Month: December 2022

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

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

Anionic polymerization of fluorine-containing vinyl monomers. 6. Polymerizations of fluoroalkyl acrylates and methacrylates initiated by organoaluminum compounds was written by Narita, Tadashi;Hagiwara, Tokio;Hamana, Hiroshi;Miyasaka, Takehiko;Wakayama, Akira;Hotta, Tetsuo. And the article was included in Makromolekulare Chemie in 1987.Name: 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate The following contents are mentioned in the article:

The anionic polymerizations of 2,2,2-trifluoroethyl acrylate (I), 2,2,2-trifluoroethyl methacrylate (II), 2,2,2-trifluoro-1-trifluoromethylethyl acrylate, and 2,2,2-trifluoro-1-trifluoromethylethyl methacrylate (III) were examined with Et₃Al and diethylaluminum active methylene chelate compounds as initiators. III was polymerized with Et₃Al. Diethyl(Et cyanoacetato)aluminum produced polymers of I and II. Diethyl(acetylacetonato)aluminum and diethyl(di-Me malonato)aluminum, however, showed low reactivity towards these 4 monomers. The resulting polymers showed unimodal mol. weight distribution with number-average mol. weights of 10⁴-10⁵, measured by gel chromatog. The initiation reaction and the copolymerization reactivity with styrene supported the anionic polymerization mechanism. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Name: 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. 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: 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate

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

Esterification of Tertiary Amides by Alcohols Through C-N Bond Cleavage over CeO₂ was written by Toyao, Takashi;Nurnobi Rashed, Md.;Morita, Yoshitsugu;Kamachi, Takashi;Hakim Siddiki, S. M. A.;Ali, A. Md.;Touchy, A. S.;Kon, Kenichi;Maeno, Zen;Yoshizawa, Kazunari;Shimizu, Ken. And the article was included in ChemCatChem in 2019.Recommanded Product: 5444-75-7 The following contents are mentioned in the article:

CeO₂ was found to promote ester forming alcoholysis reactions of tertiary amides. The present catalytic system was operationally simple, recyclable and it does not require additives. The esterification process displayed a wide substrate scope (>45 examples; up to 93 % isolated yield). Results of a d. functional theory (DFT) study combined with in-situ FT-IR observations indicated that the process proceeded through rate limiting addition of a CeO₂ lattice oxygen to the carbonyl group of the adsorbed acetamide species with energy barrier of 17.0 kcal/mol. This value matched well with exptl. value (17.9 kcal/mol) obtained from anal. of the Arrhenius plot. Further studies by in-situ FT-IR and temperature programmed desorption using probe mols. demonstrated that both acidic and basic properties were important and consequently, CeO₂ showed the best performance for the C-N bond cleavage reaction. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 5444-75-7).

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. 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.Recommanded Product: 5444-75-7

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

Impact of UV-C treatment and thermal pasteurization of grape must on sensory characteristics and volatiles of must and resulting wines was written by Golombek, Patricia;Wacker, Michael;Buck, Nina;Durner, Dominik. And the article was included in Food Chemistry in 2021.SDS of cas: 2198-61-0 The following contents are mentioned in the article:

UV-C treatment is a commonly known technique to inactivate microorganisms. The objective of this work was to investigate the impact of UV-C treatment of grape must on the sensory characteristics of the resulting wine and on the profile of volatile compounds of grape must and wine. Different UV-C doses were applied to Riesling must and compared with thermal pasteurization. The sensory off-flavor “ATA” and a content of 0.5μg/L 2-aminoacetophenone were determined in the grape must and in the resulting wine after UV-C treatment with a high dose of 21 kJ/L. Sensory off-flavors did neither occur after thermal pasteurization nor after UV-C treatment with a dose of 2 kJ/L, which is sufficient for the inactivation of microorganisms. Minor changes in the volatiles’ profiles of grape must and wine, involving e.g. terpenes and C13-norisoprenoids, occurred in musts treated with thermal pasteurization as well as with a UV-C dose of 2 kJ/L. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0SDS of cas: 2198-61-0).

Isopentyl hexanoate (cas: 2198-61-0) 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. 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. SDS of cas: 2198-61-0

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

Effect of high hydrostatic pressure on pasting properties, volatile flavor components, and water distribution of cooked black rice was written by Meng, Ling;Zhang, Wencheng;Hui, Ailing;Wu, Zeyu. And the article was included in Journal of Food Processing and Preservation in 2020.Category: esters-buliding-blocks The following contents are mentioned in the article:

The effect of high hydrostatic pressure (HHP) on pasting properties, volatile flavor components, and water distribution of cooked black rice (BR) was investigated. BR samples were subjected to HHP treatments at 200, 300, 400, and 500 MPa for 15 min, and then cooked for further evaluation. Results showed that HHP-treated samples exhibited lower viscosity compared to the control group, with the lowest value at 500 MPa. Among 126 flavor compounds identified in cooked BR stored for 7 days, the total contents of three key flavor components (alcs., ketones, and aldehydes) were greatly enhanced, indicating that HHP contributed to the aroma quality of cooked BR. Water characteristics were determined by low-field NMR (LF-NMR), and three water fractions were detected and identified as T21, T22, and T23. The value of T21 gradually decreased with the increase of pressure, suggesting that HHP reduced the retrogradation degree of cooked BR. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Category: esters-buliding-blocks).

