Tag: M.W=150-200

Bozejewicz, Daria published the artcile2,6-bis((benzoyl-R)amino)pyridine (R = H, 4-Me, and 4-NMe2) derivatives for the removal of Cu(II), Ni(II), Co(II), and Zn(II) ions from aqueous solutions in classic solvent extraction and a membrane extraction, Recommanded Product: Ethyl 4-dimethylaminobenzoate, the publication is Membranes (Basel, Switzerland) (2021), 11(4), 233, database is CAplus and MEDLINE.

In this paper, the application of new substituted 2,6-bis((benzoyl-R)amino)pyridine (R = H, 4-Me, and 4-NMe₂) derivatives for the recovery of copper(II), nickel(II), cobalt(II), and zinc(II) ions from aqueous solutions was described. The structures of the synthesized compounds were confirmed by NMR spectroscopy (NMR), electrospray ionization high-resolution mass spectrometry (ESI HRMS), and tandem mass spectrometry methods (HCD MS/MS). Three different derivatives of 2,6-bis((benzoyl-R)amino)pyridine were used as carriers in membrane processes and as extractants in classic solvent extraction In each case, the single derivative recovery was carried out on a model solution that contained only one type of metal ions. Spectrophotometry studies were performed to determine the stability constants of the complexes formed by the synthesized species with analyzed metals ions. The results obtained indicate that the synthesized compounds form stable complexes with Cu(II), Ni(II), Co(II), and Zn(II) ions and can be used in both types of studied recovery processes. However, the effectiveness of the synthesized compounds in the recovery of metal ions depends both on the structure of compounds and properties of metals as well as on their concentration

Membranes (Basel, Switzerland) 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, Recommanded Product: Ethyl 4-dimethylaminobenzoate.

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

Balanuca, Brindusa published the artcileExploring the potential of inexpensive high oleic sunflower oil for new polymeric architectures, Formula: C11H15NO2, the publication is Polymers for Advanced Technologies (2021), 32(4), 1813-1821, database is CAplus.

Bicomponent polymeric architectures were fabricated through visible-light polymerization starting from methacrylated and PEGylated high oleic sunflower oil (HO-SFO) monomers and compatible polyethylene glycol dimethacrylate (PEG-DMA) capable of swelling in biol. simulated fluid. Conversion of the methacryl moieties in the photo-polymerization reactions was monitored by FTIR spectrometry and also gel fraction measurements. The amount of PEG-DMA co-reactant and PEG units grafted on the HO-SFO backbone were found to directly influence the key properties of the oil-based polymers. DSC measurements proved that higher content of PEG-DMA (1:1wt, related to HO-SFO monomer) influence the crystallinity degree, favoring also the increase of PBS absorption capacity. PEG chains from the HO-SFO structure acts as mediator for the hydrophobic and hydrophilic components, influencing the system mobility, networks arrangement, affording the higher degree for PBS absorption (almost 70% after 50 days of immersion). For all the studied systems two-phase absorption process was observed and assigned to the esters hydrolysis, yielding new -COOH and -OH groups, XPS and SEM confirming this hypothesis. Polymers degradation during PBS immersion conduce to the elimination of PEG oligomers and unreacted methacryl moieties from the fatty acids, by diffusion in the swelling medium, phenomenon supported by detectable architectural changes from the SEM images.

Polymers for Advanced Technologies 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, Formula: C11H15NO2.

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

Geesi, Mohammed H. published the artcileMetal-doped TiO₂ nanocatalysts in an MX₂/urea mixture for the synthesis of benzothiazoles bearing substituted pyrrolidin-2-ones: enhanced catalytic performance and antibacterial activity, SDS of cas: 617-52-7, the publication is Journal of Environmental Chemical Engineering (2021), 9(4), 105344, database is CAplus.

Pyrrolidinone derivatives I (R = Ph, 2-MeC₆H₄, 4-HOC₆H₄, 3-Cl-4-FC₆H₃, etc.) were synthesized by reacting various arylamines RNH₂ with di-Me itaconate using water as the solvent in a microwave. The obtained pyrrolidinone derivatives I were further reacted with 2-aminothiophenol under microwave irradiation with the assistance of a deep eutectic mixture (CuCl₂ or NiCl₂/urea) and Cu- or Ni-doped TiO₂ nanoparticles to afford the final derivatives II incorporating both pyrrolidin-2-one and benzothiazole rings. To determine the optimum reaction conditions, the effects of temperature, solvent nature, and reaction time were investigated. Under the optimal operation conditions, high reaction yields were achieved. The developed strategy exhibited advantages of a short reaction time, eco-friendliness, and high productivity. Finally, the obtained derivatives II were examined in terms of their antibacterial potential against selected Gram-neg. and Gram-pos. bacterial strains: all the derivatives II, except for II (R = 4-MeOC₆H₄), exhibited activity against the tested bacteria.

