Tag: 100-200

Changes in volatile compound profiles of cold-pressed berry seed oils induced by roasting was written by Mildner-Szkudlarz, Sylwia;Rozanska, Maria;Gaca, Anna;Jelen, Henryk H.. And the article was included in LWT–Food Science and Technology in 2021.Synthetic Route of C6H12O2 This article mentions the following:

This study aimed to compare the volatile compounds of cold-pressed oils obtained from unroasted and roasted chokeberry, raspberry, blackcurrant, and strawberry seeds using comprehensive gas chromatog.-mass spectrometry coupled to time of flight mass spectrometry (GC x GC-ToFMS). It is found that the seed type used and chem. composition affected the final aroma of berry oils. The volatile profiles of all berry oils from both unroasted and roasted seeds were dominated by nonheterocyclic chem. class (89% of the total volatiles) with esters predominant (32% of total nonheterocyclic compounds). Unroasted raspberry and blackcurrant cold-pressed seed oils had a less complex volatile profile, and showed similarities between them and differences to chokeberry and strawberry seed oils. Chokeberry seed oil was characterized by the highest levels in Et propanoate, methylbutyl acetate, benzaldehyde, (E,E)-2,4-decadienal, acetoin, 3-penten-2-one, benzyl alc. and strawberry seed oil by Me acetate, iso-Bu acetate, Me 2-methylbutanoate, Et 2-hydroxypropanoate, Et 2-methylbutanoate, Et 3-methylbutanoate, (E,E)-2,4-heptadienal, 1-penten-3-one, and 3,7-dimethyl-1,6-octadien-3-ol. N-containing and furanic-containing compounds contributed about 5% and 4%-16%, resp., of total amount of volatiles after seed roasting. Roasting was critical for increasing the concentration of compounds derived from lipid peroxidation, especially in blackcurrant seed oils. Profiling volatiles using SPME-GC x GC-ToFMS might be helpful in evaluating oils quality. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Synthetic Route of C6H12O2).

Methyl2-methylbutyrate (cas: 868-57-5) 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. 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.Synthetic Route of C6H12O2

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

Efficient synthesis of functionalized chromones via a two-base mediated formal [3+3] cycloaddition was written by Dong, Qian;Shen, Hong C.;Jiang, Min. And the article was included in Tetrahedron Letters in 2016.Synthetic Route of C9H10O3S This article mentions the following:

An efficient one-pot synthesis of functionalized chromones from ketone derivatives and o-haloaroyl chlorides was achieved using a combination of two bases under transition-metal-free conditions. This formal [3+3] cycloaddition consists of a sequential C-acylation and O-arylation, which is amenable to a broad range of substrates leading to diversely functionalized chromones in moderate to high yields. Notably, the utility of this methodol. was demonstrated by a two-step concise synthesis of frutinone A. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8Synthetic Route of C9H10O3S).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) 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. 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.Synthetic Route of C9H10O3S

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

Potent Inhibitors of the Qi Site of the Mitochondrial Respiration Complex III was written by Bolgunas, Stephen;Clark, David A.;Hanna, Wayne S.;Mauvais, Patricia A.;Pember, Steve O.. And the article was included in Journal of Medicinal Chemistry in 2006.Category: esters-buliding-blocks This article mentions the following:

A series of azole-fused salicylamides, e.g. I (X, Y = N, CH; R = H, F₃C), were prepared as analogs of antimycin and assayed for activity at complex III of the mitochondrial respiratory chain. The activity of these compounds approached that of antimycin in inhibitory potency and some showed growth reduction of Septoria nodorum in vitro. I (X = N; Y = CH; R = H) was shown to bind at the Qi site of complex III by red-shift titration of the bc₁ complex. In the experiment, the researchers used many compounds, for example, Methyl 2-methoxy-4-methylbenzoate (cas: 81245-24-1Category: esters-buliding-blocks).

Methyl 2-methoxy-4-methylbenzoate (cas: 81245-24-1) 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. 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.Category: esters-buliding-blocks

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

Conformationally-restricted vigabatrin analogs as irreversible and reversible inhibitors of γ-aminobutyric acid aminotransferase was written by Pan, Yue;Calvert, Kristi;Silverman, Richard B.. And the article was included in Bioorganic & Medicinal Chemistry in 2004.Electric Literature of C10H16O2 This article mentions the following:

Compounds that inhibit γ-aminobutyric acid aminotransferase exhibit anticonvulsant activity; vigabatrin is a known irreversible inhibitor of this enzyme and anticonvulsant drug. Conformationally-restricted, five-membered- and six-membered-ring vigabatrin analogs were synthesized and tested as inhibitors of γ-aminobutyric acid aminotransferase. Two monofluorinated compounds, I (R¹ = F, R² = H; R¹ = H, R² = F), are time-dependent inhibitors of the enzyme, and their potencies are comparable to that of vigabatrin. II (R¹ = NH₂, R² = H; R¹ = H, R² = NH₂) are weak reversible inhibitors. In the experiment, the researchers used many compounds, for example, Ethyl 4-methylenecyclohexanecarboxylate (cas: 145576-28-9Electric Literature of C10H16O2).

