Tag: 200-300

Formylation of alcohols, using catalysts based on epoxides was written by Brewis, S.;Dent, W. T.;Smith, R. D.. And the article was included in Journal of the Chemical Society in 1965.SDS of cas: 1190-39-2 This article mentions the following:

The reaction ROH + CO â†?HCO₂R was found to be catalyzed by a mixture of an epoxide with a salt or with a Group V tertiary alkyl or aryl. Thus, MeOH containing NaOAc and ethylene oxide reacted with CO at 200 atm. and 130° to give MeO₂CH. Na salts of weak acids gave nearly the maximum possible reaction in 2.5 hrs., salts of divalent metals or strong acids were less effective. The salts in the catalyst mixture could be replaced by tertiary alkyl or aryl amines, phosphines, or arsines. The catalysts varied in activity with different alcs. but tert-BuOH did not react. In the Na-catalyzed reaction tert-BuOH reacted more readily than BuOH. Alkoxide ions were formed during the reaction. From a study of the reaction at room temperature between Ph₃P, ethylene oxide, and MeOH, it is suggested that the catalysts for the formylation reaction are bases of the type Ph₃P⁺CH₂CH₂OMe + MeO^–, formed by reaction between the alc., epoxide, and the tertiary base. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2SDS of cas: 1190-39-2).

malonic acid dibutyl ester (cas: 1190-39-2) 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.SDS of cas: 1190-39-2

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

Dithioesters and trithiocarbonates monolayers on gold was written by Fustin, Charles-Andre;Duwez, Anne-Sophie. And the article was included in Journal of Electron Spectroscopy and Related Phenomena in 2009.Computed Properties of C14H12S2 This article mentions the following:

Dithioester and trithiocarbonate compounds, used as chain transfer agents in reversible addition fragmentation chain transfer polymerization, form monolayers on gold. It is evidenced that the monolayers are slightly less dense than those formed by long alkanethiols on gold, but show a surface coverage that is close to the one obtained for short alkanethiols. Since the grafting d. of polymer brushes is limited by the steric hindrance which inhibits the diffusion of large free polymer chains to open-surface reactive sites, the relatively high grafting d. of dithioesters and trithiocarbonates anchoring groups is not expected to limit the d. of the brushes. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Computed Properties of C14H12S2).

Benzyl benzodithioate (cas: 27249-90-7) 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.Computed Properties of C14H12S2

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

Preparative synthesis of 1,2-propylene glycol acetals of 3-alkoxy-4-acyloxybenzaldehydes was written by Beresnevich, L. B.;Moiseichuk, K. L.;Zhukovskaya, N. A.;Dikusar, E. A.. And the article was included in Russian Journal of Applied Chemistry in 2010.Application of 20665-85-4 This article mentions the following:

The synthesis of 1,2-propylene glycol acetals of 3-alkoxy-4-acyloxybenzaldehydes by condensation of 3-alkoxy-4-acyloxybenzaldehydes with 1,2-propylene glycol in boiling benzene in the presence of the FIBAN K-1 sulfonic cation-exchange resin is reported. In the experiment, the researchers used many compounds, for example, 4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4Application of 20665-85-4).

4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4) 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 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.Application of 20665-85-4

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

GC-MS and HPLC profiles of phenolic fractions of the leaf of Telfairia occidentalis was written by Eseyin, Olorunfemi A.;Sattar, Munavvar A.;Rathore, Hassaan A.;Aigbe, Flora;Afzae, Sheryar;Ahmad, Ashfaq;Lazhari, Mohammed;Akthar, Safia. And the article was included in Pakistan Journal of Pharmaceutical Sciences in 2018.Application In Synthesis of Dimethyl decanedioate This article mentions the following:

