Tag: 100-200

On October 31, 2006, Sbardella, Gianluca; Bartolini, Sara; Castellano, Sabrina; Artico, Marino; Paesano, Nicola; Rotili, Dante; Spadafora, Corrado; Mai, Antonello published an article.SDS of cas: 872046-08-7 The title of the article was 6-alkylthio-4-[1-(2,6-difluorophenyl)alkyl]-1H-[1,3,5]triazin-2-ones (ADATs): novel regulators of cell differentiation and proliferation. And the article contained the following:

Novel triazine analogs of 5-alkyl-2-alkylthio-6-[1-(2,6-difluorophenyl)alkyl]-3,4-dihydropyrimidin-4(3H)-ones (F2-DABOs), previously described by us as nonnucleoside HIV-1 reverse transcriptase inhibitors (NNRTIs), were tested for their antiproliferative and cytodifferentiating activity on the A-375 human melanoma cell line. Most of the tested derivatives were effective in decreasing cell proliferation, facilitating morphol. differentiation, and reprogramming gene expression. All these effects were reversible upon withdrawal of RT inhibitors. Among the compounds tested, 3f (I) showed the highest antiproliferative effect, whereas compound 6c, although not affecting cell proliferation, is endowed with a strong cytodifferentiating effect, which is probably related to a marked upregulation of the e-cad gene. These results support the potential of NNRTIs as valuable antitumor agents. The experimental process involved the reaction of Methyl 2-(2,6-difluorophenyl)acetate(cas: 872046-08-7).SDS of cas: 872046-08-7

The Article related to antitumor triazinone preparation sar, Pharmacology: Structure-Activity and other aspects.SDS of cas: 872046-08-7

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

Sarkar, Vikramjit; Mukhopadhyay, Balaram published an article in 2016, the title of the article was Synthesis of the Pentasaccharide Repeating Unit Related to the Exopolysaccharide from Lactobacillus plantarum C88 in the Form of its 2-Aminoethyl Glycoside.Electric Literature of 707-07-3 And the article contains the following content:

Chem. synthesis of the pentasaccharide, β-D-Galp-(1â†?)-α-D-Galp-3-O-(β-D-Glcp)-(1â†?)-α-D-Glcp-(1â†?)-β-D-Glcp, is reported by following a convenient [2+2+1] strategy. Two disaccharides α-D-Galp-(1â†?)-β-D-Glcp and α-D-Galp-(1â†?)-β-D-Galp were synthesized from com. available monosaccharides through rational protecting group manipulations and coupled to make a tetrasaccharide. The last Glc unit was coupled with the tetrasaccharide to furnish the target pentasaccharide. Stereoselective glycosylation was achieved by the activation of thioglycosides using N-iodosuccinimide and H2SO4-silica or activation of trichloroacetimidate using H2SO4-silica alone. Finally, global deprotection furnished the target mol. The target pentasaccharide has been synthesized in the form of its 2-aminoethyl glycoside to facilitate further glycoconjugate formation using the terminal free amine. The experimental process involved the reaction of (Trimethoxymethyl)benzene(cas: 707-07-3).Electric Literature of 707-07-3

The Article related to aminoethyl glycoside glycoconjugate stereoselective glycosylation, oligosaccharide preparation repeating unit exopolysaccharide lactobacillus plantarum protecting group, Carbohydrates: Oligosaccharides and other aspects.Electric Literature of 707-07-3

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

On August 31, 2022, Vyviurska, Olga; Thai, Ha Anh; Garancovska, Dominika; Gomes, Adriano A.; Spanik, Ivan published an article.Formula: C8H14O4 The title of the article was Enhanced multi-stir bar sorptive extraction for wine analysis: Alteration in headspace mode. And the article contained the following:

