Tag: M.W=200-250

Otsu, Takayuki published the artcileFeatures of living radical polymerization of vinyl monomers in homogeneous system using N,N-diethyldithiocarbamate derivatives as photoiniferters, HPLC of Formula: 3052-61-7, the publication is European Polymer Journal (1995), 31(1), 67-78, database is CAplus.

The radical polymerizations of styrene, Me methacrylate, Me acrylate, vinyl acetate, acrylonitrile and methacrylonitrile were carried out in the presence of N,N-diethyldithiocarbamate photoiniferters. The effects of the photoiniferter structure on the polymerizations were investigated as well as the effects of the conditions, such as monomer and iniferter concentrations, polymerization temperature and light wavelength. The appropriate conditions for the living radical polymerizations of these monomers were determined Stabilization of the iniferter site at the chain end was also attempted.

European Polymer Journal 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

Marchyk, Nataliya published the artcileOne-pot synthesis of iniferter-bound polystyrene core nanoparticles for the controlled grafting of multilayer shells, HPLC of Formula: 3052-61-7, the publication is Nanoscale (2014), 6(5), 2872-2878, database is CAplus and MEDLINE.

A novel approach using one-pot synthesis for the production of uniform, iniferter-bound polystyrene core nanoparticles of size 30-40 nm is described. Conventional oil-in-water emulsion polymerization of styrene and divinylbenzene, combining a hybrid initiation system (thermal and UV), triggered sequentially, was employed to form the surface-bound thiocarbamate iniferters in situ. The iniferter cores were then used as seeds for re-initiating further polymerization by UV irradiation to produce water-compatible core-shell nanoparticles. Grafting of various shell-types is demonstrated: linear polymers of poly(N-isopropylacrylamide) brushes, crosslinked polymers bearing different surface charges and molecularly imprinted polymers. The shell thickness was readily tuned by varying the monomers’ concentration and polymerization time. Our method is straightforward and in addition, gives access to the preparation of fluorescent seeds and the possibility of grafting nanosized multiple shells. The core-shell nanoparticles were fully characterized by dynamic light scattering, transmission electron microscopy, Fourier transform IR spectroscopy and microelemental anal.

Nanoscale 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

Chiefari, John published the artcileThiocarbonylthio Compounds (S:C(Z)S-R) in Free Radical Polymerization with Reversible Addition-Fragmentation Chain Transfer (RAFT Polymerization). Effect of the Activating Group Z, SDS of cas: 3052-61-7, the publication is Macromolecules (2003), 36(7), 2273-2283, database is CAplus.

Free-radical polymerization in the presence of suitable addition-fragmentation chain transfer agents [S:C(Z)S-R] (RAFT agents) possess the characteristics of a living polymerization (i.e., polymer products can be reactivated for chain extension and/or block synthesis, mol. weights are predetermined by RAFT agent concentration and conversion, narrow polydispersities are possible). Styrene polymerizations (110 °C, thermal initiation) were performed for two series of RAFT agents [S:C(Z)S-CH₂Ph and S:C(Z)S-C(Me)₂CN]. The chain transfer coefficients decrease in the series where Z is Ph > SCH₂Ph ∼ SMe ∼ Me ∼ N-pyrrolo ≫ OC₆F₅ > N-lactam > OC₆H₅ > O(alkyl) ≫ N(alkyl)₂ (only the first five in this series provide narrow polydispersity polystyrene (< 1.2) in batch polymerization). More generally, chain transfer coefficients decrease in the series dithiobenzoates > trithiocarbonates ∼ dithioalkanoates > dithiocarbonates (xanthates) > dithiocarbamates. However, electron-withdrawing substituents on Z can enhance the activity of RAFT agents to modify the above order. Thus, substituents that render the oxygen or nitrogen lone pair less available for delocalization with the C:S can substantially enhance the effectiveness of xanthates or dithiocarbamates, resp. The trend in relative effectiveness of the RAFT agents is rationalized in terms of interaction of Z with the C:S double bond to activate or deactivate that group toward free radical addition MO calculations and the estimated LUMO energies of the RAFT agents can be used in a qual. manner to predict the effect of the Z substituent on the activity of RAFT agents.

Macromolecules 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, SDS of cas: 3052-61-7.

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

Fiandanese, Vito published the artcileA general approach to the synthesis of monoolefinic insect sex pheromones of Z- or E-configuration, Application In Synthesis of 16974-11-1, the publication is Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) (1985), 1115-19, database is CAplus.

