Tag: 300-400

Catalytic and Atom-Economic Glycosylation using Glycosyl Formates and Cheap Metal Salts was written by Yang, Liang;Hammelev, Christian H.;Pedersen, Christian M.. And the article was included in ChemSusChem in 2020.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:

Benzylated glycosyl formates have been synthesized in one step from the corresponding hemiacetal or orthoester with formic acid as the sole reagent. The glycosyl formates are used as glycosyl donors under catalytic conditions with cheap metal catalysts based on iron or bismuth. A ¹³C NMR spectroscopic method is developed and evaluated for screening reactions conditions, giving precise information on the selectivity, yield, and byproducts formed. The major side reaction is transesterification, which gives the formylated acceptor and regenerates the hemiacetal. By using this approach, catalyst loadings and solvents are optimized and the scope of the glycosylation is evaluated for a variety of glycosyl donors and acceptors. A proof of concept for a traceless glycosylation, utilizing a dual-purpose iron catalyst that catalyzes both glycosylation and dehydrogenation of formic acid, is also provided. 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 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.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

Multistage fractionation of pine bark by liquid and supercritical carbon dioxide was written by Barbini, Stefano;Jaxel, Julien;Karlstroem, Katarina;Rosenau, Thomas;Potthast, Antje. And the article was included in Bioresource Technology in 2021.Reference of 31566-31-1 The following contents are mentioned in the article:

Multistage fractionation of pine bark was performed using subcritical and supercritical CO2 at increasing pressures and temperatures In total, seven fractions were collected, which demonstrated different enrichments of families of compounds In particular, subcritical CO2 yielded 41% of the total extract in which unsaturated fatty acids represented the most abundant family. The subsequent five supercritical steps increased the recovery of sterol esters, wax esters and resin acids at higher temperatures and pressures, reaching 80% of the total extractable mass. In the last step, using ethanol as a co-solvent, an addnl. 20% of extract was recovered, which was enriched with phenolics and glycerol. A full characterization of the extracts was accomplished by high-temperature GC-MS/FID using four internal standards, which were representative of the main classes of compounds contained in the pine bark extract This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Reference of 31566-31-1).

Glyceryl monostearate (cas: 31566-31-1) 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.Reference of 31566-31-1

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Ester – Wikipedia,
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Development of encapsulated sage extract powder: Inter-comparison with commercially available powder for physical properties and metabolites composition was written by Naziruddin, M. A.;Kian, L. K.;Jawaid, M.;Aziman, N.;Yusof, N. L.;Abdul-Mutalib, N. A.;Sanny, M.;Fouad, Hassan;Tverezovskaya, O. A.. And the article was included in Journal of Supercritical Fluids in 2022.Synthetic Route of C21H44O5 The following contents are mentioned in the article:

Encapsulated Salvia officinalis L. powder (SESP) was developed from extract obtained by supercritical fluid extraction (SFE), and it was compared with com. sage powder of hydro-distillation extract (HESP). The optimized conditions of 30 MPa at 50°C for laboratory scale SFE extraction were found to generate the highest yield at 40.96 ± 0.84%. The conditions were later applied in the upscaled extraction, which yielded about 30.10 ± 1.33% extract Large particle size distribution at 118.46 ± 6.63μm for SESP was notified as compared to 66.80 ± 1.50μm for HESP. Outcomes of crystallog. anal. demonstrated that abundant metabolites from various groups existed in both powders. About 25 and 43 metabolites were identified by Gas Chromatog.-Mass Spectrometry (GC-MS) in HESP and SESP, resp. In HESP, organic acids were found to be the major group identified, while terpenoids were the largest group found in SESP. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Synthetic Route of C21H44O5).

