Month: January 2023

A novel series of piperazinyl-pyridine ureas as antagonists of the purinergic P2Y₁₂ receptor was written by Bach, Peter;Bostroem, Jonas;Brickmann, Kay;van Giezen, J. J. J.;Hovland, Ragnar;Petersson, Annika U.;Ray, Asim;Zetterberg, Fredrik. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2011.Quality Control of 3-Cyanophenylisocyanate This article mentions the following:

A novel series of P2Y₁₂ antagonists for development of drugs within the antiplatelet area is presented. The synthesis of 2-(4-carbamoylpiperazinyl)pyridine-5-carboxylates and their structure-activity relationships (SAR) are described. Several compounds showed P2Y₁₂ antagonistic activities in the sub-micromolar range. 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. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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

Fatty Acid Derived Renewable Platform Chemicals via Selective Oxidation Processes was written by von Czapiewski, Marc;Rhein, Michael;Meier, Michael A. R.. And the article was included in ACS Sustainable Chemistry & Engineering in 2018.Application of 106-79-6 This article mentions the following:

Highly efficient synthesis processes for the selective catalytic oxidation of unsaturated fatty acid Me esters (FAMEs) are described, leading to valuable renewable platform chems. Here keto-FAMEs derived from Me oleate and Me erucate were synthesized via a cocatalyst-free Wacker oxidation process using a high pressure reactor system. The catalytic system of palladium(II) chloride in dimethylacetamide/water enabled the oxidation of monounsaturated FAMEs in the presence of mol. oxygen as sole reoxidant with reduced amounts of solvent in shorter reaction time compared to previous reports. The high product selectivity is confirmed by two different synthesis approaches and the characterization of thereof derived products using mass spectrometry measurements (GC-MS, ESI-MS-MS). The obtained keto-FAMEs are used in a subsequent Baeyer-Villiger oxidations with m-CPBA, enabling the synthesis of diesters, thus allowing access to various platform chems. (e.g., hydroxy-esters, fatty alcs.). Moreover, an enone derivative, which can be obtained through selective photo peroxidation of Me oleate, is studied in the cocatalyst-free Wacker oxidation process leading to a 1,3-diketone. Addnl., the same enone is used in the Baeyer-Villiger oxidation with Oxone and m-CPBA as oxidant, allowing the highly selective synthesis of a vinyl acetate and an epoxy diester derivative, resp. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Application of 106-79-6).

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

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

White winemaking in the presence of oak chips of different origin and toasting level was written by Corona, Onofrio;de Filippi, Diego;Riccobono, Pietro;Plodari, Roberto;Scavone, Luigi. And the article was included in Industrie delle Bevande in 2011.SDS of cas: 15399-05-0 This article mentions the following:

Musts from Grillo autochthonous grapes grown in Western Sicily were fermented with medium toasted American oak wood chips or with non-toasted French oak chips. The obtained wines were significantly different in the contents in volatile and nonvolatile compounds extracted from the oak wood chips. Slight increases in alc. fermentation rate and in some cases higher contents of Et esters and medium-chain fatty acids were observed in musts fermented with the oak wood chips regardless of their origin. Wines made with French medium toasted oak wood chips had higher contents of phenolic aldehydes (syringic aldehyde, vanillin), furans (5-methylfurfural, trans-β-methyl-γ-octalactone), eugenol, tyrosol, and dihydromethoxycinnamyl alc. The wines made with oak wood chips had more complex sensory profiles and their aroma intensity was higher vs. control wines. Differences in visual and olfactory descriptors were also found. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0SDS of cas: 15399-05-0).

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

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

Visible-light photocatalytic preparation of alkenyl thioethers from 1,2,3-thiadiazoles and Hantzsch esters: synthetic and mechanistic investigations was written by Liang, Zhanqun;Lv, Kang;Zhou, Shaofang;Zhu, Changlei;Bao, Xiaoguang. And the article was included in Organic Chemistry Frontiers in 2021.Electric Literature of C9H10O3S This article mentions the following:

