Tag: M.W=200-250

Zurowska, Magdalena published the artcileEffect of lateral fluorine substitution far from the chiral center on mesomorphic behaviour of highly titled antiferroelectric (S) and (R) enantiomers, Category: esters-buliding-blocks, the publication is Journal of Molecular Liquids (2018), 504-510, database is CAplus.

Several new liquid crystalline chiral ester enantiomers in the (S) and (R) configuration were designed and characterised. In order to tune their mesomorphic properties, the mol. core was laterally substituted by fluorine atoms in different positions on the benzene ring placed in the mol. core far from the chiral center. All the materials possess the self-assembling behavior, specifically the paraelec. orthogonal smectic A*, the ferroelec. tilted smectic C* and antiferroelec. tilted smectic C_A* phases over a broad temperature range down to room temperature Properties of the materials were characterised by the polarising optical microscopy, differential scanning calorimetry, electro-optics and dielec. spectroscopy. Due to high chem. stability, reasonably broad temperature ranges of polar smectic mesophases (up to 110 °C) and very high values of the optical tilt angle (40-45°) at saturation, these materials can be used as chiral dopants for the multicomponent orthoconic mixture design aimed for development of advanced electro-optic and photonic devices.

Journal of Molecular Liquids 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 C8H6ClNO, Category: esters-buliding-blocks.

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

Roecker, Anthony J. published the artcileDiscovery of selective, orally bioavailable, N-linked arylsulfonamide Na_v1.7 inhibitors with pain efficacy in mice, Synthetic Route of 942603-91-0, the publication is Bioorganic & Medicinal Chemistry Letters (2017), 27(10), 2087-2093, database is CAplus and MEDLINE.

The voltage-gated sodium channel Na_v1.7 is a genetically validated target for the treatment of pain with gain-of-function mutations in man eliciting a variety of painful disorders and loss-of-function mutations affording insensitivity to pain. Unfortunately, drugs thought to garner efficacy via Na_v1 inhibition have undesirable side effect profiles due to their lack of selectivity over channel isoforms. Herein we report the discovery of a novel series of orally bioavailable arylsulfonamide Na_v1.7 inhibitors with high levels of selectivity over Na_v1.5, the Na_v isoform responsible for cardiovascular side effects, through judicious use of parallel medicinal chem. and physicochem. property optimization. This effort produced inhibitors such as compound 5 with excellent potency, selectivity, behavioral efficacy in a rodent pain model, and efficacy in a mouse itch model suggestive of target modulation.

Bioorganic & Medicinal Chemistry Letters published new progress about 942603-91-0. 942603-91-0 belongs to esters-buliding-blocks, auxiliary class Other Aliphatic Fused-Heterocycles, name is Ethyl 2-methylene-5-oxohexahydro-1H-pyrrolizine-7a-carboxylate, and the molecular formula is C11H15NO3, Synthetic Route of 942603-91-0.

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

Schirra, K. J. published the artcileIntegrated pest management in vineyards, Formula: C14H26O2, the publication is Schriftenreihe des Bundesministeriums fuer Ernaehrung, Landwirtschaft und Forsten, Reihe A: Angewandte Wissenschaft (1991), 1-114, database is CAplus.

Protection of beneficial invertebrates, achieved by replacement of Decis (I) and Me 605 Sp (parathion-methyl; II) in Eupoecilia ambiguella control by male confusion by broadcasting 50 g Z-9-dodecenyl acetate (III)/ha in 500 dispensers, each containing 0.1 g III, in May and July (for both pest generations), was examined in vineyards during 3 yr. III increased the number of individuals and species of higher spiders and Chalcidoidea for which I was more toxic than II. III increased the invasion of Sparganothis pilleriana larvae by parasitoids. The increase of Typhlodromus pyri under the III treatment led to elimination of wintering Panonychus ulmi eggs which were especially numerous under the I treatment. III was harmless for Lycosa agrestis for which I was 100% lethal in the laboratory and for Trechus quadristriatus, Forficularia auricularia, and Chrysoperla carnea for which II was 80-100% lethal.

Schriftenreihe des Bundesministeriums fuer Ernaehrung, Landwirtschaft und Forsten, Reihe A: Angewandte Wissenschaft 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

Asano, Akiko published the artcileEffects of amino acids and chirality for molecular folding of desoxazoline-ascidiacyclamide derivatives: x-ray crystal structures of four cyclic octapeptides including unusual amino acids, cyclo(-Ile-aThr-D-Val-Thz-)₂, cyclo(-Ala-aThr-D-Val-Thz-Ile-aThr-D-Val-Thz-), cyclo(-Val-aThr-D-Val-Thz-Ile-aThr-D-Val-Thz-), and cyclo(-Ile-aThr-Val-Thz-Ile-aThr-D-Val-Thz-), Formula: C10H19NO3, the publication is Biopolymers (2001), 58(3), 295-304, database is CAplus and MEDLINE.