Multi-stir bar sorptive extraction (multi-SBSE) represents a viable alternative for recent trends in sample preparation based on a combination of extraction techniques. In this case, increased amount of sorbent and its extended polarity range could advance quality of exptl. data obtained in foodomics or metabolomics investigations. With this in mind, it was developed multi-SBSE procedure suitable for authentication of botrytized wine produced in different countries of Tokaj wine region. A design of headspace mode of multi-SBSE was modified to provide addnl. agitation of a stir bar. An expanded profile of wine samples was obtained with the application of EG-Silicone and PDMS coated stir bars in headspace and direction immersion mode, resp. Multivariate optimization based on central composite design was selected to determine the influence of various exptl. parameters, including extraction temperature enhancing headspace extraction In our case, proper description of the optimization results required application of a third-order polynomial model, which highlighted dominant influence of salt addition for extraction in both modes. Due to a large number of extracted compounds, comprehensive two-dimensional gas chromatog. (GC x GC) was used for assessment of wine samples. Such approach allows reveleaing the presence of sulfur containing compounds, diols, ketone derivatives and methoxybenzenes linking a specific geog. origin. At the same time, the results obtained for compounds common for all the samples were processed with principal component anal. (PCA). Considerable progress for discrimination of the botrytized wines was mainly achieved with combined data from EG-Silicone and PDMS extraction The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).Formula: C8H14O4

The Article related to wine multi stir bar sorptive extraction, botrytized wines, comprehensive two-dimensional gas chromatography, multi-sbse, tokaj wine region, Food and Feed Chemistry: Analysis and other aspects.Formula: C8H14O4

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

On June 21, 2017, Lytra, Georgia; Franc, Celine; Cameleyre, Margaux; Barbe, Jean-Christophe published an article.Category: esters-buliding-blocks The title of the article was Study of Substituted Ester Formation in Red Wine by the Development of a New Method for Quantitative Determination and Enantiomeric Separation of Their Corresponding Acids. And the article contained the following:

A new method was developed for quantifying substituted acids including, where applicable, their various unexplored enantiomeric forms. A new step was added to acids’ usual quantification methods, consisting of extraction, derivatization to Me esters, and gas chromatog. anal.: preliminary extraction was performed at basic pH to eliminate Et esters, thus avoiding their transesterification during derivatization. Quantitation and enantiomeric distribution of some substituted esters and their corresponding acids were established in 31 com. Bordeaux red wines from 0 to 20 years old. A strong pos. correlation was observed between the age of wine and levels of Et 2-methylpropanoate, Et 3-methylbutanoate, Et 2-methylbutanoate, Et (3R)-3-hydroxybutanoate, both enantiomeric forms of Et 2-hydroxy-3-methylbutanoate, and Et (2S)-2-hydroxy-4-methylpentanoate, but not Et (3S)-3-hydroxybutanoate. However, the standard deviations of average concentrations for the corresponding substituted acids were so large that only few correlations between concentrations and age were observed Concentrations of (2S)-2-hydroxy-3-methylbutanoic acid and (2S)-2-hydroxy-4-methylpentanoic acid increased slightly over time, while (2R)-2-hydroxy-4-methylpentanoic acid levels decreased slightly with the age. Variations in the ratio of substituted Et esters to their corresponding acids over time detected thanks to these anal. advances suggested that, in general, acids were continuously esterified during aging. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Category: esters-buliding-blocks

The Article related to alkyl acid ester enantiomer red wine extraction gc, chiral substituted acids, chiral substituted esters, enantiomeric distribution, Food and Feed Chemistry: Analysis and other aspects.Category: esters-buliding-blocks

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

On September 22, 1976, Miki, Tosaku; Ineoka, Mari; Isoda, Yoshiro; Okano, Junji published a patent.COA of Formula: C9H14O3 The title of the patent was Active amino acid. And the patent contained the following:

The methylcyclohexanecarboxylic acids I (R = 1-, 2-, or 3-Me), prepared in 5 steps from the oxo esters II (R1 = Me, Et) via treatment with HOCMe2CN, dehydration, hydrogenation, hydrolysis, and reduction, were isomerized on treating with p-MeC6H4SO3H (III) followed by a weakly basic ion exchange resin. Thus, treating a mixture of cis- and trans-I (R = 1-Me) with III in H2O 1 h at room temperature gave cis-I (R = Me).4-MeC6H4SO3H which was eluted through Amberlite IR-45 (OH form) to give cis-I (R = Me). The experimental process involved the reaction of Methyl 1-methyl-4-oxocyclohexanecarboxylate(cas: 37480-41-4).COA of Formula: C9H14O3

