Tag: M.W=200-250

Zhang, Zhanhui published the artcileSynthesis and characterization of optically active, main-chain, liquid crystalline polyesters, Quality Control of 50670-76-3, the publication is Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) (1999), 40(2), 880-881, database is CAplus.

Optically active, main-chain, liquid crystalline polyether-polyesters were prepared via room temperature polymerization The samples of the polyester had number-average mol.-weights 12,000-41,900 g/mol, the weight-average mol.-weights 24,500-135,000 g/mol and T_g 37-39° as determined by DSC anal. The polymers could be solution-cast into tough, flexible films or spun into fibers. Thermogravimetric anal. (TGA) of the polymers showed a 5% weight loss at 315-330°, indicating that these chiral polyesters have good thermal stability. The liquid crystalline phases of both the monomer and the polymer were studied by polarized light microscope (PLM).

Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) 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 C18H15N3O3, Quality Control of 50670-76-3.

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

Bayram, Nesrin Ecem published the artcilePhenolic and free amino acid profiles of bee bread and bee pollen with the same botanical origin – similarities and differences, SDS of cas: 121-79-9, the publication is Arabian Journal of Chemistry (2021), 14(3), 103004, database is CAplus.

In this study, the chem. profile of bee pollen (BP) and bee bread (BB) samples collected from the same beehive were analyzed by LC-MS/MS (liquid chromatog. technique coupled with tandem mass spectrometry), providing the identification of 23 phenolic compounds and 42 free amino acids (FAAs). Rutin was the phenolic compound with the highest rate of occurrence in both BP and BB samples. However, concentrations of protocatechuic acid, 2,5-dihydroxybenzoic acid and kaempferol compounds were significantly higher in BB samples than in BP samples from the same hive probably as result of microbial activity and glycosides degradation The obtained data revealed that the phenolic profiles of the samples differ not only by the type of a product but also by region. Among FAAs proline was the predominant compound in all the analyzed BP and BB samples followed by L-asparagine (BP samples) and L-aspartic acid (BP and BB samples). A high content of proline can be used as a parameter of sample freshness. Also, Principal Component Anal. (PCA) and Cluster anal. proved the possibility of using phlorizin as a chemotaxonomic marker for Rosaceae (Malus or Prunus genus) pollen presence in BP1 sample. In addition, amino acid profile had higher impact on BP and BB sample differentiation due to lower FAAs content in BB samples probably caused by microbial activity. To the best of our knowledge, this study is the first to compare the individual phenolic compounds and free amino acids of bee pollen and bee bread samples with the same botanical origin (predominantly originated from plants belonging to the following families: Asteraceae, Fabaceae, Plantaginaceae and Rosaceae).

Arabian Journal of 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, SDS of cas: 121-79-9.

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

Ockun, Mehmet Ali published the artcileComparative evaluation of phenolic profile and antioxidant activity of new sweet cherry (Prunus avium L.) genotypes in Turkey, Formula: C10H12O5, the publication is Phytochemical Analysis (2022), 33(4), 564-576, database is CAplus and MEDLINE.

Sweet cherry (Prunus avium L.), one of the most consumed fruits in the world, is rich in phenolic and especially anthocyanin content. The aim of this study was to evaluate the phenolic properties of 11 different sweet cherry genotypes collected from Giresun, Turkey. Total phenol, flavonoid, anthocyanin and antioxidant properties were observed spectrophotometrically in three different extraction (conventional, microwave-assisted and ultrasound-assisted) processes. Major phenolic, anthocyanin and antioxidant structures were visually assessed by high-performance thin layer chromatog. (HPTLC). Various phenolics in its structure were determined by liquid chromatog.-tandem mass spectrometry (LC-MS/MS). T2 and E5 genotypes had the highest content in terms of total phenol, flavonoid, anthocyanin and antioxidant activity. In HPTLC, cherry samples contained high levels of chlorogenic acid, neochlorogenic acid, p-coumaroylquinic acid, rutin and cyanidin-3 rutinoside. Among the phenolics examined in the LC-MS/MS method, the major compounds in the structure of cherry were found to be chlorogenic acid, rutin and catechin. The T2 genotype had higher phenolics than the other cherry samples (chlorogenic acid 19.3 mg/100 g; catechin; 3.8 mg/100 g; rutin 33.1 mg/100 g). As a result, T2 and E5 genotypes had higher phenolic and antioxidant activity compared to other genotypes and com. cultivars. It can be said that the antioxidant contents of these genotypes are due to the high anthocyanin amount in their structures. In addition, T2 genotype contained more major phenolics than other cherries. In the next stage, it is recommended to carry out studies on the cultivation of these two varieties.