The desoxazoline derivative of ascidiacyclamide, cyclo(-L-Ile-L-allo-threonine-D-Val-thiazole-)₂ (1), was modified to disturb the C₂-symmetry. Three addnl. derivatives of ascidiacyclamide were prepared as follows: the Ile¹ residue of 1 was replaced with Ala (2) or Val (3), and the D-Val³ residue was replaced with Val (4). The crystal structures of 1-4 were analyzed by x-ray diffraction methods. The mols. of all compounds were folded and this type of structure has not been observed so far in x-ray structures of ascidiacyclamide derivatives except for patellamide D. The folding patterns of 1-4 were similar to each other and resembled that of patellamide. The asym. modifications at position 1 caused the conformational changes at local area, and these were related to peptide-peptide and peptide-solvent interactions. Despite the diverse backbone conformation generated by the epimeric modification at position 3, the entire mol. of 4 was folded. These results indicate that (1) the desoxazoline-ascidiacyclamides favored the folded structures, and (2) modifications of the side chain size at position 1 and the chirality at position 3 introduced the local conformational changes to the derivatives, suggesting that (3) the lack of the oxazoline block leads to conformational flexibility in 1-4, which accept the conformational change with no drastic change on the entire structure.

Biopolymers 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, Formula: C10H19NO3.

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

Peng, Han-Ying published the artcileTransition-Metal-Free C(sp³)-S Coupling in Water: Synthesis of Benzyl Dithiocarbamates Using Thiuram Disulfides as an Organosulfur Source, Product Details of C12H17NS2, the publication is European Journal of Organic Chemistry (2019), 2019(5), 949-956, database is CAplus.

A simple, highly efficient and environmentally benign method for the synthesis of benzyl dithiocarbamates was reported. Without addition of metal catalyst, a series of 34 benzyl dithiocarbamates were obtained in good to excellent yields by treating benzyl halides with tetraalkylthiuram disulfides in water. The protocol allows easy access to C(sp³)-S bond formation, features the advantages of easy performance, environmental friendliness, good to excellent yields, and good functional tolerance, showing potential value for the preparation of some biol. active compounds

European Journal of Organic Chemistry 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, Product Details of C12H17NS2.

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

Wolosiak, Rafal published the artcileVerification of the Conditions for Determination of Antioxidant Activity by ABTS and DPPH Assays-A Practical Approach, Application In Synthesis of 121-79-9, the publication is Molecules (2022), 27(1), 50, database is CAplus and MEDLINE.

The ABTS and DPPH methods are among the most popular assays of antioxidant activity determination Attempts to adapt them to different analytes and the search for the highest values of antioxidant activity has resulted in a large variety of assay conditions to be presented in the literature, including the way the measurement is made. This makes it difficult to relate the results to real oxidation systems, and often makes it impossible to compare them. Such a comparison is limited in advance by the use of stable radicals that do not exist in nature and that react differently from those generated in food or in vivo. Therefore, it is important to introduce measures aimed at standardizing the conditions of the activity assay, including reaction time and several reaction environments suitable for testing different groups of compounds In this study, we used natural antioxidants of various structures: phenolic acids, flavonoids, peptides and corresponding amino acids, ascorbic acid and α-tocopherol, and also synthetic analogs of selected compounds The curves of dependence of the measured absorbance on the concentration of antioxidants were described, the ranges of linearity were determined, and the value of the error made when reading in various ranges of dependencies was estimated We also determined and compared the activity values using two popular methods (IC₅₀ and TEAC), taking into account different environments and reaction times. Based on the collected data, recommendations were formulated regarding the reaction conditions adapted to the studies of individual groups of antioxidants, and unified reaction times were proposed. Taking into account the state before reaching the equilibrium of antioxidants reacting in a complex manner, this approach may introduce a simplified reference to the competing reaction that occurs in reality.

Molecules 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 C12H9N3O4, Application In Synthesis of 121-79-9.

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

Hou, Siyu published the artcileElucidation of the Regulatory Network of Flavonoid Biosynthesis by Profiling the Metabolome and Transcriptome in Tartary Buckwheat, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate, the publication is Journal of Agricultural and Food Chemistry (2021), 69(25), 7218-7229, database is CAplus and MEDLINE.

