Month: December 2022

Alper, Koray published the artcileUse of a Lewis acid, a Bronsted acid, and their binary mixtures for the liquefaction of lignocellulose by supercritical ethanol processing, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is lignocellulose supercritical ethanol liquefaction Lewis acid catalyst.

Supercritical ethanol liquefaction of teak wood was carried out at 300°C for 30 min without and with the use of Mg(ClO4)2, HClO4, and HClO4/Mg(ClO4)2 at various loadings (2-10 mmol). The bio-oil yield from the non-catalytic supercritical ethanol liquefaction of teak wood was ∼41 weight%. The highest bio-oil yield (∼58.2 weight%) was obtained with the catalytic run using 2 mmol of Mg(ClO4)2. In the catalyzed trials, with the use of either Mg(ClO4)2 or HClO4, an increase in catalyst amounts resulted in a decrease in bio-oil yields. There was no clear trend for the use of co-catalysts. A degree of de-oxygenation was observed with the use of the catalysts studied. The O/C at. ratio of the bio-oil from the non-catalytic was 0.44. The O/C at. ratios in the bio-oil produced from catalytic runs ranged from 0.25 to 0.38. In the bio-oil from the non-catalytic run, the major compound was phenolic species, whereas esters were dominant in the bio-oils from the catalytic runs. The type of catalyst and its amount had significant effects on the product distributions and compositions The prominent ester compounds were Et lactate and Et levulinate. The highest relative yield of Et levulinate was 49.1% and obtained with the use of the Mg(ClO4)2/HClO4 (2 mmol : 10 mmol) catalyst. The heating values of the bio-oils from catalytic runs were higher than that of the non-catalytic run. The highest heating value of 31.21 MJ kg-1 was obtained with the Mg(ClO)2/HClO4 (2 mmol : 10 mmol) catalyst.

Sustainable Energy & Fuels published new progress about Alcohols Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), PROC (Process), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Recommanded Product: Ethyl 4-oxopentanoate.

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

Li, Minghua published the artcileAn intelligent responsive macrophage cell membrane-camouflaged mesoporous silicon nanorod drug delivery system for precise targeted therapy of tumors, COA of Formula: C24H14Cl2O7, the main research area is macrophage cell membrane mesoporous silica nanorod antitumor; Drug delivery; Macrophage cell membrane; Mesoporous silicon nanorods; Precision tumor therapy.

Macrophage cell membrane-camouflaged nanocarriers can effectively reduce immune cell clearance and actively target tumors. In this study, a macrophage cell membrane-camouflaged mesoporous silica nanorod (MSNR)-based antitumor drug carrier equipped with a cationic polymer layer was developed. As drug carriers, these MSNRs were loaded with the thermosensitive phase change material L-menthol (LM), the chemotherapy drug doxorubicin (DOX) and the fluorescent mol. indocyanine green (ICG). The rod-like shape of the MSNRs was shown to enhance the penetration of the drug carriers to tumors. In the weakly acidic tumor microenvironment, the cationic polymer exhibited a proton sponge effect to trigger macrophage cell membrane coating detachment, promoting tumor cell uptake. Following nanocarrier uptake, ICG is heated by near-IR (NIR) irradiation to make LM undergo a phase transition to release DOX and generate a synergistic effect of thermochemotherapy which kills tumor cells and inhibits tumor growth together with reactive oxygen species (ROS) produced by ICG. Overall, this nanohybrid drug delivery system demonstrates an intelligent cascade response, leads to tissue-cell specific targeting and improves drug release accuracy, thus proving to be an effective cancer therapy.

Journal of Nanobiotechnology published new progress about Antitumor agents. 2044-85-1 belongs to class esters-buliding-blocks, name is 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, and the molecular formula is C24H14Cl2O7, COA of Formula: C24H14Cl2O7.