Phytochemical Analysis 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, Formula: C10H12O5.

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

Azizi, Najmadin published the artcileAn efficient synthesis of dithiocarbamates under ultrasound irradiation in water, Computed Properties of 3052-61-7, the publication is Monatshefte fuer Chemie (2012), 143(8), 1171-1174, database is CAplus.

Multicomponent reactions with ultrasonic activation were used as a simple, rapid, atom economic, and green method for the synthesis of dithiocarbamate derivatives in water. The one-pot, three-component condensation of primary and secondary amines with carbon disulfide and unsaturated carbonyl compounds or alkyl halides under ultrasonic irradiation was developed as a green and fast protocol for the rapid high-yielding preparation of dithiocarbamates in water.

Monatshefte fuer Chemie 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, Computed Properties of 3052-61-7.

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

Azizi, Najmadin published the artcileA highly efficient synthesis of dithiocarbamates in green reaction media, Safety of Benzyl diethylcarbamodithioate, the publication is RSC Advances (2012), 2(19), 7413-7416, database is CAplus.

A deep eutectic solvent (DES) and polyethylene glycol (PEG), promoted the environmentally friendly and fast synthesis of dithiocarbamate derivatives via a one-pot, three-component condensation of an amine, carbon disulfide, and a variety of electrophilic reagents in high yields and short reaction times without organic solvents and tedious work-up. These green solvents can be recovered and recycled for subsequent reactions.

RSC Advances 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, Safety of Benzyl diethylcarbamodithioate.

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

Dominguez, Eduardo published the artcileIntegrated phenotypic and activity-based profiling links Ces3 to obesity and diabetes, Application In Synthesis of 50670-76-3, the publication is Nature Chemical Biology (2014), 10(2), 113-121, database is CAplus and MEDLINE.

Phenotypic screening is making a comeback in drug discovery as the maturation of chem. proteomics methods has facilitated target identification for bioactive small mols. A limitation of these approaches is that time-consuming genetic methods or other means are often required to determine the biol. relevant target (or targets) from among multiple protein-compound interactions that are typically detected. Here, the authors have combined phenotypic screening of a directed small-mol. library with competitive activity-based protein profiling to map and functionally characterize the targets of screening hits. Using this approach, the authors identify carboxylesterase 3 (Ces3, also known as Ces1d) as a primary mol. target of bioactive compounds that promote lipid storage in adipocytes. The authors further show that Ces3 activity is markedly elevated during adipocyte differentiation. Treatment of two mouse models of obesity-diabetes with a Ces3 inhibitor ameliorates multiple features of metabolic syndrome, illustrating the power of the described strategy to accelerate the identification and pharmacol. validation of new therapeutic targets.

Nature Chemical Biology 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, Application In Synthesis of 50670-76-3.

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

Wu, Qiye published the artcileSynthesis of benzyl N, N-diethyldithiocarbamate and photopolymerization of styrene and methyl methacrylate with BDC as iniferter, Recommanded Product: Benzyl diethylcarbamodithioate, the publication is Suliao Gongye (2000), 28(4), 1-3, 11, database is CAplus.

Benzyl N, N-diethyldithiocarbamate (BDC) was prepared from sodium N,N-diethyldithiocarbamate and benzyl chloride, and used as iniferter in the photopolymerization of styrene and Me methacrylate. The conversion of styrene or Me methacrylate increased with increasing photopolymerization time in nonlinear mode and ambient temperature The viscosity-average mol. weight (Mμ) of PMMA and polystyrene increased linearly with the extension of photopolymerization time. The polymer had broad mol. weight distribution and the polymerization was living radical polymerization Styrene-Me methacrylate block copolymer was obtained using BDC as iniferter.

Suliao Gongye 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 C10H9NO, Recommanded Product: Benzyl diethylcarbamodithioate.