Octyl acetate (cas: 112-14-1) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Category: esters-buliding-blocks

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

Identification of odorous constituents of southern yellow pine and China fir wood: the effects of extractive removal was written by Liu, Ru;Wang, Chen;Huang, Anmin;Lv, Bin. And the article was included in Analytical Methods in 2018.Quality Control of 2-Ethylhexyl benzoate The following contents are mentioned in the article:

In this study, the odors of two types of softwood species, namely southern yellow pine (Pinus spp.) and China fir (Cunninghamia lanceolata (Lamb.) Hook.), were identified and extracted with ethanol-toluene for the removal of extractives. The odorous components of neat and extracted wood were identified via gas chromatog.-mass spectrometry/olfactometry (GC-MS/O). The results showed that about 40 key identified volatile compounds (peak area above 0.2%) were detected from the GC-MS data, and more than 50 kinds of odorants were identified using GC-O. The time concentrated on was from 15 to 33 min for GC-O, which was different to the time concentrated on for GC-MS. The amounts of both volatile compounds and odorants in pine were more than in fir. After extraction, the amounts and intensities of some odorants decreased, while some remained. However, the extraction process resulted in benzene residue and led to increased benzene odor. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Quality Control of 2-Ethylhexyl benzoate).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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.Quality Control of 2-Ethylhexyl benzoate

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

The composition of the aroma of Serapias orchids in Basilicata (Southern Italy) was written by D’Auria, Maurizio;Lorenz, Richard;Mecca, Marisabel;Racioppi, Rocco;Romano, Vito Antonio. And the article was included in Natural Product Research in 2021.Safety of 2-Ethylhexyl benzoate The following contents are mentioned in the article:

The SPME-GC-MS anal. of the aroma components of Serapias cordigera, Serapias cordigera subsp. lucana, Serapias vomeracea, Serapias lingua, and Serapias parviflora were reported. The relevant components of the scent of Serapias cordigera were α-amorphene, Et oleate, heneicosane, heptadecane, 2-heptadecanone, Et elaidate, pentadecane, octadecane, farnesylacetaldehyde, nonadecane, and Et stearate. Serapias cordigera subsp. lucana gave α-amorphene, pentadecane, Pr undecanoate, heptadecane, Et elaidate and oleate, Et stearate, and 8-heptadecene. Serapias vomeracea showed pentadecane, 5-nonadecene, 1-nonadecene, 3-heptadecene, benzyl benzoate, 2-undecanone, and octadecane. Serapias lingua showed the presence of heptadecane, 3-heptadecene, iso-Pr myristate, pentadecane, nonadecane, iso-Pr palmitate, octadecane, and benzyl benzoate. Serapias parviflora gave pentadecane, pentadecene, hexadecane, heptadecane, nonadecane, and Et elaidate. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Safety of 2-Ethylhexyl benzoate).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. 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.Safety of 2-Ethylhexyl benzoate

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

New Kind of Lignin/Polyhydroxyurethane Composite: Green Synthesis, Smart Properties, Promising Applications, and Good Reprocessability and Recyclability was written by Zhao, Wei;Liang, Zhenhua;Feng, Zihao;Xue, Bailiang;Xiong, Chuanyin;Duan, Chao;Ni, Yonghao. And the article was included in ACS Applied Materials & Interfaces in 2021.Application In Synthesis of Diphenyl carbonate The following contents are mentioned in the article:

A new kind of biobased material named lignin-containing polyhydroxyurethane (LPHU) is prepared from bis(6-membered cyclic carbonate) (BCC), dimer fatty diamine, and lignin for the first time. The preparation strategy is isocyanate-free, solvent-free, and catalyst-free, representing a green and environmentally friendly method to access polyurethane (PU)/lignin composites. The resultant LPHUs possess dual networks: a dynamic covalent network and a hydrogen bonding network, exhibiting superior mech. strength, high thermal stability, excellent reprocessability/recyclability, and smart properties such as shape memory and self-healing. Potential application investigations indicate that the resultant LPHUs can be not only used for smart packaging label fabrication for heat-sensitive commodities but also further combined with natural cellulose paper to prepare paper-based electromagnetic shielding materials with high mech. performance. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Application In Synthesis of Diphenyl carbonate).

Diphenyl carbonate (cas: 102-09-0) 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. 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.Application In Synthesis of Diphenyl carbonate

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