Tag: 100-200

Li, Chao;Liu, Xiuming;Qin, Yunhua;Wang, Jiajun;Zhang, Chengming;Li, Exian;Xu, Yong;Wu, Yiqin;Jiang, Ciqing published 《Quality trend analysis on cigarette cut filler based on characteristic volatile components in cut filler》. The research results were published in《Yancao Keji》 in 2017.Application of 93-92-5 The article conveys some information:

To investigate the variations in quality trend of cigarette cut fillers, HS-GC/MS was used to determine the contents of 50 volatile characteristic components in cut fillers of cigarettes of different batches and brands. By combining PCA-MD (Principal component anal.-Mahalanobis distance) statistical methods, the determined data were processed to analyze the variation trend of quality of cut filler. The results showed that the cut fillers of cigarettes of five batches of brand C could be classified into five groups. The contents of characteristic components differed greatly between the samples produced in 2015 and 2016. From July to Oct. in 2016, the contents of 50 volatile characteristic components in the cut fillers were basically consistent except that there was slight fluctuation in August, which could be attributed to the tobacco blend adjustment. For the samples produced in 2015, there were large differences in the contents of characteristic components in the cut fillers of brands C and D, indicating that PCA could be used to qual. describe the quality characteristics of the different brands. The MD of cut fillers differed greatly between brands C and D, and the MD of cut filler of brand D was 5 to 10 times as that of brand C, indicating that MD could be used to quant. characterize the quality variation of the cut filler. The research results can be applied to the quality consistency evaluation of the final cigarettes. And 1-Phenylethyl acetate (cas: 93-92-5) was used in the research process.

1-Phenylethyl acetate(cas:93-92-5) is a carboxylic ester. Application 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

HPLC of Formula: 99-36-5《Cerium(III) triflate-catalyzed cycloaddition reaction in aqueous conditions to substituted naphthotriazolediones》 was published in 2022. The authors were Li, Ya-Syuan;Liang, Chien-Fu, and the article was included in《Journal of the Chinese Chemical Society (Weinheim, Germany)》. The author mentioned the following in the article:

In this study, the cerium(III) trifluoromethanesulfonate-catalyzed cycloaddition of 1,4-naphthoquinone with functionalized azides in aqueous solutions was used to synthesize naphtho[2,3-d][1,2,3]triazole-4,9-dione derivatives Moreover, this method boasts scalability and completes the synthesis of two key biol. compounds This method’s advantages are environmentally friendly reaction conditions, easy applicability in large-scale operations, broad structurally diverse products produced in high yields and the recyclability of catalysts. To complete the study, the researchers used Methyl 3-methylbenzoate (cas: 99-36-5) .

Methyl 3-methylbenzoate (cas: 99-36-5) is a common ester. Esters are widespread in nature and are widely used in industry. Several billion kilograms of polyesters are produced industrially annually, important products being polyethylene terephthalate, acrylate esters, and cellulose acetate.HPLC of Formula: 99-36-5

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

Oettl, Sarah K.;Hubert, Jane;Nuzillard, Jean-Marc;Stuppner, Hermann;Renault, Jean-Hugues;Rollinger, Judith M. published 《Dereplication of depsides from the lichen Pseudevernia furfuracea by centrifugal partition chromatography combined to ¹³C nuclear magnetic resonance pattern recognition》 in 2014. The article was appeared in 《Analytica Chimica Acta》. They have made some progress in their research.Computed Properties of C10H12O4 The article mentions the following:

Lichens produce a diversity of secondary metabolites, among them depsides comprised of two or more hydroxybenzoic acid units linked by ester, ether, or C-C-bonds. During classic solid support-based purification processes, depsides are often hydrolyzed and in many cases time, consuming procedures result only in the isolation of decomposition products. In an attempt to avoid extensive purification steps while maintaining metabolite structure integrity, we propose an alternative method to identify the major depsides of a lichen crude extract (Pseudevernia furfuracea var. ceratea (Ach.) D.Hawksw., Parmeliaceae) directly within mixturesExploiting the acidic character of depsides and differences in polarity, the extract was fractionated by centrifugal partition chromatog. in the pH-zone refining mode resulting in twelve simplified mixtures of depsides. After ¹³C NMR anal. of the produced fractions, the major mol. structures were directly identified within the fraction series by using a recently developed pattern recognition method, which combines spectral data alignment and hierarchical clustering anal. The obtained clusters of ¹³C chem. shifts were assigned to their corresponding mol. structures with the help of an inhouse ¹³C NMR chem. shift database, resulting in six unambiguously identified compounds, namely Me β-orcinolcarboxylate (1), atranorin (2), 5-chloroatranorin (3), olivetol carboxylic acid (4), olivetoric acid (5), and olivetonide (6). And Methyl 2,4-dihydroxy-3,6-dimethylbenzoate (cas: 4707-47-5) was used in the research process.