Journal of Environmental Chemical Engineering 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

Riadi, Yassine published the artcileEfficient novel eutectic-mixture-mediated synthesis of benzoxazole-linked pyrrolidin-2-one heterocycles, COA of Formula: C7H10O4, the publication is Journal of Molecular Liquids (2021), 115011, database is CAplus.

In this study, new benzoxazole-linked pyrrolidinone heterocyclic compounds I [R = H, 2-Me, 3-Cl-4-F, etc.] were synthesized by an eco-efficient strategy using substituted benzylamines and 2-aminophenol under ultrasonic irradiation in the presence of a newly designed metal-free deep eutectic solvent (DES). This DES was prepared by using a eutectic mixture of urea and a synthesized glycine-derived ionic liquid X-ray diffraction and IR spectroscopy were employed to investigate the structure of the ionic liquid and characterize the DES, resp. This method exhibited key advantages of high productivity, a short reaction time, and simple processing. Moreover, this DES was easily separated from reaction mixtures and could be recycled for multiple reactions.

Journal of Molecular Liquids 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, COA of Formula: C7H10O4.

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

Stamm, Arne published the artcilePinene-based oxidative synthetic toolbox for scalable polyester synthesis, Computed Properties of 617-52-7, the publication is JACS Au (2021), 1(11), 1949-1960, database is CAplus and MEDLINE.

Generation of renewable polymers is a long-standing goal toward reaching a more sustainable society . Herein we show how conceptually simple oxidative transformations can be used to unlock the inherent reactivity of terpene synthons in generating polyesters by two different mechanisms starting from the same α-pinene substrate. In the first pathway, α-pinene was oxidized into the bicyclic verbanone based lactone (VaL) and subsequently polymerized into star-shaped polymers via ring-opening polymerization, resulting in a biobased semicrystalline polyester with tunable glass transition and melting temperatures In a second pathway, polyesters were synthesized via polycondensation, utilizing the diol (1-(1′-hydroxyethyl)-3-(2′-hydroxyethyl)-2,2-dimethylcyclobutane (HHDC)) synthesized by oxidative cleavage of the double bond of α-pinene, together with unsaturated biobased diesters such as di-Me maleate (DMM) and di-Me itaconate (DMI), resp. The resulting families of terpene-based polyesters were thereafter successfully crosslinked by either transetherification, utilizing the terminal hydroxyl groups of the synthesized verbanone-based materials, or by UV-irradiation, utilizing the unsaturation provided by the DMM or DMI moieties within the HHDC-based copolymers. This work highlights the potential to apply an oxidative toolbox to valorize inert terpene metabolites enabling generation of bio sourced polyesters and coatings thereof by complementary mechanisms.

JACS Au 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 C16H14O6, Computed Properties of 617-52-7.

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

Mahato, Sanjit K. published the artcileIridium(III)-Catalyzed Direct Intermolecular Chemoselective α-Amidation of Masked Aliphatic Carboxylic Acids with Dioxazolones via Nitrene Transfer, Product Details of C8H14O4, the publication is ACS Catalysis (2021), 11(12), 7126-7131, database is CAplus.

The Ir(III)-catalyzed direct α-C-H amidation of imidazole-masked aliphatic carboxylic acids I [R = H, Me; R¹ = n-Bu, cyclopentylmethyl, 4-bromophenyl, 1H-indol-3-ylmethyl, etc.; RR¹ = -(CH₂)₃-, -(CH₂)₄-] with dioxazolones II (R² = n-Pr, 4-bromophenyl, 2-phenylethyl, furan-2-yl, etc.) for the preparation of amidated imidazoles III is reported. The presence of an imidazole moiety as a directing group is a key to the success of the reaction. The products III (R = H; R¹ = n-Bu; R² = Ph) can be easily converted to N-(1-oxo-1-(pentylamino)hexan-2-yl)benzamide and N-((1,1,1,3,3,3-hexafluoropropan-2-yl)oxy)benzamide in a simple procedure. The reaction shows a broad substrate scope for various substituted 2-acylimidazoles I, as well as a variety of dioxazolone derivatives II with important functional groups being tolerated. The reaction mechanism was investigated by deuterium-labeling experiments, Hammett plots, NMR, and FAB-MS, and propose the generation of an iridium nitrene intermediate.

