Tag: 200-300

Synthesis of polyester by means of polycondensation of diol ester and dicarboxylic acid ester through ester-ester exchange reaction was written by Katoh, Takayoshi;Ogawa, Yukiko;Ohta, Yoshihiro;Yokozawa, Tsutomu. And the article was included in Journal of Polymer Science (Hoboken, NJ, United States) in 2021.COA of Formula: C12H22O4 This article mentions the following:

Based on our finding that the ester-ester exchange reaction between Bu benzoate and Et 4-phenylbenzoate in the presence of a metal alkoxide is faster than the ester-alc. exchange reaction of Bu benzoate and ethanol, we investigated the synthesis of polyester through ester-ester exchange reaction under various conditions. The polycondensation of diol formate and Me dicarboxylate in the presence of a catalytic amount of potassium tert-butoxide (tBuOK) in diglyme at 120°C under reduced pressure (90-100 Torr) afforded high-mol.-weight polyesters. Me dicarboxylate containing an amino group could be used for this polycondensation, although the corresponding diacid chloride containing an amino group was not isolable. The ester-ester exchange reaction could proceed even at the polyester backbone, and the reaction of poly(1,12-dodecamethylene isophthalate) (PEs1) with poly(ε-caprolactone) (PCL) in the presence of tBuOK at 140°C afforded a copolymer PEs1-stat-PCL, the structure of which was confirmed by ¹³C NMR spectroscopy and DSC thermal anal. A similar copolymer was also obtained by the polycondensation of dodecane-1,12-diol formate and di-Me isophthalate in the presence of PCL and tBuOK at 120°C under reduced pressure. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6COA of Formula: C12H22O4).

Dimethyl decanedioate (cas: 106-79-6) 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. COA of Formula: C12H22O4

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

Surfactant properties of alternating amphiphilic copolymers of N-vinylpyrrolidone and 1,1,1,3,3,3-hexafluoroisopropyl α-fluoroacrylate was written by Semchikov, Yu. D.;Zhil’tsova, O. E.;Zaitsev, S. D.;Mel’nikova, N. B.. And the article was included in Russian Journal of Applied Chemistry in 2010.Electric Literature of C14H12S2 This article mentions the following:

Colloidal properties of alternating N-vinylpyrrolidone-1,1,1,3,3,3-hexafluoroisopropyl α-fluoroacrylate copolymer were studied by the Langmuir film balance method. Self-assembly of the copolymer was observed The copolymer was a high performance surfactant. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Electric Literature of C14H12S2).

Benzyl benzodithioate (cas: 27249-90-7) 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. Polyesters are important plastics, with monomers linked by ester moieties. 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.Electric Literature of C14H12S2

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

Investigation on cyclic guanidine derivatives. Part III. Synthesis and properties of 2-piperidino- and 2-homopiperidino-tetrahydropyrimidine-4,6-dione derivatives was written by Zimon, Romuald;Cygankiewicz, Andrzej;Gorczyca, Maria. And the article was included in Polish Journal of Pharmacology and Pharmacy in 1976.Recommanded Product: 10203-58-4 This article mentions the following:

Pyrimidinediones I (R = H, Et, allyl, Pr, CHMe2, Bu, CH2CHMe2, pentyl, isopentyl, Ph, n = 1,2; R = Cl, n = 1; R = Me, n = 2) were prepared in 35-62% yield by condensing the amidines II with RCH(CO2Et)2. I (R = H, Ph, n = 1,2) had strong antidepressant activity (no data). In the experiment, the researchers used many compounds, for example, Diethyl isobutylmalonate (cas: 10203-58-4Recommanded Product: 10203-58-4).

Diethyl isobutylmalonate (cas: 10203-58-4) 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. 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. Recommanded Product: 10203-58-4

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

Construction of Bridged Aza- and Oxa-[n.2.1] Skeletons via an Intramolecular Formal [3 + 2] Cycloaddition of Aziridines and Epoxides with Electron-deficient Alkenes was written by Xing, Siyang;Wang, Yuhan;Jin, Changkun;Shi, Shaochen;Zhang, Yihui;Liao, Ziya;Wang, Kui;Zhu, Bolin. And the article was included in Journal of Organic Chemistry in 2022.Quality Control of malonic acid dibutyl ester This article mentions the following:

An intramol. formal [3+2] cycloaddition of activated aziridines and epoxides with electron-deficient alkene I (X = N,O; R¹ = Me, Et, n-Pr, i-Pr, n-bu, Bn; R³ = H, F, Cl; R⁴ = H, OMe, CF₃; R⁵ = H, Me; R² = 4-Br₆H₄, 4-NO₂C₆H₄, C₆H₅) has been developed for the general and efficient construction of bridged aza- and oxa-[n.2.1] (n = 3,4) II skeletons. The strategy can be promoted by lithium iodide efficiently. In order to demonstrate its potential, the intramol. formal [3 + 2] cycloaddition was used to access the important intermediate of homoepiboxidine. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Quality Control of malonic acid dibutyl ester).

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

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

Palladium-catalyzed arylation of diisopropyl malonate applied to the efficient synthesis of the selective MMP inhibitor 5-(4-phenoxyphenyl)-5-[4-(2-pyrimidinyl)-1-piperazinyl]barbituric acid was written by Hutchings, Stanley;Liu, Wen;Radinov, Roumen. And the article was included in Heterocycles in 2006.Electric Literature of C11H20O4 This article mentions the following:

An efficient synthesis of the highly selective MMP inhibitor 5-(4-phenoxyphenyl)-5-(4-pyrimidin-2-ylpiperazin-1-yl)barbituric acid is reported. The title compound was prepared in three steps and 72% overall yield from 4-bromophenyl Ph ether via an improved arylation of diisopropyl malonate. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Electric Literature of C11H20O4).

