calculating the e-tox index, and (c) to estimate acute toxicity of e-liquid mixtures QSAR models were generated using QSARINS software to fill the acute toxicity data gap of 264 e-liquid ingredients. As a second step, the potential acute toxicity of e-liquids mixtures was evaluated. Our preliminary data suggest that a computational approa serve as a roadmap to enable regulatory bodies to better regulate e-liquid composition and to contribute to consumer health protection. To complete the study, the researchers used 1-Phenylethyl acetate (cas: 93-92-5) .

1-Phenylethyl acetate(cas:93-92-5) is a carboxylic ester. Related Products of 93-92-5 It may be prepared by acetylation of methyl phenyl carbinol; from 1-bromoethylbenzene and silver acetate in acetic acid; from benzaldehyde by reacting with magnesium methyl bromide and subsequent acetylation.

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

Deng, Yifan;Yang, Chia-Ping H.;Smith, Amos B. III published 《Enantioselective Total Synthesis of (+)-Peniciketals A and B: Two Architecturally Complex Spiroketals》 in 2021. The article was appeared in 《Journal of the American Chemical Society》. They have made some progress in their research.Application In Synthesis of Methyl 2,4-dihydroxy-3,6-dimethylbenzoate The article mentions the following:

The enantioselective total syntheses of (+)-peniciketals A and B (I and II, resp.), two members of a family of architecturally complex spiroketals, have been achieved. Key synthetic transformations comprise Type I Anion Relay Chem. (ARC) to construct the benzannulated [6,6]-spiroketal skeleton, a Negishi cross-coupling/olefin cross-metathesis reaction sequence to generate the trans-enone structure, and a late-stage large fragment union exploiting our recently developed photoisomerization/cyclization tactic. To complete the study, the researchers used Methyl 2,4-dihydroxy-3,6-dimethylbenzoate (cas: 4707-47-5) .

Methyl 2,4-dihydroxy-3,6-dimethylbenzoate(4707-47-5) is used in biological study as role of androgens in inducing distinct response of epithelial-mesenchymal transition factors in human prostate cancer cells.Application In Synthesis of Methyl 2,4-dihydroxy-3,6-dimethylbenzoate

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

Gu, Yuanyun;Zhang, Zhen;Wang, Yan-En;Dai, Ziteng;Yuan, Yaqi;Xiong, Dan;Li, Jie;Walsh, Patrick J.;Mao, Jianyou published 《Benzylic Aroylation of Toluenes Mediated by a LiN(SiMe₃)₂/Cs⁺ System》 in 2022. The article was appeared in 《Journal of Organic Chemistry》. They have made some progress in their research.Reference of Methyl 3-methylbenzoate The article mentions the following:

Chemoselective deprotonative functionalization of benzylic C-H bonds is challenging, because the arene ring contains multiple aromatic C(sp²)-H bonds, which can be competitively deprotonated and lead to selectivity issues. Recently it was found that bimetallic [MN(SiMe₃)₂ M = Li, Na]/Cs⁺ combinations exhibit excellent benzylic selectivity. Herein, is reported the first deprotonative addition of toluenes to Weinreb amides mediated by LiN(SiMe₃)₂/CsF for the synthesis of a diverse array of 2-arylacetophenones. Surprisingly, simple Me benzoates also react with toluenes under similar conditions to form 2-arylacetophenones without double addition to give tertiary alc. products. This finding greatly increases the practicality and impact of this chem. Some challenging substrates with respect to benzylic deprotonations, such as fluoro and methoxy substituted toluenes, are selectively transformed to 2-aryl acetophenones. The value of benzylic deprotonation of 3-fluorotoluene is demonstrated by the synthesis of a key intermediate in the preparation of Polmacoxib.Methyl 3-methylbenzoate (cas: 99-36-5) were involved in the experimental procedure.

Methyl 3-methylbenzoate (cas: 99-36-5) is a common ester.Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids.Reference of Methyl 3-methylbenzoate Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries.

