Esters-buliding-blocks

Niwa, Christine G. published the artcileChemistry and field evaluation of the sex pheromone of ponderosa pine tip moth, Rhyacionia zozana (Lepidoptera: Tortricidae), COA of Formula: C14H26O2, the publication is Environmental Entomology (1987), 16(6), 1287-90, database is CAplus.

Chem. analyses, electroantennograms, and field bioassays were conducted to determine the sex pheromone of the ponderosa pine tip moth. The most abundant pheromone component was E-9-dodecenyl acetate with a lesser amount of E-9-dodecenol also present. While acetate/alc. ratios averaged 70:30 in gland washes, male moths were most attracted to sticky traps with synthetic baits containing ratios ranging from 70:30 to 95:5. Laboratory and field tests suggest that Z-9-dodecenyl acetate may also be a pheromone component. No Z-9-dodecenol was detected using gas chromatog.-mass spectrometry methods.

Environmental Entomology 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, COA of Formula: C14H26O2.

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

Niwa, Christine G. published the artcileSex pheromone chemistry of the southwestern pine tip moth (Lepidoptera: Tortricidae), Quality Control of 16974-11-1, the publication is Environmental Entomology (1992), 21(6), 1410-13, database is CAplus.

Chem. anal. and field bioassays were conducted to identify major components of the sex pheromone of the southwestern pine tip moth, R. neomexicana. E-9-dodecenyl acetate was the most abundant pheromone component in gland washes, with 0.5-1.5 ng per female equivalent Z-9-dodecenyl acetate, and E- and Z-9-dodecenol were also present. A ratio of �0:20 E:Z-9-dodecenyl acetate was the most attractive bait in field trapping. No males were caught in traps baited with a blend of E- and Z-9-dodecenol, and addition of these alcs. at about a 3:1 acetate/alc. ratio did not improve attractiveness to E- and Z-9-dodecenyl acetate baits. The role of pheromones in mating isolation of this species is discussed.

Environmental Entomology 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, Quality Control of 16974-11-1.

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

Flores, Antonia published the artcileDevelopment of a headspace-solid phase micro extraction method for the analysis of volatile and semi-volatile organic compounds from polyurethane resins for leather finishing, Category: esters-buliding-blocks, the publication is Journal of the American Leather Chemists Association (2021), 116(8), 290-297, database is CAplus.

Volatile organic compounds (VOCs) and Semi-Volatile Organic Compounds (SVOCs) arise from the chems. used in the various stages of the leather manufacturing process. An important aim of the tanning industry is to minimize or eliminate VOCs and SVOCs, without lowering the quality of leather. This paper shows the development of a new headspace-solid phase micro extraction coupled with gas chromatog.-mass spectrometry (HS-SPME/GC-MS) method for the identification of VOCs and SVOCs emitted by newly designed polymers for the leather finishing operation. These new polymers are polyurethane resins designed to reduce the VOC and SVOC concentration This method enables a simple and fast determination of the qual. and semi-quant. content of VOCs and SVOCs in polyurethane-type finishing resins. The chems. that are of concern in this paper are the following: Dipropylene glycol Monomethyl Ether (DPGME), DBE-3 (a mixture of dibasic esters) and Triethylamine (TEA). The test conditions that have been determined to carry out the HS-SPME assay are the following: incubation time (2 h), extraction temperature and time (40°C; 5 min) and the desorption conditions (280°C, 50 s). Ten samples of laboratory scale resins were tested by HS-SPME followed by gas chromatog. (GC-MS). DPGME and DBE-3 (a mixture of di-Me adipate, di-Me glutarate and di-Me succinate) have been identified effectively. The compounds are identified by a quant. method using external calibration curves for the target compounds The technique is not effective to determine the TEA compound, since the chromatograms shown poor resolution peaks for the standard

Journal of the American Leather Chemists Association 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, Category: esters-buliding-blocks.

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

Aungtikun, Jirapon published the artcileImproved adulticidal activity against Aedes aegypti (L.) and Aedes albopictus (Skuse) from synergy between Cinnamomum spp. essential oils, Application In Synthesis of 103-26-4, the publication is Scientific Reports (2021), 11(1), 4685, database is CAplus and MEDLINE.

