Tag: 100-200

Synthesis of 2-arylimidazo[4,5-d][1,2,3]triazoles from a 4-nitroimidazol-5-yl phosphoramidate and aryl isocyanates was written by Taher, A.;Eichenseher, S.;Weaver, G. W.. And the article was included in Tetrahedron Letters in 2000.Quality Control of 3-Cyanophenylisocyanate This article mentions the following:

The synthesis of a series of 2-aryl-2H,4H-imidazo[4,5-d][1,2,3]triazoles is reported. These compounds are obtained in moderate to good yield by reaction of tri-Et N-1-ethyl-2-methyl-4-nitro-1H-imidazol-5-yl phosphoramidate with aryl isocyanates. In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6Quality Control of 3-Cyanophenylisocyanate).

3-Cyanophenylisocyanate (cas: 16413-26-6) 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. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Quality Control of 3-Cyanophenylisocyanate

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

Effects of highland barley powders with different peeling rates on the rheological properties of dough and sensory, volatile flavor evaluation of bread was written by Zong, Yao;Tian, Shuangqi;Zhang, Yan;Liu, Zixuan;Chen, Zhicheng. And the article was included in Journal of Food Processing and Preservation.HPLC of Formula: 706-14-9 This article mentions the following:

Highland barley has the nutritional characteristics of high protein, high fiber, high vitamin, low fat, and low sugar and is a high-quality cereal crop. In this study, the effect of highland barley powders with different peeling rates on the rheol. properties of dough and bread quality was studied. The ash content in QK0 was as high as 2.19%. After peeling, the ash content decreased significantly. The oil holding capacity of QK4-35% and QK5-35% was lower than that of the control group. From the perspective of health, it was beneficial to the production and promotion of food. The G′ and G” of samples QK4-35% and QK5-35% were relatively close to the control group. The creep and recovery abilities of samples QK4-35% and QK5-35% were better than other highland barley compound doughs. With the increase of the peeling rate of highland barley powder, the overall acceptability of highland barley bread samples increased from 34.9 to 60.1. Highland barley is rich in dietary fiber and β-glucan. To study the influences of highland barley with different peeling rates on the rheol. properties of dough and bread quality, highland barley powder was added with different peeling rates to bread flour. In general, it can be concluded that the addition of highland barley powder endows the bread with more unique flavor substances, thus making the bread more popular among consumers. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9HPLC of Formula: 706-14-9).

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

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

Towards a better understanding of the evolution of odour-active compounds and the aroma perception of sparkling wines during ageing was written by Martinez-Garcia, Rafael;Mauricio, Juan Carlos;Garcia-Martinez, Teresa;Peinado, Rafael A.;Moreno, Juan. And the article was included in Food Chemistry in 2021.Related Products of 706-14-9 This article mentions the following:

A native veil-forming yeast and a com. yeast strain were used to elaborate sparkling wines by the Champenoise method with a grape variety traditionally used for the production of still wines. Wines aged on lees for fifteen months were sampled at five points and their physicochem. and sensory indexes were analyzed. Unsupervised and supervised statistical techniques were used to establish a comparison between 81 volatile compounds and eight odor descriptors (chem., fruity, floral, fatty, balsamic, vegetal, empyreumatic and spicy). Principal component anal. of both datasets showed good separation among the samples in relation to ageing time and yeast strain. By using a partial least squares regression-based criterion, 38 odor active compounds were selected as the most influential for the ageing factor and out of them, only 27 were unique to certain aroma descriptors. These results contribute to a better understanding of the aroma perception of sparkling wines. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Related Products of 706-14-9).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) 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. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Related Products of 706-14-9

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

Synthesis of sp³-Enriched β-Fluoro Sulfonyl Chlorides was written by Gurbanov, Rustam;Sokolov, Andriy;Golovach, Sergey;Melnykov, Kostiantyn;Dobrydnev, Alexey V.;Grygorenko, Oleksandr O.. And the article was included in Synthesis in 2021.Application of 145576-28-9 This article mentions the following:

A three-step approach to the synthesis of sp³-enriched β-fluoro sulfonyl chlorides starting from alkenes is reported. The method was successfully applied to a wide range of acyclic and cyclic substrates, bearing either an exocyclic or an endocyclic double bond. The procedure worked with a wide range of substrates and tolerated a number of functional and protecting groups. Moreover, the target cyclic compounds were obtained as single cis diastereomers on a multigram scale. The title compounds are promising building blocks for drug discovery that can be used to obtain sp ³-enriched β-fluoro and α,β-unsaturated sulfonamides. In the experiment, the researchers used many compounds, for example, Ethyl 4-methylenecyclohexanecarboxylate (cas: 145576-28-9Application of 145576-28-9).

