November 2022 - Page 84 of 508 - Esters-buliding-blocks

Guo, Qiyong’s team published research in Food Control in 134 | CAS: 103-26-4

Food Control published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Synthetic Route of 103-26-4.

Guo, Qiyong published the artcileComparative analysis of volatile profiles in four pine-mushrooms using HS-SPME/GC-MS and E-nose, Synthetic Route of 103-26-4, the publication is Food Control (2022), 108711, database is CAplus.

Pine-mushrooms is rich in bioactive compounds, possess a unique aroma profile for culinary art. In China, pine-mushroom has been produced in Southwest and Northeast area. However, the discrepancy of volatile profiles in pine-mushrooms from two regions was unclear due to different extraction and detection method applied in research. This study attempted to compare the volatile profiles of four pine-mushrooms from Southwest (LS) and Northeast (HEB, SY, MDJ) using Headspace Solid Phase Microextraction coupled with Gas Chromatog. Mass Spectrometry (HS-SPME/GC-MS) and Electronic nose (E-nose). showed a significant difference in aroma profiles among samples. A total of 100 volatile compounds were identified, and separated into 11 classes. Benzaldehyde and hexanal were detected in all samples, which could be the pivotal aroma components in pine-mushrooms. Aromatic components, were present in LS pine-mushroom from Southwest China, including abundant of Me (Z)-N-hydroxybenzenecarboximidate, benzaldehyde, and Me 3-phenylprop-2-enoate. Meanwhile, some alcs. (such as oct-1-en-3-ol, hexan-1-ol) were characteristic compounds present in HEB, SY and MDJ samples. Principal component anal. (PCA) of E-nose data showed a clear distinction among samples. In addition, this study also highlighted the correlation between key volatile compounds detected by GC-MS and E-nose sensors, which could be benefit for further explanation to the origin of differences in sensory quality of pine-mushrooms.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Abraham, Michael H.’s team published research in Fluid Phase Equilibria in 519 | CAS: 1877-71-0

Fluid Phase Equilibria published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C9H8O4, Name: 3-(Methoxycarbonyl)benzoic acid.

Abraham, Michael H. published the artcileEstimation of vapor pressures of liquid and solid organic and organometallic compounds at 298.15 K, Name: 3-(Methoxycarbonyl)benzoic acid, the publication is Fluid Phase Equilibria (2020), 112595, database is CAplus.

Equations for vapor pressure VP, as log VP, at 298.15 K for a set of 1016 liquid organic and organometallic compounds have been constructed using Abraham descriptors. The regression standard deviations of 0.28 and 0.31 log units are excellent by comparison with literature values for large data sets. Similar equations for a set of 359 solid organic and organometallic compounds were very poor, but if carboxylic acids were excluded we obtained equations for 261 compounds with standard deviations of 0.62 and 0.66 log units. For the 98 carboxylic acids taken sep. we obtained equations with standard deviations of 0.84 and 0.91 log units. Equations for the carboxylic acids were substantially different to those that excluded carboxylic acids, due, we suggest, to the particular dimeric structure of the crystalline carboxylic acids.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Bravo-Altamirano, Karla’s team published research in Journal of Organic Chemistry in 73 | CAS: 5205-11-8

Journal of Organic Chemistry published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C12H14O2, Formula: C12H14O2.

Bravo-Altamirano, Karla published the artcilePalladium-Catalyzed Reactions of Hypophosphorous Compounds with Allenes, Dienes, and Allylic Electrophiles: Methodology for the Synthesis of Allylic H-Phosphinates, Formula: C12H14O2, the publication is Journal of Organic Chemistry (2008), 73(6), 2292-2301, database is CAplus and MEDLINE.