Improved natural adulticidal agents against mosquito vectors are in urgent need, and essential oils from Cinnamomum plants can assume this role quite readily. Cinnamomum verum, C. cassia, and C. loureiroi essential oils (EOs) were extracted from the barks and evaluated for their chem. composition by GC-MS. The major constituent of the three EOs was cinnamaldehyde. WHO susceptibility tests on individual and combined EOs as well as cinnamaldehyde were conducted against female adults of Aedes aegypti and Aedes albopictus. All EO combinations exhibited a synergistic effect, manifesting a higher toxicity, with a synergistic value ranging from 2.9 to 6.7. Their increasing mortality value was improved between 16.0 to 41.7%. The highest synergistic effect was achieved by an EO combination of 0.5% C. cassia + 0.5% C. loureiroi, while the highest insecticidal activity was achieved by 2.5% C. verum + 2.5% C. cassia and 1% cinnamaldehyde, with a knockdown and mortality rate of 100% and a KT50 between 0.7 and 2.1 min. This combination was more toxic to both mosquito species than 1% w/v cypermethrin. These findings demonstrate that cinnamaldehyde and synergistic combinations of C. verum + C. cassia EOs and C. cassia + C. loureiroi EOs have a high insecticidal efficacy against Aedes populations.

Scientific Reports 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, Application In Synthesis of 103-26-4.

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

Xia, Mengling published the artcileCompact and large-area perovskite films achieved via soft-pressing and multi-functional polymerizable binder for flat-panel X-ray imager, Product Details of C15H20O6, the publication is Advanced Functional Materials (2022), 32(16), 2110729, database is CAplus.

Thanks to its strong X-ray absorption and large carrier diffusion length, perovskites have demonstrated excellent performance for X-ray detection. Combination of perovskite with thin-film transistor (TFT) arrays to construct flat-panel X-ray imager (FPXI) is required for X-ray imaging, yet this is rarely reported. Solution processing of perovskite thick film onto TFT can enable the electronic connection, however the amounts of pinholes inevitably form during the solvent evaporation and result in a porous film with deteriorated performance and stability. Here a novel strategy is raised to achieve high-quality perovskite thick films for TFT integration via soft-pressing and in situ polymerization of multi-functional binder (TMTA). The combined process largely eliminates the pinholes, improves the surface smoothness, passivates grains boundaries, reduces ionic migration, and improves stability. Accordingly, a compact and smooth MAPbI₃ thick film integrating with TFT arrays is prepared for flat-panel X-ray imaging. The largest film (28 x 28 cm²) is obtained with the state-of-the-art performance (ratio of sensitivity to noise current: 1.41 x 10¹¹ μC Gy^-1 A^-1) among polycrystalline films. It is hoped that the work provides guidance for fabricating compact perovskite thick films and push perovskite FPXI one step further for low-dose X-ray imaging.

Advanced Functional 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 C7H13ClNNaO5S, Product Details of C15H20O6.

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

Sun, Xianwei published the artcile[1,4]-S- to O-Silyl Migration: Multicomponent Synthesis of α-Thio-Ketones through Chemoselective Transformation of Esters to Ketones with Organolithium Reagents, Recommanded Product: Ethyl 2-mercaptopropanoate, the publication is Chemistry – A European Journal (2013), 19(51), 17589-17594, database is CAplus and MEDLINE.

A [1,4]-S-to-O-silyl migration has been exploited to chemoselectively transform esters into ketones by using organolithium reagents, allowing a multicomponent synthesis of α-(thio)ketones. Mechanistic studies reveal that this migration proceeds in an intramol. manner and is more favorable than a corresponding [1,5]-S-to-O-silyl migration and [1,3]-C-to-O-silyl migration. The resulting α-(thio)alkanone derivatives are valuable building blocks for the synthesis of cyclic or multifunctionalized organosulfur compounds The synthesis of the target compounds was achieved using [(trimethylsilyl)thio]alkanoic acid esters and (alkyl)lithium compounds and alkyl bromides, allyl bromides, iodomethane, propargyl bromide, 2-(bromomethyl)oxirane, 7-oxabicyclo[4.1.0]heptan-2-one (cyclohexene epoxide), etc. as starting materials. The title compounds thus formed included 1-[(phenylmethyl)thio]-2-hexanone, 1-(methylthio)-2-hexanone, 1-[(2-propenyl)thio]-2-propanone, 1-phenyl-2-[(2-propenyl)thio]ethanone, dihydro-3(2H)-thiophenone derivatives The application of this strategy toward a reaction of (thioalkyl)alkanone with amines was demonstrated by the synthesis of 3-(alkylthio)-1H-indole derivatives (Gassman indolization).

Chemistry – A European Journal published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C23H43NP2, Recommanded Product: Ethyl 2-mercaptopropanoate.

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

Fan, Chunying published the artcileChemical compositions and copper(II) adsorption properties of sequentially extracted humic substances, including different humin fractions, Recommanded Product: Isobutyl palmitate, the publication is Fresenius Environmental Bulletin (2018), 27(10), 6485-6499, database is CAplus.