Several insect sex pheromones and structurally related alkenes were prepared by 2 sequential cross-coupling reactions starting from (Z)- or (E)-BrCH:CHSPh [(Z)- or (E)-I]. Z-Isomers were prepared by sequential cross-coupling of (Z)-I with 2 Grignard reagents in the presence of [PdCl₂(PPh₃)₂] (II) and [NiCl₂(dppe)] [III; dppe = (Ph₂PCH₂)₂], resp., whereas E-isomers were prepared by sequential cross-coupling of (E)-I with Grignard reagents in the presence of III. E.g., sequential treatment of (Z)-I with Me(CH₂)₁₂MgBr in the presence of II and Me(CH₂)₇MgBr in the presence of III in Et₂O at room temperature gave 75% (Z)-Me(CH₂)₁₂CH:CH(CH₂)₇Me, the sex pheromone of the housefly.

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) 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, Application In Synthesis of 16974-11-1.

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

Groot, Astrid T. published the artcileHost strain specific sex pheromone variation in Spodoptera frugiperda, Product Details of C14H26O2, the publication is Frontiers in Zoology (2008), No pp. given, database is CAplus and MEDLINE.

The fall armyworm Spodoptera frugiperda consists of 2 distinct strains with different host plant preferences for corn and rice. To assess whether pheromonal-mediated behavioral isolation accompanies the habitat isolation on different host plants, we compared the sex pheromone composition among females of the 2 strains. Pheromone glands were extracted with or without injection of pheromone biosynthesis activating neuropeptide (PBAN). To assess the mode of inheritance of this variation, we also analyzed the pheromone composition of F₁ hybrid females. Relative to intra-strain variation, the pheromone composition of the 2 strains differed significantly. Corn strain females contained significantly more of the 2nd most abundant pheromone compound Z11-16:Ac (m), and significantly less of most other compounds, than rice strain females. When females were injected with PBAN before their glands were extracted, the differences between the strains were less pronounced but still significant. The pheromone composition of hybrid females showed a maternal inheritance of the major component Z9-14:Ac (M) as well as of Z11-16:Ac (m). Most other compounds showed an inheritance indicating genetic dominance of the corn strain. The within-strain phenotypic correlations among the various components were consistent with their hypothesized biosynthetic pathway, and between-strain differences in the correlation structure suggested candidate genes that may explain the pheromone differences between the 2 strains. These include Δ9- and Δ11 desaturases, and possibly also a Δ7-desaturase, although the latter has not been identified in insects so far. The 2 host strains of S. frugiperda produce systematically differing female sex pheromone blends. Previously-documented geog. variation in the sexual communication of this species did not take strain identity into account, and thus may be partly explained by different strain occurrence in different regions. The finding of pheromone differences reinforces the possibility of incipient reproductive isolation among these strains, previously shown to differ in the timing of nocturnal mating activity and host plant use. Finding the genetic basis of the pheromone differences, as well as these other biol. traits, will help to elucidate the role of premating isolation in the continuing differentiation of these two strains that may eventually lead to speciation.

Frontiers in Zoology 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

Zhu, Zhaoguo published the artcilePhotoelectron Spectroscopic and Computational Study of the Deprotonated Gallic Acid and Propyl Gallate Anions, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate, the publication is Journal of the American Society for Mass Spectrometry (2022), 33(8), 1355-1361, database is CAplus and MEDLINE.

Antioxidants play important roles in eliminating reactive oxygen species (ROS), which have been associated with various degenerative diseases, such as cancer, aging, and inflammatory diseases. Gallic acid (GA) and Pr gallate (PG) are well-known antioxidants and have been widely studied in vitro and in vivo. The biol. antioxidant abilities of GA and PG are related to the electronic structure of their dehydro-radicals. In this work, we report a combined photoelectron spectroscopic and computational study of the deprotonated gallic acid anion, [GA-H]-, and deprotonated Pr gallate anion, [PG – H]-. Adiabatic electron affinities of the dehydro-gallic acid radical, [GA-H]· and of the dehydro-Pr gallate radical, [PG – H]·, are measured to be 2.90 ± 0.05 eV and 2.85 ± 0.05 eV, resp., and compared to computational results.

Journal of the American Society for Mass Spectrometry 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 C14H21BO2, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate.

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

Martens, Frank K. published the artcileSignificance of the rubidium bromide thermionic detector equipped with a gate electrode in the analysis of halogenated dithiocarbamate derivatives, Application of Benzyl diethylcarbamodithioate, the publication is Journal of Chromatography (1977), 140(1), 86-92, database is CAplus.