Hypophosphorous compounds (MOP(O)H₂, M = H, R₃NH) effectively participate in metal-catalyzed C-P bond-forming reactions with allenes, dienes, and activated allylic electrophiles under mild conditions. The catalytic system Pd₂dba₃/xantphos is crucial to avoid or minimize the competitive reductive transfer-hydrogenation pathway available to hypophosphorous acid derivatives Further study into the allylation mechanism provided access to the analogy allylic acetate-allylic phosphinate, which then led to the development of a Pd-catalyzed rearrangement of preformed allylic phosphinates esters and, ultimately, to a catalytic dehydrative allylation of hypophosphorous acid with allylic alcs. The reactions disclosed herein constitute efficient synthetic approaches, not only to prepare allylic H-phosphinic acids but also their esters via one-pot tandem processes. The potential of H-phosphinates as useful synthons for the preparation of other organophosphorus compounds is demonstrated.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ranjbarha, Zahra’s team published research in Polymers and Polymer Composites in 29 | CAS: 31570-04-4

Polymers and Polymer Composites published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Category: esters-buliding-blocks.

Ranjbarha, Zahra published the artcileHigh density polyethylene/wood flour composite: optimization of processing temperature, processing time and coupling agent concentration, Category: esters-buliding-blocks, the publication is Polymers and Polymer Composites (2021), 29(9_suppl), S106-S116, database is CAplus.

Wood plastic composites (WPCs) consisting of high d. polyethylene (HDPE) reinforced with high-loading (55 wt%) of wood flour (WF) were fabricated with melt-blending technique. In this compounding method, processing parameters such as different mixing temperatures (of 165, 180 and 195°), mixing times (of 5, 10 and 15 min) and coupling agent contents (of 2 and 4 wt%) were evaluated. Prepared specimens were analyzed with tensile, Izod, shore D, DMTA, short-term creep, DSC, TGA, water absorption and water contact angle characterizations. Results revealed that mixing temperature of 180°C, mixing time of 10 min and coupling agent concentration of 4 wt% were found as the best processing conditions. The mentioned conditions provided enhanced dispersion of WF particles within the HDPE matrix, due to optimum viscosity of the polymer melt and effective residence time of compound in the mixer, and beside them efficient interfacial adhesion between WF and polymer matrix.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Saijo, Naoya’s team published research in Brain & development in 44 | CAS: 624-49-7

Brain & development published new progress about 624-49-7. 624-49-7 belongs to esters-buliding-blocks, auxiliary class Inhibitor,Natural product, name is Dimethyl fumarate, and the molecular formula is C6H8O4, Computed Properties of 624-49-7.

Saijo, Naoya published the artcileSuccessful treatment with dimethyl fumarate in a child with relapsing-remitting multiple sclerosis., Computed Properties of 624-49-7, the publication is Brain & development (2022), 44(5), 353-356, database is MEDLINE.

INTRODUCTION: Early disease control with disease-modifying drugs is important for improving the prognosis of multiple sclerosis (MS) in children. Dimethyl fumarate (DMF) is an oral disease-modifying drug for MS in adults with relatively stable disease; however, its use in young children has not been heavily documented in the current literature. We report the case of a pediatric patient with relapsing-remitting MS who was treated with DMF. CASE REPORT: A 3-year-old boy with a history of common cold symptoms developed unsteadiness and somnolence. Magnetic resonance imaging revealed multiple white matter lesions. Symptoms were recurrent, and DMF was prescribed at 6 years of age due to a relapse episode with oculomotor disability and facial paralysis. However, disease progression continued, and new lesions were noted at age 7; thus, the dose of DMF was increased to 240 mg/day. No relapse has been observed for over three years; sequelae or severe side effects were absent. CONCLUSIONS: DMF may be a useful oral disease-modifying drug for preventing recurrence in young children with MS.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Piletska, Elena V.’s team published research in Analyst (Cambridge, United Kingdom) in 140 | CAS: 3052-61-7

Analyst (Cambridge, United Kingdom) published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, HPLC of Formula: 3052-61-7.

Piletska, Elena V. published the artcileMagnetic high throughput screening system for the development of nano-sized molecularly imprinted polymers for controlled delivery of curcumin, HPLC of Formula: 3052-61-7, the publication is Analyst (Cambridge, United Kingdom) (2015), 140(9), 3113-3120, database is CAplus and MEDLINE.