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

Stupak, Michal;Goodall, Ian;Tomaniova, Monika;Pulkrabova, Jana;Hajslova, Jana published 《A novel approach to assess the quality and authenticity of Scotch Whisky based on gas chromatography coupled to high resolution mass spectrometry》 in 2018. The article was appeared in 《Analytica Chimica Acta》. They have made some progress in their research.COA of Formula: C10H12O2 The article mentions the following:

Whisky is one of the most popular spirit drinks in the world. Unfortunately, this highly valued commodity is vulnerable to fraud. To detect fraudulent practices and document quality parameters, a number of laboratory tests based on various principles including chromatog. and spectroscopy have been developed. In most cases, the anal. methods are based on targeted screening strategies. Non-targeted screening (metabolomics fingerprinting) of (semi)volatile substances was used in our study. Following the pre-concentration of these compounds, either by solid phase microextraction (SPME) or by Et acetate extraction, gas chromatog. (GC) coupled to tandem mass spectrometry (Q-TOF mass analyzer) was employed. Unsupervised principal component anal. (PCA) and supervised partial least squares discriminant anal. (PLS-DA) were used for evaluation of data obtained by anal. of a unique set of 171 authentic whisky samples provided by the Scotch Whisky Research Institute. Very good separation of malt whiskies according to the type of cask in which they were matured (bourbon vs. bourbon and wine) was achieved, and significant ‘markers’ for bourbon and wine cask maturation, such as N-(3-methylbutyl) acetamide and 5-oxooxolane-2-carboxylic acid, were identified. Subsequently, the unique sample set was used to construct a statistical model for distinguishing malt and blended whiskies. In the final phase, 20 fake samples were analyzed and the data processed in the same way. Some differences could be observed in the (semi)volatile profiles of authentic and fake samples. Employing the statistical model developed by PLS-DA for this purpose, marker compounds that pos. distinguish fake samples were identified. 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. COA of Formula: C10H12O2 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

Quality Control of Methyl 3-methylbenzoate《Efficient Copper-Catalyzed Multicomponent Synthesis of N-Acyl Amidines via Acyl Nitrenes》 was published in 2019. The authors were van Vliet, Kaj M.;Polak, Lara H.;Siegler, Maxime A.;van der Vlugt, Jarl Ivar;Guerra, Celia Fonseca;de Bruin, Bas, and the article was included in《Journal of the American Chemical Society》. The author mentioned the following in the article:

Direct synthetic routes to amidines are desired, as they are widely present in many biol. active compounds and organometallic complexes. N-Acyl amidines in particular can be used as a starting material for the synthesis of heterocycles and have several other applications. Here, we describe a fast and practical copper-catalyzed three-component reaction of aryl acetylenes, amines, and easily accessible 1,4,2-dioxazol-5-ones to N-acyl amidines, generating CO₂ as the only byproduct. Transformation of the dioxazolones on the Cu catalyst generates acyl nitrenes that rapidly insert into the copper acetylide Cu-C bond rather than undergoing an undesired Curtius rearrangement. For nonaromatic dioxazolones, [Cu(OAc)(Xantphos)] is a superior catalyst for this transformation, leading to full substrate conversion within 10 min. For the direct synthesis of N-benzoyl amidine derivatives from aromatic dioxazolones, [Cu(OAc)(Xantphos)] proved to be inactive, but moderate to good yields were obtained when using simple copper(I) iodide (CuI) as the catalyst. Mechanistic studies revealed the aerobic instability of one of the intermediates at low catalyst loadings, but the reaction could still be performed in air for most substrates when using catalyst loadings of 5 mol %. The herein reported procedure not only provides a new, practical, and direct route to N-acyl amidines but also represents a new type of C-N bond formation. And Methyl 3-methylbenzoate (cas: 99-36-5) was used in the research process.

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.Quality Control 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