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

Electric Literature of C15H28O2In 2022, Lee, Woorim;Shin, Jaedon;Lee, Minju;Choi, Yegyun;Son, Heejong;Lee, Yunho published 《Elimination efficiency of synthetic musks during the treatment of drinking water with ozonation and UV-based advanced oxidation processes》. 《Science of the Total Environment》published the findings. The article contains the following contents:

This study investigated the reaction kinetics and elimination efficiency of eleven synthetic musks during ozonation and UV254nm-based, advanced oxidation processes. The synthetic musks containing olefin moieties with electron-donating alkyl substituents such as octahydro tetra-Me naphthalenyl ethanone (OTNE) and ambrettolide (AMBT) showed high reactivity toward ozone (k ≥ 3.7 x 105 M-1 s-1) and free available chlorine (FAC) (k = 9.2 – 88 M-1 s-1), while all other synthetic musks were less ozone reactive (k = 0.3 – 560 M-1 s-1) and FAC-refractory. All synthetic musks showed high •OH reactivity (k > 5 x 109 M-1 s-1), except musk ketone (MK) (k = 2.3 x 109 M-1 s-1). In concordance with the kinetic information, OTNE and AMBT were efficiently eliminated (>97%) in simulated ozone treatments of drinking water at a specific ozone dose of 0.5 gO3/gDOC. The elimination levels of the other synthetic musks were below 50% at 0.5 gO3/gDOC. The fluence-based UV photolysis rate constant of the synthetic musks was determined to be (0.2 – 2.7) x 10-3 cm2/mJ. The elimination levels of synthetic musks during UV alone treatment ranged from 7 to 81% at a UV fluence of 500 mJ/cm2. The addition of 10 mg/L H2O2 (UV/H2O2) significantly enhanced the elimination of most synthetic musks (achieving >90% elimination at 500 mJ/cm2), indicating that the •OH reaction was mainly responsible for their elimination. The addition of 10 mg/L FAC (UV/FAC) also significantly enhanced the elimination of olefinic and aromatic synthetic musks (>90%), for which the reaction with ClO• was mainly responsible. For MK and two alkyl synthetic musks, their elimination during UV/FAC treatment was still limited (28 – 64%) and was mainly achieved by UV photolysis or reaction with •OH. In summary, this study substantiates the chem. kinetics approach as a helpful tool for predicting or interpreting the elimination of micropollutants during oxidative water treatment. And Oxacyclohexadecan-2-one (cas: 106-02-5) was used in the research process.

Oxacyclohexadecan-2-one(cas:106-02-5) is a natural product found in Lonicera japonica and Angelica archangelica.Electric Literature of C15H28O2 It is a macrocyclic lactone that can be used as a flavoring agent and fragrance ingredient due to its musk flavor/odor.

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

Sala, Martin;Makuc, Damjan;Kolar, Jana;Plavec, Janez;Pihlar, Boris published 《Potentiometric and ³¹P NMR studies on inositol phosphates and their interaction with iron(III) ions》 in 2011. The article was appeared in 《Carbohydrate Research》. They have made some progress in their research.Reference of rel-(1R,2r,3S,4R,5s,6S)-Cyclohexane-1,2,3,4,5,6-hexayl hexakis(dihydrogen phosphate), dipotassium salt The article mentions the following:

Potentiometric, conductometric and ³¹P NMR titrations have been applied to study interactions between myo-inositol hexakisphosphate (phytic acid), (±)-myo-inositol 1,2,3,5-tetrakisphosphate and (±)-myo-inositol 1,2,3-trisphosphate with iron(III) ions. Potentiometric and conductometric titrations of myo-inositol phosphates show that addition of iron increases acidity and consumption of hydroxide titrant. By increasing the Fe(III)/InsP₆ ratio (from 0.5 to 4) 3 mol of protons are released per 2 mol of iron(III). At first, phytates coordinate iron octahedrally between P2 and P1,3. The second coordination site represents P5 and neighboring P4,6 phosphate groups. Complexation is accompanied with the deprotonation of P1,3 and P4,6 phosphate oxygens. At higher concentration of iron(III) intermol. P-O-Fe-O-P bonds trigger formation of a polymeric network and precipitation of the amorphous Fe(III)-InsP₆ aggregates. ³¹P NMR titration data complement the above results and display the largest chem. shift changes at pD values between 5 and 10 in agreement with strong interactions between iron and myo-inositol phosphates. The differences in T₁ relaxation times of phosphorous atoms have shown that phosphate groups at positions 1, 2 and 3 are complexated with iron(III). The interactions between iron(III) ions and inositol phosphates depend significantly on the metal to ligand ratio and an attempt to coordinate more than two irons per InsP₆ mol. results in an unstable heterogeneous system. And rel-(1R,2r,3S,4R,5s,6S)-Cyclohexane-1,2,3,4,5,6-hexayl hexakis(dihydrogen phosphate), dipotassium salt (cas: 129832-03-7) was used in the research process.

rel-(1R,2r,3S,4R,5s,6S)-Cyclohexane-1,2,3,4,5,6-hexayl hexakis(dihydrogen phosphate), dipotassium salt (cas:129832-03-7) is also known as Inositol hexakisphosphate. Phytic acid dipotassium salt is a potent chelator of divalent and trivalent cations, and a major determinant of zinc bioavailability.Reference of rel-(1R,2r,3S,4R,5s,6S)-Cyclohexane-1,2,3,4,5,6-hexayl hexakis(dihydrogen phosphate), dipotassium salt

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

Thadhani, Vinitha M.;Mesaik, M. Ahmed;Asif, Muhammad;Karunaratne, Veranja;Choudhary, Iqbal M. published 《Immunomodulatory activities of some common lichen metabolites》. The research results were published in《International Journal of Pharmacy and Pharmaceutical Sciences》 in 2015.Computed Properties of C10H12O4 The article conveys some information:

Objective: To evaluate the immunomodulatory activities of some of the common lichen compounds by using chemiluminescence based cellular assays. Methods:Number of secondary lichen metabolites, representing a breadth of lichen substances, was investigated for their effects on the respiratory burst of human whole blood phagocytes, isolated human polymorphonuclear leukocytes (PMNs) and murine macrophages using luminol or lucigenin-based chemiluminescence probes. Results: This study identify a clear suppressive effect of some lichen metabolites on phagocytosis response upon activation with serum opsonized zymosan by several lichen substances. Amongst the compounds tested, orsellinic acid, Me orsellinate, Me haematomate, lecanoric acid and lobaric acid, showed a potent immunomodulatory activity as compared to the standards The lobaric acid suppressed both the myloperoxidase dependent and myloperoxidase independent, Reactive Oxygen Species (ROS) production in the oxidative burst of polymorphonuclear neutrophils (PMN) at the lowest concentration tested (3.1 μg/mL). Whereas, lecanoric acid, suppressed only the myloperoxidase dependent ROS production with IC50< 3.1 μg/mL when compared to the standard sodium diethyldithiocarbamate trihydrate (SDT) (IC50 = 1.3 ± 0.2 μg/mL). Orsellinic acid, Me orsellinate and Me haematomate showed a selective myloperoxidase independent pathway with IC50 values; < 3.1μg/mL; 6.1 ± 1.0 μg/mL; 3.3 ± 0.1 μg/mL, resp., being lower as compared to standard SDT (IC50= 8.2 ± 1.9 μg/mL). Conclusion: Based on the results obtained it is appropriate to conclude that lichen are not only a good source of antioxidants, but also potent immunomodulators, and thus deserve to be investigated further.Methyl 2,4-dihydroxy-3,6-dimethylbenzoate (cas: 4707-47-5) were involved in the experimental procedure.

Methyl 2,4-dihydroxy-3,6-dimethylbenzoate(4707-47-5) is used in biological study as role of androgens in inducing distinct response of epithelial-mesenchymal transition factors in human prostate cancer cells.Computed Properties of C10H12O4

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