Tag: M.W=150-200

Nagarkar, Rahul A. published the artcileEfficient Process for the Production of Alkyl Esters, Application of Dimethyl adipate, the publication is ACS Omega (2022), 7(32), 28129-28137, database is CAplus.

This article reports a scalable process development for the production of alkyl esters through the esterification route by utilizing fly ash as a catalyst. The catalyst consisting of mixed oxides such as alumina, iron oxide, calcium oxide, magnesium oxide, and silica was employed for the esterification reaction without modification. The catalyst was evaluated for the conversion of feedstock containing variable amounts of free fatty acids, mono/dibasic acid, and alc./polyols into the corresponding alkyl esters. Three types of fly ash catalysts, viz., FS-1, FP-1, and FC-1, were chosen from three different industrial sources. Synthesis of di-Me adipate was studied as a model reaction. FS-1 fly ash gave the highest yield of di-Me adipate, whereas FC-1 gave a low yield of di-Me adipate. The recyclability of FS-1 was evaluated for three cycles, and no loss of yield was observed Furthermore, the catalyst FS-I was found to be capable of producing good yields for various esterification reactions with different substrates.

ACS Omega 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, Application of Dimethyl adipate.

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

Samatov, Aizat A. published the artcileVaporization/sublimation enthalpies of mono- and dimethyl-esters estimated by solution calorimetry method, Application of Dimethyl adipate, the publication is Thermochimica Acta (2020), 178529, database is CAplus.

The additive scheme for calculating the solvation enthalpies of aliphatic compounds has been developed for linear mono- and dimethyl-esters. Ester group contribution to the enthalpy of solvation in n-heptane was obtained. Accuracy of the proposed approach for determination of solvation enthalpies of linear mono- and dimethyl-esters was tested by comparison with exptl. solvation enthalpies. In most cases, deviations do not exceed 1 kJ·mol^-1. It was found that the dependence of the solution enthalpies of mono- and dimethyl-esters on the number of carbon atoms in the mol. can be fitted by power function. This dependence and a group-additivity scheme for solvation enthalpy were used for estimation of the enthalpies of phase transitions of mono- and dimethyl-esters. Evaluated values of sublimation, vaporization, and fusion enthalpies at 298.15 K are in good agreement with exptl. data obtained by conventional methods.

Thermochimica Acta 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, Application of Dimethyl adipate.

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

Solomonov, Boris N. published the artcileFusion enthalpies of benzoic acid derivatives, aromatic and heteroaromatic carboxylic acids as a tool for estimation of sublimation enthalpies at 298.15 K, Name: 3-(Methoxycarbonyl)benzoic acid, the publication is Fluid Phase Equilibria (2016), 93-100, database is CAplus.

In this work a method of estimation of sublimation enthalpies of benzoic acid derivatives and aromatic or heteroaromatic carboxylic acids was developed. The method is based on calculation of sublimation enthalpy from fusion enthalpy of studied compound and of benzoic acid at corresponding melting temperatures and sublimation enthalpy of benzoic acid at 298.15 K. Calculated sublimation enthalpy values of benzoic acid derivatives containing CH₃-, CH₃O-, F-, Cl-, Br-, I-, NO₂– and other substituents, 1- and 2-naphthoic acids and heteroaromatic carboxylic acids (38 compounds in total) were compared with literature data (at 298.15 K) obtained by conventional methods. In most cases, divergence does not exceed 2-3%.

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 C17H20ClN3, Name: 3-(Methoxycarbonyl)benzoic acid.

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

Yagofarov, Mikhail I. published the artcileNew aspects in the thermochemistry of solid-liquid phase transitions of organic non-electrolytes, Name: 3-(Methoxycarbonyl)benzoic acid, the publication is Journal of Molecular Liquids (2018), 58-66, database is CAplus.