A gas chromatog. detection method by using a RbBr thermionic detector equipped with a gate electrode is established to improve the identification of halogenated and nonhalogenated dithiocarbamate benzyl esters. An inversion of the thermionic system signal was observed on changing the polarities around the jet and the collector. Each compound, depending on its heteroatom, inverts at a different gate potential. Very accurate control of the voltage supply to the gate electrode around the flame tip provides the possibility of collecting fixed inversion potentials, characteristic for compounds with a certain heteroatom constitution. The peak inversion phenomenon makes a valuable contribution to a specific identification of derivatized dithiocarbamates.

Journal of Chromatography 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, Application of Benzyl diethylcarbamodithioate.

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

Herbert, Myles B. published the artcileConcise syntheses of insect pheromones using Z-selective cross metathesis, Product Details of C14H26O2, the publication is Angewandte Chemie, International Edition (2013), 52(1), 310-314, database is CAplus and MEDLINE.

The facile synthesis of lepidopteran female sex pheromones was achieved using ruthenium-based Z-selective olefin metathesis. The synthesis of these compounds provides insight into the reactivity and selectivity of the catalyst, which is markedly distinct from previous generations of metathesis catalysts. The development of new Z-selective catalysts and operating on a larger scale should make this methodol. even more selective and efficient. Compounds containing a variety of functional groups, including alcs., acetates, aldehydes, ketones, and epoxides, were easily prepared in a minimal number of steps from com. sources, including several seed-oil derivatives It was demonstrated that ruthenium-based Z-selective metathesis provides an attractive route to form complex internal olefins in good yields with high cis-selectivity, and could emerge as a viable alternative to other popular methods used to form cis olefins, such as the partial hydrogenation of alkynes and the Wittig reaction.

Angewandte Chemie, International Edition 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

Ranganathan, S. published the artcileMetamorphosis of castor oil to insect sex-pheromones and useful synthons, Synthetic Route of 16974-11-1, the publication is Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry (1984), 23B(12), 1197-207, database is CAplus.

The primary fragmentation products of castor oil, namely, Me undec-10-enoate and sebacic acid were converted into synthons I (n = 7-10). A surprisingly clean decarboxylative elimination of sebacic acid monoester gives Me non-8-enoate, a synthon related to recefeiolide and a precursor to I (n = 7), the utility of which, was illustrated with the synthesis of phermomones of Grapholita molesta. Me dec-9-enoate was prepared from Me undec-10-enoate. Me non-8-enoate was transformed via I (n = 8) to the pheromones of Spodoptera frugiperda, Heliothis virescens and Paralobesia viteana. I (n = 9), readily prepared from Me undec-10-enoate, was used to illustrate a new strategy in pheromone synthesis, namely, the use of coupling elements, leading to the preparation of bombykol in high yields and excellent stereochem. purity. I (n = 10), already reported, was transformed to vaccenic acid, the transposed π-isomer of oleic acid, in good yields, thus demonstrating the use of acetylide synthons for the preparation of rare fatty acids.

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry 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

Li, Zong-lin published the artcileResearch on the determination methods of N,N-dimethylcarbamoylmethyl-p-hydroxyphenylacetate, Application of 2-(Dimethylamino)-2-oxoethyl 2-(4-hydroxyphenyl)acetate, the publication is Yingyong Huagong (2014), 43(10), 1922-1924, database is CAplus.

N,N-dimethylcarbamoylmethyl-p-hydroxyphenylacetate was determined by HPLC. The anal. column was Thermo Syncronis C₁₈ (250 mm × 4.6mm, 5 μm). The mobile phase consisted of acetonitrile-water (30:70). The flow rate was 1.0 mL/min and the detection wavelength was 275 nm. Results showed that the linear range of N,N-dimethylcarbamoylmethyl-p-hydroxyphenylacetate was at 0.1-1.0 μg, and the average recovery was 98.8%, RSD was 1.08%. The method is accurate, convenient, good reproducibility and can be used for the content determination of N,N-dimethylcarbamoylmethyl-p-hydroxyphenylacetate, also suitable for the quality controlling during the industrial producing process.

Yingyong Huagong published new progress about 59721-16-3. 59721-16-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Phenol,Ester,Amide, name is 2-(Dimethylamino)-2-oxoethyl 2-(4-hydroxyphenyl)acetate, and the molecular formula is C12H15NO4, Application of 2-(Dimethylamino)-2-oxoethyl 2-(4-hydroxyphenyl)acetate.

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