Esters-buliding-blocks

Renou, Michel published the artcileA comparative study of sex pheromone reception in the Hadeninae (Lepidoptera: Noctuidae), Recommanded Product: (Z)-Dodec-9-en-1-yl acetate, the publication is Physiological Entomology (1991), 16(1), 87-97, database is CAplus and MEDLINE.

A comparative study of the olfactory responses to pheromone compounds was performed in 24 species of Hadeninae. Electroantennograms (EAG) were recorded on male moths in response to 30 compounds, and the response profiles of each species were analyzed by factorial correspondence anal. A limited number of mols. were found active, and the most effective stimuli were Z9-tetradecenes and Z11-hexadecenes. The species of the Mythimna genus were most sensitive to aldehydes. Tholera decimalis did not respond to any of the mols. tested. The species belonging to the Mamestra and the Orthosia genera responded to a variety of mols., and no simple correlation was found between the genus and the EAG sensibility. Pheromone reception is discussed in relation to the taxonomy and the evolution of olfactory communication in Hadeninae.

Physiological 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, Recommanded Product: (Z)-Dodec-9-en-1-yl acetate.

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

Khasimuddin, Syed published the artcileQuantitative bioassays for sex pheromone analysis in Spodoptera exempta (Wlk.) (Lepidoptera, Noctuidae), and laboratory evidence of cross-attraction among three species, Formula: C14H26O2, the publication is Insect Science and Its Application (1984), 5(4), 325-8, database is CAplus.

The courtship behavior of male S. exempta was quantified and used as a method of bioassay for the female sex pheromone. Virgin females become attractive to sexually mature males from 72 h after emergence and henceforth their attractiveness increases gradually until they have mated. Mated females start losing their attractiveness to males gradually after mating and 72-96 h after mating they cannot produce any courtship response in males. Among virgin females, crude pheromone-gland extract, and synthetic pheromone compounds, it is the older live females and the crude extract at 0.1 female equivalent that produce highest responses in males. A certain degree of cross-attraction among 3 coexisting species was noted, by using live insects as well as synthetic pheromone compounds of these species in laboratory bioassays. Possible interspecific pheromone-related implications are discussed.

Insect Science and Its Application 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, Formula: C14H26O2.

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

Zhang, Weixin published the artcilePolymer stabilized cholesteric liquid crystal siloxane for temperature-responsive photonic coatings, Recommanded Product: Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, the publication is International Journal of Molecular Sciences (2020), 21(5), 1803, database is CAplus and MEDLINE.

Temperature-responsive photonic coatings are appealing for a variety of applications, including smart windows. However, the fabrication of such reflective polymer coatings remains a challenge. In this work, we report the development of a temperature-responsive, IR-reflective coating consisting of a polymer-stabilized cholesteric liquid crystal siloxane, applied by a simple bar coating method. First, a side-chain liquid crystal oligosiloxane containing acrylate, chiral and mesogenic moieties was successfully synthesized via multiple steps, including preparing precursors, hydrosilylation, deprotection, and esterification reactions. Products of all the steps were fully characterized revealing a chain extension during the deprotection step. Subsequently, the photonic coating was fabricated by bar-coating the cholesteric liquid crystal oligomer on glass, using a mediator liquid crystalline mol. After the UV-curing and removal of the mediator, a transparent IR reflective polymer-stabilized cholesteric liquid crystal coating was obtained. Notably, this fully cured, partially crosslinked transparent polymer coating retained temperature responsiveness due to the presence of non-reactive liquid-crystal oligosiloxanes. Upon increasing the temperature from room temperature, the polymer-stabilized cholesteric liquid crystal coating showed a continuous blue-shift of the reflection band from 1400 nm to 800 nm, and the shift was fully reversible.

International Journal of Molecular Sciences 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 C5H10O2S, Recommanded Product: Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate.

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

Zhang, Di published the artcileA likely protective effect of dimethyl itaconate on cerebral ischemia/reperfusion injury, Name: Dimethyl itaconate, the publication is International Immunopharmacology (2019), 105924, database is CAplus and MEDLINE.

