Tag: M.W=150-200

Aminkhani, Ali published the artcileChemical Constituent, Antimicrobial Activity, and Synergistic Effect of the Stem, Leaf, and Flower Essential Oil of the Artemisia fragrans Willd. from Khoy, Quality Control of 103-26-4, the publication is Chemistry & Biodiversity (2021), 18(8), e2100241, database is CAplus and MEDLINE.

Artemisia fragrans is commonly used as a folk medicine as antispasmodic, anti-pyretic, anti-inflammatory, and abortifacient agents. The villagers use its pungent odor to repel rodents, mites, and pests, as well as its essential oil and smoke after burning to treat lung infections after uprooting the plant. Herein, we extracted the essential oils (EOs) of different parts of the plant and analyzed their chem. compositions and antibacterial activities. The chem. anal. led to the identification of 73, 59, and 57 compounds in the EOs of the stem, leaf, and flower, resp. All of the EOs exhibited antibacterial activities against both G+ and G- bacteria. The EOs of the leaf and flower were more effective against tested bacteria, except B. anthracis and P. aeruginosa, compared to that of the stem. The binary combination of the EOs (stem and flower) or (stem and leaf) showed a synergistic effect. Statistical anal. indicated EOs of leaf and flower are more potent than that of the stem. These findings suggest the application of leaf and flower of the plant, which not only can prevent its uprooting but also ensure better therapeutic function.

Chemistry & Biodiversity 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, Quality Control of 103-26-4.

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

Gawlig, Christopher published the artcileOne-Pot Conversion of Cyclohexane to Adipic Acid Using a μ₄-Oxido-Copper Cluster as Catalyst Together with Hydrogen Peroxide, Related Products of esters-buliding-blocks, the publication is European Journal of Inorganic Chemistry (2020), 2020(3), 248-252, database is CAplus.

The production of Nylon-6.6 is one of the largest scale syntheses in industrial chem. The standard procedure is based on an energy consuming low-level conversion of cyclohexane to yield adipic acid in two steps that is converted to Nylon-6.6 in a sep. step. Therefore, there is a strong intent to optimize the synthetic route in an economic and ecol. matter. In this work, we present a one-pot oxygenation of cyclohexane with hydrogen peroxide and a μ₄-oxido-copper cluster catalyst to yield dicarboxylic acids with adipic acid as the main product.

European Journal of Inorganic Chemistry published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Related Products of esters-buliding-blocks.

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

Lecroq, William published the artcileMetal-Free Deoxygenation of Amine N-Oxides: Synthetic and Mechanistic Studies, Synthetic Route of 10287-53-3, the publication is ChemPhysChem (2021), 22(12), 1237-1242, database is CAplus and MEDLINE.

An unprecedented combination of light and P(III)/P(V) redox cycling for the efficient deoxygenation of aromatic amine N-oxides was reported. Moreover, a large variety of aliphatic amine N-oxides was easily deoxygenated by using only phenylsilane. These practically simple approaches proceeded well under metal-free conditions, tolerated many functionalities and were highly chemoselective. Combined exptl. and computational studies enabled a deep understanding of factors controlling the reactivity of both aromatic and aliphatic amine N-oxides.

ChemPhysChem published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Synthetic Route of 10287-53-3.

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

Durner, Juergen published the artcileDirect and indirect eluates from bulk fill resin-based-composites, Safety of Ethyl 4-dimethylaminobenzoate, the publication is Dental Materials (2022), 38(3), 489-507, database is CAplus and MEDLINE.