Curcumin is a versatile anti-inflammatory and anti-cancer agent known for its low bioavailability, which could be improved by developing materials capable of binding and releasing drug in a controlled fashion. The present study describes the preparation of magnetic nano-sized Molecularly Imprinted Polymers (nanoMIPs) for the controlled delivery of curcumin and their high throughput characterization using microtiter plates modified with magnetic inserts. NanoMIPs were synthesized using functional monomers chosen with the aid of mol. modeling. The rate of release of curcumin from five polymers was studied under aqueous conditions and was found to correlate well with the binding energies obtained computationally. The presence of specific monomers was shown to be significant in ensuring effective binding of curcumin and to the rate of release obtained. Characterization of the polymer particles was carried out using dynamic light scattering (DLS) technique and SEM in order to establish the relationship between irradiation time and particle size. The protocols optimized during this study could be used as a blueprint for the development of nanoMIPs capable of the controlled release of potentially any compound of interest.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

El-Abadelah, Mustafa M.’s team published research in Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences in 73 | CAS: 924-99-2

Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C7H13NO2, Formula: C7H13NO2.

El-Abadelah, Mustafa M. published the artcileHeterocycles [h]-fused onto 4-oxoquinoline-3-carboxylic acid. Part XII: synthesis of 5-fluoro-7-oxodihydro[1,3,4]thiadiazino[5,6-h]quinoline-8-carboxylic acid and ester, Formula: C7H13NO2, the publication is Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences (2018), 73(1), 23-28, database is CAplus.

Direct interaction of dithizone with 7-chloro-6-fluoro-8-nitro-4-oxoquinoline-3-carboxylic acid and its ester delivered the corresponding novel 1,3,4-thiadiazino[5,6-h]quinoline-3-carboxylic acid and its ester I [R = H, Et] resp., alternatively latter ester derivative I [R = Et] was hydrolyzed to its acid derivative I [R = H]. Structures of the latter tricyclic hybrids I [R = H, Et] were deduced from anal. and spectral data and confirmed by single crystal X-ray structure determination of the compound I [R = Et]. The synthesized title compounds I [R = H, Et] were evaluated for antibacterial activity against Staphylococcus aureus ATCC 6538 and Escherichia coli ATCC 8739, antifungal activity against Candida albicans. Compound I [R = H] showed moderate activity against Staphylococcus aureus with a MIC value of 25 μg mL^-1 and compounds I [R = H, Et] were inactive against Candida albicans.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Al-Qawasmeh, Raed A.’s team published research in Journal of Enzyme Inhibition and Medicinal Chemistry in 29 | CAS: 924-99-2

Journal of Enzyme Inhibition and Medicinal Chemistry published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C7H13NO2, Recommanded Product: Ethyl 3-(dimethylamino)acrylate.

Al-Qawasmeh, Raed A. published the artcileDesign, synthesis and antibacterial activity studies of new thiadiazoloquinolone compounds, Recommanded Product: Ethyl 3-(dimethylamino)acrylate, the publication is Journal of Enzyme Inhibition and Medicinal Chemistry (2014), 29(6), 777-785, database is CAplus and MEDLINE.

New 9-(alkyl/aryl)-4-fluoro-6-oxo-[1,2,5]thiadiazolo[3,4-h]quinoline-5-carboxylic acids I [R = Et, C₆H₅, 4-FC₆H₄, 4-MeOC₆H₄; R¹ = H] and their esters I [R¹ = Me, Et] were designed and synthesized. A detailed discussion of the reactions utilized in the preparation of the intermediates and target compounds was reported. All the intermediates and the final acids and esters were tested against bacterial and fungal strains. Among the tested compounds, the carboxylic acid derivatives I [R = Et, 4-FC₆H₄; R¹ = H] proved to be very active against Gram pos. and Gram neg. bacteria with MIC 0.15-3 μg/mL. The structure-activity relationship of antibacterial thiadiazoloquinolones showed that carboxylic acid derivatives I [R = Et, 4-FC₆H₄; R¹ = H] are twice less potent than the corresponding cyclopropyl derivative I [R = cyclopropyl; R¹ = H]. Therefore, the cyclopropyl moiety on N-9 of thiadiazoloquinolone seems to be the most suitable substituent.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Khacef, Leila et al. published their research in Langmuir in 2021 | CAS: 112-14-1

