Tag: 100-200

On February 1, 2022, Sanchez, Ramon; Rodriguez-Nogales, Jose Manuel; Fernandez-Fernandez, Encarnacion; Gonzalez, Maria Rosa; Medina-Trujillo, Laura; Martin, Pedro published an article.Application In Synthesis of Diethyl succinate The title of the article was Volatile composition and sensory properties of wines from vineyards affected by iron chlorosis. And the article contained the following:

Recent studies have shown that mild to moderate iron chlorosis can have pos. effects on grape quality potential, including volatile profile. The main objective of this work was to investigate, for the first time, how moderate iron stress in grapevines affects the presence of volatile organic compounds (VOCs) in wines. The study was carried out during 2018-2019 seasons, in 20 Tempranillo vineyard subzones with different degree of iron deficiency, located in Ribera del Duero (North-Central Spain). The results showed that moderate iron stress increased in wines the concentrations of VOCs associated with floral notes, such as 2-phenylacetaldehyde, 2-phenylethanol and 2-phenylethyl acetate, while reducing the presence of C6-alcs., responsible for green-herbaceous aroma. A favorable reduction of pH and a betterment of parameters related to color were detected in wines from iron deficient subzones. Chlorosis incidence was associated to improvements in wine sensory attributes as layer intensity, black fruit and aroma intensity. The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).Application In Synthesis of Diethyl succinate

The Article related to iron chlorosis 2phenylacetaldehyde 2phenylethanol 2phenylethyl acetate black fruit stress, aroma, nutritional stress, tempranillo, vitis vinifera, Food and Feed Chemistry: Beverages and other aspects.Application In Synthesis of Diethyl succinate

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

On November 15, 2019, Shenouda, Hannah; Alexanian, Erik J. published an article.Name: (R)-Methyl 3-hydroxybutanoate The title of the article was Manganese-Catalyzed Stereospecific Hydroxymethylation of Alkyl Tosylates. And the article contained the following:

The development of a stereospecific hydroxymethylation of alkyl tosylates using an inexpensive, first-row catalyst is described. The transformation proceeds under mild conditions with low pressure to deliver homologated alcs. as products. Chiral, nonracemic β-branched primary alcs. are obtained with high enantiospecificity from easily accessed secondary alkyl substrates. Simple modification of the reaction system also permits access to α-d2 alcs. These studies use anionic metal carbonyl catalysis to access a synthetic equivalent of the challenging hydroxymethyl anion from carbon monoxide. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Name: (R)-Methyl 3-hydroxybutanoate

The Article related to primary alc preparation enantioselective, alkyl tosylate hydroxymethylation manganese catalyst, Aliphatic Compounds: Alcohols and Thiols and other aspects.Name: (R)-Methyl 3-hydroxybutanoate

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

Arndt, Daniel; Wachsmuth, Christian; Buchholz, Christoph; Bentley, Mark published an article in 2020, the title of the article was A complex matrix characterization approach, applied to cigarette smoke, that integrates multiple analytical methods and compound identification strategies for non-targeted liquid chromatography with high-resolution mass spectrometry.Application In Synthesis of 3-Acetyldihydrofuran-2(3H)-one And the article contains the following content:

Rationale : For the characterization of the chem. composition of complex matrixes such as tobacco smoke, containing more than 6000 constituents, several anal. approaches have to be combined to increase compound coverage across the chem. space. Furthermore, the identification of unknown mols. requiring the implementation of addnl. confirmatory tools in the absence of reference standards, such as tandem mass spectrometry spectra comparisons and in silico prediction of mass spectra, is a major bottleneck. Methods : We applied a combination of four chromatog./ionization techniques (reversed-phase (RP) – heated electrospray ionization (HESI) in both pos. (+) and neg. (-) modes, RP – atm. pressure chem. ionization (APCI) in pos. mode, and hydrophilic interaction liquid chromatog. (HILIC) – HESI pos.) using a Thermo Q Exactive® liquid chromatog./high-resolution accurate mass spectrometry (LC/HRAM-MS) platform for the anal. of 3R4F-derived smoke. Compound identification was performed by using mass spectral libraries and in silico predicted fragments from multiple integrated databases. Results : A total of 331 compounds with semi-quant. estimates ≥100 ng per cigarette were identified, which were distributed within the known chem. space of tobacco smoke. The integration of multiple LC/HRAM-MS-based chromatog./ionization approaches combined with complementary compound identification strategies was key for maximizing the number of amenable compounds and for strengthening the level of identification confidence. A total of 50 novel compounds were identified as being present in tobacco smoke. In the absence of reference MS2 spectra, in silico MS2 spectra prediction gave a good indication for compound class and was used as an addnl. confirmatory tool for our integrated non-targeted screening (NTS) approach. Conclusions : This study presents a powerful chem. characterization approach that has been successfully applied for the identification of novel compounds in cigarette smoke. We believe that this innovative approach has general applicability and a huge potential benefit for the anal. of any complex matrixes. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Application In Synthesis of 3-Acetyldihydrofuran-2(3H)-one