Glyceryl monostearate (cas: 31566-31-1) 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.Synthetic Route of C21H44O5

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

A biocompatible supramolecular hydrogel with multivalent galactose ligands inhibiting Pseudomonas aeruginosa virulence and growth was written by Liu, Shengnan;Li, Hang;Zhang, Jikun;Tian, Xin;Li, Xinming. And the article was included in RSC Advances in 2020.Related Products of 604-69-3 The following contents are mentioned in the article:

In recent years, peptide self-assembly proved to be an efficient strategy to create complex structures or functional materials with nanoscale precision. In this work, we designed and synthesized a novel glycopeptide mol. with a galactose moiety through peptide galactosylation. Then relying on peptide self-assembling strategies, we created a supramol. hydrogel with multivalent galactose ligands on the surface of self-assembled nanofibers for mol. recognition and interactions. Because of multivalent galactose-LecA interactions, the self-assemblies of glycopeptide could target P. aeruginosa specifically, and acted as anti-virulence and antibacterial agents to inhibit biofilm formation and bacterial growth of P. aeruginosa. Moreover, in association with polymyxin B, a common antibiotic, the glycopeptide hydrogel exhibited a synergistic growth inhibition effect on biofilm colonization of P. aeruginosa. 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: 604-69-3Related Products 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 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.Related Products of 604-69-3

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

Enzyme-inducing effects of salicylate derivatives was written by Goudonnet, Herve;Mounie, Jacques;Bereksi-Reguig, K.;Truchot, Roger. And the article was included in Comptes Rendus des Seances de la Societe de Biologie et de Ses Filiales in 1982.Quality Control of 4-Acetamidophenyl 2-acetoxybenzoate The following contents are mentioned in the article:

Of the salicylate derivatives examined, salicylic acid  [69-72-7] itself, Me salicylate  [119-36-8], salicylazosulfapyridine  [599-79-1], 4-iodosalicylic acid  [16870-28-3], and acetylsalicylic acid  [50-78-2] appeared not to induce liver microsomal enzymes in rats, while salicylamide (I) [65-45-2] and benorylate (II) [5003-48-5] caused significant induction, and 3,5-diiodosalicylic acid (III) [133-91-5] was an extremely potent inducer. After 3 daily oral 125-mg/kg doses of III, for example, liver microsomal cytochrome P 450 activity was doubled. Structure-activity relations are briefly discussed. 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. 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. 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.Quality Control of 4-Acetamidophenyl 2-acetoxybenzoate

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

GC-MS analysis of phytochemicals, fatty acid profile, antimicrobial activity of gossypium seeds was written by Krishnaveni, Marimuthu;Dhanalakshmi, Ravi;Nandhini, Nagaraj. And the article was included in International Journal of Pharmaceutical Sciences Review and Research in 2014.HPLC of Formula: 1731-94-8 The following contents are mentioned in the article:

A major portion of cotton production is occupying textile industry. The seeds of cotton were selected for the present study to know its phytochem. components, fatty acids present and also its antimicrobial activity. According to our GC-MS results obtained for phytochem. anal., 9, 12, 15-Octadecatrienoic acid, (Z,Z,Z)- shows highest peak area percent and it is a unsaturated in nature. n-Hexadecanoic acid otherwise called palmitic acid is showing higher peak area percent and then followed by linoleic acid Et ester, 12-Methyl-E,E-2,13-octadecadien-1-ol and also found to contain c-Sitosterol, c-Tocopherol, Vitamin E in trace amount Likewise, among the fatty acids studied 9,12-Octadecadienoic acid (Z,Z)-, Hexadecanoic acid Me ester, 9,12-Octadecadienoic acid (Z,Z)-Me ester was found to be high. Traces of margaric acid Me ester were also observed along with other Me esters. It was found to be active in killing bacteria than fungi. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8HPLC of Formula: 1731-94-8).

Methyl nonadecanoate (cas: 1731-94-8) 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.HPLC of Formula: 1731-94-8

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

Effects of Elevated Temperature Postharvest on Color Aspect, Physiochemical Characteristics, and Aroma Components of Pineapple Fruits was written by Liu, Chuanhe;Liu, Yan. And the article was included in Journal of Food Science in 2014.Computed Properties of C20H40O2 The following contents are mentioned in the article:

In this work, 2 sep. experiments were performed to describe the influence of elevated temperature treatments postharvest on the color, physiochem. characteristics and aroma components of pineapple fruits during low-temperature seasons. The L* (lightness) values of the skin and pulp of pineapple fruits were decreased. The a* (greenness-redness) and b* (blueness-yellowness) values of the skin and pulp were all markedly increased. The elevated temperature significantly increased the contents of total soluble solids (TSS) and slightly affected contents of vitamin C (nonsignificant). Titratable acidity (TA) of pineapple fruits were notably decreased, whereas the values of TSS/TA of pineapple fruits were significantly increased. The firmness of the pineapple fruits decreased and more esters and alkenes were identified. The total relative contents of esters were increased, and the total relative contents of alkenes were decreased. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Computed Properties of C20H40O2).