To compare elutable substances directly released from bulk-fill (BF) resin-based composites (RBCs) with indirect elution from teeth restored with a BF composite. In addition to (co)monomers, the anal. focus was on other potentially toxic ingredients or impurities. Furthermore, the barrier function of the residual dentin/adhesive layer was studied.Six BF-RBC materials were studied. For each material subgroup, ten human third molar teeth with standard Class-I occlusal cavities were prepared and provided with a three-step adhesive system and the resp. composite restoration (tooth groups). Same sized control specimens of the restorative material were prepared (′direct BF-RBCâ€?groups). Each specimen was placed in an elution chamber such that the elution media (ethanol/water, 3:1) only contacted the tooth root or 3/4 height of each specimen. They were incubated at 37 °C for up to 7 d. Samples of eluate were taken after 1, 2, 4 and 7 d and were analyzed by high-temperature gas chromatog./mass spectrometry.(Co)monomers such as Bisphenol A ethoxylate dimethacrylate (bisEMA) or tetraethylene glycol dimethacrylate (TEEGDMA) were mostly found in the eluates of the ′direct BF-RBCâ€?groups in statistically significantly greater amounts than in the eluates of the ′tooth groupsâ€? The residual dentin and/or adhesive layers acted as a diffusion barrier for most of the substances except for triethylene glycol dimethacrylate (TEGDMA) or diethylene glycol dimethacrylate (DEGDMA). For TEGDMA up to 3 orders of magnitude more were found in the ′tooth groupsâ€?compared to the ′direct BF-RBCâ€?groups, evidently released by the adhesive system.Substances of Very High Concern (SVHC) including TINUVIN 328 and BPA were found mainly in the eluates of ′direct BF-RBCâ€?groups.For estimation of biocompatibility, a total system, specifically BF-RBC + adhesive, should always be investigated since individual considerations, such as only elution from a BF-RBC, do not correctly reflect the total clin. situation. The focus of elution tests should not only be on the co(monomers), but also on other ingredients or impurities that may be released.

Dental Materials published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Safety of Ethyl 4-dimethylaminobenzoate.

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

Wypysek, Sarah K. published the artcileTailoring the Cavity of Hollow Polyelectrolyte Microgels, Related Products of esters-buliding-blocks, the publication is Macromolecular Rapid Communications (2020), 41(1), 1900422, database is CAplus and MEDLINE.

The authors demonstrate how the size and structure of the cavity of hollow charged microgels may be controlled by varying pH and ionic strength. Hollow charged microgels based on N-isopropylacrylamide with ionizable comonomers (itaconic acid) combine advanced structure with enhanced responsiveness to external stimuli. Structural advantages accrue from the increased surface area provided by the extra internal surface. Extreme sensitivity to pH and ionic strength due to ionizable moieties in the polymer network differentiates these soft colloidal particles from their uncharged counterparts, which sustain a hollow structure only at cross-link densities sufficiently high that stimuli sensitivity is reduced. Using small-angle neutron and light scattering, increased swelling of the network in the charged state accompanied by an expanded internal cavity is observed Upon addition of salt, the external fuzziness of the microgel surface diminishes while the internal fuzziness grows. These structural changes are interpreted via Poisson-Boltzmann theory in the cell model.

Macromolecular Rapid Communications published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C6H12F3NO5S, Related Products of esters-buliding-blocks.

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

Kirihara, Masayuki published the artcileAerobic Photooxidation of Toluene Derivatives into Carboxylic Acids with Bromine-Water under Catalyst-Free Conditions, Formula: C9H8O4, the publication is Synlett, database is CAplus.

The photoirradiation of toluene derivatives with two equivalent of bromine in benzotrifluoride-water provided a satisfactory yield of the corresponding benzoic acid derivatives Either a fluorescent lamp, blue LED (454 nm), or UV LED (385 nm) was used for the photoreaction. The reaction pathway might proceed through the dibromination of benzylic carbon, generation of the benzylic radical via oxidative C-H abstraction, formation of benzoyl bromide, and hydrolysis of carboxylic acid.

Synlett 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, Formula: C9H8O4.

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

Zarini, Daniele published the artcileAre In Silico Approaches Applicable As a First Step for the Prediction of e-Liquid Toxicity in e-Cigarettes?, Product Details of C12H14O2, the publication is Chemical Research in Toxicology (2020), 33(9), 2381-2389, database is CAplus and MEDLINE.

