Tag: M.W=200-250

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

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

Lin, Geng-Jie published the artcileEnantiodivergent synthesis of trans-3,4-disubstituted succinimides by SmI₂-mediated Reformatsky-type reaction, HPLC of Formula: 106391-88-2, the publication is Tetrahedron Letters (2008), 49(25), 4007-4010, database is CAplus.

An enantiodivergent strategy for the synthesis of trans-3,4-disubstituted succinimides is reported. The key step is a highly trans-stereoselective SmI₂-induced Reformatsky-type reaction of 4-substituted O-benzoylated malimides with carbonyl compounds Double chirality transmissions were performed with good to excellent diastereoselectivities.

Tetrahedron Letters published new progress about 106391-88-2. 106391-88-2 belongs to esters-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Aldehyde, name is (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate, and the molecular formula is C10H19NO3, HPLC of Formula: 106391-88-2.

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

Wang, Xuan published the artcileSelf-polishing antifouling coatings based on benzamide derivatives containing capsaicin, Name: Propyl 3,4,5-trihydroxybenzoate, the publication is Marine Pollution Bulletin (2022), 113844, database is CAplus and MEDLINE.

In this study, N-hydroxymethylbenzamide was alkylated with various aromatic compounds to obtain five novel benzamide derivatives containing capsaicin (BDCC), and the BDCC were incorporated into coatings as auxiliary agents. The relationships between properties and structures were discussed based on exptl. and theor. results. The theor. results showed the optimized configurations of BDCC and confirmed that the benzene ring, phenolic hydroxyl, ester and amide groups were active sites. Exptl. results indicated that the antimicrobial and antifouling effects of compounds b1, b2 and b3 were better than those of chlorothalonil, their MIC and MBC values were no more than 64 and 512 μg·mL^-1, and their test panels were covered only with small amounts of dirt and biofilms; they worked well as green antifouling additives. The exptl. and theor. results showed that BDCC and BDCC antifouling coatings were effective and eco-friendly.

Marine Pollution Bulletin 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 C6H8O3, Name: Propyl 3,4,5-trihydroxybenzoate.

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

Zhao, Man-Tong published the artcileGallic acid and its alkyl esters emerge as effective antioxidants against lipid oxidation during hot air drying process of Ostrea talienwhanensis, Safety of Propyl 3,4,5-trihydroxybenzoate, the publication is LWT–Food Science and Technology (2021), 110551, database is CAplus.

The antioxidant efficiency of gallic acid (GA) and its alkyl esters including Me gallate (MG), Et gallate (EG), Pr gallate (PG), Bu gallate (BG), octyl gallate (OG), lauryl gallate (LG), hexadecyl gallate (HG), and octadecyl gallate (SG) in oyster tissue during hot-air drying process was investigated. Results indicated that GA and its alkyl esters all could effectively retard lipid oxidation in oyster tissue according to peroxide value (POV), thiobarbituric acid reactive substances (TBARS) and free radical intensity. The antioxidant effects increased with the alkyl chain length until OG, thereafter, it gradually decreased. The POV of the OG treated oysters post 10 h of drying was 66.26, 68.90, 77.86, 92.61, 89.45, 70.79, 68.96 and 62.70%, resp., of those treated by GA, MG, EG, PG, BG, LG, HG and SG. The corresponding values for TBARS were 68.72, 76.59, 77.88, 84.32, 86.23, 68.31, 81.24, 77.36%, while 41.19, 58.62, 62.83, 64.49, 69.60, 61.44, 60.05 and 72.61% for free radical intensity. Pearson correlation anal. showed a pos. correlation between the antioxidant effects and the concentrations of the polyphenol compounds in oyster tissue. This report will provide the basic data for selection of suitable antioxidants to improve the oxidation stability of seafood during thermal processing.

LWT–Food Science and Technology 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 C6H8O4, Safety of Propyl 3,4,5-trihydroxybenzoate.

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

Dong, Jiande published the artcileSynthesis and biological imaging of cross-linked fluorescent polymeric nanoparticles with aggregation-induced emission characteristics based on the combination of RAFT polymerization and the Biginelli reaction, Name: Benzyl diethylcarbamodithioate, the publication is Journal of Colloid and Interface Science (2018), 192-199, database is CAplus and MEDLINE.