The Article related to cigarette smoke composition high resolution accurate mass spectrometry, Toxicology: Methods (Including Analysis) and other aspects.Application In Synthesis of 3-Acetyldihydrofuran-2(3H)-one

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

Kodama, Susumu; Yoshii, Nao; Ota, Akihiro; Takeshita, Jun-ichi; Yoshinari, Kouichi; Ono, Atsushi published an article in 2021, the title of the article was Association between in vitro nuclear receptor-activating profiles of chemical compounds and their in vivo hepatotoxicity in rats.Formula: C6H8O3 And the article contains the following content:

The liver plays critical roles to maintain homeostasis of living organisms and is also a major target organ of chem. toxicity. Meanwhile, nuclear receptors (NRs) are known to regulate major liver functions and also as a critical target for hepatotoxic compounds In this study, we established mammalian one-hybrid assay systems for five rat-derived NRs, namely PXR, PPARα, LXRα, FXR and RXRα, and evaluated a total of 326 compounds for their NR-activating profiles. Then, we assessed the association between their NR-activating profile and hepatotoxic endpoints in repeated-dose toxicity data of male rats from Hazard Evaluation Support System. In the in vitro cell-based assays, 68, 38, 20, 17 and 17 compounds were identified as positives for PXR, PPARα, LXRα, FXR and RXRα, resp. The association analyses demonstrated that the PXR-pos. compounds showed high frequency of endpoints related to liver hypertrophy, such as centrilobular hepatocellular hypertrophy, suggesting that PXR activation is involved in chem.-induced liver hypertrophy in rats. It is intriguing to note that the PXR-pos. compounds also showed statistically significant associations with both prolonged activated partial thromboplastin time and prolonged prothrombin time, suggesting a possible involvement of PXR in the regulation of blood clotting factors. Collectively, our approach may be useful for discovering new functions of NRs as well as understanding the complex mechanism for hepatotoxicity caused by chem. compounds The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Formula: C6H8O3

The Article related to chem compound nuclear receptor activating profile hepatotoxicity, Toxicology: Methods (Including Analysis) and other aspects.Formula: C6H8O3

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

On January 4, 2017, Bohman, Bjorn; Flematti, Gavin R.; Unelius, C. Rikard published an article.SDS of cas: 3976-69-0 The title of the article was Practical one-pot stereospecific preparation of vicinal and 1,3-diols. And the article contained the following:

A facile one-pot synthesis providing vicinal diols and 1,3-diols in >95% stereoisomeric purity from com. available enantiopure hydroxy esters has been developed. The esters were reduced with DIBALH and alkylated in situ with 4-pentenylmagnesium bromide, which after workup generated the title diols as diastereomeric pairs. These pairs were easily separated by preparative chromatog., affording products with retained stereoisomeric purity from the starting materials. This method represents an expedient preparation of many common natural products, such as cerambycid beetle pheromones and intermediates towards bicyclic acetal bark beetle pheromones. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).SDS of cas: 3976-69-0

The Article related to diol stereoselective preparation, hydroxy ester reduction, Aliphatic Compounds: Alcohols and Thiols and other aspects.SDS of cas: 3976-69-0

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

Yue, Qiming; Zhao, Yi; Sun, Baohou; Hai, Li; Guo, Li; Wu, Yong published an article in 2015, the title of the article was First Synthesis and Characterization of Stereoisomers of Choleretic Drug Dihydroxydibutylether.HPLC of Formula: 3976-69-0 And the article contains the following content:

The synthesis of the four stereoisomers (R)-3-((R)-3-hydroxylbutoxy)-1-butanol, (R)-3-((S)-3-hydroxylbutoxy)-1-butanol, (S)-3-((R)-3-hydroxylbutoxy)-1-butanol and (S)-3-((S)-3-hydroxylbutoxy)-1-butanol from readily available starting materials, methyl(R/S)-3-hydroxybutanoate, in 9 steps with overall yields of 13%’-‘17% was reported. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).HPLC of Formula: 3976-69-0