Recent studies have raised concerns about e-cigarette liquid inhalation toxicity by reporting the presence of chems. with European Union CLP toxicity classification. In this scenario, the regulatory context is still developing and is not yet up to date with vaping current reality. Due to the paucity of toxicol. studies, robust data regarding which components in tent. In this study we applied computational methods for studied chems. as a useful tool for predicting the acute toxicity of chems. contained in e-liquids The purpose of t the potential health concerns associated with e-liquid ingredients, (b) to prioritize e-liquid ingredients by calculating the e-tox index, and (c) to estimate acute toxicity of e-liquid mixtures QSAR models were generated using QSARINS software to fill the acute toxicity data gap of 264 e-liquid ingredients. As a second step, the potential acute toxicity of e-liquids mixtures was evaluated. Our preliminary data suggest that a computational approa serve as a roadmap to enable regulatory bodies to better regulate e-liquid composition and to contribute to consumer health protection.

Chemical Research in Toxicology 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 C6H8O6, Product Details of C12H14O2.

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

Jang, Yoon-Jung published the artcileDuctile gas barrier poly(ester-amide)s derived from glycolide, COA of Formula: C8H14O4, the publication is Polymer Chemistry (2022), 13(26), 3882-3891, database is CAplus.

Sustainable gas barrier materials, such as polyglycolide, poly(L-lactide), and poly(ethylene 2,5-furandicarboxylate) are important alternatives to traditional plastics used for packaging where low gas permeability is beneficial. However, high degrees of crystallinity in these materials can lead to undesirably low material toughness. We report poly(ester-amide)s derived from glycolide and diamines exhibiting both high toughness and desirable gas barrier properties. These sustainable poly(ester-amide)s were synthesized from glycolide-derived diamidodiols and diacids. To understand the structure-property relationships of the poly(ester-amide)s, polymers with different numbers of methylene groups were compared with respect to thermal, mech., and gas barrier properties. As the number of methylene groups between ester groups increased in the even-numbered series, the melting temperature decreased and oxygen permeability increased. We also found that these polymers are readily degradable under neutral, acidic, and basic hydrolytic conditions. These high-performance poly(ester-amide)s are promising sustainable alternatives to conventional gas barrier materials.

Polymer Chemistry published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, COA of Formula: C8H14O4.

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

Hu, Keling published the artcileOrganocatalyzed Living Radical Polymerization of Itaconates and Self-Assemblies of Rod-Coil Block Copolymers, SDS of cas: 617-52-7, the publication is Macromolecular Rapid Communications (2020), 41(9), 2000075, database is CAplus and MEDLINE.

Organocatalyzed living radical polymerizations of itaconates are studied, yielding low-dispersity linear and star polymers (D = Mw/Mn = 1.28-1.46) up to Mn = 20 000 and monomer conversion = 62%, where Mn and Mw are the number- and weight-average molar masses, resp. The block polymerization with functional methacrylates, an acrylate, and styrene yields various rod-coil block copolymers. Linear A-B diblock, linear B-A-B triblock, and 3-arm star A-B diblock copolymers generate spherical micelles (nanoparticles) and vesicles (nanocapsules), depending on the polymer structures. Itaconates can be derived from bioresources, and thus the obtained polymers may serve as green polymers. Because of the biocompatibility of polyitaconates, the assemblies may serve as biocompatible nanocarriers.

Macromolecular Rapid Communications published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H10O4, SDS of cas: 617-52-7.

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

Fu, Niankai published the artcileElectrocatalytic Radical Dichlorination of Alkenes with Nucleophilic Chlorine Sources, Related Products of esters-buliding-blocks, the publication is Journal of the American Chemical Society (2017), 139(43), 15548-15553, database is CAplus and MEDLINE.

We report a Mn-catalyzed electrochem. dichlorination of alkenes with MgCl₂ as the chlorine source. This method provides operationally simple, sustainable, and efficient access to a variety of vicinally dichlorinated compounds In particular, alkenes with oxidatively labile functional groups, such as alcs., aldehydes, sulfides, and amines, were transformed into the desired vicinal dichlorides with high chemoselectivity. Mechanistic data are consistent with metal-mediated Cl atom transfer as the predominant pathway enabling dual C-Cl bond formation and contradict an alternative pathway involving electrochem. evolution of chlorine gas followed by Cl₂-mediated electrophilic dichlorination.

Journal of the American Chemical Society 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, Related Products of esters-buliding-blocks.

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