Ethyl 4-methylenecyclohexanecarboxylate (cas: 145576-28-9) 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. 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.Electric Literature of C10H16O2

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

Analysis of volatile odor compounds and aroma properties of European vinegar by the ultra-fast gas chromatographic electronic nose was written by Liu, Ruo-Chen;Li, Rong;Wang, Ying;Jiang, Zi-Tao. And the article was included in Journal of Food Composition and Analysis in 2022.Electric Literature of C6H12O2 This article mentions the following:

Vinegar is a very popular condiment with different species and aroma profiles. Eighty-three volatile odor compounds (VOCs) were identified from European vinegar using ultra-fast gas chromatog. electronic nose (UFGC E-nose), of which there were 61 VOCs with odor activity value (OAV) ≥ 1. Among the 61 VOCs, acetic acid, Et isovalerate, propionaldehyde, butanoic acid, Et cinnamate, and guaiacol contributed significantly to the aroma property and type of European vinegar. There were obvious clustering trends of apple vinegar, wine vinegar, and balsamic vinegar in principal component anal. (PCA). The clustering of the vinegar-like groups was more obvious in orthogonal partial least squares discriminant anal. (OPLS-DA). The volatile markers discriminating vinegar, including acetic acid, propionic acid, pyrazine, furfural, iso-Pr alc., and so on, were screened out by variable importance for the projection (VIP). These results demonstrated that UFGC E-nose is a novel, rapid and non-destructive anal. tool and can also be used for identifying aroma compounds and tracing the food species. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Electric Literature of C6H12O2).

Methyl2-methylbutyrate (cas: 868-57-5) 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. 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.Electric Literature of C6H12O2

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

Method for Direct Synthesis of α-Cyanomethyl-β-dicarbonyl Compounds with Acetonitrile and 1,3-Dicarbonyls was written by Wang, Chenyang;Li, Yabo;Gong, Ming;Wu, Qi;Zhang, Jianye;Kim, Jung Keun;Huang, Mengmeng;Wu, Yangjie. And the article was included in Organic Letters in 2016.COA of Formula: C9H10O3S This article mentions the following:

A novel and efficient method for the synthesis of α-cyanomethyl-β-dicarbonyls in moderate to excellent yields is developed by using inactive CH₃CN and simple 1,3-dicarbonyls. A radical mechanism is proposed under the ESI-MS (electrospray ionization mass spectrometry) anal. results of control experiments In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8COA of Formula: C9H10O3S).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. 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.COA of Formula: C9H10O3S

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

Application of palladium-catalyzed aryl C-H alkylation in total synthesis of (-)-berkelic acid was written by Wang, Hui-Hong;Wang, Xiao-Dong;Cao, Fei;Gao, Wei-Wei;Ma, Shu-Meng;Li, Zhao;Deng, Xue-Mei;Shi, Tao;Wang, Zhen. And the article was included in Organic Chemistry Frontiers in 2021.Recommanded Product: Methyl2-methylbutyrate This article mentions the following:

An unprecedented palladium(II)-catalyzed ortho-alkylation of N-methoxybenzamide RC(O)NHOCH₃ (R = C₆H₅, 3-ClC₆H₄, 2,4-(OCH₃)₂C₆H₃, etc.) with epoxides like 2-pentyloxirane has been applied to the total synthesis of the isochroman natural product (-)-berkelic acid. Combining this strategy with a well documented spiroacetalization cascade reaction, (-)-berkelic acid is obtained in 13.9% overall yield with the longest linear sequence of 11 steps. The results of preliminary biol. studies on the synthesized natural product and its analogs are also reported. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Recommanded Product: Methyl2-methylbutyrate).