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. 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.Computed Properties of C20H40O2

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

High-pressure liquid chromatographic evaluation of cyclic paracetamol-acetylsalicylate and its active metabolites with results of a comparative pharmacokinetic investigation in the rat was written by Marzo, A.;Quadro, G.;Treffner, E.;Ripamonti, M.;Meroni, G.;Lucarelli, C.. And the article was included in Arzneimittel-Forschung in 1990.Application In Synthesis of 4-Acetamidophenyl 2-acetoxybenzoate The following contents are mentioned in the article:

Like benorilate, its correlated open ester, MR 897 (I), a cyclic ester between acetylsalicylic acid and paracetamol, gives rise to acetylsalicylic acid, salicylic acid and paracetamol by enzymic hydrolysis. An anal. method was developed, which detects parent drugs and active metabolites, in order to compare the pharmacokinetic and metabolic behavior of the 2 products. The method was specifically validated for quant. anal. of salicylic acid and paracetamol, which are the main systemic metabolites of both MR 897 and benorilate. Extraction from rat plasma or tissue homogenate was carried out in 2 steps with Et₂O and Et acetate. Recovery of the anal. substances ranged from 82.7% for paracetamol to 98.5% for salicylic acid. The results of a comparative pharmacokinetic investigation of MR 897 and benorilate in the rat confirm higher bioavailability and a more favorable plasma level profile with MR 897. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Application In Synthesis of 4-Acetamidophenyl 2-acetoxybenzoate).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Application In Synthesis of 4-Acetamidophenyl 2-acetoxybenzoate

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

Total synthesis of ceramides and β-O-glucosylceramides via intramolecular fatty acyl group migration was written by Gorantla, Jaggaiah N.;Santhi, Maniganda;Hua, Yanling;Ketudat Cairns, James R.. And the article was included in New Journal of Chemistry in 2022.SDS of cas: 604-69-3 The following contents are mentioned in the article:

Acyl migration of alkyl and aromatic acyl groups from an alc. to another alc. or amine is a phenomenon that occurs in nature and can be a bane to some synthetic strategies. An acyl migration-dependent method was developed for the synthesis of ceramide and glucosyl ceramide derivatives, in which the desired fatty acyl moiety acts both as protecting and migrating group. Removal of the tetrachlorophthalimido (TCP) group with ethylenediamine as a mild base at room temperature resulted in subsequent intramol. fatty acyl group migration from -O to -N, on sphingosine or peracetylated glucosyl sphingosine to yield the desired N-acylated products. A deacetylation reaction afforded the desired β-O-glucosylceramide derivatives I (R = C₁₅H₃₁, C₁₇H₃₅). Thus, the choice of the appropriate blocking group turns acyl migration into a tool for synthesis, rather than an impediment. 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 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. 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.SDS of cas: 604-69-3

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

Formulation and bioavailability of benorilate tablets was written by Chen, J.;Tu, X. D.. And the article was included in Yaoxue Xuebao in 1994.Name: 4-Acetamidophenyl 2-acetoxybenzoate The following contents are mentioned in the article:

A new formulation tablet B was developed and compared with tablet A with the purpose of improving the bioavailability of benorilate by reducing its particle size. The dissolution rate in vitro was determined by paddle method and using surfactant solution medium. The plasma concentrations of hydrolyzates which are salicylic acid and paracetamol from benorilate in vivo were measured by HPLC. The dissolution rates of ground and unground drug are 0.0337 min^-1 and 0.0152 min^-1, resp. Compared with tablet A, the cumulative dissolution percentage of B is higher. The mean dissolution time of B and A are 15.77 min and 42.25 min, resp. The study in vivo showed that the C_max, T_p and AUC of salicylic acid for these two formulations have no significant difference. The relative bioavailability of B to A is 125.59%. Their in vivo process fits one-compartment model and first order elimination. 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 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.Name: 4-Acetamidophenyl 2-acetoxybenzoate

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