Humin (HU) is the least understood humic substance (HS) fractions due to its close associations with soil mineral colloids. Here, humic acid (HA), fulvic acid (FA), HU, iron-bound HU (HUi), claybound HU (HUc) and residual HU (HUr) were sequentially extracted from an Alfisol of northeast China. Elemental anal., solid-state carbon-13 cross-polarization magic-angle-spinning NMR (13C CPMAS NMR) spectroscopy and pyrolysis-gas chromatog./mass spectrometry (Py-GC/MS) were used to characterize HS fractions. The adsorption isotherms of Cu(II) on HS fractions were obtained using batch equilibrium method. Among these HS fractions, HA contained higher proportion of phenols, whereas HUc exhibited higher proportion of aliphatic hydrocarbons. For the different HU fractions, n-alkanes/n-alkenes were particularly abundant in HUc, whereas polysaccharides were abundant in HUr. The adsorption of Cu(II) on HS fractions well fitted both Freundlich and Langmuir equations. The maximum amounts of Cu(II) adsorbed was FA > HUi > HA > HUc > HU > HUr, which was pos. correlated with their O/C ratio and carbonyl C whereas neg. correlated with C/N ratio (p < 0.01). The results suggested that HU is highly heterogeneous in terms of their chem. compositions and plays important role in controlling the behavior and fate of Cu(II) in the environment.

Fresenius Environmental Bulletin 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 C20H40O2, Recommanded Product: Isobutyl palmitate.

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

Yu, Lu published the artcileRegio- and Enantioselective Formal Hydroamination of Enamines for the Synthesis of 1,2-Diamines, Computed Properties of 924-99-2, the publication is Angewandte Chemie, International Edition (2019), 58(25), 8551-8555, database is CAplus and MEDLINE.

The asym. formal hydroamination of enamines using a CuH catalyst is reported [e.g., enamine I + O-acylhydroxylamine II â†?diamine III (69%, 97:3 e.r.) in presence of (MeO)₂MeSiH as hydride source, Cu(OAc)₂ and (R)-DTBM-SEGPHOS]. The method provides a straightforward and efficient approach to the synthesis of chiral 1,2-dialkyl amines in good yields with high levels of enantioselectivities for a broad range of substrates, and should have significant value for the preparation of mols. bearing a 1,2-diamine motif.

Angewandte Chemie, International Edition published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C12H10O4S, Computed Properties of 924-99-2.

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

Yanagi, Tomoyuki published the artcileNi-Catalyzed Carboxylation of C(sp²)-S Bonds with CO₂: Evidence for the Multifaceted Role of Zn, Product Details of C9H8O4, the publication is ACS Catalysis (2020), 10(3), 2117-2123, database is CAplus.

Nickel-catalyzed reductive carboxylation reactions of aryl electrophiles typically require the use of metallic reducing agents. At present, the prevailing perception is that these serve as both a source of electrons and as a source of Lewis acids that may aid CO₂ insertion into the Ni-C bond. Herein, we provide evidence for the in situ formation of organometallic species from the metallic reductant, a step that has either been ruled out or has been unexplored in catalytic carboxylation reactions with metal powder reductants. Specifically, we demonstrate that Zn(0) acts as a reductant and that Zn(II) generates arylzinc species that might play a role in the C(sp²)-S carboxylation of arylsulfonium salts. Overall, the reductive Ni-catalyzed C(sp²)-S carboxylation reaction proceeds under mild conditions in a non-amide solvent, displays a wide substrate scope, and can be applied to the formal para C-H carboxylation of arenes.

ACS Catalysis 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 C2H4ClNO, Product Details of C9H8O4.

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

Gompper, Rudolf published the artcileThe allopolarization principle and its applications. 1. Acceptor-substituted allyl cations as ambifunctional electrophiles, Formula: C7H13NO2, the publication is Angewandte Chemie (1978), 90(10), 808-10, database is CAplus.

Vinamidinium salts [I; R = H, Me, Ph, CO₂Et, CO₂Me; R¹ = H, Me, Ph, Me₂N, Cl; R² = CO₂Et, CO₂Me, COPh, (MeO)₂CH] are stable to hydrolysis at room temperature Treatment of I [R = R¹ = H; R² = CO₂Et, COPh (II and III)] with NaBH₄ yields R²C(NMe₂):CHCH₂NMe₂ (R² = CO₂Et, COPh). R²C(NMe₂):CHCH:CPhCN (R² as above) are prepared by reaction of II and III with benzyl cyanide (EtOH/NaOEt). II reacts with [PhCH:NCHCO₂Et]^– K⁺ to yield IV.

Angewandte Chemie published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C7H13NO2, Formula: C7H13NO2.

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