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

Chang, Meng-Yang published the artcileBi(OTf)3-Mediated (4+1) Annulation of α-Sulfonyl o-Hydroxyacetophenones with α-Hydroxy Arylketones to Access Sulfonyl 2-Aroylbenzofurans, Synthetic Route of 623-50-7, the main research area is sulfonyl aroylbenzofuran green preparation; hydroxyacetophenone sulfonyl hydroxy aryl ketone cyclocondensation bismuth trifluoromethanesulfonate mediated; methyl aroylbenzofuran green preparation; aryl ketone hydroxy acetophenone cyclocondensation bismuth trifluoromethanesulfonate mediated.

A high-yield, facile route for the scalable synthesis of sulfonyl 2-aroylbenzofurans I [R = Me, Ph, 4-MeC6H4, etc.; R1 = 5-Me, 5-F, 5-Cl, etc.; Ar = Ph, 4-MeC6H4, 2-naphthyl, etc.] via a Bi(OTf)3-mediated intermol. double cyclocondensation of α-sulfonyl o-hydroxyacetophenones with substituted α-hydroxy arylketones under mild open-vessel reaction conditions was described. Also, synthesis of 3-methyl-2-aroylbenzofurans II [R2 = 5-OMe, 5-F, 5-Cl, etc.; Ar1 = Ph, 4-BrC6H4, 2-thienyl, etc.] was obtained under same reaction conditions using o-hydroxyacetophenones with substituted α-hydroxy aryl ketones. In the overall reactions, water was generated as the only byproduct. Various metal triflate-promoted reactions and conditions were investigated for the efficient one-pot (4+1) annulation reaction.

Advanced Synthesis & Catalysis published new progress about Aryl ketones Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, Synthetic Route of 623-50-7.

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

de Barros Vinhal, Gabrielle Lazara Ribeiro Rodrigues published the artcileMurici (Byrsonima verbascifolia): A high bioactive potential fruit for application in cereal bars, Formula: C9H18O2, the main research area is Byrsonima verbascifolia bioactive potential fruit cereal bar application.

In order to popularize and use murici fruit (Byrsonima verbascifolia) in processed foods, the aim of the study was to characterize the fresh fruit as to its antioxidant capacity, volatile and bioactive compounds and to evaluate the effect of murici content on total carotenoids and sensory attributes in enriched cereal bars. For the development of cereal bars, a Plackett-Burman design was elaborated, containing eight independent variables: glucose syrup, oats in thick flakes, corn flakes, rice flakes, dehydrated murici, soy lecithin, hydrogenated vegetable fat, and brown sugar. Fresh murici were characterized for proximate composition, total and individual carotenoids, antioxidant capacity, volatile compounds, and microbiol. anal. The murici was mainly a good source of fiber (6.4%) and lipids (7.3%), with significant levels of total carotenoids (15.3μg of β-carotene/g) and antioxidant capacity by FRAP method and ABTS method. The volatile fraction of murici mainly contains esters with descriptors such as cheese and fruity. The exptl. design used helped obtain the formulations of cereal bars with murici and demonstrated that the content of carotenoids increases as the amount of added fruit increases.

LWT–Food Science and Technology published new progress about Antioxidants. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Formula: C9H18O2.

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

de Barros Vinhal, Gabrielle Lazara Ribeiro Rodrigues published the artcileMurici (Byrsonima verbascifolia): A high bioactive potential fruit for application in cereal bars, Computed Properties of 110-42-9, the main research area is Byrsonima verbascifolia bioactive potential fruit cereal bar application.