The characteristics of flavonoid metabolism in different Tartary buckwheat (TB) tissues and the related gene regulation network are still unclear at present. One hundred forty-seven flavonoids were identified from six TB tissues using the ultra performance liquid chromatog. tandem mass spectrometry (UPLC-MS/MS) method. The roadmap of the rutin synthesis pathway was revealed. Through transcriptomic anal. it was revealed that the differentially expressed genes (DEGs) are mainly enriched in the “Phenylpropanoid biosynthesis” pathway. Fifty-two DEGs involved in the “flavonol synthesis” pathway were identified. The weighted gene correlation network anal. revealed four co-expression network modules correlated with six flavonol metabolites. Eventually, 74 genes revealed from MEblue and MElightsteelblue modules were potentially related to flavonol synthesis. Of them, 7 MYB transcript factors had been verified to regulate flavonoid synthesis. Furthermore, overexpressed FtMYB31 enhanced the rutin content in vivo. The present findings provide a dynamic flavonoid metabolism profile and co-expression network related to rutin synthesis and are thus valuable in understanding the mol. mechanisms of rutin synthesis in TB.

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

Renou, Michel published the artcileSex pheromones of zygaenid moths (Lepidoptera, Zygaenidae): electroantennographic data, Quality Control of 16974-11-1, the publication is Comptes Rendus des Seances de l’Academie des Sciences, Serie 3: Sciences de la Vie (1982), 295(10), 623-6, database is CAplus.

The electrophysiol. responses of the antennae of male Zygaena hippocrepidis and Z. filipendulae to 86 synthetic pheromonal compounds belonging to a series of C12, C14, or C16 monounsaturated acetates as well as the corresponding alcs. and aldehydes were recorded. (Z)-11-Tetradecenyl acetate (Z11 TDA) produced the highest responses of Z. hippocrepidis antennae. On the other hand, the antennae of male Z. filipendulae appeared to be more sensitive to (Z)-7-dodecenyl acetate. Moreover, Z11 TDA evokes sexual behavior in male Z. hippocrepidis and attracts males of this species in the field.

Comptes Rendus des Seances de l’Academie des Sciences, Serie 3: Sciences de la Vie 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

Nantogmah, S. published the artcileSynthesis and preliminary evaluation of affinity to retinoic acid receptors for new organosilicon-based retinoids, Application In Synthesis of 50670-76-3, the publication is Pharmaceutical Chemistry Journal (2012), 45(10), 612-621, database is CAplus.

Two facile synthetic routes to eleven new Si-containing ligands for retinoic acid receptors (RARs) are reported. The design of these RAR ligands is based on a pharmacophoric model that divides the mols. into three regions that are necessary for efficient binding to the corresponding receptors: a hydrophobic region (A), a linker or tether region (B) and a hydrophilic region (C). The ligands are unique in region A due to their acyclic nature and the presence of alkyl-substituted Si at the core. The substituted silyl groups were used to fulfill pharmacophore requirements. Various alkyl substituents available on the Si starting materials afford an opportunity to explore steric effects on binding. In region B of four ligands, a cinnamate moiety maintains some degree of conjugation and planarity in the mols. A biaryl group used in region B of another series of compounds is known to lead to RARb selectivity. Finally, region C of the ligands contains a carboxylate group, a well known pharmacophore requirement for RAR ligands. The compounds prepared in this work have micromolar to nanomolar affinity for these medically relevant target receptors. The proposed silane-containing ligands represent siloacetylenic aryl acids that are worth of further study. They may serve as leads for the development of higher-affinity, more receptor-selective agents.

Pharmaceutical Chemistry 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, Application In Synthesis of 50670-76-3.

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

Guan, Zhibin published the artcileFluorocarbon-Based Heterophase Polymeric Materials. 1. Block Copolymer Surfactants for Carbon Dioxide Applications, SDS of cas: 3052-61-7, the publication is Macromolecules (1994), 27(20), 5527-32, database is CAplus.

1,1-Dihydroperfluorooctyl acrylate (I) block copolymers were prepared for use as lipophilic surfactants for liquid CO₂ applications. Telechelic polystyrenes capped with N,N-diethyldithiocarbamate groups were prepared using the iniferter method. The functionalities of the telechelic polystyrene samples were analyzed by UV/vis, ¹H-NMR, and 3-D GPC. The 3-D GPC anal. provided detailed information on the functionality of end groups across the molar mass distribution. The block copolymers were prepared by subsequent polymerization of I using the telechelic polystyrene as macroinitiator. The chem. composition, the glass transition temperature, and solubility of the block copolymers were studied.

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