Author: Jessica.F

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:
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Ester – an overview | ScienceDirect Topics

Formula: C15H28O2《Iridium-Catalyzed Reductive Allylation of Esters》 was published in 2019. The authors were Xie, Lan-Gui;Rogers, Jack;Anastasiou, Ioannis;Leitch, Jamie A.;Dixon, Darren J., and the article was included in《Organic Letters》. The author mentioned the following in the article:

The catalytic reductive transformation of carboxylic esters into α-branched ethers is described. The procedure pivots on the chemoselective iridium-catalyzed hydrosilylation of ester and lactone functionality to afford a silyl acetal intermediate. Upon treatment with a Lewis acid, these hemilabile intermediates dissociate to form reactive oxocarbenium ions, which can be intercepted by allyltributyltin nucleophiles, resulting in the formation of valuable α-branched alkyl-alkyl ether derivatives This reductive allylation procedure was found to be amenable to a range of carboxylic ester starting materials, and good chemoselectivity for Et over tert-Bu esters was demonstrated. Furthermore, downstream synthetic manipulation of α-amino acid-derived products led to the efficient formation of pyrrolidine, piperidine, and azepane frameworks. 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.Formula: C15H28O2 It is a macrocyclic lactone that can be used as a flavoring agent and fragrance ingredient due to its musk flavor/odor.

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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Electric Literature of C19H36O2In 2022, Lim, Hyun-Hee;Choi, Kyeong-Yun;Shin, Ho-Sang published 《Flavor components in tobacco capsules identified through non-targeted quantitative analysis》. 《Journal of Mass Spectrometry》published the findings. The article contains the following contents:

Tobacco flavors increase the attractiveness of a tobacco brand and ultimately promote addiction. Information about what flavor and how much flavor is in flavor capsules can provide an effective way to regulate tobacco flavor. In this study, 128 flavor chems. were identified and quantified by gas chromatog.-mass spectrometry using libraries and authentic standards Validation of the developed method was performed for interference, detection limits, calibration curves, accuracy, and precision. Menthol was the main ingredient in all capsules, and the carcinogenic pulegone was detected. Detected menthofuran, benzyl alc., geraniol, and eugenol cause toxic or severe irritation, and detected lactones can increase nicotine addiction by inhibiting nicotine metabolism in smokers. Margin of exposures for carcinogenic pulegone and non-carcinogenic menthol were well below safety thresholds, indicating a significant risk of inhalation exposure. It is desirable to prohibit the use of flavor capsules in consideration of human risk. And Methyl oleate (cas: 112-62-9) was used in the research process.

Methyl oleate(cas: 112-62-9) is a fatty acid methyl ester resulting from the formal condensation of the carboxy group of oleic acid with methanol.Electric Literature of C19H36O2 Methyl oleate(cas: 112-62-9) is an intermediate for detergents, emulsifiers, wetting agents, stabilizers, textile treatments, plasticizers for duplicating inks, rubbers, waxes etc.

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

Qin, Lu;Jiang, Hui;Tian, Jiang;Zhao, Jing;Liao, Hong published 《Rhizobia enhance acquisition of phosphorus from different sources by soybean plants》 in 2011. The article was appeared in 《Plant and Soil》. They have made some progress in their research.Product Details of 129832-03-7 The article mentions the following:

Some rhizobia can convert insoluble P into available forms for plant growth but the underlying mechanisms for this are not understood. In this study, the function of rhizobia in P acquisition from P sources for soybean was studied. Four rhizobial strains were employed to evaluate their phosphate-solubilizing (PS) activity, their ability to mediate pH changes in growth medium for different P sources, and IAA production A sand culture experiment using different P sources was carried out to characterize P acquisition changes of soybean plants with or without rhizobium inoculation. Rhizospheric acidification in soybean was further analyzed in hydroponics. Our results showed that all the tested rhizobial strains exhibited significant PS activity for different P sources in the order of Ca-P>Al-P>Phy-P≥Fe-P as indicated by the halo/colony ratio technique and increased Pi percentage in the solid and liquid phases, resp. Furthermore, all of the rhizobial strains could acidify the growth medium for all P sources except Phy-P, but only three of them produced IAA. Compared to non-nodulated plants, the nodulated plants had greater plant biomass and P content in sand culture for all the tested P sources, especially for Ca-P. Moreover, H⁺ and total acid exudation was more significantly enhanced in the nodulated plants in hydroponics. Conclusions Our results suggested that the PS ability of rhizobia is more related to acidification of the growth medium than IAA production Rhizobium inoculation could enhance P acquisition in soybean, especially on soils where Ca-P is the primary P source, and the primary mechanism for rhizobial-mediated P solubilization appears to be via Pi remobilization of nodulated roots through rhizospheric acidification. The experimental procedure involved many compounds, such as rel-(1R,2r,3S,4R,5s,6S)-Cyclohexane-1,2,3,4,5,6-hexayl hexakis(dihydrogen phosphate), dipotassium salt (cas: 129832-03-7) .