Ethyl 4-methylenecyclohexanecarboxylate (cas: 145576-28-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Application of 145576-28-9

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

Larvicidal Activity of Essential Oils of Five Apiaceae Taxa and Some of Their Main Constituents Against Culex quinquefasciatus was written by Pavela, Roman;Maggi, Filippo;Cianfaglione, Kevin;Bruno, Maurizio;Benelli, Giovanni. And the article was included in Chemistry & Biodiversity in 2018.Application of 659-70-1 This article mentions the following:

Apiaceae are aromatic herbs producing essential oils which are used on an industrial scale for various purposes. Notably, Apiaceae essential oils may replace synthetic insecticides keeping most of their efficacy and avoiding environmental pollution and human poisoning. In the present work, we explored the insecticidal potential of the essential oils from five Apiaceae taxa, namely Sison amomum, Echinophora spinosa, Heracleum sphondylium subsp. sphondylium, Heracleum sphondylium subsp. ternatum, and Trachyspermum ammi, as well as their major constituents (sabinene, p-cymene, terpinolene, myristicin, and thymol), against the filariasis vector Culex quinquefasciatus. For the purpose, the essential oils were obtained by hydrodistillation and their composition was achieved by gas chromatog./mass spectrometry (GC/MS). Their acute toxicity on third instar larvae of C. quinquefasciatus was determined The two most active essential oils were those from T. ammi fruits and E. spinosa roots, showing LC₅₀ below 20 μl/l and LD₉₀ below 50 μl/l. These oils were dominated by the monoterpene phenol thymol and the phenylpropanoid myristicin, resp., which showed the strongest larvicidal activity (LC₅₀ of 15.1 and 16.3 μl/l, resp.) among the pure compounds tested. These results showed that Apiaceae may be useful as source of larvicidal compounds to be used for the development of cheap, effective and eco-friendly insecticidal formulations. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Application of 659-70-1).

Isopentyl 3-methylbutanoate (cas: 659-70-1) 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. 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.Application of 659-70-1

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

Characterization of the key aroma-active compounds in Yongchuan douchi (fermented soybean) by application of the sensomics approach was written by Wang, Shuqi;Chang, Yuan;Liu, Bing;Chen, Haitao;Sun, Baoguo;Zhang, Ning. And the article was included in Molecules in 2021.Application In Synthesis of 5-Ethyldihydrofuran-2(3H)-one This article mentions the following:

Yongchuan douchi is a traditional fermented soya bean product which is popular in Chinese dishes due to its unique flavor. In this study, the key aroma-active compounds of Yongchuan douchi were characterized by the combined gas chromatog.-olfactometry (GC-O) and gas chromatog.-mass spectrometry (GC-MS) with sensory evaluation. In total, 49 aroma compounds were sniffed and identified, and 20 of them with high flavor dilution factors (FD) and odor activity values (OAVs) greater than one were screened by applied aroma extract dilution anal. (AEDA) and quantitated anal. Finally, aroma recombination and omission experiments were performed and 10 aroma-active compounds were thought to have contributed significantly including 2,3-butanedione (butter, cheese), di-Me trisulfide (garlic-like), acetic acid (pungent sour), acetylpyrazine (popcorn-like), 3-methylvaleric acid (sweaty), 4-methylvaleric acid (sweaty), 2-mehoxyphenol (smoky), maltol (caramel), γ-nonanolactone (coconut-like), eugenol (woody) and phenylacetic acid (flora). In addition, sensory evaluation showed that the flavor profile of Yongchuan douchi mainly consisted of sauce-like, sour, nutty, smoky, caramel and fruity notes. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Application In Synthesis of 5-Ethyldihydrofuran-2(3H)-one).