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

Hori, Ryo published the artcileLight-Driven Phase Transition in a Cubic Phase-Forming Binary System Composed of 4′-n-Docosyloxy-3′-nitrobiphenyl-4-carboxylic Acid and an Azobenzene Derivative, Related Products of esters-buliding-blocks, the publication is Chemistry – A European Journal (2012), 18(24), 7346-7350, S7346/1-S7346/30, database is CAplus and MEDLINE.

By means of photoisomerization of a doped azobenzene derivative, the authors have for the first time demonstrated the light-driven bi-continuous cubic SmC (SmC-Cub_bi) phase transition, in which a 1D-organized SmC phase structure is switched reversibly to and from the 3D-organized structure of the Cub_bi phase. At the SmC-Cub_bi phase transition, several functions, such as optical property and viscosity, change dramatically, and thus it is anticipated that the UV-responsive Cub_bi systems could be multifunctional soft materials. Furthermore, it should be stressed that the methodol. of simply using binary mixtures containing an azobenzene derivative can avoid the synthetic difficulty that impedes the development of such UV-responsive Cub_bi systems.

Chemistry – A European Journal 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, Related Products of esters-buliding-blocks.

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

Renou, M. published the artcileElectrophysiological investigations of pheromone-sensitive sensilla in the hybrids between two moth species, Product Details of C14H26O2, the publication is Journal of Insect Physiology (1996), 42(3), 267-77, database is CAplus.

Thirteen pheromone compounds or pheromone analogs were screened on the antennal trichoid sensilla of males in French populations of Agrotis ipsilon, A. segetum and in hybrids between female A. ipsilon and male A. segetum produced in the laboratory Six functional types of trichoid sensilla were identified. Type 1 sensilla were characterized by the presence of a single receptor cell tuned to Z7-12:Ac. Type 2 sensilla housed 2 pheromone receptor cells. One cell was tuned to Z5-10:Ac; the other cell was less specifically tuned to Z8-12:Ac and showed various levels of responses to Z5-12:Ac, Z5-10:OH, Z11-16:Ac, and Z11-16:Ald. The receptor neurons in type 3 sensilla responded to Z5-12:Ac. Type 4 sensilla contained a neuron tuned to Z9-14:Ac and Z9-12:Ac. Only 1 sensillum in A. ipsilon was found to house a receptor cell responding to Z9-12:Ac (type 5). Finally, neurons in type 6 sensilla did not respond to any of the compounds The pheromone detection systems of parent species and hybrids were compared. The main difference between the 2 species was the distribution of type 1 and 2 sensilla. Type 1 sensilla were the most numerous (61.5%) and were found mainly on the branches of the antenna in A. ipsilon and the 1st generation hybrids. On the contrary, type 2 sensilla were more abundant (61.3%) in A. segetum where they stood principally on the antennal branches. Type 3 sensilla were present only in A. segetum and the hybrids, while type 4 sensilla were found only in A. ipsilon and the hybrids. Concerning cell specificity and sensillum distribution, the pheromone detection system of hybrids was very close to that of A. ipsilon. A. segetum is known for geog. variability in its communication system and a comparison is made with other populations.

Journal of Insect Physiology 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, Product Details of C14H26O2.

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

Benn, M. H. published the artcileThe sex pheromone of the silver Y moth Chrysodeixis eriosoma (Doubleday) in New Zealand, Synthetic Route of 16974-11-1, the publication is Zeitschrift fuer Naturforschung, C: Journal of Biosciences (1982), 37C(11-12), 1130-5, database is CAplus.

The major components of the sex pheromone of C. eriosoma were identified as 7Z– and 9Z-dodecenyl acetates, in ∼97:3 ratio. This blend was attractive to C. eriosoma males in the field and in a laboratory flight tunnel. 5Z-Dodecenyl acetate and 7Z-dodecenyl alc. inhibited this response in the field. C. eriosoma Was also attracted to the 5:1 blend of 7Z-dodecenyl acetate and 9Z-tetradecenyl acetate reported as the pheromone of C. chalcites in the western Palearctic. Specialist receptor cells for all 5 compounds were found in male antennal sensilla in both species.

Zeitschrift fuer Naturforschung, C: Journal of Biosciences 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