Month: December 2022

Preparation and characterization of β-cyclodextrin nanosponges and study on enhancing the solubility of insoluble nicosulfuron was written by Liu, Xiaofang;Li, Wei;Xuan, Guangshan. And the article was included in IOP Conference Series: Materials Science and Engineering in 2020.Safety of Diphenyl carbonate The following contents are mentioned in the article:

Nicosulfuron (NSF) is a water-insoluble and unstable sulfonylurea herbicide, which is mainly used in the treatment of stems and leaves after the corn seedling stage. Nanosponges (NS) have more interaction sites and higher drug encapsulation capabilities. In this paper, three kinds of β-cyclodextrin nanosponges (CDNS) were prepared by crosslinking β-cyclodextrin with di-Ph carbonate (DPC), pyromellitic dianhydride (PMDA) and epichlorohydrin (EP), resp. The NSF-loaded CDNS were characterized by TEM, FTIR, DSC, TGA and XRD. The solubility, stability and biol. activity of NSF were studied. The results showed NSFEP-CDNS could significantly enhance the solubility of NSF. In vitro release test, the cumulative release of NSF-EP-CDNS was 90.11%. Compared with pure NSF and NSF oil suspension, NSF-EP-CDNS had the strongest inhibitory effect on acetolactate synthase (ALS). In conclusion, CDNS have beneficial effects on the solubility, stability and biol. activity of NSF. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Safety of Diphenyl carbonate).

Diphenyl carbonate (cas: 102-09-0) 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. 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.Safety of Diphenyl carbonate

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

Phytochemical screening and in vitro hepatoprotective activity of Ipomoea obscura was written by Meena, B.;Santhi, G.. And the article was included in World Journal of Pharmaceutical Research in 2018.Application In Synthesis of Methyl nonadecanoate The following contents are mentioned in the article:

The World Health Organization (WHO) estimates that 80% of the people of developing countries rely on traditional medicines, mostly plant derived drugs for their primary health needs. Medicinal and preventing specific ailments are considered to play a significant role in health care. The use of plants in traditional systems is an indispensable source of medicinal preparations Hundreds of species recognized as having medicinal value. Indeed, ′phytomedicines′ to link traditional and modern medicines. In the present study to investigate the phytochems., histochem., fluorescence, GCMS anal. and hepatoprotective activity of Ipomoea obscura leaves. The results of the present study concluded that I. obscura leaves may be a good source of phytochems., histochem., fluorescence, GCMS. Over all the leaves of I. obscura is a source of phytochems. and possess hepatoprotective activity that can be important in oxidative stress mediated diseases diabetic, cancer, arthritis etc. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Application In Synthesis of Methyl nonadecanoate).

Methyl nonadecanoate (cas: 1731-94-8) 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. Polyesters are important plastics, with monomers linked by ester moieties. 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.Application In Synthesis of Methyl nonadecanoate

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

Mouth dissolving tablets: an innovative deviation in drug delivery system was written by Singh, Bharpoor;Bala, Rajni Miss;Gill, Naresh Singh. And the article was included in Journal of Pharmaceutical Sciences and Research in 2019.Category: esters-buliding-blocks The following contents are mentioned in the article:

The main aim of novel drug delivery system is to develop a dosage form which is easy to administer, free from side effects, exhibit immediate release and offer enhanced bioavailability for better patient compliance. To achieve such results oral drug delivery system, preferably, tablets are the most widely accepted dosage forms which offer numerous advantages. Beside those advantages, Dysphagia is the most common disadvantage of conventional tablets which is associated with number of conditions like sudden exposure of allergies, mental disability, motion sickness, unconsciousness, unavailability of water etc. To get rid from these problems several innovative drug delivery systems have been developed like Mouth Dissolving Tablets (MDT′s) which dissolve in saliva within a few seconds, when put on tongue. These tablets can be administered anywhere and anytime, without the need of water and are thus quite suitable for children, elderly and mentally disabled patients. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Category: esters-buliding-blocks).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) 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. 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

Glycosylation of Tetrabromobisphenol A in Pumpkin was written by Hou, Xingwang;Yu, Miao;Liu, Aifeng;Wang, Xiaoyun;Li, Yanlin;Liu, Jiyan;Schnoor, Jerald L.;Jiang, Guibin. And the article was included in Environmental Science & Technology in 2019.Quality Control of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate The following contents are mentioned in the article:

Tetrabromobisphenol A (TBBPA) is the most widely used brominated flame retardant (BFR), and it bioaccumulates throughout the food chains. Its fate in the first trophic level, plants, is of special interest. In this study, a four-day hydroponic exposure of TBBPA at a concentration of 1μmol L^-1 to pumpkin seedlings was conducted. A nontarget screening method for hydrophilic bromine-containing metabolites was modified, based on both typical isotope patterns of bromine and mass defect, and used to process mass spectra data. A total of 20 glycosylation and malonyl glycosylation metabolites were found for TBBPA in the pumpkin plants. Representative glycosyl TBBPA reference standards were synthesized to evaluate the contribution of this glycosylation process. Approx. 86% of parent TBBPA was metabolized to form those 20 glycosyl TBBPAs, showing that glycosylation was the most dominant metabolism pathway for TBBPA in pumpkin at the tested exposure concentration This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3Quality Control of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) 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. 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 (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

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

High pressure viscosity behaviour of tris(2-ethylhexyl) trimellitate up to 150 MPa was written by Lineira del Rio, Jose M.;Guimarey, Maria J. G.;Comunas, Maria J. P.;Fernandez, Josefa. And the article was included in Journal of Chemical Thermodynamics in 2019.COA of Formula: C15H22O2 The following contents are mentioned in the article:

This article presents a study on the viscous behavior at high pressure of a synthetic oil, tris(2-ethylhexyl) trimellitate. This fluid is being recommended as potential industrial reference material for high viscosity-high pressure measurements. Here we report new exptl. viscosity values for TOTM at temperatures from 278.15 K to 373.15 K and at pressures to 150 MPa with a maximum viscosity of 2570 mPa s. The measurements have been performed using a high pressure falling-body apparatus and a Couette rotational viscometer. The exptl. values obtained in this work are included in the database of a multinational project used recently to develop a reference correlation for TOTM. The universal viscosity-pressure coefficient of this fluid has been evaluated and compared with other oils, finding that it is close to the literature values of mineral oils. Moreover, we perform an anal. of the dependency of viscosity on pressure and temperature based on the d. scaling concept. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7COA of Formula: C15H22O2).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. COA of Formula: C15H22O2

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

Observing the On-Site Generation of Excitons and Charges by Low-Temperature Spectroscopy was written by Dou, Fei;Fei, Zhuping;Buchaca-Domingo, Ester;Brosseau, Colin-Nadeau;Leonelli, Richard;Heeney, Martin;Zhang, Xinping. And the article was included in ACS Applied Materials & Interfaces.Reference of 106-73-0 The following contents are mentioned in the article:

Understanding the relation between phase morphol. and phys. processes in polymer blends is the key to the fabrication of reproducible and reliable polymer optoelectronic devices. In this work, taking the advantage of low-temperature spectroscopy, we have observed the on-site generation of excitons and long-lived charges in different phase morphol. polymer/fullerene blends. Probing at 10K, the photo-generated species are localized to where they are generated. We found that the generation of excitons and long-lived charges is highly influenced by the local mol. phase morphol. We further demonstrated that although the influence of phase morphol. is localized to the place that excitons and long-lived charges are generated, this influence can persist over sub-millisecond timescales. Thus, we believe that the fate of excitons and long-lived charges is determined by the location at which they are generated, which can in turn be controlled precisely by mol. phase morphol. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Reference of 106-73-0).

Methyl heptanoate (cas: 106-73-0) 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. 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.Reference of 106-73-0

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

En Route to CO2-Based (a)Cyclic Carbonates and Polycarbonates from Alcohols Substrates by Direct and Indirect Approaches was written by Brege, Antoine;Grignard, Bruno;Mereau, Raphael;Detrembleur, Christophe;Jerome, Christine;Tassaing, Thierry. And the article was included in Catalysts in 2022.Synthetic Route of C13H10O3 The following contents are mentioned in the article:

A review. This review is dedicated to the state-of-the art routes used for the synthesis of CO₂-based (a)cyclic carbonates and polycarbonates from alc. substrates, with an emphasis on their resp. main advantages and limitations. The first section reviews the synthesis of organic carbonates such as dialkyl carbonates or cyclic carbonates from the carbonation of alcs. Many different synthetic strategies have been reported (dehydrative condensation, the alkylation route, the “leaving group” strategy, the carbodiimide route, the protected alcs. route, etc.) with various substrates (mono-alcs., diols, allyl alcs., halohydrins, propargylic alcs., etc.). The second section reviews the formation of polycarbonates via the direct copolymerization of CO₂ with diols, as well as the ring-opening polymerization route. Finally, polycondensation processes involving CO₂-based di-Me and di-Ph carbonates with aliphatic and aromatic diols are described. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Synthetic Route of C13H10O3).