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

Effect of Solvent on the Mechanical and Structural Properties of N-Alkyldiamide Organogels was written by Khacef, Leila;Legros, Philippe;Herve, Pascal;Ovarlez, Guillaume;Medina-Gonzalez, Yaocihuatl. And the article was included in Langmuir in 2021.Quality Control of Octyl acetate The following contents are mentioned in the article:

Here, we study organogels prepared thanks to a new organogelator, the N-oleyldiamide mol., which shows a remarkable propensity to gelify a large scope of solvents, from aprotic to high protic solvents. The solvent plays a key role in the formation and stability of supramol. self-assemblies. However, the understanding and the control of its effects can be complex as many parameters are a priori involved. This study aims to understand the effect of solvent on the structures of organogels and on their final mech. properties. Five solvent classes have been selected ranking from low protic to high protic, according to the Hansen H-bond parameter δh. The solvent proticity appears to be one of the main parameters that affect the organogel internal structure and therefore the final rheol. properties. For a given organogelator fraction, the terminal elastic modulus measured by oscillatory rheol. is observed to increase significantly with the Hansen H-bond solvent parameter δh. Materials of different mech. properties are then shown to display various structures, which are investigated thanks to cryo-SEM. Besides, wide-angle X-ray scattering (WAXS) has been used to probe the gelator organization at the mol. scale with regard to the solvent nature, to understand the supramol. self-assembly of this promising mol. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Quality Control of Octyl acetate).

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

Munro-Leighton, Colleen et al. published their research in Organometallics in 2007 | CAS: 763-69-9

Ethyl 3-ethoxypropanoate (cas: 763-69-9) 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.Safety of Ethyl 3-ethoxypropanoate

Addition of N-H and O-H Bonds of Amines and Alcohols to Electron-Deficient Olefins Catalyzed by Monomeric Copper(I) Systems: Reaction Scope, Mechanistic Details, and Comparison of Catalyst Efficiency was written by Munro-Leighton, Colleen;Delp, Samuel A.;Blue, Elizabeth D.;Gunnoe, T. Brent. And the article was included in Organometallics in 2007.Safety of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Monomeric Cu(I) amido, alkoxide, and aryloxide complexes catalyze the addition of N-H and O-H bonds of amines and alcs., resp., to electron-deficient olefins. The ancillary ligands of the active catalysts include the N-heterocyclic carbene (NHC) ligands IPr, IMes, and SIPr {IPr = 1,3-bis(2,6-diisopropylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene; IMes = 1,3-bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene; SIPr = 1,3-bis(2,6-diisopropylphenyl)imidazolidin-2-ylidene} as well as the chelating bisphosphine ligand dtbpe {dtbpe = 1,2-bis(di-tert-butylphosphino)ethane}. For the hydroamination and hydroalkoxylation of olefins, both aromatic and alkyl substituents can be incorporated into the nucleophile, and both primary and secondary amines are reactive. Monosubstituted and disubstituted olefins undergo reaction. For the addition of aniline to acrylonitrile, kinetic studies suggest a pathway that is dependent on the concentration of amine, olefin, and catalyst as well as inversely proportional to the concentration of the product 3-anilinopropionitrile. At low concentrations, the addition of tert-butylisonitrile increases the rate of catalysis. The proposed mechanism involves N-C or O-C bond formation by an intermol. nucleophilic addition of the amido, alkoxide, or aryloxide ligand to free olefin. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Safety of Ethyl 3-ethoxypropanoate).

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