Month: January 2023

Synthesis of adamantane derivatives with potential antiviral activity was written by Arya, V. P.;Fernandes, F.;Ghate, S. P.;Costa-Pereira, F. X. R.;Wasaiwalla, Y. H.. And the article was included in Indian Journal of Chemistry in 1972.Electric Literature of C8H6FNS This article mentions the following:

Adamantane derivatives (I; R = e.g., NHEt, NHSO2NMe2, NHCH2(NH2)C:NOH, NHCSNHR1, R1 = e.g., allyl, CMe3, CH2C6H4F-p; CONH(CH2)3R2, R2 = e.g., piperidino, morpholino, 4-methyl-1-piperazinyl) were prepared by treating I (R = NH2) with isothiocyanates, isocyanates and Me2NSO2NHCl. Some 1-(alkylamino)adamantanes and substituted adamantane-1-carboxamides were also prepared Antiviral activity of these compounds against influenza PR3 virus was described. In the experiment, the researchers used many compounds, for example, 4-Fluorobenzylisothiocyanate (cas: 2740-88-7Electric Literature of C8H6FNS).

4-Fluorobenzylisothiocyanate (cas: 2740-88-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Electric Literature of C8H6FNS

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

Certified Reference Material for the Quantification of Phthalates in Polyvinyl Chloride Resin (NMIJ CRM 8152) was written by Hanari, Nobuyasu;Orihara, Yukari;Matsuyama, Shigetomo. And the article was included in Analytical Letters in 2021.Formula: C20H26O4 This article mentions the following:

Phthalates are primary industrial chems. used as polyvinyl chloride (PVC) plasticizers. However, certain phthalates are controlled as restricted substances listed under Annex II of Directive 2011/65/EU, (EU)2015/863. Since an accurate quantification of phthalates is essential to monitoring their concentration levels, quality assurance during their analyses using certified reference materials (CRMs) is required. A PVC CRM for the quantification of phthalates (NMIJ CRM 8152) was provided by the National Metrol. Institute of Japan. This CRM was in the form of grayish-white pellets (3-mm diameter x 3-mm length). The anal. procedures adopted were isotope-dilution mass spectrometry, which was the primary method of measurement, and gas chromatog./mass spectrometry; these procedures were optimized and applied to the characterization. The mass fractions of five target phthalates calculated using the mean values were determined as the certified values of the CRM. The relative standard uncertainties attributed to the certification were combined, e.g., those for the characterization, inhomogeneity, and instability. The mass fractions of five phthalates were certified, and those of three phthalates and one adipate were acquired and are reported as tech. information. The CRM is shown to be applicable to assessing the validity of anal. methods during the quantification of phthalates in PVC resin and similar materials. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Formula: C20H26O4).

Dicyclohexyl phthalate (cas: 84-61-7) 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. 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.Formula: C20H26O4

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

Synthesis and Antileukemia Activity Evaluation of Benzophenanthridine Alkaloid Derivatives was written by Tang, Yaling;Xu, Xinglian;Li, Jiang;Deng, Lulu;Mu, Shuzhen. And the article was included in Molecules in 2022.Reference of 1190-39-2 This article mentions the following:

Thirty_–three benzophenanthridine alkaloid derivatives (1a_–1u and 2a_–2l) were synthesized, and their cytotoxic activities against two leukemia cell lines (Jurkat Clone E6_–1 and THP_–1) were evaluated in vitro using a Cell Counting Kit_–8 (CCK_–8) assay. Nine of these derivatives (1i_–l, 2a, and 2i_–l) with IC₅₀ values in the range of 0.18_–7.94 μM showed significant inhibitory effects on the proliferation of both cancer cell lines. Anal. of the primary structure_–activity relationships revealed that different substituent groups at the C_–6 position might have an effect on the antileukemia activity of the corresponding compounds In addition, the groups at the C_–7 and C_–8 positions could influence the antileukemia activity. Among these compounds, 2j showed the strongest in vitro antiproliferative activity against Jurkat Clone E6_–1 and THP_–1 cells with good IC50 values (0.52 ± 0.03 μM and 0.48 ± 0.03 μM, resp.), slightly induced apoptosis, and arrested the cell-cycle, all of which suggests that compound 2j may represent a potentially useful start point to undergo further optimization toward a lead compound In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Reference of 1190-39-2).

malonic acid dibutyl ester (cas: 1190-39-2) 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. 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.Reference of 1190-39-2

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

Effects of different exaction methods on constituents of volatile oil from Idesia polycarpa maxim was written by Ye, Yang;Wang, Xiao-meng;Bu, Gui-xian;Xiao, Ping;Chen, Fang;Tang, Lin. And the article was included in Sichuan Daxue Xuebao, Ziran Kexueban in 2013.Related Products of 106-79-6 This article mentions the following:

The volatile oils of Idesia polycarpa Maxim fruits were extracted by different methods such as steam distillation, ultrasonic and Soxhlet extraction The chem. compounds were separated and identified by capillary GC-MS method. The relative content of each component was calculated by area normalization. 64, 50 And 57 volatile components as listed in Table 1 were identified, and 38 components were owned by all. The main components are linoleic acid, palmitic acid, oleic acid, squalene, γ-nonalactone and γ-Tocopherol etc. The components extracted by steam distillation were much more compared with other methods, while the extract rate by Soxhlet extraction was the highest. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Related Products of 106-79-6).