As a membrane-permeable derivative of itaconate, di-Me itaconate (DMI) was recently showed to limit inflammatory response of activated macrophages, and to decrease the generation of reactive oxygen species and reduce cardiac ischemia/reperfusion injury. However, the effect of DMI in the context of cerebral ischemia/reperfusion injury remains unclear. Here, we treated the transient middle cerebral artery occlusion (tMCAO) mice with DMI or saline at the beginning of occlusion, and allowed them to recover for 3 days. We found that DMI obviously decreased the neurol. deficit score. Further, DMI significantly inhibited the toxic conversion of the peri-infarct microglia, and decreased the protein level of interleukin 1β. The present findings suggest that DMI might be recognized as a promising candidate for the treatment of ischemic stroke.

International Immunopharmacology 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 C5H10O, Name: Dimethyl itaconate.

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

Hu, Jian published the artcileHighly active catalysts of bisphosphine oxides for asymmetric Heck reaction, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), the publication is Chemical Communications (Cambridge, United Kingdom) (2013), 49(82), 9425-9427, database is CAplus and MEDLINE.

Bisphosphine oxides formed highly active asym. Heck catalysts, which were applied in asym. synthesis of pharmacol. active azacycles. E.g., reaction of 2-naphthyl triflate with cyclopentene in the presence of 2.5% Pd(dba)₂ and 3% of chiral ligand, (R)-7-bis(m-xylyl)phosphino-7′-bis(3,5-dimethylphenyl)phosphinyl-1,1′-spirobiindane, in 1,4-dioxane with N-ethyldiisopropylamine at 50° to give 95% yield of (S)-3-(2-naphthyl)cyclopentene. Olefin insertion proceeded via cis pathways, different from P,N-ligands.

Chemical Communications (Cambridge, United Kingdom) published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate).

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

Paridala, Kumaraswamy published the artcileTandem one-pot CO₂ reduction by PMHS and silyloxycarbonylation of aryl/vinyl halides to access carboxylic acids, Quality Control of 1877-71-0, the publication is Chemical Communications (Cambridge, United Kingdom) (2018), 54(82), 11574-11577, database is CAplus and MEDLINE.

The present study disclosed the synthesis of aryl/vinyl carboxylic acids from Csp²-bound halides (Cl, Br, I) in a carbonylative path by using silyl formate (from CO₂ and hydrosilane) as an instant CO-surrogate. Hydrosilane provided hydride for reduction and its oxidation product silanol served as a coupling partner. Mono-, di-, and tri-carboxylic acids were obtained from the corresponding aryl/vinyl halides.

Chemical Communications (Cambridge, United Kingdom) 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, Quality Control of 1877-71-0.

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

Wang, Yongtao published the artcile1,5,7-Triazabicyclo[4.4.0]dec-5-ene Enhances Activity of Peroxide Intermediates in Phosphine-Free α-Hydroxylation of Ketones, SDS of cas: 517-23-7, the publication is Angewandte Chemie, International Edition (2021), 60(12), 6631-6638, database is CAplus and MEDLINE.

The critical role of double hydrogen bonds was addressed for the aerobic α-hydroxylation of ketones catalyzed by 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD), in the absence of either a metal catalyst or phosphine reductant. Exptl. and theor. investigations were performed to study the mechanism. In addition to initiating the reaction by proton abstraction, a more important role of TBD was revealed, i.e., to enhance the oxidizing ability of peroxide intermediates, allowing DMSO to be used rather than commonly used phosphine reductants. Further characterizations with nuclear Overhauser effect spectroscopy (NOESY) confirmed the presence of double hydrogen bonds between TBD and the ketone, and kinetic studies suggested the attack of dioxygen on the TBD-enol adduct to be the rate-determining step. This work should encourage the application of TBD as a catalyst for oxidations

Angewandte Chemie, International Edition published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C9H4F6O, SDS of cas: 517-23-7.

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

Lu, Yongling published the artcileInhibitory Activity on the Formation of Reactive Carbonyl Species in Edible Oil by Synthetic Polyphenol Antioxidants, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate, the publication is Journal of Agricultural and Food Chemistry (2021), 69(32), 9025-9033, database is CAplus and MEDLINE.