Thermochem. of solid-liquid phase transitions plays an important role in solidification studies of polymers, metals, inorganic salts, and low-mol. organic compounds Enthalpy of fusion is a source of information about intermol. interactions in materials, crystallinity, mixtures phase diagrams shape, heat transfer in the solidification interval. The present paper is devoted to relationship between the fusion enthalpies of aromatic compounds at the melting temperature and the solution enthalpies in benzene at 298.15 K. Sublimation and vaporization thermochem. are used as an addnl. source of information about the latter relationship. Depending on the magnitude of deviation between the solution enthalpies in benzene at 298.15 K and fusion enthalpies at the melting temperature, aromatic compounds are conventionally divided into three groups. For a large number of aromatic compounds not capable of self-association the equality between the fusion enthalpies at the melting temperature and the solution enthalpies in benzene at 298.15 K is established. For self-associated aromatic compounds the solution enthalpy in benzene at 298.15 K exceeds the fusion enthalpy at the melting temperature, and insertion of a substituent not forming inter- and intramol. hydrogen bonds does not affect the difference between the solution and fusion enthalpies. The enthalpies of solution in benzene at 298.15 K of several aromatic compounds not capable of self-association appear to be visibly less than the fusion enthalpies at the melting temperature The reasons of different relationships between the fusion and solution enthalpies are analyzed using Kirchhoff’s law for the fusion enthalpy.

Journal of Molecular Liquids 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 C3H12Cl2N2, Name: 3-(Methoxycarbonyl)benzoic acid.

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

Danton, Fanny published the artcileSite-Selective Pd-Catalysed Fujiwara-Moritani type Reaction of N,S-Heterocyclic Systems with Olefins, Recommanded Product: Dimethyl itaconate, the publication is Advanced Synthesis & Catalysis (2021), 363(4), 1088-1095, database is CAplus.

Dihydro-1,4-thiazine skeletons bearing olefin fragment at their α-position were prepared through a Pd(OAc)₂-catalyzed Fujiwara-Moritani type reaction via C-H alkenylation with olefins. This approach is selective, generalizable to a wide range of olefins and requires only 1 equivalent of Ag₂CO₃ without the need of co-oxidant. The C-H bond activation proved to be strongly dependent on the olefin’s substitution while unfused dihydro-1,4-thiazines seemed to be affected by the oxidation state of the sulfur atom. The utility of olefins obtained was demonstrated by their implication in the dipolar cycloaddition reaction with a non-stabilized azomethine ylide.

Advanced Synthesis & Catalysis 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, Recommanded Product: Dimethyl itaconate.

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

Rahal, Mahmoud published the artcileNaphthalimide-Based Dyes as Photoinitiators under Visible Light Irradiation and their Applications: Photocomposite Synthesis, 3D printing and Polymerization in Water, Name: Ethyl 4-dimethylaminobenzoate, the publication is ChemPhotoChem (2021), 5(5), 476-490, database is CAplus.

In this work, six new fluorescent dyes derived from the naphthalimide scaffold (Napht1-Napht6) were synthesized and used as high-performance photoinitiating systems (PISs) in two and three-component systems (combined with iodonium salt (Iod) and/or an electron donor amine (such as N-phenylglycine[NPG])) for the radical photopolymerization of acrylate and methacrylate monomers under visible light using a light-emitting diode at 405 nm. Markedly, these dyes were never synthesized before. In fact, these PISs showed high initiation efficiency with both demonstrating high final reactive function conversions and high polymerization rates. A further interest of our study is to determine the effect of the different substituents (chromophoric group) on the naphthalimide function, concerning the efficiency of initiation of the free radical polymerization In order to improve the mech. properties of the obtained polymers, these derivatives were also tested for the photopolymerization of a blend of acrylate/epoxy monomers (TA/EPOX); these latter properties were characterized by traction tests. To demonstrate the initiation efficiency of these dyes, several methods and characterization techniques were used, including steady state photolysis, real-time Fourier transform IR spectroscopy, emission spectroscopy as well as cyclic voltammetry. In our study, these naphthalimides were used for the synthesis of photocomposites (one and multiple layers of glass fibers) using a UV@395 nm (4 W/cm2) conveyor, as well as in the preparation of 3D printed polymers. Markedly, one of the naphthalimide derivatives (Napht-4) can be used as a new high-performance water soluble photoinitiator for photopolymerization in water and hydrogel synthesis.

ChemPhotoChem 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, Name: Ethyl 4-dimethylaminobenzoate.

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

Schumacher, Christian published the artcileMechanochemical Syntheses of N-Containing Heterocycles with TosMIC, HPLC of Formula: 103-26-4, the publication is Journal of Organic Chemistry (2021), 86(20), 14213-14222, database is CAplus and MEDLINE.

