Month: December 2022

Xie, Huaijun published the artcileScreening of 484 trace organic contaminants in coastal waters around the Liaodong Peninsula, China: Occurrence, distribution, and ecological risk, Name: Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, the publication is Environmental Pollution (Oxford, United Kingdom) (2020), 115436, database is CAplus and MEDLINE.

Human activities such as agriculture, aquaculture, and industry can lead to the pollution of coastal waters by trace organic contaminants (TrOCs), and the TrOCs can pose a threat to marine ecosystems. Therefore, it is essential to investigate the occurrence, distribution, and ecol. risk of the TrOCs in coastal waters. Previous studies adopting conventional anal. methods have focused on a limited number of targets. Herein, a comprehensive and systematic determination was undertaken to target 484 TrOCs in the waters around the Liaodong Peninsula, China. Eighty-six TrOCs were detected at concentrations of up to 350 ng L-1, and 25 TrOCs were detected at a frequency of >50%. Pesticides were the predominant pollutants, occurring at high concentrations with large detection frequencies. Ecol. risks were assessed for single pollutants and mixtures based on the risk quotient and concentration addition modeling, resp. The detected pesticides posed relatively high risk to aquatic organisms, while pharmaceuticals, consumer products, and other pollutants posed little or no risk. TrOC mixtures posed extremely high risk to aquatic organisms, which represented a significant threat to the marine environment and local communities. The results described here provide useful information that can inform China’s “Action Plan for Prevention and Control of Water Pollution”.

Environmental Pollution (Oxford, United Kingdom) published new progress about 637-07-0. 637-07-0 belongs to chlorides-buliding-blocks, auxiliary class Inhibitor,Cell Cycle,PPAR, name is Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, and the molecular formula is C6H10O7, Name: Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate.

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

Zhao, Liang published the artcileSynthesis of polymethylene-based macromonomer by living polymerization of ylides, Recommanded Product: trimethyloxosulphonium chloride, the publication is Huaxue Xuebao (2011), 69(5), 591-595, database is CAplus.

Two kinds of polymethylene-based macromonomers were prepared by living polymerization of ylides. One macromonomer PM-methacrylate was obtained by the transformations of hydroxyl group at the chain end of polymethylene obtained by living polymerization of ylides. The other macromonomer PM-styryl was synthesized via living polymerization of ylides which initiated by organoborane which was prepared by hydroboration of divinylbenzene, and after the oxidation by trimethylamine-N-oxide dehydrate (TAO), α-p-vinylphenyl-ω-hydroxypolymethylene were obtained. The chain structure, mol. weight and its distribution of the two macromonomers were investigated by high temperature ¹H NMR spectra, FT-IR and high temperature GPC.

Huaxue Xuebao published new progress about 5034-06-0. 5034-06-0 belongs to chlorides-buliding-blocks, auxiliary class Salt,Aliphatic hydrocarbon chain, name is trimethyloxosulphonium chloride, and the molecular formula is C26H26N4O7, Recommanded Product: trimethyloxosulphonium chloride.

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

Santiago, Carlos published the artcileDual Ligand-Enabled Late-Stage Fujiwara-Moritani Reactions, Quality Control of 637-07-0, the publication is Synlett (2022), 33(4), 357-360, database is CAplus.

In this study, the authors studied the use of dual ligand-based palladium catalysts for the late-stage olefination of arenes. Building upon a method previously developed for simple arenes, a variety of complex arene substrates were functionalized. Importantly, the method uses the arene as a limiting reactant and is therefore suitable for valuable starting materials that cannot be used in excess. The regioselectivity of the transformation is controlled by the steric and electronic properties of the substrate, providing access to regioisomers that would be challenging to prepare through other synthetic approaches.

Synlett published new progress about 637-07-0. 637-07-0 belongs to chlorides-buliding-blocks, auxiliary class Inhibitor,Cell Cycle,PPAR, name is Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, and the molecular formula is C12H15ClO3, Quality Control of 637-07-0.