Telfairia occidenlalis possesses high antioxidant activity. However, the antioxidant components of the plant have not yet been identified. This study was undertaken to identify the phenolies in the leaf of the plant. Extract and fractions of the leaf of the plant were analyzed using the HPLC and GCMS. HPLC anal. revealed the presence of gallic acid (22.19μg/mg), catechin (29.17μ/mg), caffeic acid (9.17μg/mg), ferulic acid (0.94μg/mg), sinapic acid (1.91μg/mg) and 4-hydroxy benzoic acid (43.86μg/mg) in the aqueous extract Phenolics fraction contained gallic acid (0.88μ/mg), catechin (2.70μ/mg), caffeic acid (7.92μg/mg), ferulic acid (2.72μg/mg), benzoic acid (6.36μg/mg), p-coumaric acid (1.48μg/mg), quercetin (12.00μg/mg). Only caffeic acid (2.50μg/mg), ferulic acid (0.44μg/mg) and quercetin (8.50μg/mg) were detected in the flavonoid fraction. While GCMS anal. showed the presence of methylparaben; ethylparaben; benzoic acid; 4-hydroxy-2-methoxy-3,5,6-trimethyl-, Me ester; 4-hydroxy-3-methoxy; phenol, 5-methoxy-2-(methoxymethyl)-; phenol, 5-methoxy-2, 3-dimethyl; and phenol, 2-(2-benzothiazolyl)-. This study is the first to reveal the identity of some phenolics components of the leaf of Telfairia occidentalis. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Application In Synthesis of Dimethyl decanedioate).

Dimethyl decanedioate (cas: 106-79-6) 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.Application In Synthesis of Dimethyl decanedioate

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

Regioselective Synthesis of N²-Aryl 1,2,3-Triazoles via Electro-oxidative Coupling of Enamines and Aryldiazonium Salts was written by Baidya, Mrinmay;Mallick, Samrat;De Sarkar, Suman. And the article was included in Organic Letters in 2022.Quality Control of Ethyl 3-oxo-3-(m-tolyl)propanoate This article mentions the following:

An efficient synthetic route for the construction of N²-aryl 1,2,3-triazoles I (R = Me, cyclopropyl, 4-chlorophenyl, thiophen-2-yl, etc.; R¹ = COOMe, COOEt, C(O)Me; Ar = Ph, 3-chlorophenyl, 2,4,6-trimethylphenyl, etc.) is reported via sequential C-N bond formation and electro-oxidative N-N coupling under metal-free conditions. Readily accessible 2-aminoacrylates NH₂RC=CHCOOR¹ and aryldiazonium salts ArN₂⁺BF₄^– were used as starting materials, and the developed protocol displays excellent functional group tolerance, allowing an extensive range of substrate scope up to 91% isolated yield. Various mechanistic studies, along with the isolation of an intermediate adduct, refer to successive ionic and radical reaction sequences. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Quality Control of Ethyl 3-oxo-3-(m-tolyl)propanoate).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) 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 Ethyl 3-oxo-3-(m-tolyl)propanoate

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

Depolymerization mechanism of alkali lignin in sub- and supercritical ethanol was written by Chen, Meng-wei;Guo, Da-liang;Wang, Lin-fang;Xue, Guo-xin. And the article was included in Ranliao Huaxue Xuebao in 2016.Safety of Dimethyl decanedioate This article mentions the following:

The depolymerization process of wheat straw alkali lignin in sub- and supercritical ethanol was investigated with a micro autoclave reactor. The degraded product properties and the depolymerization mechanism of lignin structure were studied by SEM (SEM), gas chromatog./mass spectrometry (GC/MS) and IR spectroscopy (FT-IR). The exptl. results showed that the min. residual char yield (16.5%) was obtained at the condition of ethanol supercritical point (240°C, 7.2 MPa). Under subcritical ethanol conditions, alkali lignin firstly melted and dispersed in ethanol as 1.0-2.0 μm diameter of microspheres, then a small amount of ether linkages and benzene ring side chain C_α were broken to form phenols, esters, ketones and acids products. Under supercritical ethanol conditions, the diameter of molten microsphere was significantly reduced, and plenty of ether linkages and benzene ring side chain C_α were continuously broken, meanwhile, the lipid products were subjected to secondary decomposition reaction. The yield of lipid was decreased (11.94%), while the yield of phenolic products from depolymerization was increased (52.14%). In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Safety of Dimethyl decanedioate).