A mechanochem. van Leusen pyrrole synthesis with a base leads to 3,4-disubstitued pyrroles in moderate to excellent yields. The developed protocol is compatible with a range of electron-withdrawing groups and can also be applied to the synthesis of oxazoles. Attempts to mechanochem. convert the resulting pyrroles into porphyrins proved to be difficult.

Journal of Organic Chemistry 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 C10H2F12NiO4, HPLC of Formula: 103-26-4.

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

Dasgupta, Sudip published the artcileHydroxyapatite-collagen nanoparticles reinforced polyanhydride based injectable paste for bone substitution: effect of dopant addition in vitro, Computed Properties of 10287-53-3, the publication is Journal of Biomaterials Science, Polymer Edition (2021), 32(10), 1312-1336, database is CAplus and MEDLINE.

The present study focuses on the synthesis and characterization of hydroxyapatite-collagen nanoparticles incorporated polyanhydride paste and investigating its bone regeneration capacity in vitro. Si, Sr, and both Si/Sr doped hydroxyapatite-collagen nanoparticles to the extent 10 wt% were added to polyanhydride monomer mixture containing 40 wt% MSA, 40 wt% MCPH and 10 wt% PEGDA and subsequently photopolymerized as previously mentioned. Incorporation of hydroxyapatite-collagen nanoparticles to the extent of 10 wt% into polyanhydride matrix enhanced compressive strength of the hardened paste from 30 to 49 MPa. MTT assay showed that mesenchymal stem cell proliferation was significantly higher in Si/Sr binary doped hydroxyapatite-collagen-polyanhydride sample as compared to other samples. Again from immunocytochem. study using confocal images suggested that expression of osteocalcin, a marker indicating differentiation into osteoblast, was the highest in Si/Sr binary doped hydroxyapatite-collagen-polyanhydride sample against the other samples studied in this case. This study thus summarizes the development of photocurable biocomposites containing polyanhydride and Si, Sr doped hydroxyapatite-collagen nanoparticles that exhibited tremendous promise to regenerate bone tissues in complex-shaped musculoskeletal defect sites.

Journal of Biomaterials Science, Polymer Edition 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, Computed Properties of 10287-53-3.

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

Isayama, Shigeru published the artcileA new method for preparation of alcohols from olefins with molecular oxygen and phenylsilane by the use of bis(acetylacetonato)cobalt(II), COA of Formula: C12H14O2, the publication is Chemistry Letters (1989), 1071-4, database is CAplus.

In the presence of a catalytic amount of bis(acetylacetonato)cobalt(II), various olefins react smoothly with mol O and phenylsilane at room temperature to afford the corresponding alcs. in good yields under neutral conditions. E.g., reaction of PhCO₂CH₂CH:CMe₂ with PhSiH₃, O₂, and Co(acac)₂ in THF at room temperature gave a mixture of 3% PhCO₂CH₂CH₂CMe₂OOSiH₂Ph and 93% PhCO₂CH₂CH₂CMe₂OH.

Chemistry Letters 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, COA of Formula: C12H14O2.

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

Urquilla, Andromeda published the artcileSynthesis and Biological Activity of 2-(2-Amino-2-phenylethyl)-5-oxotetrahydrofuran-2-carboxylic Acid: A Microwave-Assisted 1,3-Dipolar Cycloaddition Approach, COA of Formula: C7H10O4, the publication is Synlett (2021), 32(17), 1735-1740, database is CAplus.

The microwave-assisted 1,3-dipolar cycloaddition of furanyl and benzyl oximes RCH=NOH (R = furan-2-yl, Ph) and several Me acrylates R¹C(=CH₂)C(O)OCH₃ [R¹ = 3-methoxy-3-oxopropyl, 2-methoxy-2-oxoethyl] effectively provided several isoxazolines I when mediated by diacetoxyiodobenzene. The selected isoxazolines I, methyl-5-(3-methoxy-3-oxopropyl)-3-phenyl-4,5-dihydro isoxazole-5-carboxylate, was rapidly transformed to the γ-lactone carboxylic acid, 2-(2-amino-2-phenylethyl)-5-oxotetrahydrofuran-2-carboxylic acid, in reasonable yield. The biol. activity of this γ-lactone carboxylic acid increased the growth of E. coli organisms by about 44% and has a potential significance in stem cell research.

Synlett 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 C5H10BNO2, COA of Formula: C7H10O4.

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