Tag: 100-200

Design, synthesis and fungicidal activity of novel strobilurin-1,2,4-triazole derivatives containing furan or thiophene rings was written by Liu, Yang;Liu, Ming;Zhang, Dongkai;Hua, Xuewen;Wang, Baolei;Zhou, Sha;Li, Zhengming. And the article was included in Chemical Research in Chinese Universities in 2016.Safety of Isopropylisothiocyanate The following contents are mentioned in the article:

A series of strobilurin-1,2,4-triazole derivatives containing a furan or thiophene ring I (R¹ = H, Br; R² = Me, i-Pr, Ph, Bn, etc.; X = O, S) was designed and synthesized. The bioassays indicated that the fungicidal activities of compounds I [R¹ = H, R² = Et, X = O (II)] (EC₅₀ = 14.82 mg/L) and I [R¹ = H, R² = i-Pr, X = O (III)] (EC₅₀ = 18.72 mg/L) against Cercospora arachidicola Hori in vitro were much higher than that of Azoxystrobin as control (EC₅₀ = 40.54 mg/L) and the fungicidal activities of compounds I (R¹ = H, R² = i-Bu, X = S) (EC₅₀ = 8.66 mg/L) and I [R¹ = Br, R² = n-Bu, X = O (IV)] (EC₅₀ = 9.89 mg/L) against Rhizoctonia cerealis in vitro were higher than that of the same control (EC₅₀ = 10.86 mg/L). Compounds I (R¹ = Br, R² = i-Pr, X = O), II, III, and IV could be considered as the leading compounds for further investigation. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Safety of Isopropylisothiocyanate).

Isopropylisothiocyanate (cas: 2253-73-8) 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. 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. Safety of Isopropylisothiocyanate

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

Evaluation of germination effect on volatile compounds of different faba bean cultivars using HS-SPME/GC-MS was written by Rajhi, Imene;Baccouri, Bechir;Rajhi, Fatma;Hammami, Jamila;Souibgui, Monia;Amri, Moez;Mhadhbi, Haythem;Flamini, Guido. And the article was included in Journal of Food Composition and Analysis in 2022.Category: esters-buliding-blocks The following contents are mentioned in the article:

The effect of germination on flavor attributes of six Vicia faba L. cultivars (Najeh, Saber, Chourouk, Local, Bachar and Badii) was assessed using HS-SPME/GC-MS technique. Of all aroma compounds identified, 37 were emitted by unsprouted (19) and sprouted (28) seeds. However, 32 active odors were characterized in the flours obtained from unsprouted (18) and sprouted (28) grains. The total identification percentages of the volatiles ranged from 94.2% to 99.9%. The volatiles were classified into five chem. classes i.e., monoterpene hydrocarbons (MH), oxygenated monoterpenes (OM), sesquiterpene hydrocarbons (STH), apocarotenes (AP), and non-terpene derivatives (NTD). Germination induced the formation of OM, increased NTD, and decreased MH in sprouted seeds, with the sole exception of the Najeh cultivar. In flours, the most representative chem. classes was NTD followed by MH, again with the exception of the for Najeh cultivar, which emitted much more STH. In addition, an increase in beany flavors in sprouted faba beans has been noted. The milling reduced the percentage of nonanal, considered one of the beany flavors of faba beans. However, when the germinated seeds were minced, a new beany flavor constituent appeared, 2-pentyl furan. 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. 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.Category: esters-buliding-blocks

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

Recent advances in aliphatic moisture cure urethane coatings was written by Squiller, Edward P.;Best, Kurt. And the article was included in PMSE Preprints in 2010.Name: Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

To apply a defect free polyurethane moisture cure coating, requires the consideration of several factors: choice of nonfunctional thermoplastic acrylic resin, solvents, catalyst level and applied % NCO content. And within these factors there is a synergy that incrementally builds to make a more robust defect free polyurethane moisture cure coating at increased film thicknesses. The central characteristic when considering these factors ultimately relates back to speed of cure. Since the evolution of CO2 in the curing process of polyurethane moistures cure is inevitable, the coating must be formulated to retain its flow and leveling as long as possible while still resulting in overnight cure. This is accomplished by choosing an acrylic grinding resin with a high acid number and lower mol. weight This resin helps de-water the pigments and additives used in moisture cure formulation. The final steps in formulating a defect free moisture cure polyurethane coating are to use low levels of catalyst and a low applied % NCO prepolymer. These factors, combined in this manner result in a moisture cure coating that is applied at thicknesses that are double the current state of the art in aliphatic moisture cure coatings on the market today. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Name: Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) 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: Ethyl 3-ethoxypropanoate

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

Field induced fragmentation spectra from reactive stage-tandem differential mobility spectrometry was written by Fowler, P. E.;Pilgrim, J. Z.;Lee, G.;Eiceman, G. A.. And the article was included in Analyst (Cambridge, United Kingdom) in 2020.Related Products of 112-14-1 The following contents are mentioned in the article:

A planar tandem differential mobility spectrometer was integrated with a middle reactive stage to fragment ions which were mobility selected in a first analyzer stage using characteristic compensation and separation fields. Fragmentation occurred in air at ambient pressure of 660 Torr (8.8 kPa) with elec. fields of 10 to 35 kV cm^-1 (E/N of 52 to 180 Td) between two 1 mm wide metal strips, located on each analyzer plate between the first and second mobility stages. Field induced fragmentation (FIF) spectra were produced by characterizing, in a last stage, the mobilities of fragment ions from protonated monomers of 43 oxygen-containing volatile organic compounds from five chem. classes. The extent of fragmentation was proportional to E/N with alcs., aldehydes, and ethers undergoing multiples steps of fragmentation; acetates fragmented only to a single ion, protonated acetic acid. In contrast, fragmentation of ketones occurred only for Me i-Bu ketone and 2-hexanone. Fragment ion identities were supported by mass-anal. and known fragmentation routes and suggested that field induced fragmentation at ambient pressure can introduce structural information into FIF spectra, establishing a foundation for chem. identification using mobility methods. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Related Products of 112-14-1).

Octyl acetate (cas: 112-14-1) 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. 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.Related Products of 112-14-1

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

Structural characterization and aquatic toxicity prediction of esters was written by Li, Jian-Feng;Liao, Li-Min. And the article was included in Chinese Journal of Structural Chemistry in 2021.Recommanded Product: Methyl heptanoate The following contents are mentioned in the article:

Based on the three-dimensional structures of the compounds, the structures of 48 ester compounds were expressed parametrically. Through multiple linear regression and partial least-squares regression, the relationship models between ester compound structures and aquatic toxicity log(1/IGC50) were established. The correlation coefficients (R2) of the models were 0.9974 and 0.9940, and the standard deviations (SD) were 0.0469 and 0.0646, resp. The stability of the models was evaluated by the leave-one-out internal cross-test. The correlation coefficients (RCV2) of the models of interactive tests were 0.9939 and 0.8952, and the standard deviation (SDCV) was 0.0715 and 0.0925, resp. The external samples were used to test the predictive ability of the models, and the correlation coefficients (Rtest2) of the external predictions were 0.9955 and 0.9955, and the standard deviations (SDtest) were 0.0720 and 0.0716, resp. The mol. structure descriptors could successfully represent the structural characteristics of the compounds, and the built models had good fitting effects, strong stability and high prediction accuracy. The present study has a good reference value for the study of the structure-toxicity relationship of toxic compounds in the environment. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Recommanded Product: Methyl heptanoate).

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. 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: Methyl heptanoate

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

Structural characterization and aquatic toxicity prediction of esters was written by Li, Jian-Feng;Liao, Li-Min. And the article was included in Chinese Journal of Structural Chemistry in 2021.SDS of cas: 112-14-1 The following contents are mentioned in the article:

Based on the three-dimensional structures of the compounds, the structures of 48 ester compounds were expressed parametrically. Through multiple linear regression and partial least-squares regression, the relationship models between ester compound structures and aquatic toxicity log(1/IGC50) were established. The correlation coefficients (R2) of the models were 0.9974 and 0.9940, and the standard deviations (SD) were 0.0469 and 0.0646, resp. The stability of the models was evaluated by the leave-one-out internal cross-test. The correlation coefficients (RCV2) of the models of interactive tests were 0.9939 and 0.8952, and the standard deviation (SDCV) was 0.0715 and 0.0925, resp. The external samples were used to test the predictive ability of the models, and the correlation coefficients (Rtest2) of the external predictions were 0.9955 and 0.9955, and the standard deviations (SDtest) were 0.0720 and 0.0716, resp. The mol. structure descriptors could successfully represent the structural characteristics of the compounds, and the built models had good fitting effects, strong stability and high prediction accuracy. The present study has a good reference value for the study of the structure-toxicity relationship of toxic compounds in the environment. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1SDS of cas: 112-14-1).

Octyl acetate (cas: 112-14-1) 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. 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.SDS of cas: 112-14-1

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

Volatile Compounds Determined by SPME-GC, Bioactive Compounds, In Vitro Antioxidant Capacity and Physicochemical Characteristics of Four Native Fruits from South America was written by da Silva, Aline Priscilla Gomes;Spricigo, Poliana Cristina;Purgatto, Eduardo;de Alencar, Severino Matias;Jacomino, Angelo Pedro. And the article was included in Plant Foods for Human Nutrition in 2019.Recommanded Product: 106-73-0 The following contents are mentioned in the article:

The aim of the present study was to identify volatile organic compounds (VOCs) by SPME-GC and quantify the bioactive compounds (ascorbic acid, total flavonoids and total phenolic content), antioxidant capacity (DPPH and ORAC) and physicochem. characteristics of ocorocillo, cambuca, murici da praia and murici do campo, four native South American fruits. A total of 41 volatile compounds were identified in ocorocillo, of which 17 were terpenes. Cambuca’s volatile profile contained aldehydes, aromatic hydrocarbons and alcs. Murici da praia and murici do campo contained high levels of fatty acid volatiles and esters, that contribute to their remarkable aroma. Ocorocillo contained high levels of ascorbic acid and total flavonoids, while presented lower ascorbic acid, flavonoid and phenolic levels. Murici da praia and murici do campo contained high amounts of phenolic compounds and high free-radical scavenging capacity (DPPH and ORAC). In addition, this fruit was sweeter and less acid compared to the other assessed fruits. The results suggest that these native fruits constitute a good source of volatile compounds and bioactive compounds, which may aid in their preservation interest and potential use in the food, cosmetic and pharmaceutical industries. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Recommanded Product: 106-73-0).