5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) 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. 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. Application In Synthesis of 5-Ethyldihydrofuran-2(3H)-one

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

Gas chromatographic enantiomer separation of mandelates and its analogs on permethylated cyclodextrin chiral stationary phases was written by Nie, Mengyan;Zhou, Liangmo;Wang, Qinghai;Zhu, Taoqian. And the article was included in Fenxi Huaxue in 2000.Name: Ethyl 2-hydroxy-3-phenylpropanoate This article mentions the following:

Gas chromatog. enantiomer separation of mandelates and its analogs was studied on permethylated β-cyclodextrin (PMBCD) and permethylated γ-cyclodextrin (PMGCD) chiral stationary phases (CSPs). The compounds studied included Me and Et mandelates, Me and Et α-methoxymandelates, Me and Et 3-phenylacetates, Et 2-hydroxy-4-Ph butyrate. All the compounds studied can be chirally separated to baseline on PMBCD CSPs, but no enantiomer separation was observed on PMGCD CSPs for all the tested compounds Some thermodn. data were evaluated for the mechanism of chiral recognition between permethylated cyclodextrins and mandelates and their analogs. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Name: Ethyl 2-hydroxy-3-phenylpropanoate).

Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0) 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.Name: Ethyl 2-hydroxy-3-phenylpropanoate

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

The Synthesis of a Terminally Linked Homodimeric Bisdistamycin Analog was written by Al-Said, Naim H.. And the article was included in Monatshefte fuer Chemie in 2006.Synthetic Route of C7H8N2O4 This article mentions the following:

A practical synthetic route to a terminally linked homodimeric bisdistamycin analog is described. In this analog the two strands of tricarboxamides of the pyrrole-pyrrole-pyrrole array are tethered from the nitrogen atom of the terminal pyrrole by a bis(ethoxyethane)chain. In the experiment, the researchers used many compounds, for example, Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7Synthetic Route of C7H8N2O4).

Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7) 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. 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 C7H8N2O4

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

Rhodium(I)-Catalyzed Coupling-Cyclization of C=O Bonds with α-Diazoketones was written by Chen, Ziyang;Hu, Xinwei;Huang, Junmin;Zeng, Wei. And the article was included in Organic Letters in 2018.COA of Formula: C9H10O3S This article mentions the following:

An unprecedented intermol. nucleophilic attack of C=X bonds (X = O and S) on the rhodium(I)-carbenes has been developed. This transformation allows for the coupling-cyclization of aroylamides with α-diazoketones and provides concise access to 2,4,5-trisubstituted 1,3-oxazoles, e.g., I, and 1,3-thiazoles, e.g., II, with a broad tolerance of functional groups. 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 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. 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

A high-resolution Orbitrap Mass spectral library for trace volatile compounds in fruit wines was written by Liu, Yaran;Li, Na;Li, Xiaoyao;Qian, Wenchao;Liu, Jiani;Su, Qingyu;Chen, Yixin;Zhang, Bolin;Zhu, Baoqing;Cheng, Jinxin. And the article was included in Scientific Data in 2022.Electric Literature of C10H18O2 This article mentions the following:

The overall aroma is an important factor of the sensory quality of fruit wines, which attributed to hundreds of volatile compounds However, the qual. determination of trace volatile compounds is considered to be very challenging work. GC-Orbitrap-MS with high resolution and high sensitivity provided more possibilities for the determination of volatile compounds, but without the high-resolution mass spectral library. For accuracy of qual. determination in fruit wines by GC-Orbitrap-MS, a high-resolution mass spectral library, including 76 volatile compounds, was developed in this study. Not only the HRMS spectrum but also the exact ion fragment, relative abundance, retention indexes (RI), CAS number, chem. structure diagram, aroma description and aroma threshold (ortho-nasally) were provided and were shown in a database website (Food Flavor Laboratory, http://foodflavorlab.cn/). HRMS library was used to successfully identify the volatile compounds mentioned above in 16 fruit wines (5 blueberry wines, 6 goji berry wines and 5 hawthorn wines). The library was developed as an important basis for further understanding of trace volatile compounds in fruit wines. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Electric Literature of C10H18O2).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) 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. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Electric Literature of C10H18O2

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