Month: November 2022

Reed, D. W. published the artcileAttraction of moth species of Tortricidae, Gelechiidae, Geometridae, Drepanidae, Pyralidae, and Gracillariidae families to field traps baited with conjugated dienes, Synthetic Route of 16974-11-1, the publication is Journal of Chemical Ecology (1985), 11(12), 1645-57, database is CAplus and MEDLINE.

Field surveys of a series of conjugated diunsatd. straight-chain primary alcs., acetates, and aldehydes (dienes), including the 3,5-dodecadienyl, 8,10-dodecadienyl, 3,5-tetradecadienyl, 8,10-tetradecadienyl, 9,11-tetradecadienyl, and 10,12-tetradecadienyl primary alcs., acetates, and most aldehydes, and the related monounsaturated straight-chain primary alcs., acetates, and aldehydes (monoenes), including the 3-dodecadienyl alc. and acetates, attracted various insect species of title families. Diene attractants have been demonstrated for â‰? Phyllonorycter sp., Chionodes lugubrella, Leptostales ferruminaria, Drepana bilineata, Pyrausta fodinalis, Notocelia purpurissatana, and Phaneta alterana. Monoene attractants were demonstrated for Hedya separatana, Cydia fletcherana, Barbara mappana, Ancylis burgessiana, A. nubeculana, Evippe prunifoliella, Phlyctaenia coronata tertialis, a Chionodes sp., a Gelechiidae sp., and an unidentified Phyllonorycter sp. Replicated field experiments showed attraction-inhibition relationships for most species. Electroantennagram data are presented for L. ferruminaria and D. bilineata.

Journal of Chemical Ecology published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Synthetic Route of 16974-11-1.

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

Oyedeji, Ajibola Bamikole published the artcileMetabolite data of germinated Bambara groundnut flour and starch extracted with two different solvents, Computed Properties of 31570-04-4, the publication is Data in Brief (2021), 107288, database is CAplus and MEDLINE.

The data presented in this study represents the profile of metabolites of germinated Bambara groundnut flour (GBF) and starch (GBS) extracted using two different extraction solvents. Bambara groundnuts obtained from a local agro market in Minna, Niger State, Nigeria were germinated at 28 ± 1°C for 24, 48 and 72 h, dried and then processed into flour and starch. Raw Bambara groundnuts (0 h) were also processed into flour and starch and served as controls. Samples at the different germination times were extracted using methanol/water (80:20vol./volume) and acetonitrile/methanol/water (40:40:20 volume/volume/v), concentrated, reconstituted and analyzed on a gas chromatog.-high resolution time of flight-mass spectrometer (GC-HRTOF-MS). Data obtained were classified into compound groups such as acids, alcs., cyclic compounds, esters, ketones, phytosterols, vitamins and many others, and their characteristics such as the retention time, observed mass, mol. formular and mean peak areas were reported. These data represent the collection of metabolites in GBF and GBS and may be useful for the identification and utilization of functional compounds in foods.

Data in Brief 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, Computed Properties of 31570-04-4.

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

Sun, Jingcan published the artcileDetermination of Flavor Esters in Enzymatically Transformed Coconut Oil, Safety of Isobutyl palmitate, the publication is Journal of Food Biochemistry (2013), 37(6), 654-660, database is CAplus.

The lipase-catalyzed transesterification of coconut oil with fusel oil was investigated in this study. Various aroma-active octanoic acid esters, such as ethyl-, butyl-, propyl-, isobutyl- and (iso)amyl octanoate, were synthesized in addition to other esters. To determine the amount of flavor esters, a simple yet effective sample preparation method through refrigeration was developed to sep. valuable fatty acid esters from monoglycerides, diglycerides and triglycerides. With this sample preparation method, gas chromatog. coupled with mass spectrometry and flame ionization detector was applied to determine flavor esters in transesterified coconut oil with a total run time of 51 min. The levels of coefficient of variation were within 2% and the recovery rates were in the range of 89.5-100.0%, indicating good accuracy and high precision. The sample preparation and quantification method established appears to be useful for the determination of a wide range of fatty acid esters in oil samples. PRACTICAL APPLICATIONS : Fatty acid esters, especially short-chain fatty acid esters, are important flavoring agents applied in the food industry. Using lipase as the biocatalyst to synthesize desirable flavor fatty acid esters from lipids and alcs. is gaining the interest of researchers, since the esters formed by this method are deemed as natural. The reaction equilibrium was achieved at around 20 h. For industrial production of flavor fatty acid esters, it is essential to monitor the amount of these target compounds in the reaction solutions In this study we developed a simple and effective quantification method to determine the esters in transesterified coconut oil which may also be applicable for the anal. of esters in other oil samples such as lipid-derived biofuels.

Journal of Food Biochemistry published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C2H8Cl2N4S2, Safety of Isobutyl palmitate.

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

Liu, Man published the artcileStructures and dynamic properties of the LiPF₆ electrolytic solution under electric fields – a theoretical study, Name: Ethyl (2,2,2-trifluoroethyl) carbonate, the publication is Physical Chemistry Chemical Physics (2019), 21(24), 13186-13193, database is CAplus and MEDLINE.