A protocol to synthesize trisubstituted alkenyl thioethers I (R¹ = Ph, 3-ClC₆H₄, 2-naphthyl, 2-thienyl, etc.; R² = i-Pr, cyclohexyl, PhCH₂, PhCMe₂, etc.) through a direct S-alkylation of 1,2,3-thiadiazoles II with C-radical precursors, 4-alkyl-1,4-dihydropyridines III (R³ = EtO₂C, t-BuO₂C, CN), driven by visible-light photocatalysis is disclosed. A broad range of primary, secondary and tertiary C-radical precursors is suitable for this reaction and the desired products can be obtained in good to excellent yields under mild conditions. Remarkably, high stereoselectivity with Z-alkenyl thioethers was achieved in the presence of a Cu(OAc)₂ catalyst. Synergistic exptl. and computational studies were carried out to shed light on the mechanisms of this reaction, in which the quenching pathway of an excited photocatalyst (*Ru^II) could be altered in the presence of the Cu(OAc)₂ catalyst. A reductive quenching pathway (Ru^II/*Ru^II/Ru^I/Ru^II) was proposed in the absence of the Cu(OAc)₂ catalyst while an oxidative quenching pathway (Ru^II/*Ru^II/Ru^III/Ru^II) was suggested with the assistance of the Cu(OAc)₂ catalyst. In addition, the origin of the Z-selectivity of the product was discussed. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8Electric Literature 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. 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 C9H10O3S

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

Internal functionalization in hyperbranched polyesters was written by Trollsas, M.;Hedrick, J.;Mecerreyes, D.;Jerome, R.;Dubois, Ph.. And the article was included in Journal of Polymer Science, Part A: Polymer Chemistry in 1998.Quality Control of Benzyl 2-hydroxy-2-methylpropanoate This article mentions the following:

Hyperbranched polyesters derived from the first and second generations of bis(hydroxymethyl)propionic acid (bis-MPA) benzyl esters to afford both AB₂ and AB₄ macromonomers, resp., were prepared The hyperbranched polyesters are effective initiators for the ROP of lactones, e.g., ε-caprolactone, in the presence of Sn(Oct)₂. Even more complex mol. architectures were developed using 1,4,9-trioxaspiro[4.6]-9-undecanone (TOSUO) as comonomer, after sequential deacetalization and reduction steps. This procedure produces hyper-branched polymers with significant hydroxy functionality at the periphery of the macromol. as well as dispersed along the chain backbone. 199457-33-5P 199457-35-7P 199457-37-9P 199541-92-9P 199541-93-0P 199541-94-1. In the experiment, the researchers used many compounds, for example, Benzyl 2-hydroxy-2-methylpropanoate (cas: 19444-23-6Quality Control of Benzyl 2-hydroxy-2-methylpropanoate).

Benzyl 2-hydroxy-2-methylpropanoate (cas: 19444-23-6) 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. 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 Benzyl 2-hydroxy-2-methylpropanoate

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

Identification of aroma-active components in black teas produced by six Chinese tea cultivars in high-latitude region by GC-MS and GC-O analysis was written by Wang, Baoyi;Chen, Huimin;Qu, Fengfeng;Song, Yakang;Di, Taimei;Wang, Peiqiang;Zhang, Xinfu. And the article was included in European Food Research and Technology in 2022.Formula: C12H20O2 This article mentions the following:

In this study, gas chromatog.-mass spectrometry (GC-MS) and gas chromatog.-olfactometry (GC-O) anal. was performed to figure out the characteristic aroma compounds of high-latitude black teas and select the suitable cultivar for producing high-aroma black tea. Sensory evaluation revealed that Jinxuan presented an obviously floral aroma and got the highest score, followed by Longjing Changye, Zhongcha 302, Yingshuang, Baihaozao and Huangshan Quntizhong. Furthermore, a total of 135 volatiles were identified in all black teas and 12 components can be used to distinguish different latitude black teas by principal component anal. (PCA). Cluster anal. (CA) showed six samples were divided into two clusters and Jinxuan was classified sep. of cluster B. Based on GC-O anal., 41 volatile organic compounds (VOCs) were found to promote the aroma of high-latitude black teas. Among them, phenylethyl alc., geraniol, linalool, α-ionone, cis-3-hexenyl hexanoate and Me salicylate were the major contributors to the floral fragrance of black tea and accounted for a relative high proportion in Jinxuan, Longjing Changye and Baihaozao. In summary, Jinxuan and Longjing Changye were suitable for producing high-quality black tea in high-latitude area. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Formula: C12H20O2).

