Tag: 300-400

Characteristics and deoxy-liquefaction of cellulose extracted from cotton stalk was written by Li, Jinhua;Zhang, Shuai;Gao, Boyang;Yang, Aikai;Wang, Zonghua;Xia, Yanzhi;Liu, Haichao. And the article was included in Fuel in 2016.Product Details of 1731-94-8 The following contents are mentioned in the article:

Cellulose was extracted from cotton stalk and characterized by using scanning electron microscope (SEM), XRD, NMR, and FTIR spectroscopy. The extracted cellulose had representative cellulose structure. Also, the extracted cellulose was converted into liquid oil by direct deoxy-liquefaction. The elemental anal., FTIR spectroscopy and gas chromatog.-mass spectrometry (GC-MS) analyses of the liquid oil indicated that the extracted cellulose oil was mainly composed of aromatic hydrocarbons, phenols and alkanes. This oil featured high quality including the low O content of 6.46% and the higher heating value (HHV) of 42.66 MJ/kg. Probably deoxy-liquefaction technique is an effective way to convert cellulose into high-quality liquid fuel and value-added chems. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Product Details of 1731-94-8).

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. 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.Product Details of 1731-94-8

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

Enzyme-Catalyzed Regioselective Acetylation of Functionalized Glycosides was written by Holmstroem, Thomas;Pedersen, Christian Marcus. And the article was included in European Journal of Organic Chemistry in 2020.Recommanded Product: 604-69-3 The following contents are mentioned in the article:

Novozym 435 (N435) is an immobilized lipase (Candida antarctica lipase B) capable of catalyzing transesterfications in organic media. This paper describes how this enzyme can be used for regioselective acetylation of unprotected carbohydrates providing protected monosaccharide building blocks in only one step. Unprotected thiogylcosides with both gluco, xylo, and manno stereochem. were tolerated by the enzyme and afforded the acetylated products in high yields. The regioselective acetylation was easily scaled up to a 5.0 g scale and in most cases, no purification was needed. Several other glycosides, including 2-azido-2-deoxy glucosides, galactosides, and gluconolactones, were also acetylated and the scope and limitations using N435 has been uncovered. 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: 604-69-3Recommanded Product: 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 typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 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.Recommanded Product: 604-69-3

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

Chemically induced porogen decomposition in premembranes for porogen-derived membranes was written by Eyal, A. M.;Hajdu, K.;Hazan, B.;Edelstein, D.. And the article was included in Journal of Applied Polymer Science in 1992.Formula: C18H34O4 The following contents are mentioned in the article:

Studies of chem. induced porogen decomposition in porogen-derived membranes show that substantially complete decomposition of porogen mols., molecularly dispersed in the polymeric matrix, is attainable. Several hours are required for decomposition by reagents penetrating into the premembrane at ambient. Decomposition rate is determined by the characteristics of polymer, porogen, decomposition reagent, polymer/porogen weight ratio, reagent concentration, and temperature The concept of decomposition by an internal catalyst is also validated. In addition to direct relevance to the new method of membrane formation, the study provides better understanding of phenomena of general interest, such as transport of small mols. through changing polymeric matrixes. This study involved multiple reactions and reactants, such as Di-tert-butyl decanedioate (cas: 143050-66-2Formula: C18H34O4).

Di-tert-butyl decanedioate (cas: 143050-66-2) 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. Polyesters are important plastics, with monomers linked by ester moieties. 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.Formula: C18H34O4

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

Synthes1is of glycosyl sulfoximines by a highly chemo- and stereoselective NH- and O-transfer to thioglycosides was written by Tota, Arianna;Carlucci, Claudia;Pisano, Luisa;Cutolo, Giuliano;Clarkson, Guy J.;Romanazzi, Giuseppe;Degennaro, Leonardo;Bull, James A.;Rollin, Patrick;Luisi, Renzo. And the article was included in Organic & Biomolecular Chemistry in 2020.Application In Synthesis 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:

A synthesis of unprecedented and stable glycosyl sulfoximines is reported. The developed strategies represent the first example of highly stereoselective sulfoximine formation directly from thioglycosides. This synthetic protocol has been tested on several β-thioglycosides bearing different aromatics and alkyls as S-substituents, and bearing glucose, mannose and galactose as glycosyl units. The process has been extended to a lactose derived thioglycoside and to a glucose derived sulfenamide. The process was chemo- and stereoselective, and X-ray anal. confirmed the structure and provided stereochem. information on the configuration at the sulfur atom. A model for the stereochem. outcome is proposed based on the steric environment of the sulfide. 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: 604-69-3Application In Synthesis 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 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 (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

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

Development of a novel acetyl glucose-modified gefitinib derivative to enhance the radiosensitizing effect was written by Yamahana, Hirari;Kunieda, Yukari;Tominaga, Masahide;Yamada, Hisatsugu;Uto, Yoshihiro. And the article was included in Bioorganic & Medicinal Chemistry in 2021.Name: (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate The following contents are mentioned in the article:

Various radiosensitizers are being developed to increase the radiation sensitivity of hypoxic cancer cells, which show resistance to radiation. Previously, we demonstrated that an acetyl glucose-modified nitroimidazole derivative showed a high radiosensitizing effect by inhibiting glucose uptake and glycolysis. Based on this finding, we designed and synthesized novel sugar hybrid radiosensitizers, wherein acetyl glucose was introduced into gefitinib. Among them, UTX-114 had higher autophosphorylation and radiosensitizing activity than gefitinib and inhibited glucose uptake. This result supports our hypothesis that an acetyl glucose moiety improves the radiosensitizing effect of the drug, and UTX-114 can be expected to be a leading compound with a radiosensitizing effect. 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: 604-69-3Name: (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 typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 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.Name: (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