Methyl2-methylbutyrate (cas: 868-57-5) 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. 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.Recommanded Product: Methyl2-methylbutyrate

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

Characterization of the Volatile Compounds in Camellia oleifera Seed Oil from Different Geographic Origins was written by Wang, Jing;Tang, Xuxiao;Chu, Qiulu;Zhang, Mengyu;Zhang, Yingzhong;Xu, Baohua. And the article was included in Molecules in 2022.Quality Control of 5-Hexyldihydrofuran-2(3H)-one This article mentions the following:

Volatile flavor of edible oils is an important quality index and factor affecting consumer choice. The purpose of this investigation was to characterize virgin Camellia oleifera seed oil (VCO) samples from different locations in southern China in terms of their volatile compounds to show the classification of VCO with respect to geog. Different samples from 20 producing VCO regions were collected in 2020 growing season, at almost the same maturity stage, and processed under the same conditions. Headspace solid-phase microextraction (HS-SPME) with a gas chromatog.-mass spectrometer system (GC-MS) was used to analyze volatile compounds A total of 348 volatiles were characterized, including aldehydes, ketones, alcs., acids, esters, alkenes, alkanes, furans, phenols, and benzene; the relative contents ranged from 7.80-58.68%, 1.73-12.52%, 2.91-37.07%, 2.73-46.50%, 0.99-12.01%, 0.40-14.95%, 0.00-27.23%, 0.00-3.75%, 0.00-7.34%, and 0.00-1.55%, resp. The VCO geog. origins with the largest number of volatile compounds was Xixiangtang of Guangxi (L17), and the least was Beireng of Hainan (L19). A total of 23 common and 98 unique volatile compounds were detected that reflected the basic and characteristic flavor of VCO, resp. After PCA, heatmap and PLS-DA anal., Longchuan of Guangdong (L8), Qingshanhu of Jiangxi (L16), and Panlong of Yunnan (L20) were in one group where the annual average temperatures are relatively low, where annual rainfalls are also low. Guangning of Guangdong (L6), Yunan of Guangdong (L7), Xingning of Guangdong (L9), Tianhe of Guangdong (L10), Xuwen of Guangdong (L11), and Xiuying of Hainan (L18) were in another group where the annual average temperatures are relatively high, and the altitudes are low. Hence, volatile compound distributions confirmed the differences among the VCO samples from these geog. areas, and the provenance difference evaluation can be carried out by flavor. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Quality Control of 5-Hexyldihydrofuran-2(3H)-one).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) 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.Quality Control of 5-Hexyldihydrofuran-2(3H)-one

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

Biochar reduces volatile organic compounds generated during chicken manure composting was written by Sanchez-Monedero, M. A.;Sanchez-Garcia, M.;Alburquerque, J. A.;Cayuela, M. L.. And the article was included in Bioresource Technology in 2019.Formula: C6H12O2 This article mentions the following:

The efficiency of biochar for reducing the levels of volatile organic compounds (VOC) was investigated in a composting mixture containing 90% poultry manure and 10% straw (with and without 3% biochar addition) at three different stages of the process. The use of a low application rate of biochar reduced the concentration of VOC during the thermophilic phase. Biochar significantly reduced the levels of nitrogen volatile compounds, which are the most abundant VOC family, originated from microbial transformation of the N-compounds originally present in manure. The most efficient VOC reduction was observed in oxygenated volatile compounds (ketones, phenols and organic acids), which are intermediates of organic matter degradation, whereas there was no effect on other VOC families (aliphatic, aromatic and terpenes). These results suggest the importance of not only the sorption capacity of biochar but also its impact in the composting progress as main drivers for VOC reduction In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Formula: C6H12O2).

Methyl2-methylbutyrate (cas: 868-57-5) 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 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. Formula: C6H12O2

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

Volatile organic compounds from Citrus australasica growing in Basilicata (Southern Italy) was written by D′Auria, Maurizio;Racioppi, Rocco. And the article was included in Natural Product Research.Electric Literature of C6H12O2 This article mentions the following:

SPME-GCMS anal. of vesicles of Sanguinea cultivar showed the presence of limonene (45.63%), sabinene (22.65%), and bicyclogermacrene (10.80%). The anal. of the peel showed that the main components were limonene (48.24%), sabinene (37.15%), and α-pinene (4.26%). In Pink Ice cultivar the main components of the vesicles were sabinene (31.68%), limonene (20.71%), and bicyclogermacrene (14.18%). Peel anal. showed the presence of limonene (37.68%), sabinene (33.33%), and α-pinene (5.55%). In Faustrime limonene (51.54%), γ-terpinene (10.01%), α-bergamotene (7.48%), β-bisabolene (7.07%), and a-phellandrene (5.68%) were detected. In peel anal. limonene (27.84%), α-pinene (9.41%), γ-terpinene (10.00%), and citronellal (10.51%) were found. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Electric Literature of C6H12O2).

Methyl2-methylbutyrate (cas: 868-57-5) 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. 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.Electric Literature of C6H12O2

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