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

Mondal, Arup published the artcileSterically Controlled Late-Stage C-H Alkynylation of Arenes, COA of Formula: C12H15ClO3, the publication is Journal of the American Chemical Society (2019), 141(47), 18662-18667, database is CAplus and MEDLINE.

Herein, a complementary approach based on an arene-limited nondirected C-H activation is presented. The reaction is predominantly controlled by steric rather than electronic factors and thereby gives access to a complementary product spectrum with respect to traditional methods. A broad scope as well as the suitability of this protocol for late-stage functionalization are demonstrated.

Journal of the American Chemical Society published new progress about 637-07-0. 637-07-0 belongs to chlorides-buliding-blocks, auxiliary class Inhibitor,Cell Cycle,PPAR, name is Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, and the molecular formula is C12H15ClO3, COA of Formula: C12H15ClO3.

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

Wang, Rongkang published the artcileElectrochemical Thiolation and Borylation of Arylazo Sulfones with Thiols and B₂pin₂, Recommanded Product: 2-(4-Chloro-2-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, the publication is Advanced Synthesis & Catalysis (2021), 363(7), 1904-1911, database is CAplus.

An efficient electrochem. synthesis approach of various unsym. thioethers and arylboronates has been developed. Bench stable arylazo sulfones were used as radical precursors for carbon-heteroatom bond formation under electrochem. conditions. Moreover, the scalability of this approach was evaluated by performing the electrochem. thiolation and borylation of arylazo sulfones with thiols and B₂pin₂ on a gram scale. This protocol not only avoided the use of stoichiometric oxidants, metal catalysts, activating agents and even added bases, but also exhibited favorable functional group tolerance.

Advanced Synthesis & Catalysis published new progress about 1030832-75-7. 1030832-75-7 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Boronate Esters,Boronic acid and ester, name is 2-(4-Chloro-2-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C5H8N2O2, Recommanded Product: 2-(4-Chloro-2-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane.

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

Zhang, Lei published the artcileDesign, synthesis and evaluation of the multidrug resistance-reversing activity of pyridine acid esters of podophyllotoxin in human leukemia cells, Computed Properties of 6313-54-8, the publication is Bioorganic & Medicinal Chemistry Letters (2016), 26(18), 4466-4471, database is CAplus and MEDLINE.

Multidrug resistance (MDR) is the main cause for chemotherapeutic failure in cancer treatment. To overcome MDR, a series of pyridine acid esters of podophyllotoxin, I (R = 3-pyridyl, 4-chloro-2-pyridyl, 5-methoxy-2-pyridyl, etc.), was synthesized and their antiproliferation activities were evaluated against two human chronic myeloid leukemia cell lines in vitro. Most of them exhibited potent growth inhibition with IC₅₀ values in the nanomolar range as well as markedly reduced resistance factors. The most potent compound, I (R = 6-bromo-2-pyridyl) (II) exhibited an IC₅₀ of 0.046 ± 0.003 μM against resistant K562/ADR cells, showing more significant activity than that of adriamycin and etoposide, resp. Furthermore, II efficiently triggered cell cycle arrest at S phase and simultaneously induced apoptosis in K562/ADR cells. Meanwhile, II also regulated the expression levels of cell cycle- and apoptosis-related proteins. Addnl., II stimulated the ERK1/2 signaling and reduced the expression of Pgp protein. Finally, on the basis of results obtained using U0126, an ERK1/2 inhibitor, the ERK1/2 signalling pathway was proposed for the multidrug resistance-reversing effect of II in K562/ADR cells. Together, II could be a novel potential MDR reversal agent for the treatment of drug-resistant leukemia.

Bioorganic & Medicinal Chemistry Letters published new progress about 6313-54-8. 6313-54-8 belongs to chlorides-buliding-blocks, auxiliary class Pyridine,Chloride,Carboxylic acid, name is 2-Chloroisonicotinic acid, and the molecular formula is C14H10N2O, Computed Properties of 6313-54-8.