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.Product Details of 129832-03-7

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Related Products of 112-62-9In 2022, Daridon, Jean-Luc;Bazile, Jean-Patrick;Nasri, Djamel published 《Speed of Sound, Density, and Related Thermophysical Properties of the Methyl Caprate + Methyl Oleate Binary System from 0.1 MPa to 70 MPa at 303.15 K》. 《International Journal of Thermophysics》published the findings. The article contains the following contents:

In this work, we reported values of speed of sound and d. of the Me caprate + Me oleate binary system over the whole composition range from 0% to 100% for pressures ranging from 0.1 MPa to 70 MPa and at 303.15 K. A pulse-echo technique working by reflection was used to measure the speed of sound w at 3 MHz. A vibrating U-tube densimeter was used to obtain d. data. From the combination of both these measurements, the isothermal and isentropic compressibilities were determined Finally, the speed of sound mol. weight product and the mol. compressibility Κm, also known as Wada’s constant, were calculated and represented as function of molar fraction in order to determine the best combining rule for predicting the speed of sound of the mixture from pure Fatty Acid Me Ester properties. And Methyl oleate (cas: 112-62-9) was used in the research process.

Methyl oleate(cas: 112-62-9) is a fatty acid methyl ester resulting from the formal condensation of the carboxy group of oleic acid with methanol.Related Products of 112-62-9 It is also used in biochemical research as a chromatographic reference standard.

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

Synthetic Route of C15H28O2In 2021, Kalana, U. L. D. Inush;Datta, Partha P.;Hewawasam, Rukshika S.;Kiesewetter, Elizabeth T.;Kiesewetter, Matthew K. published 《Organocatalytic ring-opening polymerization of thionolactones: anything O can do, S can do better》. 《Polymer Chemistry》published the findings. The article contains the following contents:

The H-bond mediated organocatalytic ring-opening polymerizations (ROPs) of four new thionolactone monomers are discussed. The kinetic and thermodn. behavior of the ROPs is considered in the context of the parent lactone monomers. Organocatalysts facilitate the retention of the S/O substitution as well as the synthesis of copolymers. The thionoester moieties in the polymer backbone serve as a chem. handle for a facile crosslinking reaction, and the porosity of the resulting crosslinked polymer can be tuned by altering the thioester d. in the (co)polymer. The crosslinked polymers are shown to be degradable in water, and an Au³⁺ recovery application is demonstrated. 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.Synthetic Route 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

HPLC of Formula: 124-06-1《Effect of purification methods on functional properties of sardine oil ethyl esters》 was published in 2022. The authors were Zhang, Mengna;Chen, Zhigang;Shen, Qing, and the article was included in《Journal of Food Processing and Preservation》. The author mentioned the following in the article:

In this study, four methods including urea complexation (UC), mol. distillation (MD), low-temperature crystallization (LTC), and Ag+ bonded to mercaptopropyl silica gel column chromatog. (AgMSG-CC) were adopted to purify eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) from sardine oil Et esters (SOEEs). These methods were systematically compared in terms of physicochem. properties, fatty acid (FA) compositions, and volatile flavor compounds to evaluate the performance and find the superior among them. The AgMSG-CC method was superior in enhancing iodine value (IV) and reducing peroxide value (PV), enriching EPA and DHA from 31.63% to 92.19% and removing undesirable volatiles. Its mild exptl. conditions could avoid the degradation and geometrical isomerization of lipids, and the packed AgMSG column could be reused. Multivariate data anal. was applied to provide an integrated and holistic view of correlation coefficients between the samples and FA species. The results supported the critical role of AgMSG-CC method in purifying EPA and DHA. Finally, this method was validated to be accurate and sensitive in the purification of EPA and DHA from SOEEs. Practical applications : High quality of fish oil is related to its high content of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and friendly aroma. However, enrichment methods about purifying fish oil affect the percentages of EPA and DHA, physicochem. indexes and the volatile flavor. In this study, the results demonstrated that Ag+ bonded to mercaptopropyl silica gel column chromatog. was the most effective to purify EPA and DHA as well as remove the undesirable odor volatiles. To complete the study, the researchers used Ethyl tetradecanoate (cas: 124-06-1) .

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.HPLC of Formula: 124-06-1Ethyl 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

Demiray, Hatice;Estep, Alden S.;Tabanca, Nurhayat;Becnel, James J.;Demirci, Betul published 《Chemical constituents from Rheum ribes shoots and its insecticidal activity against Aedes aegypti》. The research results were published in《Revista Brasileira de Farmacognosia》 in 2022.Application In Synthesis of Methyl oleate The article conveys some information:

A phytochem. investigation of hexane extract of Rheum ribes L., Polygonaceae, shoots was analyzed by gas chromatog. with flame ionization dection and mass specrometry and revealed seven components including Me hexadecanoate (Me palmitate) (2.4%), (Z)-9-Me octadecenoate (Me oleate) (2.9%), (Z,Z,Z)-9,12,15-Me octadecatrienoate (Me linolenate) (3.5%), 1-octadecanol (4.3%), (Z,Z)-9,12-Me octadecadienoate (Me linoleate) (5.7%), heptacosane (13.5%), and hexadecanoic acid (palmitic acid) (67.7%). The hexane extract was bioassayed for larvicidal and adult topical activity against an insecticide susceptible strain of Aedes aegypti, the yellow fever mosquito. Results demonstrated a 90% mortality against adults at 5μg/mosquito and first instar larvae at 1μg/μl. The major compound hexadecanoic acid showed 20% mortality at 6.25 ppm against adults whereas the compound provided 100% mortality at the highest screening dose of 1000 ppm against 1st instar larvae. The mosquitocidal activity of the analyzed plant material may be related to a specific combination of compounds present in the hexane extract Graphical abstract And Methyl oleate (cas: 112-62-9) was used in the research process.

Methyl oleate(cas: 112-62-9) is an intermediate for detergents, emulsifiers, wetting agents, stabilizers, textile treatments, plasticizers for duplicating inks, rubbers, waxes etc.Application In Synthesis of Methyl oleate It is also used in biochemical research as a chromatographic reference standard.

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

Related Products of 99-36-5In 2020, Larson, Nicholas R.;Zhang, Aijun;Feldlaufer, Mark F. published 《Fumigation activities of methyl benzoate and its derivatives against the common bed bug (Hemiptera: Cimicidae)》. 《Journal of Medical Entomology》published the findings. The article contains the following contents:

Common bed bug Cimex lectularius (L.) (Hemiptera: Cimicidae) infestations are on the rise and due to the development of pesticide resistance they are becoming more difficult to control, affordably. We evaluated a naturally occurring compound Me benzoate (MB) and related analogs, previously reported to have insecticidal activity on several agricultural pests, for its fumigant action on the common bed bug, C. lectularius L. A discriminating concentration was used to determine the effectiveness of MB, and several of its analogs as fumigants in a laboratory assay. It was found that MB provided >90% control of adult bed bugs in this laboratory fumigant assay. The LC₅₀ values were calculated for MB against both a pyrethroid-susceptible and a pyrethroidresistant strain of common bed bugs. It was determined that both strains were susceptible in this laboratory assay. However, when MB was tested in a field-like assay and compared to a com. available bed bug control product, it was found to be significantly less effective compared to the com. product. Our study has found that while MB has the potential to be used as a bed bug control agent, refinements in the delivery system will be needed to increase efficacy under field-like conditions.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.Related Products of 99-36-5 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