In order to popularize and use murici fruit (Byrsonima verbascifolia) in processed foods, the aim of the study was to characterize the fresh fruit as to its antioxidant capacity, volatile and bioactive compounds and to evaluate the effect of murici content on total carotenoids and sensory attributes in enriched cereal bars. For the development of cereal bars, a Plackett-Burman design was elaborated, containing eight independent variables: glucose syrup, oats in thick flakes, corn flakes, rice flakes, dehydrated murici, soy lecithin, hydrogenated vegetable fat, and brown sugar. Fresh murici were characterized for proximate composition, total and individual carotenoids, antioxidant capacity, volatile compounds, and microbiol. anal. The murici was mainly a good source of fiber (6.4%) and lipids (7.3%), with significant levels of total carotenoids (15.3μg of β-carotene/g) and antioxidant capacity by FRAP method and ABTS method. The volatile fraction of murici mainly contains esters with descriptors such as cheese and fruity. The exptl. design used helped obtain the formulations of cereal bars with murici and demonstrated that the content of carotenoids increases as the amount of added fruit increases.

LWT–Food Science and Technology published new progress about Antioxidants. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Computed Properties of 110-42-9.

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

Alhaddad, Maha published the artcileAlkyl substituted 4-N-oxazadisilinane cations: A new family of Si protic ionic liquids and its application on esterification reactions, Application of Benzyl acetate, the main research area is oxazadisilinane preparation Bronsted acid ammonium salt ionic liquid; Bronsted acid oxazadisilinane ammonium salt esterification catalysts.

A series of oxazadisilinane compounds O(SiMe2CH2)NR (R = Bu, C6H13, C8H17, tBu, cyclopentyl, cyclohexyl) were prepared and used as Bronsted bases to form a series of 21 siloxane protic ionic liquids, salts [O(SiMe2CH2)N+HR]X (Si-PILs; X = Cl-, MeSO3-, BF4-, HSO3-) with four different acids. This new family of Si-PILs were well characterized and examined to catalyze esterification reactions.

Tetrahedron Letters published new progress about Crystal structure. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Application of Benzyl acetate.

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

Guan, Lin published the artcileHighly transparent and stretchable hydrogels with rapidly responsive photochromic performance for UV-irradiated optical display devices, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is hydrogel photochromic optical display flexible acrylic.

Photochromic hydrogels have attracted considerable attention owing to their potential application in optical devices. However, the weak mech. properties severely limited their applications. Here, a novel photochromic hydrogel with high transparency, high stretchability and rapid photochromic responsiveness has been successfully designed and prepared by introducing a redox photochromic material (Mo) into the hybrid hydrogel. The photochromic hydrogel with rapid photochromic response achieved discoloration process within only 3 s and the fading process could be easily performed under the air environment. Moreover, the ability to rewrite and erase optical information have been implemented on the photochromic hydrogels. Therefore, this strategy of photochromic hydrogel would contribute to design a new generation of optical display devices.

Reactive & Functional Polymers published new progress about Flexible displays. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Recommanded Product: Dodecyl 2-methylacrylate.

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

Parrot, Isabelle published the artcileVolatile Compounds from Flowers of Elaeagnus x submacrophylla Servett.: Extraction, Identification of Flavonoids, and Antioxidant Capacity, Recommanded Product: Benzyl acetate, the main research area is Elaeagnus submacrophylla flavonoid volatile compound extraction antioxidant capacity; Elaeagnus submacrophylla; antioxidants; flavonoids; phenolic content; volatile compounds.

Beneficial to the ecosystem and with significant potential in permaculture, Elaeagnus x submacrophylla Servett. was studied here mainly for the identification of its floral odorants. After olfactory evaluation and determination of the volatile profile of freshly picked flowers by headspace/solid phase microextraction coupled with gas chromatog./mass spectrometry, an ethanolic extract was prepared and investigated for its antioxidant capacity. Unusual mols. were identified in the floral headspace, such as isochavicol or chrysanthemum acetate. The evaluation of the in vitro free radical scavenging capacity (from 0.4 to 1.3 mmol TE/g) and total phenolic content (65.1 mg GAE/g) of the extract pointed out a promising antioxidant activity, potentially related to the identification of several flavonoid glycosides. These results have to be considered in the context of the ever-increasing need to produce innovative natural extracts with notably interesting claims for the cosmetic field.