Diphenyl carbonate (cas: 102-09-0) 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.Synthetic Route of C13H10O3

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

Glucopyranoside-Functionalized NHCs-Pd(II)-PEPPSI Complexes: Anomeric Isomerism Controlled and Catalytic Activity in Aqueous Suzuki Reaction was written by Zhou, Zhonggao;Xie, Qian;Li, Jing;Yuan, Yangyang;Liu, Yong;Liu, Yulong;Lu, Dongliang;Xie, Yongrong. And the article was included in Catalysis Letters in 2022.SDS of cas: 604-69-3 The following contents are mentioned in the article:

The first system controlled anomeric isomerism of glucopyranoside-functionalized N-heterocyclic carbenes based pyridine enhanced precatalyst preparation, stabilization and initiation type palladium(II) complexes (Glu-NHCs-Pd(II)-PEPPSI) were prepared and fully characterized. It is interesting to note that pure β-anomer PEPPSI complex was obtained, in which the Glu-substituent connects to the imidazole heterocycle ring N through ethoxy bridged anomeric carbon. In addition, the catalytic activities revealed that Glu-NHCs-Pd(II)-PEPPSI complexes are efficient catalysts for the aqueous Suzuki reaction. Under optimized conditions, a series of fluorene-cored functional materials with different aryl-substituents were synthesized through the Suzuki reaction with excellent yields. The Glu-NHCs-Pd(II)-PEPPSI complex containing bulky and rigid 2,5-dimethylphenyl group played an important role in maintaining the β conformation and improving the catalytic activity significantly. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3SDS of cas: 604-69-3).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) 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. 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.SDS of cas: 604-69-3

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

Hexagonal boron nitride stationary phase for gas chromatography was written by Xiong, Xue;Qi, Meiling. And the article was included in Journal of Chromatography A in 2018.Application of 106-73-0 The following contents are mentioned in the article:

This work describes the separation performance of using hexagonal boron nitride (h-BN) as the stationary phase for capillary gas chromatog. (GC). The statically coated h-BN column showed moderate polarity and achieved column efficiencies of 3455 plates/m and 3800 plates/m for naphthalene and n-dodecane, resp. With temperature-dependent structure properties, the h-BN stationary phase exhibited stronger retention for polycyclic aromatic hydrocarbons (PAHs) over phthalic acid esters (PAEs) and showed advantageous separation performance over the g-C₃N₄ and com. polysiloxane stationary phases. Also, it displayed preferential retention for halogenated analytes and high resolution performance for structural and positional isomers. The h-BN column showed good column repeatability with relative standard deviation values of 0.03%-0.07% for run-to-run, 0.31%-0.71% for day-to-day and 2.6%-5.3% for column-to-column, resp., and thermal stability up to 260°C. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Application of 106-73-0).

Methyl heptanoate (cas: 106-73-0) 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.Application of 106-73-0

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

The effects of alpha irradiation on the optical reflectivity of composite polymers was written by Chavan, Vivek;Kulkarni, Atul;Lee, Sang-Deok;Kanade, Vinit;Lee, Dongmok;Kim, Hyeong-U.;Kim, Do Yoon;Kim, Taesung;Bhoraskar, Sudha;Bhoraskar, V. N.;Hong, Seung-Woo. And the article was included in Radiation Physics and Chemistry in 2022.Safety of 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate The following contents are mentioned in the article:

This paper reports an increase in the optical reflectivity of two kinds of copolymers used in contact lenses, with different proportions of silicon and fluorine derivatives, when irradiated with 4.1 MeV alpha particles from an 241Am source. The fiber-optic reflectance technique showed that the lens with a higher proportion of silicon and fluorine content and a lower proportion of methyl-methacrylate is more susceptible to alpha radiation. XPS and Raman spectroscopy have revealed the formation of silicon oxide and carbide species as a result of chain scission and recombination in the 20μm thick irradiated regions of lens materials. It is presumed that the high (260 eV/nm) linear energy transfer of alpha particles in polymers creates trapped gas ”Bubbles”’, and the observed increase in the optical reflectivity with increased irradiation time is explained on the basis of diffuse reflectance caused by the scattering of light from the hard surfaces of these ”Bubbles”. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Safety of 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate).

1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3) 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. 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 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate

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