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. 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.Electric Literature of C11H20O4

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

Twin liquid crystals and segmented thermotropic polyesters containing azobenzene-effect of spacer length on LC properties was written by Nardele, Chinmay G.;Asha, S. K.. And the article was included in Journal of Polymer Science, Part A: Polymer Chemistry in 2012.Recommanded Product: Dimethyl decanedioate This article mentions the following:

Systematic studies are reported for a homologous series of twin liquid crystalline (LC) mols. based on phenylazobenzene and naphthylazobenzene (PnP and NpnNp, n = number of spacer groups) as well as segmented copolyesters based on them. The twin series had the structure azobenzene-oligooxyethylene-azobenzene, where the ethyleneoxy length was varied from 2 to 6 units. The LC properties of the twin series depended on the chem. structure of the azo chromophore and also the length of the central oligooxyethylene segment. The PnP series exhibited smectic LC properties for n greater than three oligooxyethylene units. Conversely, NpnNp series exhibited spherulitic phases only for the shortest member Np2Np. One non-LC short spacer twin (P2P) and one LC long spacer twin (P6P) were incorporated as part of a main chain polyester composed of fully aliphatic segments of sebacate and di- or tetraethylene glycol (DEG/TEG) units by melt polycondensation. Non-LC P2P formed LC polymers even at low (5 mol%) incorporation in DEG-based copolymers, whereas the LC-P6P could do so only at 30 mol% incorporation. The LC properties of the twin mols. as well as copolymers were studied using differential scanning calorimetry, polarized light microscopy (PLM) along with variable temperature wide angle X-ray diffraction. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Recommanded Product: Dimethyl decanedioate).

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

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

Glutamate as an efficient amine donor for the synthesis of chiral β- and γ-amino acids using transaminase was written by Kim, Geon-Hee;Jeon, Hyunwoo;Khobragade, Taresh P.;Patil, Mahesh D.;Sung, Sihyong;Yoon, Sanghan;Won, Yumi;Sarak, Sharad;Yun, Hyungdon. And the article was included in ChemCatChem in 2019.Safety of Ethyl 3-oxo-3-(m-tolyl)propanoate This article mentions the following:

A recyclable glutamate amine donor system employing transaminase (TA), glutamate dehydrogenase (GluDH) and mutant formate dehydrogenase (FDHm) was developed, wherein amine donor Glu was regenerated using GluDH and thereby circumvented the inhibition of TA by α-ketoglutarate. Various enantiopure β-, γ-amino acids, and amines were successfully synthesized with high conversions and excellent enantiomeric excess using this system. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Safety 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. 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 Ethyl 3-oxo-3-(m-tolyl)propanoate

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

Citrus limetta Peel-Derived Catalyst for Sustainable Production of Biodiesel was written by Yadav, Gaurav;Ahmaruzzaman, Mohammad. And the article was included in ACS Omega in 2022.Recommanded Product: Dimethyl decanedioate This article mentions the following:

To produce biodiesel from oleic acid (OA), the effectiveness of sweet lemon (Citrus limetta) waste peels as an acidic catalyst in an esterification process is examined in the current work. A biowaste-derived sulfonated carbon-based catalyst is fabricated without high temperatures via a simple one-pot process. Several techniques are used to investigate the chem. components and morphol. of the catalyst, including Fourier transform IR spectroscopy (FTIR), powder X-ray diffraction (XRD), SEM (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), XPS, thermogravimetric anal. (TGA), Brunauer-Emmett-Teller (BET), and N₂ adsorption-desorption. The biodiesel conversion is observed by gas chromatog.-mass spectrometry (GC-MS), proton NMR ¹H NMR, and carbon NMR ¹³C NMR. The excellent biodiesel conversion of 96% was obtained using optimized conditions, i.e., 1:20 of OA/MeOH, 5 wt % catalyst loading, 70°C temperature, and 3 h. The catalyst shows 87% conversion in just 1 h, and the maximum conversion was found to be â‰?6%. This high activity of the catalyst can be attributed to the presence of sulfonic groups and its porous nature. The formed catalyst shows excellent catalytic activity up to three cycles. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Recommanded Product: Dimethyl decanedioate).

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. 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.Recommanded Product: Dimethyl decanedioate

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

Zinc-Catalyzed Synthesis of Acylsilanes Using Carboxylic Acids and a Silylborane in the Presence of Pivalic Anhydride was written by Tatsumi, Kenta;Tanabe, Sae;Tsuji, Yasushi;Fujihara, Tetsuaki. And the article was included in Organic Letters in 2019.Computed Properties of C12H22O4 This article mentions the following:

Zn-catalyzed synthesis of acylsilanes using carboxylic acids and a silylborane was achieved in the presence of pivalic anhydride. Various carboxylic acids were converted to the corresponding acylsilanes. The in situ formation of mixed anhydrides was essential in the present reaction. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Computed Properties of C12H22O4).

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. 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. Computed Properties of C12H22O4

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

Synthesis of butyl 4-[4-hydroxy(alkanoyloxy, aroyloxy)benzylideneamino]benzoates was written by Dikusar, E. A.;Kozlov, N. G.;Potkin, V. I.. And the article was included in Russian Journal of Organic Chemistry in 2008.Application of 20665-85-4 This article mentions the following:

A series of Schiff bases containing ether and ester groups, e.g., I (R¹ = Me, Et; R² = H, Ac, etc), were synthesized by reactions of Bu 4-aminobenzoate with vanillin and 3-ethoxy-4-hydroxybenzaldehyde and their esters. 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 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. 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 of 20665-85-4

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