ACS Catalysis 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, Product Details of C8H14O4.

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

Kurouchi, Hiroaki published the artcileSynthesis of Medium-Ring-sized Benzolactams by Using Strong Electrophiles and Quantitative Evaluation of Ring-size Dependency of the Cyclization Reaction Rate, Name: Dimethyl adipate, the publication is Journal of Organic Chemistry (2020), 85(2), 876-901, database is CAplus and MEDLINE.

Benzolactams with medium-sized rings were synthesized via electrophilic aromatic substitution reaction of carbamoyl cations (R₁R₂N⁺=C=O) in good to high yields without dilution These reactions were utilized to quant. examine the extent of retardation of medium-sized ring formation, compared to 5- or 6-membered ring formation. The order of reaction rates of formation of cyclic benzolactams is 6- > 5- > 7- > 8- > 9-membered ring at 25°. The present reaction provides a route to 8- and 9-membered benzolactams.

Journal of Organic 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, Name: Dimethyl adipate.

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

Sakai, Kentaro published the artcileA Germanium Catalyst Accelerates the Photoredox α-C(sp³)-H Alkylation of Primary Amines, Name: Dimethyl itaconate, the publication is Organic Letters (2022), 24(18), 3325-3330, database is CAplus and MEDLINE.

Site-selective C(sp³)-H functionalizations using photoredox catalysis (PC) and hydrogen atom transfer (HAT) catalysis have received increasing attention. Here, a Ph₂GeCl₂ cocatalyst that greatly improves the yield of αC(sp³)-H alkylation of primary amines e.g., 3-phenylpropan-1-amine catalyzed by a PC-HAT hybrid system has been reported. The α-position of the amino group selectively reacted even when weaker C-H bonds existed in the substrates. This finding may help the design of a novel site-selective hybrid catalysis.

Organic Letters 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, Name: Dimethyl itaconate.

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

Hamada, Tomohito published the artcileImproved Synthesis of Unsymmetrical Carbonate Derivatives Using Calcium Salts, Product Details of C5H7F3O3, the publication is Organic Process Research & Development (2019), 23(4), 667-673, database is CAplus.

An effective synthetic method for unsym. carbonate species has been developed. Calcium oxide and calcium hydroxide were found to be highly effective for this reaction, affording unsym. carbonates in high yield and purity. Calcium chloride, which is a coproduct, serves as a water scavenger that can be easily removed. Addnl. drying processes and complicated purification steps are not necessary in this reaction. This improved process is important in terms of green sustainable chem. principles.

Organic Process Research & Development published new progress about 156783-96-9. 156783-96-9 belongs to esters-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is Ethyl (2,2,2-trifluoroethyl) carbonate, and the molecular formula is C5H7F3O3, Product Details of C5H7F3O3.

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

Maekawa, Hirofumi published the artcileReductive carboxylation of aromatic esters by electron transfer from magnesium metal, Recommanded Product: Ethyl 3,5-difluorobenzoate, the publication is Tetrahedron Letters (2017), 58(3), 206-209, database is CAplus.

Magnesium-promoted reductive carboxylation of Et benzoates in the presence of chlorotrimethylsilane in N,N-dimethylformamide brought about a new carbon-carbon bond formation between the carbonyl carbon atom and carbon dioxide to give the corresponding benzoylformic acids in good yield. It is noteworthy that only Et benzoates with substituents at the meta-position were converted into benzoylformic acid derivatives Moreover, no mandelic acid was detected even under the reductive conditions. This result indicates that benzoylformic acid was obtained after hydrolysis of a carboxylated intermediate, which would exist as a stabilized structure in the reaction media.

Tetrahedron Letters published new progress about 350-19-6. 350-19-6 belongs to esters-buliding-blocks, auxiliary class Fluoride,Benzene,Ester, name is Ethyl 3,5-difluorobenzoate, and the molecular formula is C9H8F2O2, Recommanded Product: Ethyl 3,5-difluorobenzoate.

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