(E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3) 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.Formula: C12H20O2

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

T-type calcium channel blockers: spiro-piperidine azetidines and azetidinones-optimization, design and synthesis was written by Smith, Elizabeth M.;Sorota, Steve;Kim, Hyunjin M.;McKittrick, Brian A.;Nechuta, Terry L.;Bennett, Chad;Knutson, Chad;Burnett, Duane A.;Kieselgof, Jane;Tan, Zheng;Rindgen, Diane;Bridal, Terry;Zhou, Xiaoping;Jia, Yu-Ping;Dong, Zoe;Mullins, Debbie;Zhang, Xiaoping;Priestley, Tony;Correll, Craig C.;Tulshian, Deen;Czarniecki, Michael;Greenlee, William J.. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2010.Category: esters-buliding-blocks This article mentions the following:

A series of spiro-azetidines and azetidinones has been evaluated as novel blockers of the T-type calcium channel (Ca_V3.2) which is a new therapeutic target for the potential treatment of both inflammatory and neuropathic pain. Confirmation and optimization of the potency, selectivity and DMPK properties of leads will be described. In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6Category: esters-buliding-blocks).

3-Cyanophenylisocyanate (cas: 16413-26-6) 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.Category: esters-buliding-blocks

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

Effect of different heat treatments on the Maillard reaction products, volatile compounds and glycation level of milk was written by Zhang, Yumeng;Yi, Shengnan;Lu, Jing;Pang, Xiaoyang;Xu, Xiaoxi;Lv, Jiaping;Zhang, Shuwen. And the article was included in International Dairy Journal in 2021.Computed Properties of C10H18O2 This article mentions the following:

In this study, the formation of Maillard reaction products and the Maillard reaction sites of milk proteins were studied under different heat treatment conditions. Fifteen samples heated at 75, 90, 105, 120 or 135°C for 5, 15 or 30 s were selected to investigate the effects of different heat treatment conditions on the Maillard reaction products volatile compounds and protein glycation degree. The contents of fluorescence intensity, furosine, lactulose, and 5-hydroxymethylfural were pos. associated with the heat temperature and treatment time. Compared with that of raw milk, the number of glycated proteins increased from 14 to 49 in the milk samples heated at 135°C for 5 s, and the number of binding sites increased from 47 to 166. These results advance current knowledge about the effect of different heat treatments on the degree of the Maillard reaction and the sensory quality and glycation level of milk. 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 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.Computed Properties of C10H18O2

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

Photocatalyzed reductive fluoroalkylation of 2-acetoxyglycals towards the stereoselective synthesis of α-1-fluoroalkyl-C-glycosyl derivatives was written by Mora Flores, Erwin W.;Uhrig, Maria Laura;Postigo, Al. And the article was included in Organic & Biomolecular Chemistry in 2020.Recommanded Product: (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate This article mentions the following:

A benign, efficient, regio- and stereoselective protocol for the syntheses of α-1-fluoroalkyl-C-glycosyl compounds bearing CF₃, C₄F₉, and C₆F₁₃ substituents on the anomeric carbon has been developed by a new methodol. starting from 2-acetoxyglycals for the first time. Remarkably, the reactions proceeded in only one step, through the visible light-photocatalyzed reductive fluoroalkylation of 2-acetoxyglycals by means of an Ir photocatalyst and employed com. available fluoroalkyl iodides n-C_nF_2n+1-I (n = 1, 4, 6) as a source of fluoroalkyl radicals. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4Recommanded Product: (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate).

(2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4) 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. 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.Recommanded Product: (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

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

Effect of aging pit on volatile compounds and sensory attributes of traditional Italian Fossa cheese was written by De Santis, Diana;Fidaleo, Marcello. And the article was included in LWT–Food Science and Technology in 2022.Electric Literature of C10H18O2 This article mentions the following:

This work evaluated how the gross chem. composition and color, the sensory characteristics, and the aromatic properties (evaluated through HS-SPME-GC), of Fossa cheese, a typical local Italian product aged in specially designed underground pits, are affected by the pit used for ripening. Four pits of different depth from 2.5 to 3.4 m were filled with sacs of cheese stacked on top of each other and used for the 90-day aging. Cheese samples taken from various positions inside each pit were collected and analyzed. Results showed statistically significant differences among the cheeses aged in the different sized pits for most of the studied characteristics. The multivariate anal. of the data revealed that many cheese properties, including the overall liking, were correlated with each other and with the pit depth. By inducing different levels of whey and fat loss into the pit (presence of liquid inside the pits after the completion of the aging process), varying pressures due to the differing depths of the pits could be responsible for the different modifications of the cheese (gross composition and shape) and the pit environment (humidity) influencing directly and indirectly, by controlling microflora development, cheese sensorial properties and volatile organic compounds (VOCs) production 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. 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.Electric Literature of C10H18O2

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