Dimethyl decanedioate (cas: 106-79-6) 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. 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 Dimethyl decanedioate

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

Polyacetylenic compounds. CLVII. Components of Coreopsis nuecensis was written by Bohlmann, Ferdinand;Zdero, Christa. And the article was included in Chemische Berichte in 1968.Synthetic Route of C12H14O4 This article mentions the following:

5-(3-Acetoxy-1-propynyl)-2-phenylthiophene (I), 3,4-(MeO)(Me2CHCO2)C6H3CH(O2CCHMe2)CH:CH2 (II), 3,4-(MeO)(Me2CHCO2)C6H3CH(OAc)CH:CH2, cis-1′,2′-epoxyconiferyl alc. diisobutyrate (III) and cis-1′,2′-epoxy-3′-O-(2-methylbutyryl)-4-O-isobutyrylconiferyl alc. were isolated from C. nuecensis roots, in addition to the known C2H2 derivatives Syntheses were carried out for I, II, and III. In the experiment, the researchers used many compounds, for example, 4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4Synthetic Route of C12H14O4).

4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4) 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.Synthetic Route of C12H14O4

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

Organic dye photocatalyzed α-oxyamination through irradiation with visible light was written by Liu, Hongjun;Feng, Wei;Kee, Choon Wee;Zhao, Yujun;Leow, Dasheng;Pan, Yuanhang;Tan, Choon-Hong. And the article was included in Green Chemistry in 2010.HPLC of Formula: 33166-79-9 This article mentions the following:

Rose Bengal, an organic dye, was used as a visible light photocatalyst to study novel α-oxyamination reactions between 1,3-dicarbonyl compounds and a free radical (TEMPO). Compounds that are difficult to obtain such as quaternary fluorinated compounds were synthesized using this method. This visible light photocatalytic reaction can also be performed in H₂O. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9HPLC of Formula: 33166-79-9).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) 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. 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: 33166-79-9

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

Importance of a reversible reaction for the synthesis of telechelic polymers by means of polycondensation using an excess of one monomer was written by Katoh, Takayoshi;Suzuki, Tomoya;Ohta, Yoshihiro;Yokozawa, Tsutomu. And the article was included in Polymer Chemistry in 2022.Electric Literature of C12H22O4 This article mentions the following:

We show that reversible polycondensation through an alkoxide-catalyzed ester-ester exchange reaction is an effective strategy for the synthesis of telechelic polymers free from contamination with cyclic polymers in the polycondensation of difunctional nucleophilic monomers and difunctional electrophilic monomers. Polycondensation of excess diol formate 1 and 1.0 equivalent of di-Me dicarboxylate 2 at high monomer concentrations afforded polyesters with a hydroxyl group at both ends, uncontaminated with cyclic polymers. On the other hand, the polycondensation of 1.0 equivalent of 1 and excess 2 selectively afforded polymers with a Me ester moiety at both ends, even at lower monomer concentrations Under the same conditions, the irreversible polycondensation of a diol and diacid chloride invariably afforded cyclic polymers, as well as telechelic polymers end-capped with the excess monomer. These results indicated that cyclic polymers, formed during reversible polycondensation, are converted into telechelic polymers by an ester-ester exchange reaction of the cyclic polymers with the excess monomer. Furthermore, the polycondensation of equimolar 1 and 2 in the presence of a sym. ester mol. having two functional groups as an exchange reagent (ExR) afforded a variety of telechelic polyesters with the functional groups derived from the ExR at both ends. Notably, when bis[poly(ethylene glycol) (PEG)] isophthalate was used as the ExR, a PEG-b-polyester-b-PEG triblock copolymer was obtained. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Electric Literature of C12H22O4).

Dimethyl decanedioate (cas: 106-79-6) 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. 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. Electric Literature of C12H22O4

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

Synthesis of E-3-alkoxy-4-hydroxy(alkoxy, acyloxy)phenylmethylene(2-hydroxyphenyl)amines was written by Dikusar, E. A.;Potkin, V. I.;Kozlov, N. G.. And the article was included in Russian Journal of General Chemistry in 2008.Electric Literature of C12H14O4 This article mentions the following:

Condensation of vanillin or vanillal derivatives with 2-aminophenol gave E isomers of azomethines (Schiff bases) containing hydroxy, ether, and ester groups. Under optimized conditions, high yields of E isomers of the Schiff bases were obtained and the cyclocondensation products were excluded. Quantum chem. calculations of some of the formation heat of E and Z configurations were carried out. In the experiment, the researchers used many compounds, for example, 4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4Electric Literature of C12H14O4).

4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4) 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. 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.Electric Literature of C12H14O4

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