Fluorinated carbonates have attracted increasing attention in high-voltage lithium ion battery applications. Under free and elec. fields, their structure-related solvent dynamic properties such as charge and discharge rate, however, are rarely reported. Herein, solutions including linear fluorinated carbonates have been simulated using joint MD/DFT calculations For the first time, the dielec. constants of the four pure fluorinated carbonates have been predicted to be ca. 5.4 (4: ethyl-2,2,2-trifluoroethyl carbonate)-12.1 (7: di-1,1,2,2,2-pentafluoroethyl carbonate), which are dependent on the number of fluorine atoms. Minor difference in the solvation free energies and few contact ion associations were observed in the ETFEC and DTFEC solvents. Their comparable viscosity values were found through calculations of ion diffusivity and conductivity In the elec. fields, the Li⁺ mobilities in the two solutions have similar values, showing that the dynamic properties of the electrolytic solutions are almost independent of the number of fluorine atoms on these carbonates. There emerges an oriented and ordered arrangement of the solvent mols. and thus the largely decreased dielec. constants under the elec. fields, even though the field strength is very low. These interesting phenomena should be relevant in the formation of contact and aggregate ion pairs, leading to unexpected reduction of the charge-discharge rate-related ion mobility in mixed solvents.

Physical Chemistry Chemical Physics 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, Name: Ethyl (2,2,2-trifluoroethyl) carbonate.

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

Li, Jieni published the artcileFACTORS ASSOCIATED WITH SWITCHING FROM INJECTABLE TO ORAL DISEASE MODIFYING AGENTS AMONG PATIENTS WITH MULTIPLE SCLEROSIS, Category: esters-buliding-blocks, the publication is Multiple Sclerosis and Related Disorders (2022), 103703, database is CAplus and MEDLINE.

Since the introduction of oral disease-modifying agents (DMA) in 2010, the treatment options for multiple sclerosis (MS) have changed significantly. There is limited information regarding the factors associated with switching to oral DMA among prevalent injectable DMA users. This study evaluated the factors associated with switching to oral DMAs among prevalent injectable DMA users with MS. A retrospective observational cohort study using the TriNetX electronic medical records (EMR) data was conducted among patients with MS. The study included prevalent injectable DMA users with at least two injectable DMA (interferon beta-1a, interferon beta-1b, peginterferon beta-1a, or glatiramer acetate) prescription records within 6 mo between Sept. 2010 and May 2018. The second injectable DMA prescription date was considered as the index date. Switching was defined as any oral DMA prescription record (fingolimod, di-Me fumarate, or teriflunomide) within 12 mo after the index date. Patients with any infusion DMA prescription after the first injectable DMA prescription, and those less than 18 years of age were excluded from the study. The Andersen Behavioral Model was used as the conceptual framework to identify predisposing, enabling, and need factors measured during the 1-yr baseline period before the index date. A multivariable logistic regression model was used to examine the predisposing (age, sex, race, and ethnicity), enabling (time-period), and need factors (comorbidities, MS symptoms, MS-related medication, and healthcare utilization) associated with switching from injectable to oral DMAs. Among 2,943 prevalent injectable users included in this study, 8.09% (n=238) patients switched to oral DMAs. Patients who switched to oral DMAs were primarily younger adults aged 18-44 years (64.29%), females (82.77%), had sensory and visual symptoms, and had corticosteroid utilization during the one-year look-back period compared to non-switchers. Results from multivariable logistic regression model revealed that middle-aged adults (45-64 years, adjusted odds ratio [aOR]: 0.43, 95% Confidence Interval [CI]: 0.32-0.58), old adults (�5 years, aOR: 0.30, 95% CI: 0.13-0.66) and men (aOR: 0.67, 95% CI: 0.47-0.96) were associated with decreased odds of switching to oral DMAs. Presence of MS-related sensory symptoms (aOR: 1.52, 95% CI: 1.07-2.16), visual symptoms (aOR: 1.59, 95% CI: 1.10-2.31), and corticosteroids usage (aOR: 1.44, 95% CI: 1.04-1.98) were associated with increased odds of switching to oral DMAs. The study found that about one in twelve prevalent injectable DMA users switched to oral DMA. Both demog. and clin. factors were associated with switching to oral DMAs. Further research is needed to evaluate the outcomes of switching to inform treatment decisions for MS management.

Multiple Sclerosis and Related Disorders 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, Category: esters-buliding-blocks.

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

Bai, Feng published the artcileSynthesis and Characterization of Isoregic Chiral Smectic Polyesters, Recommanded Product: Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, the publication is Chemistry of Materials (1999), 11(7), 1666-1671, database is CAplus.

We prepared a series of isoregic chiral smectic polyesters based on (R)-(-)-4′-{ω-[2-(p-hydroxy-o-nitrophenyloxy)-1-propoxy]-1-alkyloxy}-4-biphenylcarboxylic acid. The head-to-tail (p-hydroxybenzoic acid) type monomers enable us to proceed the isoregically controlled polycondensation. All the monomers exhibited the chiral smectic C and nematic mesophases. The isoregic chiral smectic polyesters have good thermal stability and exhibit monolayered chiral smectic C and smectic A structures.