ChemPlusChem published new progress about Aldehydes Role: ANT (Analyte), FFD (Food or Feed Use), PAC (Pharmacological Activity), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

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

Su, Esra published the artcileSolvent-Free UV Polymerization of n-Octadecyl Acrylate in Butyl Rubber: A Simple Way to Produce Tough and Smart Polymeric Materials at Ambient Temperature, Application of Dodecyl 2-methylacrylate, the main research area is solver free photopolymerization octadecyl acrylate butyl rubber smart material; butyl rubber; interconnected IPNs; n-octadecyl acrylate; self-healing; shape memory.

One of the most fascinating challenges in recent years has been to produce mech. robust and tough polymers with smart functions such as self-healing and shape-memory behavior. Here, we report a simple and versatile strategy for the preparation of a highly tough and highly stretchable interconnected interpenetrating polymer network (c-IPN) based on butyl rubber (IIR) and poly(n-octadecyl acrylate) (PC18A) with thermally induced healing and shape-memory functions. Solvent-free UV polymerization of n-octadecyl acrylate (C18A) at 30 ± 2°C in the presence of IIR leads to IIR/PC18A c-IPNs with sea-island or co-continuous morphologies depending on their IIR contents. The lamellar crystals with a melting temperature Tm of 51-52°C formed by side-by-side packed octadecyl (C18) side chains are responsible for more than 99% of effective cross-links in c-IPNs, the rest being hydrophobic associations and chem. cross-links. The c-IPNs exhibit varying stiffness (9-34 MPa), stretchability (72-740%), and a significantly higher toughness (1.9-12 MJ·m-3) than their components, which can be tuned by changing the IIR/PC18A weight ratio. The properties of c-IPNs could also be tuned by incorporating a second, noncrystallizable hydrophobic monomer, namely, lauryl methacrylate (C12M), in the melt mixture We show that the lamellar clusters acting as sacrificial bonds break at the yield point by dissipation of energy, while the ductile amorphous continuous phase keeps the structure together, leading to the toughness improvement of c-IPNs. They exhibit a two-step healing process with >90% healing efficiency with respect to the modulus and a complete shape-recovery ratio induced by heating above Tm of alkyl crystals. The temperature-induced healing occurs via a quick step where C18 bridges form between the damaged surfaces followed by a slow step controlled by the interdiffusion of C18A segments in the bulk. We also show that the strategy developed here is suitable for a variety of rubbers and n-alkyl (meth)acrylates of various side-chain lengths.

ACS Applied Materials & Interfaces published new progress about Crystal structure types, layered. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Application of Dodecyl 2-methylacrylate.

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

Hernandez-Ramos, Fabio published the artcileRenewable Biopolyols from Residual Aqueous Phase Resulting after Lignin Precipitation, COA of Formula: C4H8O3, the main research area is renewable biopolyol production residual aqueous phase lignin precipitation.

The aim of this work was to obtain two biopolyols from the liquid residue resulting from the precipitation of lignin contained in two different black liquors, Eucalyptus globulus organosolv black liquor (EOBL) and Pinus radiata organosolv black liquor (POBL), thus adding value to this residue. Eucalyptus organosolv polyol (EOP) and Pine organosolv polyol (POP) were characterized to know their viscosity, hydroxyl number (IOH), and functionality according to the corresponding standard American Society for Testing Materials (ASTM). The mol. weight of the biopolyols was measured through gel permeation chromatog. (GPC); the chem. structure and composition were characterized by Fourier transform IR (FTIR) and gas chromatog.-mass spectrometry (GC-MS), resp.; and the thermal degradation (TGA) of the two biopolyols was determined The biopolyols showed suitable properties to be employed in the production of polyurethanes (PU).

ACS Sustainable Chemistry & Engineering published new progress about Density. 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, COA of Formula: C4H8O3.

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