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

Inductive QSAR descriptors. Distinguishing compounds with antibacterial activity by artificial neural networks was written by Cherkasov, Artem. And the article was included in International Journal of Molecular Sciences in 2005.Name: 4-Acetamidophenyl 2-acetoxybenzoate The following contents are mentioned in the article:

On the basis of the previous models of inductive and steric effects, ‘inductive’ electronegativity and mol. capacitance, a range of new ‘inductive’ QSAR descriptors has been derived. These mol. parameters are easily accessible from electronegativities and covalent radii of the constituent atoms and interat. distances and can reflect a variety of aspects of intra- and intermol. interactions. Using 34 ‘inductive’ QSAR descriptors alone we have been able to achieve 93% correct separation of compounds with- and without antibacterial activity (in the set of 657). The elaborated QSAR model based on the Artificial Neural Networks approach has been extensively validated and has confidently assigned antibacterial character to a number of trial antibiotics from the literature. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Name: 4-Acetamidophenyl 2-acetoxybenzoate).

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

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

Study on metabolites from an endophyte of Taxus yunnanensis was written by Yuan, Yao;Liu, Jia-jia;Chen, Shu-juan;Wang, Xiao-jun. And the article was included in Zhongnan Linye Keji Daxue Xuebao in 2010.Quality Control of 4-Acetamidophenyl 2-acetoxybenzoate The following contents are mentioned in the article:

A strain of Penicillium spp. was isolated from barks of Taxus yunnanensis as an endophyte. Metabolite of it was separated and analyzed. Two bioactive compounds were isolated from the extract of fungus mycelium by silica gel chromatog. The structures were elucidated to be ergosterol peroxide and benorilate on the basis of detailed spectroscopic anal. and comparison with the literatures. Ergosterol peroxide is on anti-tumor and anti-microbial active compound, and benorilate is a kind of widely used anti-inflammatory drug. The yield is 2.0 and 1.5mg/L. Other components were elucidated to be mainly n-tridecanoic acid, 9-octadecenoic acid and some other fatty acid based on GC/MS anal. It is the first report of natural source of benorilate, especially from plant endophyte. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Quality Control of 4-Acetamidophenyl 2-acetoxybenzoate).

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

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

Chemical glucosylation of pyridoxine was written by Bachmann, Thomas;Rychlik, Michael. And the article was included in Carbohydrate Research in 2020.Product Details of 604-69-3 The following contents are mentioned in the article:

The chem. synthesis of pyridoxine-5′-β-D-glucoside (5′-β-PNG) was investigated using various glucoside donors and promoters. Hereby, the combination of α-4,3-O-isopropylidene pyridoxine, glucose vested with different leaving and protecting groups and the application of stoichiometric amounts of different promoters was examined with regards to the preparation of the twofold protected PNG. Best results were obtained with 2,3,4,6-tetra-O-acetyl-D-glucopyranosyl fluoride and boron trifluoride etherate (2.0 equivalent) as promoter at 0°C (59%). The deprotection was accomplished stepwise with potassium/sodium hydroxide in acetonitrile/water followed by acid hydrolysis with formic acid resulting in the chem. synthesis of 5′-β-PNG. 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: 604-69-3Product Details of 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. 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.Product Details of 604-69-3

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

Exploratory analysis of biodiesel by combining comprehensive two-dimensional gas chromatography and multiway principal component analysis was written by Mogollon, Noroska G. S.;Ribeiro, Fabiana A. L.;Poppi, Ronei J.;Quintana, Araceli L.;Chavez, Juan A. G.;Agualongo, Darwin A. P.;Aleme, Helga G.;Augusto, Fabio. And the article was included in Journal of the Brazilian Chemical Society in 2017.Safety of Methyl nonadecanoate The following contents are mentioned in the article:

Comprehensive two-dimensional gas chromatog. (GC×GC) was used in this work in order to reveal and identify minor compounds of several raw materials in biodiesel samples, which are not detected by conventional GC anal. Multiway principal component anal. (MPCA) of the chromatog. profile allowed to identify compounds as C15:1n-3, C18:2n-6, C20:1n-6, C20:3n-3, C20:3n-6, C20:4n-6 C20:5n-3, C21:1n-6, C22:1n-9, C23:1n-9, C24:1n-9 multiunsatd. which were useful tracers to discriminate between biodiesel samples. In this way, the separation power of GC×GC combined with the MPCA algorithm proved to be a valuable strategy for biodiesel samples classification, allowing identification and providing addnl. compounds of the commonly known as chem. profile of biodiesel samples. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Safety of Methyl nonadecanoate).

Methyl nonadecanoate (cas: 1731-94-8) 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 Methyl nonadecanoate

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

The comparative gastric ulcerogenic activities of nonsteroid antiinflammatory drugs was written by Rainsford, K. D.. And the article was included in Agents and Actions in 1977.Synthetic Route of C17H15NO5 The following contents are mentioned in the article:

A new gastric assay was employed to screen for the ulcerogenic activity of non-steroid antiinflammatory (NSAI) analgesics. The technique involves exposing rats to brief periods of cold stress, which is not itself sufficient to cause mucosal damage, but does specifically sensitize the stomach to irritant or ulcerogenic actions of NSAI drugs. The assessment of gastric ulcerogenicity of some well-known antiinflammatory/analgesic drugs using this new assay was shown to agree well with clin. reports of the occurrence of gastric ulceration and hemorrhage. This assay was employed to screen for the ulcerogenicity of some new antiinflammatory drugs and for potential drug interactions resulting from administration of certain frequently used combinations of these drugs. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Synthetic Route of C17H15NO5).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) 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.Synthetic Route of C17H15NO5

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