Dimethyl decanedioate (cas: 106-79-6) 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.Related Products of 106-79-6

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

Optically active γ-hydroxy sulfone Julia reagents for the synthesis of peptidyl olefin peptidomimetics was written by Mirilashvili, Sima;Chasid-Rubinstein, Naama;Albeck, Amnon. And the article was included in European Journal of Organic Chemistry in 2008.Recommanded Product: 10203-58-4 This article mentions the following:

Peptidyl olefin peptidomimetics serve as biol. active compounds or as intermediates for other peptidyl isosteres. We developed a chemoenzymic stereoselective approach to optically active γ-hydroxy sulfones to be assembled into peptidyl olefins by the Julia reaction. Key enzymic hydrolysis of prochiral diesters to the corresponding hydroxy esters introduces optical activity. The sequence of the subsequent chem. reactions, either protection-hydrolysis-functionalization or functionalization-hydrolysis-protection, determines the absolute stereochem. of the final sulfone building block. In the experiment, the researchers used many compounds, for example, Diethyl isobutylmalonate (cas: 10203-58-4Recommanded Product: 10203-58-4).

Diethyl isobutylmalonate (cas: 10203-58-4) 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.Recommanded Product: 10203-58-4

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

Occurrence, spatial distribution and risk assessment of high concern endocrine-disrupting chemicals in Jiangsu Province, China was written by Fan, Deling;Yin, Wei;Gu, Wen;Liu, Mingqing;Liu, Jining;Wang, Zhen;Shi, Lili. And the article was included in Chemosphere in 2021.Safety of Dicyclohexyl phthalate This article mentions the following:

Endocrine-disrupting chems. (EDCs) have attracted much concern because of the environmental and health risks they pose. Here we used liquid chromatog. coupled with quadrupole-Orbitrap high-resolution mass spectrometry to quantify 10 types of EDCs at 118 sampling sites in Jiangsu Province, China, and then evaluated their resp. environmental risk using a conservative risk quotient method. The results show that, in surface water, the targeted nonylphenol (NP), 4-tert-octylphenol (4-t-OP), and (2-ethylhexyl)phthalate (DEHP) were ranked highest, having mean concentrations above 300 ng/L. In comparison, both 4-t-OP and DEHP were also ranked highest, with mean concentrations above 100 ng/g, in the sediment samples. Moreover, the âˆ?sub>10EDCs concentration in the Huai River Basin was similar to that in the Yangtze River Basin. Notably, Huai’an city had the maximum mean concentration for EDCs in the Huai River Basin, followed by Xuzhou city and Suqian city, while Yangzhou city ranked highest in the Yangtze River Basin. Furthermore, the corresponding risk distribution revealed that (1) NP, bisphenol A (BPA), and 4-t-OP are of medium to high risk in 70%, 100% and 95% of the surface water samples, and likewise in 45%, 88% and 100% of the sediment samples, resp.; the maximum RQ value for NP in surface water samples reached 74.9; (2) DEHP belongs to the high-risk category in all samples (100%), whose maximum RQ reached 54.7. To our best knowledge, this is the first study to report on the occurrence, spatial distribution, and risk assessment of EDCs of high concern in Jiangsu Province, China. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Safety of Dicyclohexyl phthalate).

Dicyclohexyl phthalate (cas: 84-61-7) 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.Safety of Dicyclohexyl phthalate

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

Interaction studies of volatiles from jackfruit on α-phosphorene nanosheet-a DFT outlook was written by Nagarajan, V.;Bhavadharani, R. Keerthi;Chandiramouli, R.. And the article was included in Structural Chemistry in 2020.Quality Control of Isopentyl 3-methylbutanoate This article mentions the following:

The present report brings out the interaction between the black phosphorene nanosheet and volatile organic compounds (VOCs) originating from jackfruit using the first-principles calculation Using the cohesive formation energy, the stable nature of the phosphorene nanosheet is confirmed. The energy band structure provides the insights on the electronic properties of phosphorene nanosheet and the energy gap is detected to be 0.59 eV, showing semiconductor nature. Besides, present results reveal the interaction of VOC compounds emitted from jackfruit (during various ripening stages). The adsorption of VOCs on phosphorene nanosheet is in the following order isopentyl isovalerate > Bu isovalerate > isopentyl acetate > Bu acetate. The adsorption energy including energy gap, Bader charge transfer, and average energy gap variation clearly signifies the adsorption property of VOC compounds from jackfruit on phosphorene nanosheet, which serves as the fingerprint to estimate the jackfruit freshness. Also, by using energy band structure, electron d., and d. of states (DOS) maps, the adsorption property of VOC compounds have been explored. The result suggests that phosphorene sheets can be used as a sensing material to estimate the quality of jackfruit. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Quality Control of Isopentyl 3-methylbutanoate).