The Article related to hydroxylbutoxy butanol diastereoselctive preparation, Aliphatic Compounds: Ethers and Sulfides and other aspects.HPLC of Formula: 3976-69-0

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

On December 21, 2020, Omaiye, Esther E.; Luo, Wentai; McWhirter, Kevin J.; Pankow, James F.; Talbot, Prue published an article.Synthetic Route of 85-91-6 The title of the article was Electronic Cigarette Refill Fluids Sold Worldwide: Flavor Chemical Composition, Toxicity, and Hazard Analysis. And the article contained the following:

Flavor chems. in electronic cigarette (EC) fluids, which may neg. impact human health, have been studied in a limited number of countries/locations. To gain an understanding of how the composition and concentrations of flavor chems. in ECs are influenced by product sale location, we evaluated refill fluids manufactured by one company (Ritchy LTD) and purchased worldwide. Flavor chems. were identified and quantified using gas chromatog./mass spectrometry (GC/MS). We then screened the fluids for their effects on cytotoxicity (MTT assay) and proliferation (live-cell imaging) and tested authentic standards of specific flavor chems. to identify those that were cytotoxic at concentrations found in refill fluids. A total of 126 flavor chems. were detected in 103 bottles of refill fluid, and their number per/bottle ranged from 1-50 based on our target list. Two products had none of the flavor chems. on our target list, nor did they have any nontargeted flavor chems. A total of 28 flavor chems. were present at concentrations ≥1 mg/mL in at least one product, and 6 of these were present at concentrations ≥10 mg/mL. The total flavor chem. concentration was ≥1 mg/mL in 70% of the refill fluids and ≥10 mg/mL in 26%. For sub-brand duplicate bottles purchased in different countries, flavor chem. concentrations were similar and induced similar responses in the in vitro assays (cytotoxicity and cell growth inhibition). The levels of furaneol, benzyl alc., ethyl maltol, Et vanillin, corylone, and vanillin were significantly correlated with cytotoxicity. The margin of exposure calculations showed that pulegone and estragole levels were high enough in some products to present a nontrivial calculated risk for cancer. Flavor chem. concentrations in refill fluids often exceeded concentrations permitted in other consumer products. These data support the regulation of flavor chems. in EC products to reduce their potential for producing both cancer and noncancer toxicol. effects. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Synthetic Route of 85-91-6

The Article related to electronic cigarette fluid flavor toxicity hazard, Toxicology: Methods (Including Analysis) and other aspects.Synthetic Route of 85-91-6

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

On February 1, 2019, Spender, Lindsay C.; John Ferguson, G.; Hughes, Gareth D.; Davies, Barry R.; Goldberg, Frederick W.; Herrera, Blanca; Taylor, Richard G.; Strathearn, Lauren S.; Sansom, Owen J.; Barry, Simon T.; Inman, Gareth J. published an article.COA of Formula: C7H10O3 The title of the article was Preclinical evaluation of AZ12601011 and AZ12799734, inhibitors of transforming growth factor beta superfamily type 1 receptors. And the article contained the following:

Here, we characterize the biol. effects of two transforming growth factor beta receptor 1 (TGFBR1) kinase inhibitors designed to target TGFbeta signaling. AZ12601011 [2-(2-pyridinyl)-4-(1H-pyrrolo[3,2-c]pyridin-1-yl)-6,7-dihydro-5H-cyclopenta[d]pyrimidine]; structure previously undisclosed] and AZ12799734 [4-({4-[(2,6-dimethyl-3-pyridinyl) oxy]-2-pyridinyl}amino)benzenesulfonamide] (IC50 = 18 and 47 nM, resp.) were more effective inhibitors of TGF beta-induced reporter activity than SB-431542 [4-[4-(1,3-benzodioxol-5-yl)-5-(2-pyridinyl)-1H-imidazol-2-yl]benzamide] (IC50 = 84 nM) and LY2157299 [4-[2-(6-methylpyridin-2-yl)-5,6-dihydro-4H-pyrrolo[ 1,2-b]pyrazol-3-yl]quinoline-6-carboxamide monohydrate]] (galunisertib) (IC50 = 380 nM). AZ12799734, however, is a pan TGF/BMP inhibitor, inhibiting receptor-mediated phosphorylation of SMAD1 by activin A receptor type 1L, bone morphogenetic protein receptor type 1A, and bone morphogenetic protein receptor type 1B and phosphorylation of SMAD2 by ALK4, TGFBR1, and ALK7. AZ12601011 was highly effective at inhibiting basal and TGF beta-induced migration of HaCaT keratinocytes and, furthermore, inhibited tumor growth and metastasis to the lungs in a 4T1 syngeneic orthotopic mammary tumor model. These inhibitors provide new reagents for investigating in vitro and in vivo pathogenic processes and the contribution of TGF beta- and BMP-regulated signaling pathways to disease states. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).COA of Formula: C7H10O3