The Article related to methylcyclohexanecarboxylic acid isomerization, aminomethylcyclohexanecarboxylic acid, cyclohexanecarboxylic acid aminomethyl, Alicyclic Compounds: Cyclohexanes and other aspects.COA of Formula: C9H14O3

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

Wang, Jianwu; Hang, Yuanxin; Yan, Tingting; Liang, Jiahui; Huang, Zhiqiang; Xu, Huilan published an article in 2018, the title of the article was Qualitative analysis of flavors and fragrances added to tea by using GC-MS.Electric Literature of 85-91-6 And the article contains the following content:

A precise identification method was developed to identify the flavors and fragrances added to tea matrix artificially using gas chromatog. with mass spectrometry and gas chromatog. with quadrupole time-of-flight mass spectrometry. The proposed method was based on the corresponding “three-column retention indexes, two exact mass numbers, one mass spectrum matching degree” database of 40 kinds of common flavors and fragrances. The intraday and the interday relative standard deviation of the retention indexes were less than 0.048 and 0.093%, resp. The accuracy of exact mass was between 0.15 and 6.22 ppm. And the validation of the created database was performed by analyzing the tea samples. Thus, the proposed method is suitable for the precise identification of the flavors and fragrances added to tea matrix artificially without standard substances as a reference The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Electric Literature of 85-91-6

The Article related to flavoring fragrance additive tea gc ms, accurate mass, flavors and fragrances, retention index, standard mass spectrum, tea, Food and Feed Chemistry: Analysis and other aspects.Electric Literature of 85-91-6

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

On July 15, 2019, Zhou, Han-Chen; Hou, Zhi-Wei; Wang, De-Xing; Ning, Jing-Ming; Wei, Shu published an article.Formula: C9H11NO2 The title of the article was Large scale preparation, stress analysis, and storage of headspace volatile condensates from Jasminum sambac flowers. And the article contained the following:

In this study, a large-scale preparation of jasmine floral volatile condensate (FVC) was conducted using fresh flowers without any extraction solvent involvement. Condensate volatile profiles were compared to those of fresh flowers for their scent characteristics and ability to withstand manufacturing and storage. The FVC possessed a typical jasmine flower scent, a similar odor polygon shape and greatly enhanced odor intensity and character odorants linalool, indole, and Me anthranilate. In late August and Sept. in Fuzhou, China, the ratio of odor activity values for indole/linalool in FVCs was close to that of fresh flowers, indicating that these were suitable local harvest times for FVC preparation Room temperature storage for 30 mo dramatically reduced the abundance of potent odorants and FVC scent intensity, while cold temperature (4 °C) storage was able to maintain FVC clarity and scent intensity. Our findings should be helpful at improving FVC quantity, quality, and storage. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Formula: C9H11NO2

The Article related to jasminum volatile, floral volatile condensates, jasminum sambac, odor activity value: spme, storage, volatile compounds, Food and Feed Chemistry: Analysis and other aspects.Formula: C9H11NO2

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

Chen, Zhi-Min; Liu, Jianbo; Guo, Jing-Yao; Loch, Maximillan; DeLuca, Ryan J.; Sigman, Matthew S. published an article in 2019, the title of the article was Palladium-catalyzed enantioselective alkenylation of alkenylbenzene derivatives.Product Details of 10472-24-9 And the article contains the following content:

A regioselective and enantioselective palladium-catalyzed relay Heck alkenylation of alkenylbenzene derivatives to construct remote stereocenters was disclosed. Various β-substituted styrenes were readily obtained in moderate yields with good to excellent levels of enantioselectivity. This strategy provided rapid access to enantioenriched δ, ε, ζ and η-alkenyl aryl compounds from simple starting materials. Mechanistic studies suggested that termination of the relay reaction was controlled by affinity of the arene for the Pd complex during migration. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Product Details of 10472-24-9