Fluorescent probes have long been regarded as tools for imaging living organisms with advantages such as high sensitivity, good designability and multifunctional potential. Many fluorescent probes, especially the probes based on aggregation-induced emission (AIE) dyes, have received increasing attention since the AIE phenomenon was discovered. These AIE dye-based fluorescent probes could elegantly overcome the notorious quenching effect caused by aggregation of conventional organic dyes. However, it is still difficult to directly apply these AIE-active dyes for biomedical applications owing to their hydrophobic nature. Therefore, the development of novel and facile strategies to endow them with water dispersibility is of critical importance. In this work, we exploit an efficient and simple strategy to fabricate an AIE dye-based fluorescent copolymer through the combination of reversible addition-fragmentation chain transfer and the Biginelli reaction. Moreover, the copolymer can self-assemble to fluorescent polymeric nanoparticles (FPNs) in water solution Hydrophilic poly(PEGMA-co-AEMA) was reacted with the AIE-active dye 4′,4”’-(1,2-diphenylethene-1,2-diyl)bis([1,1′-biphenyl]-4-carbaldehyde) (CHO-TPE-CHO) to form amphiphilic luminescent polymers using urea as the connection bridge. The successful synthesis of the final products (poly(PEGMA-co-AEMA-TPE) FPNs) was confirmed by various instruments. Furthermore, Transmission electron microscopy (TEM) images manifest that poly(PEGMA-co-AEMA-TPE) copolymers will self-assemble into spherical nanoparticles in aqueous environments with sizes between 100 nm and 200 nm. The cell uptake and bioimaging experiment confirm that poly(PEGMA-co-AEMA-TPE) FPNs have excellent biocompatibility and emit strong green fluorescence in a cellular environment. Thus, poly(PEGMA-co-AEMA-TPE) FPNs are excellent candidates for biomedical applications.

Journal of Colloid and Interface Science 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, Name: Benzyl diethylcarbamodithioate.

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

Dong, Jiande published the artcileUltrafast fabrication of fluorescent organic nanoparticles with aggregation-induced emission feature through the microwave-assisted Biginelli reaction, COA of Formula: C12H17NS2, the publication is Dyes and Pigments (2019), 90-96, database is CAplus.

Because of its unique optical properties, the aggregation-induced emission (AIE) dye has attracted extensive attention for various applications. Especially, the utilization of AIE-active dyes for fabrication of fluorescent organic nanoparticles (FONs) has attracted the most research interest for biomedical applications. Therefore, the development of novel and effective strategies to design and prepare AIE-active FONs should be of great importance for the biomedical applications of AIE-active FONs. In this report, we reported an ultrafast strategy that based on the one-pot microwave-assisted Biginelli reaction for fabrication of AIE-active poly(AA-AEMA-TPE) copolymers, which use the 2-(methacryloyoxy)ethylacete, acrylic acid (AA) and 4′,4”’-(1,2-diphenylethene-1,2-diyl) bis([1,1′-biphenyl]-4-carbaldehyde) (TPE-CHO) as the substrates. The microwave-assisted Biginelli reaction is simple, efficient and atom-economical and can be accomplished within 3 min. Owing to their amphiphilicity, poly(AA-AEMA-TPE) copolymers will self-assemble into FONs with small size and high water dispersibility. The proton NMR (¹H NMR) spectroscopy, UV-Vis spectrum and fluorescence spectrometer were used to characterize the resultant copolymers. We demonstrated that poly(AA-AEMA-TPE) FONs possess many excellent properties, such as high water dispersibility, intense fluorescence, obvious AIE feature and favorable biocompatibility. The above results suggest that poly(AA-AEMA-TPE) FONs are of great potential for fluorescent imaging. Moreover, the microwave-assisted Biginelli reaction can occur under a rather benign environment with high efficiency and good substrate adaptability. Therefore, we believe that the method developed in this work could greatly advance the applications of AIE-active functional materials.

Dyes and Pigments 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, COA of Formula: C12H17NS2.

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

Jiang, Ruming published the artcileFacile construction and biological imaging of cross-linked fluorescent organic nanoparticles with aggregation-induced emission feature through a catalyst-free azide-alkyne click reaction, HPLC of Formula: 3052-61-7, the publication is Dyes and Pigments (2018), 52-60, database is CAplus.