Name: Diethyl cyclobutane-1,1-dicarboxylate《Preparation of hydantoins containing a cycloalkyl substituent》 was published in 1952. The authors were Henze, Henry R.;Gayler, Cecil Winston, and the article was included in《Journal of the American Chemical Society》. The author mentioned the following in the article:

(BrCH₂)₂CH₂ was converted in 56% yield to Br(CH₂)₃CN, b₅ 75°, b₇₅₄ 208°, n_D²⁵ 1.4752, d₄²⁵ 1.4810, and this further in 77% yield to CH₂.CH₂.CHCN (I), b₂₀ 35-9°, b₇₅₅ 133-5°, n_D²⁵ 1.4208, d₄²⁵ 0.9131. PhMgBr (from 32 g. PhBr) in Et₂O and 11 g. I yielded 15.7 g. (78.5%) CH₂.CH₂.CHCOPh (II), b₂₀ 125°, n_D²⁰ 1.5525, d₄²⁵ 1.1456. Similarly was prepared CH₂.CH₂.CHCO(CH₂)₂CHMe₂ (III), 68%, b₄ 69-70°, n_D²⁰ 1.4395, d₄²⁰ 0.8790; 2,4-dinitrophenylhydrazone, m. 95°. CH₂.(CH₂)₂.C(CO₂Et)₂, b₁₀ 106-7°, n_D²⁰ 1.4335, d₄²⁰ 1.0350, was prepared in 44% yield from (BrCH₂)₂CH₂, CH₂(CO₂Et)₂, and NaOEt, hydrolyzed with alc. KOH, and the dicarboxylic acid decarboxylated at 210° to give 68% CH₂.(CH₂)₂.CHCO₂H (IV), b₈ 88-90° b₇₅₄ 190°, n_D²⁰ 1.4400, d₄²⁰ 1.0470. IV treated with SOCl₂ yielded 85% CH₂.(CH₂)₂. CHCOCl (V), b₇₅₀ 137°. V gave with C₆H₆ and AlCl₃ 35-55% CH₂.(CH₂)₂.CHBz, (VI), b₈ 122-5°, b₇₅₀ 260-2°, n_D²⁰ 1.5415, d₄²⁰ 1.0467. AcNH₂ (100 g.), 0.14-0.3 mol. KCN in its own weight of H₂O, 0.1-0.2 mol. II, III, or VI, and 0.3-0.6 mol. (NH₄)₂CO.₃ heated 20 hrs. in a glass-lined steel bomb at 110-25° and the mixture cooled, diluted with 100-200 cc. H₂O, and acidified yielded the following 5,5-disubstituted hydantoins (substituents given): 56% CH₂.CH₂.CH, Ph, m. 211.5° (corrected); 15% CH₂.CH₂.CH, iso-Am, m. 176-7° (corrected); and 85% CH₂.(CH₂)₂.CH, Ph (VII), m. 234.5-5° (corrected), resp. Catalytic hydrogenation of VII with PtO in EtOH yielded 70% 5-cyclobutyl-5-cyclohexylhydantoin, m. 254-5° (corrected). AcNH₂ (175 g.), 27 g. 2-methylcyclopentyl Me ketone, 19.5 g. KCN, and 62 g. (NH₄)₂CO₃ heated 10 hrs. in a closed container at 110° and the product fractionally crystallized from Me₂CO yielded 9 g. (17%) trans-5-(2-methylcyclopentyl)-5-methylhydantoin (VIII), white plates, m. 228-30° (corrected), and 34% cis-isomer (IX) of VIII, white needles, m. 176-7° (corrected). In a similar run carried out in 50% EtOH at 65°, the yields of VIII and IX were 41% each. 2,3-dimethylcyclopentyl Me ketone was converted similarly in 50% EtOH medium to 62% 5-(2,3-dimethylcyclopentyl)-5-methylhydantoin, which was separated by fractionated crystallization into 2 isomers, m. 145-50° and 220-5°. And Diethyl cyclobutane-1,1-dicarboxylate (cas: 3779-29-1) was used in the research process.

Diethyl cyclobutane-1,1-dicarboxylate (cas:3779-29-1
) is a solid catalyst that can be used in the synthesis of alkylating agents. It is used in the manufacture of cyclopropyl ketones and has been shown to exhibit anticancer properties.

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