The Article related to alkenylarene alkenyl triflate palladium catalyst regioselective enantioselective heck reaction, Alicyclic Compounds: Cyclohexanes and other aspects.Product Details of 10472-24-9

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

On January 31, 2020, Karimali, Despina; Kosma, Ioanna; Badeka, Anastasia published an article.Product Details of 123-25-1 The title of the article was Varietal classification of red wine samples from four native Greek grape varieties based on volatile compound analysis, color parameters and phenolic composition. And the article contained the following:

Four Greek monovarietal red wines, Agiorgitiko of Nemea, Xinomavro of Naousa, Mavrotragano of Santorini and Fociano of Ikaria, were characterized and classified in terms of volatile and phenolic composition Total phenolic content (TPC) and color parameters were also studied. Forty-four volatile compounds were identified and semi-quantified by head space-solid phase microextraction-gas chromatog./mass spectrometry (HS-SPME-GC/MS) and five phenolic compounds were analyzed using high-performance liquid chromatog. (HPLC-DAD). Concerning the total volatile fraction, Xinomavro showed the highest amount as it was particularly rich in alcs., esters and hydrocarbons, while in the other three wine varieties ranged at lower concentrations Furthermore, Xinomavro and Mavrotragano recorded the highest phenolic content, whereas Fociano recorded the lowest concentrations in both TPC and individual phenolic components. As far as classification results are concerned, the application of statistical anal. (multivariate anal. of variance/linear discriminant anal.-MANOVA/LDA), on volatile compounds resulted in a rather high classification rate (87.5%). Finally, the resp. rates for color and TPC phenolics were also quite satisfactory (75% and 62.5%, resp.). The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).Product Details of 123-25-1

The Article related to grape red wine classification volatile compound color phenolic composition, Food and Feed Chemistry: Analysis and other aspects.Product Details of 123-25-1

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

On February 15, 2022, Cody, Robert B.; Fukudome, Takao; Ubukata, Masaaki published an article.Application of 123-25-1 The title of the article was Integrated data analysis making use of the total information from gas chromatography and high-resolution time-of-flight mass spectrometry to identify qualitative differences between two whisky samples. And the article contained the following:

Anal. of complex mixtures with gas chromatog. coupled with high-resolution time-of-flight mass spectrometry (GC/HRTOFMS) can produce a large amount of data. A new software program was recently reported that integrates all of the available mass spectrometric information from GC/HRTOFMS anal. into a concise report. New capabilities have now been added to the software to incorporate retention index data and to identify differences between two samples. Two Scotch whisky samples were sampled by solid-phase microextraction (SPME) and analyzed by GC/HRTOFMS. One of the two whisky samples (Sample B) was identical to the other sample (Sample A) except for an addnl. 6-mo storage in sherry casks. Both electron ionization (EI) and chem. ionization (CI) data were obtained using a new GC/TOFMS system (JEOL AccuTOF GC-Alpha) with enhanced resolving power and mass accuracy. Statistical anal. of replicate measurements of the whisky samples was carried out with a new software program (msFineAnal. version 3.2) to identify and assign differences between the samples. There were 124 peaks detected in the two whiskies. Thirteen compounds were detected with a relative peak area greater than 0.05% that were present in greater amounts in the whisky that had been stored in sherry casks for an addnl. 6 mo. Ten of these compounds were identified by the software with high confidence, two were identified as isomers with close retention indexes, and one was identified interactively. The software identified small differences between the two samples that resulted from sherry cask aging. Because all of the information available from the hard and soft ionization analyses for each compound is summarized in a concise integrated report, the operator can rapidly determine the level of confidence for each assignment and inspect the information for compounds that are not present in the database. The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).Application of 123-25-1

The Article related to whisky ethyl hexadecanoate phenyl decanoate software gas chromatog hrtofms, Food and Feed Chemistry: Analysis and other aspects.Application of 123-25-1

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