The research in fluorescent organic nanoparticles (FONs) with aggregation-induced emission (AIE) feature shows an upward trend due to their outstanding optical properties and potential biomedical applications. In this work, a novel strategy has been developed for the first time through a catalyst-free azide-alkyne click reaction, which could directly conjugate azide containing polymers (PEGMA-AGE-N₃) and alkyne terminating AIE dye (named as PhE-OE) under mild exptl. conditions. The final PEGMA-AGE-PhE copolymers containing AIE-active dye could self-assemble into FONs with intense fluorescence owing to their AIE feature. These PEGMA-AGE-PhE FONs were characterized by a series of characterization techniques in details. The cell viability as well as cell uptake behavior of PEGMA-AGE-PhE FONs was also examined to evaluate their potential for biomedical applications. We demonstrated that the catalyst-free azide-alkyne click reaction is effective for fabrication of AIE-active FONs and these AIE-active FONs showed high water dispersity and AIE feature. Moreover, the PEGMA-AGE-PhE FONs also exhibited low cytotoxicity and great potential for biol. imaging. Taken together, a facile catalyst-free azide-alkyne click reaction with high efficiency has been developed for the preparation of AIE-active FONs, which showed excellent physicochem. properties for biol. imaging applications.

Dyes and Pigments 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, HPLC of Formula: 3052-61-7.

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

Jiang, Ruming published the artcileFacile fabrication of organic dyed polymer nanoparticles with aggregation-induced emission using an ultrasound-assisted multicomponent reaction and their biological imaging, Synthetic Route of 3052-61-7, the publication is Journal of Colloid and Interface Science (2018), 137-144, database is CAplus and MEDLINE.

Ultrasound as a powerful technique has increasingly been used in both industry and academia in recent years. Herein, an efficient approach to the ultrafast preparation of cross-linked fluorescent copolymers (PEGMA-AEMA-TPE) with aggregation-induced emission (AIE) via an ultrasound-assisted multicomponent reaction (MCR) is described. A number of characterization techniques were carried out to certify the successful preparation of these AIE-active copolymers. Due to the introduction of a hydrophilic PEG fragment and a hydrophobic AIE-active dye, the obtained fluorescent copolymers showed amphiphilic properties and could assemble into organic dyed polymer nanoparticles (ODPNs) with great water dispersibility. The final PEGMA-AEMA-TPE ODPNs demonstrated intense fluorescence, strong photostability, a low critical micelle concentration (CMC) of 0.007 mg mL^-1 and high biocompatibility. More importantly, the PEGMA-AEMA-TPE ODPNs show obvious AIE characteristics, which could elegantly overcome the quenching effect caused by the aggregation of ODPNs based on conventional organic dyes. Considered the above results, we believe that these AIE-active ODPNs should be promising candidates for biol. imaging and other biomedical applications.

Journal of Colloid and Interface Science 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, Synthetic Route of 3052-61-7.

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

Luan, Xuezhu published the artcileExperimental study on toughening of porous cordierite ceramic prepared by particle-stabilized emulsions, Name: Propyl 3,4,5-trihydroxybenzoate, the publication is Materials Today Communications (2022), 103674, database is CAplus.

The majority of work has focused on the toughening of porous cordierite ceramics (PCC), which has a uniform and homogeneous porous structure prepared by the particle-stabilized emulsions after sintering at ∼1300°C for 2 h. The particle sizes of raw materials were adjusted to 20 nm to ensure that all samples maintained the same porous structure, which prevented crack propagation from separating PCC’s bending strength increased by up to ∼214% at ∼4 wt% ZrO₂ content, which absorb energy to improve fracture toughness. The addition of mullite fibers created new intermol. forces between colloidal particles and filler parameters, which played a neg. impact on the stability of the micelle shape, resulting in unsuccessful foaming and toughening. Rod-shaped cordierite crystals with a large aspect ratio were formed on the inner wall of PCC with 3 wt% AlF₃ and created a short network in situ, which improved the bending strength of the tensile structure by strengthening crack deflection and crack bridging.

Materials Today Communications 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, Name: Propyl 3,4,5-trihydroxybenzoate.

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