Chemistry of Materials published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Recommanded Product: Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate.

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

Moad, Graeme published the artcileLiving free radical polymerization with reversible addition – fragmentation chain transfer (the life of RAFT), Product Details of C12H17NS2, the publication is Polymer International (2000), 49(9), 993-1001, database is CAplus.

Free radical polymerization with reversible addition-fragmentation chain transfer (RAFT polymerization) is discussed with a view to answering the following questions: (a) How living is RAFT polymerization. (b) What controls the activity of thiocarbonylthio compounds in RAFT polymerization. (c) How do rates of polymerization differ from those of conventional radical polymerization. (d) Can RAFT agents be used in emulsion polymerization. Retardation, observed when high concentrations of certain RAFT agents are used and in the early stages of emulsion polymerization, and how to overcome it by appropriate choice of reaction conditions, are considered in detail. Examples of the use of thiocarbonylthio RAFT agents in emulsion and miniemulsion polymerization are provided.

Polymer International 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, Product Details of C12H17NS2.

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

Jang, Sungchan published the artcileDimethyl Itaconate Reduces α-MSH-Induced Pigmentation via Modulation of AKT and p38 MAPK Signaling Pathways in B16F10 Mouse Melanoma Cells, Computed Properties of 617-52-7, the publication is Molecules (2022), 27(13), 4183, database is CAplus and MEDLINE.

Di-Me itaconate (DMI) exhibits an anti-inflammatory effect. Activation of nuclear factor erythroid 2-related factor 2 (NRF2) is implicated in the inhibition of melanogenesis. Therefore, DMI and itaconic acid (ITA), classified as NRF2 activators, have potential uses in hyperpigmentation reduction The activity of cyclic adenosine monophosphate (cAMP) response element-binding protein (CREB), an important transcription factor for MITF gene promoter, is regulated by glycogen synthase kinase 3β (GSK3β) and protein kinase A (PKA). Here, we investigated the inhibitory effect of ITA and DMI on alpha-MSH (α-MSH)-induced MITF expression and the modulatory role of protein kinase B (AKT) and GSK3β in melanogenesis in B16F10 mouse melanoma cells. These cells were incubated with α-MSH alone or in combination with ITA or DMI. Proteins were visualized and quantified using immunoblotting and densitometry. Compared to ITA, DMI treatment exhibited a better inhibitory effect on the α-MSH-induced expression of melanogenic proteins such as MITF. Our data indicate that DMI exerts its anti-melanogenic effect via modulation of the p38 mitogen-activated protein kinase (MAPK) and AKT signaling pathways. In conclusion, DMI may be an effective therapeutic agent for both inflammation and hyperpigmentation.

Molecules 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, Computed Properties of 617-52-7.

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

Hsu, Shih-Hsin published the artcileHigh-Speed One-Photon 3D Nanolithography Using Controlled Initiator Depletion and Inhibitor Transport, Product Details of C15H20O6, the publication is Advanced Optical Materials (2022), 10(4), 2102262, database is CAplus.

Additive manufacturing of sophisticated 3D nanoscale objects commonly uses femtosecond lasers to photopolymerize a light-sensitive resin using multi-photon absorption. This nonlinear process provides high accuracy and flexibility in advanced 3D fabrication; however, it typically has limited throughput and high cost. This work makes use of a one-photon-based dosage-nonlinearity to fabricate 3D nanostructures, demonstrating a cost-effective method for 3D nanolithog. using a low-cost 405 nm continuous-wave diode laser. This dosage-nonlinearity is achieved by using controlled depletion of photo-initiation species in an environment containing inhibiting species. By controlling multiple competing processes, the undesired dose accumulation outside the writing voxel is stopped, and thereby this method creates a confined writing voxel in space. A multiphysics model is developed to numerically study the one-photon nonlinear photopolymerization process, which is compared with exptl. results.

Advanced Optical Materials published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Product Details of C15H20O6.

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

Aryal, Vivek published the artcileNi-Catalyzed Regio- and Stereoselective Alkylarylation of Unactivated Alkenes in γ,δ-Alkenylketimines, Recommanded Product: Dimethyl fumarate, the publication is ACS Catalysis (2022), 12(12), 7262-7268, database is CAplus.

Authors disclose a Ni-catalyzed vicinal alkylarylation of unactivated alkenes in γ,δ-alkenylketimines with aryl halides and alkylzinc reagents. The reaction produces γ-C(sp³)-branched δ-arylketones with the construction of two C(sp³)-C(sp³) and C(sp³)-C(sp²) bonds. Electron-deficient alkenes play crucial dual roles as ligands to stabilize reaction intermediates and to increase catalytic rates for the formation of C(sp³)-C(sp³) bonds. This alkene alkylarylation reaction is also effective for secondary alkylzinc reagents and internal alkenes and proceeds with a complete regio- and stereocontrol, affording products with up to three contiguous all-carbon all-cis secondary stereocenters.

ACS Catalysis 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, Recommanded Product: Dimethyl fumarate.

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