The Article related to fibroblast tgf beta smad2 smad1, Placeholder for records without volume info and other aspects.COA of Formula: C7H10O3

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

Valverde, David; Munoz, Ivan; Garcia-Verdugo, Eduardo; Altava, Belen; Luis, Santiago V. published an article in 2021, the title of the article was Preparation of Nanofibers Mats Derived from Task-Specific Polymeric Ionic Liquid for Sensing and Catalytic Applications.Safety of 3-Aminodihydrothiophen-2(3H)-one hydrochloride And the article contains the following content:

Nanofibers mats derived from the task-specific functionalized polymeric ionic liquids based on homocysteine thiolactone are obtained by electrospinning them as blends with polyvinylpyrrolidone. The presence of this functional moiety allowed the post-functionalization of these mats through the aminolysis of the thiolactone ring in the presence of an amine by a thiol-alkene “click” reaction. Under controlled exptl. conditions the modification can be performed introducing different functionalization and crosslinking of the electrospun fibers, while maintaining the nanostructure obtained by the electrospinning. Initial studies suggest that the nanofibers based on these functionalized polymeric ionic liquids can be used in both sensing and catalytic applications. The experimental process involved the reaction of 3-Aminodihydrothiophen-2(3H)-one hydrochloride(cas: 6038-19-3).Safety of 3-Aminodihydrothiophen-2(3H)-one hydrochloride

The Article related to polymeric ionic liquid nanofiber mat sensing catalytic application, catalysis, electrospinning, nanofibers, poly(homocysteine thiolactone), sensing, Textiles and Fibers: Preparation Of Fibers and other aspects.Safety of 3-Aminodihydrothiophen-2(3H)-one hydrochloride

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

On December 24, 2015, Zhang, Jun-Hui; Xie, Sheng-Ming; Wang, Bang-Jin; He, Pin-Gang; Yuan, Li-Ming published an article.Quality Control of (R)-Methyl 3-hydroxybutanoate The title of the article was Highly selective separation of enantiomers using a chiral porous organic cage. And the article contained the following:

Porous solids composed of shape-persistent organic cage mols. have attracted considerable attention due to their important applications such as mol. separation, heterogeneous catalysis, and gas storage. An imine-linked porous organic cage (POC) CC10 ((4E,6R,7R,8E,15E,17R,18R,19E,26E,28R,29R,30E,37E,39R,40R,41E,45E,47R,48R,49E,53E,55R,56R,57E)-6,7,17,18,28,29,39,40,47,48,55,56-dodecakis(4-fluorophenyl)-5,8,16,19,27,30,38,41,46,49,54,57-Dodecaazaheptacyclo[21.21.6.612,34.13,43.110,14.121,25.132,36]hexaconta-1,3(51),4,8,10,12,14(60),15,19,21,23 ,25(59),26,30,32,34,36(52),37,41,43,45,49,53,57-tetracosaene) diluted with a polysiloxane OV-1701 was explored as a novel stationary phase for high-resolution gas chromatog. (GC). A wide variety of enantiomers belonging to different classes of organic compounds were resolved on the coated capillary column, including chiral alcs., esters, ketones, ethers, halohydrocarbons, epoxides, and organic acids. The fabricated column complements to com. β-DEX 120 column and the authors’ recently reported CC3-R column for separating enantiomers, which indicates that the excellent chiral recognition ability of CC10 is not only interesting academically, but also has potential for practical application. CC10 also exhibits good selectivity for the separation of n-alkanes, n-alcs., Grob mixture, and positional isomers. Also this type of chiral POCs will become a new class of chiral selector in the near future. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Quality Control of (R)-Methyl 3-hydroxybutanoate

The Article related to gas chromatog porous organic cage chiral stationary phase, capillary columns, chiral separation, gas chromatography, porous molecular materials, porous organic cage, Organic Analytical Chemistry: Separations and other aspects.Quality Control of (R)-Methyl 3-hydroxybutanoate

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