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

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

Durability of rubberized asphalt binders containing waste cooking oil under thermal and ultraviolet aging was written by Lei, Lyu;Pei, Jianzhong;Hu, Dongliang;Fini, Elham H.. And the article was included in Construction and Building Materials in 2021.SDS of cas: 106-73-0 The following contents are mentioned in the article:

Thermal oxidation and UV exposure contribute to major changes in the physicochem. and rheol. properties of asphalt binder, leading to the deterioration of pavements. This paper investigates the merits of grafting bio-derived mols. onto particles of crumb rubber to create bio-modified rubberized asphalt binder with enhanced resistance to thermal aging and UV aging. The bio-modification of the crumb rubber was made via a hybrid process where mols. of waste cooking oil were grafted to rubber with the help of microwave radiation. The evolution of bio-modified rubberized asphalt during thermal aging and UV aging was then characterized and compared with those of conventional rubberized asphalt. Study results showed biomodification was effective to delay both thermal aging and UV aging. However, the effectiveness varied with the type of aging with the resistance to thermal aging being enhanced by 35%-84% and the resistance to UV aging being enhanced by 34-106%. Overall, the synergy between waste cooking oil, crumb rubber, and asphalt binder led to a significant improvement in the resistance against aging, thereby promoting sustainability in construction while making use of two waste streams including waste cooking oil and crumb rubber from scrap tire. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0SDS of cas: 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. 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.SDS of cas: 106-73-0

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

Cultivable microbial ecology and aromatic profile of “mothers” for Vino cotto wine production was written by Battistelli, Noemi;Perpetuini, Giorgia;Piva, Andrea;Pepe, Alessia;Sidari, Rossana;Wache, Yves;Tofalo, Rosanna. And the article was included in Food Research International in 2021.COA of Formula: C7H14O3 The following contents are mentioned in the article:

The aim of the present study was to assess the cultivable microbiota of “mothers” of Vino cotto collected from production of different years 1890, 1895, 1920, 1975, 2008. A total of 73 yeasts and 81 bacteria were isolated. Starmerella lactis-condensi, Starmerella bacillaris, Hanseniaspora uvarum, Saccharomyces cerevisiae, Hanseniaspora guillermondi and Metschnikowia pulcherrima were identified. Bacteria isolates belonged to lactic acid bacteria (Lactiplantibacillus plantarum and Pediococcus pentosaceus) and acetic acid bacteria (Gluconobacter oxydans). Remarkable biodiversity was observed for Starm. bacillaris, as well as L. plantarum and G. oxydans. Organic acids and volatile compounds were also determined Malic and succinic acids were the main ones with values ranging from 8.49 g/L to 11.76 g/L and from 4.15 g/L to 7.73 g/L resp., while citric acid was present at low concentrations (<0.2 g/L) in all samples. Esters and higher alcs. were the main volatile compounds detected followed by alkanes. This study permits to better understand the microbial communities associated to this product and could be considered a starting point for the definition of tailored starter cultures to improve the quality of Vino cotto preserving its typical traits. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9COA of Formula: C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) 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.COA of Formula: C7H14O3

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

A stoichiometric solvent-free protocol for acetylation reactions was written by Valentini, Francesca;Galloni, Pierluca;Brancadoro, Diana;Conte, Valeria;Sabuzi, Federica. And the article was included in Frontiers in Chemistry (Lausanne, Switzerland) in 2022.SDS of cas: 112-14-1 The following contents are mentioned in the article:

Considering the remarkable relevance of acetylated derivatives of phenols, alcs., and aryl and alkyl thiols in different areas of biol., as well as in synthetic organic chem., a sustainable solvent-free approach to perform acetylation reactions is proposed here. Acetylation reactions are classically performed using excess of acetic anhydride (Ac2O) in solvent-free conditions or by eventually working with stoichiometric amounts of Ac₂O in organic solvents; both methods require the addition of basic or acid catalysts to promote the esterification. Therefore, they usually lead to the generation of high amounts of wastes, which sensibly raise the E-factor of the process. With the aim to develop a more sustainable system, a solvent-free, stoichiometric acetylation protocol is, thus, proposed. The naturally occurring phenol, thymol, can be converted to the corresponding-biol. active-ester with good yields, in the presence of 1% of VOSO₄. Interestingly, the process can be efficiently adopted to synthesize other thymyl esters, as well as to perform acetylation of alcs. and aryl and alkyl thiols. Remarkably, a further improvement has been achieved replacing Ac₂O with its greener alternative, isopropenyl acetate (IPA). This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1SDS of cas: 112-14-1).

Octyl acetate (cas: 112-14-1) 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. 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.SDS of cas: 112-14-1

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