Food lipids play an important role in food quality, and their attributes contribute to texture, flavor, and nutrition. However, high-temperature processing leads to lipid peroxidation, degradation, and the formation of reactive carbonyl species (RCS), such as acrolein (ACR), glyoxal (GO), and methylglyoxal (MGO). We investigated the changes in the peroxidation value (POV), Rancimat induction time, formation and total amount of RCS, and inhibitory effects of synthetic polyphenol antioxidants on ACR/GO/MGO in plant oils during heating processing through an accelerated oxidation test using Rancimat. With increasing temperature and heating time, the amounts of ACR, GO, and MGO in oil increased and the level of ACR was about several times higher than that of GO and MGO. We also found that some amounts of ACR, GO, and MGO were produced at the initial stage before reaching the peak value of POV, even before oil oxidative rancidity, and the common antioxidant Bu hydroxyanisole (BHA)/butylated hydroxytoluene (BHT) could not remove them once they were generated. This is first time to purify PG-ACR-MGO and elucidate the structure based on anal. of their high resolution mass spectrometry and ¹H, ¹³C, and two-dimensional NMR. We further found that PG rather than BHT and BHA efficiently trapped ACR, OG, and MGO to form adducts in oil and roasted beef burgers with corn oil. Addnl., after incubation at 80°C, the trapping order of PG was as follows: ACR, MGO, and GO, and the adduct of PG-ACR was formed within 1 min; after 10 min, PG-MGO was generated; and three adducts formed at 15 min. However, PG could not trap ACR, GO, or MGO to form adducts at room temperature This study provided novel knowledge to advance our understanding of the ability of synthetic polyphenol antioxidants to scavenge RCS simultaneously, such as ACR, MGO, and GO. Our findings demonstrated that PG, as an inhibitor of RCS, is suitable for medium- and high-temperature food processing but not for normal-temperature storage.

Journal of Agricultural and Food Chemistry published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate.

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

Li, Najun published the artcileSynthesis and third-order NLO properties of polymethacrylates containing pendent azobenzene groups, Product Details of C23H28N2O4, the publication is High Performance Polymers (2007), 19(3), 356-367, database is CAplus.

Six azobenzene monomers containing methacrylate groups were prepared and characterized. The monomers varied by having alkyl spacers of varying lengths and either nitro or methoxy substituents in conjugation with the azo groups. The monomers were polymerized via atom transfer radical polymerization (ATRP) to give polymethyacrylates with pendent azobenzene groups. The pendent azobenzene groups were separated from the polymer backbone by alkyl spacing groups of varying lengths. The side-chain nonlinear optical (NLO) polymers with variable and controllable mol. weight and low polydispersity (1.2-1.4) were obtained. The kinetics of ATRP for each azo monomer was also studied. The third-order NLO property of azo monomers and their polymers were measured using the degenerated four wave mixing technique. Each of the polymers exhibited relatively high χ⁽³⁾ value and rapid response times. The effects of the substituent and spacer length on the ATRP of the methacrylate monomers and the effect of mol. weight on the third-order NLO property of polymers were investigated.

High Performance Polymers published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C23H28N2O4, Product Details of C23H28N2O4.

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

Xue, Tanlong published the artcileA bis-acrylate functionalized enone as photoinitiator and crosslinker in photopolymerization, Synthetic Route of 15625-89-5, the publication is Progress in Organic Coatings (2022), 106587, database is CAplus.

Enone dyes have gained considerable interest in photoinitiation systems due to their facile synthesis, good light absorption, and photobleaching ability during photopolymerization However, besides acting as photoinitiator, little work was dedicated to developing new function for enone dyes in polymer synthesis by photopolymerization In this work, a bis-acrylate functionalized enone derivative (C3POAC) was synthesized and characterized, which is expected to serve not only as a photoinitiator but also as a crosslinker. Steady state photolysis was carried out to show the high photochem. reactivity of C3POAC with an amine co-initiator. The initiation efficiency of C3POAC towards different acrylate monomers was evaluated by real-time FTIR technol. In most cases, good polymerization profiles were obtained. In addition, C3POAC presented the dual role of photoinitiator and crosslinker in the photopolymerization of Bu acrylate.

Progress in Organic Coatings 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 C7H16Cl2Si, Synthetic Route of 15625-89-5.

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