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

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

Synthesis and Hierarchical Self-Assembly of Diphenylalanine-Based Homopolymer and Copolymers By RAFT Polymerization was written by Yonenuma, Ryo;Ishizuki, Ai;Nakabayashi, Kazuhiro;Mori, Hideharu. And the article was included in Journal of Polymer Science, Part A: Polymer Chemistry in 2019.Application In Synthesis of Benzyl benzodithioate This article mentions the following:

Dipeptide diphenylalanine has attracted significant research interests because of its ability to self-assemble into various nanostructures such as nanotubes, nanowires, and nanoribbons. In this article, we present the synthesis and self-assembly of a novel diphenylalanine-based homopolymer and block/random copolymers by the reversible addition-fragmentation chain transfer (RAFT) polymerization of an acrylamide having a dipeptide moiety. The RAFT polymerization of N-acryloyl-L,L-diphenylalanine (A-Phe-Phe-OH) afforded novel amino acid-based polymers with predetermined mol. weights and relatively narrow-mol. weight distributions. The hierarchical self-assembled structures of poly(A-Phe-Phe-OH), which involve nanorods, larger nanofiber-like microcrystals, and fiber bundles, were characterized by at. force microscopy (AFM), transmission electron microscopy, SEM, and dynamic light scattering measurements. The circular dichroic measurements of poly(A-Phe-Phe-OH) revealed its characteristic chiroptical property, which is affected by the nature of the solvents and the addition of urea and salts via hydrophobic, hydrogen bonding, and electrostatic interactions. Thermo- and pH-responsive block and random copolymers composed of A-Phe-Phe-OH and N-isopropylacrylamide were synthesized by RAFT polymerization, and the thermoresponsive properties and assembled structures of the resulting copolymers were investigated by AFM and turbidity measurements. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Application In Synthesis of Benzyl benzodithioate).

Benzyl benzodithioate (cas: 27249-90-7) 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 In Synthesis of Benzyl benzodithioate

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

Comprehensive investigation of lactones and furanones in icewines and dry wines using gas chromatography-triple quadrupole mass spectrometry was written by Qian, Xu;Lan, Yibin;Han, Shen;Liang, Nana;Zhu, Baoqing;Shi, Ying;Duan, Changqing. And the article was included in Food Research International in 2020.Computed Properties of C10H18O2 This article mentions the following:

A number of lactones and furanones associated with pleasant odorants play a vital role in grape and wine aroma profiles. However, they are usually present at trace levels and are particularly challenging to measure. In this work, an optimized method based on solid-phase extraction (SPE) coupled with gas chromatog.-triple quadrupole mass spectrometry (GC-QqQ-MS/MS) was developed for simultaneous determination of 14 lactones and 3 furanones. The validation was carried out using different types of wine as matrixes, and satisfactory linearity, sensitivity, trueness and precision were confirmed. Furaneol and sotolon showed significantly lower limits of detection (LODs) in three real wines compared to model wine due to the matrix effect. Furthermore, the method was successfully applied to investigate the concentration range of lactones and furanones in several icewines, dry red and white wines. Icewines contained higher concentrations of most lactones and furanones compared with dry red and white wines. Partial least squares-discriminate anal. (PLS-DA) also indicated that γ-hexa-, γ-octa-, γ-nona-, γ-deca-, δ-hexa-, and δ-decalactone, as well as 5,6-dihydro-6-pentyl-2H-pyran-2-one (C10 massoia lactone), sotolon and homofuraneol contributed greatly to the discrimination between icewines and dry wines. Moreover, the calculation of odor activity value (OAV) suggested that γ-octa-, γ-nona-, and γ-decalactone, as well as furaneol and homofuraneol contributed greatest to the aroma of icewines. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Computed Properties of C10H18O2).

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. 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.Computed Properties of C10H18O2

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

Coinage Metals-Catalyzed Cascade Reactions of Aryl Alkynylaziridines: Silver(I)-Single vs Gold(I)-Double Cyclizations was written by Kern, Nicolas;Blanc, Aurelien;Miaskiewicz, Solene;Robinette, Michelle;Weibel, Jean-Marc;Pale, Patrick. And the article was included in Journal of Organic Chemistry in 2012.Product Details of 17920-23-9 This article mentions the following:

Alkynylaziridines carrying an aryl group could be efficiently converted into aminoallenylidene isochromans, isoquinolines, or tetrahydronaphtalenes with silver(I) salts and into 1-azaspiro[4.5]decane derivatives with gold(I) complexes. Mechanistic investigations revealed that both Ag- and Au-catalyzed reactions involved a Friedel-Crafts type intramol. reaction leading to an allene and that Au also rapidly promoted a second intramol. cyclization of the aminoallene intermediate to the corresponding spiro derivative Stereochem. investigations suggested an anti-SN₂‘-type pathway for the first cyclization leading to a stereodefined allene, which could then be cyclized to the corresponding stereodefined spiro product. These results highlight the duality between oxo- or azaphilicity and alkynophilicity of Ag and Au as well as their complementarity in terms of reactivity. In the experiment, the researchers used many compounds, for example, Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9Product Details of 17920-23-9).

Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9) 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. 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.Product Details of 17920-23-9

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