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

Wen, Gesi published the artcileStabilizing amyloid-β peptide by the N-terminus capture is capable of preventing and eliminating amyloid-β oligomers, Product Details of C19H14Cl2, the publication is Chemical Communications (Cambridge, United Kingdom) (2017), 53(54), 7673-7676, database is CAplus and MEDLINE.

Elimination of amyloid-β (Aβ) oligomers remains challenging. We describe here a novel strategy to prevent and eliminate the Aβ oligomers from either the early aggregation or the fibril dissolution pathway by targeting the flexible N-terminus, but not the widely investigated hydrophobic segment, with a rationally designed cyclopeptide.

Chemical Communications (Cambridge, United Kingdom) published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C24H29N5O3, Product Details of C19H14Cl2.

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

Chen, Liu published the artcileDesign and optimization of purine derivatives as in vivo active PDE10A inhibitors, Application In Synthesis of 51656-68-9, the publication is Bioorganic & Medicinal Chemistry (2017), 25(13), 3315-3329, database is CAplus and MEDLINE.

Phosphodiesterases are important enzymes regulating signal transduction mediated by second messenger mols. cAMP or cGMP. PDE10A is a unique member in the PDE family because of its selective expression in medium spiny neurons. It is recognized as anti-psychotic drug target. Based on the structural similarity between our previous chem. work on 8-aminoimidazo[1,2-a]pyrazines and the PDE10A inhibitors reported by Bartolome-Nebreda et al., we initialized a project for developing PDE10A inhibitors. After several rounds of optimization, we were able to obtain a few compounds with good PDE10A enzymic activity. And after further PDE enzymic selectivity study, metabolic stability assay and in vivo pharmacol. tests we identified two inhibitors as interesting lead compounds with the potential for further PDE10A lead optimization.

Bioorganic & Medicinal Chemistry published new progress about 51656-68-9. 51656-68-9 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Carboxylic acid,Benzene, name is 3-(2,6-Dichlorophenyl)propanoic acid, and the molecular formula is C9H8Cl2O2, Application In Synthesis of 51656-68-9.

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

Qin, Xubo published the artcilePalladium-catalyzed highly regioselective and stereoselective decarboxylative arylation of unactivated olefins with aryl carboxylic acids, Product Details of C9H9ClO4, the publication is Tetrahedron (2017), 73(16), 2242-2249, database is CAplus.

Palladium(II)-catalyzed highly regioselective and stereoselective decarboxylative arylation of unactivated olefins with aryl carboxylic acids was developed. This method was applicable to a variety of unactivated olefins, including allylamides, long chain functionalized olefins and purely aliphatic olefins, led to the formation of linear E-configured products in high yields. Both electron-rich and electron-deficient aryl carboxylic acids were suitable arylation reagents. It was found that the choice of solvent, catalyst precursor and oxidant had an important influence on reaction efficiency. As a co-solvent and ligand, DMSO was critical to catalysis. This chem. expanded the scope of decarboxylative arylation of olefins with aryl carboxylic acids, and provides a rapid access to useful linear arylation products of unactivated olefins.

Tetrahedron published new progress about 36335-47-4. 36335-47-4 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Carboxylic acid,Benzene,Ether, name is 3-Chloro-2,6-dimethoxybenzoic acid, and the molecular formula is C9H9ClO4, Product Details of C9H9ClO4.

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

Hodgson, Ernest published the artcileNutrition and metabolism of methyl donors and related compounds in the blowfly Phormia regina, Application In Synthesis of 6249-56-5, the publication is Archives of Biochemistry and Biophysics (1960), 48-54, database is CAplus and MEDLINE.

In the nutrition of P. regina (CA 51, 6894i), γ-butyrobetaine (I) or O-acetylcarnitine served as replacements for choline (II) (quant. data given), while 2-monomethylaminoethanol was a partial replacement. The relative effectiveness of the various compounds is discussed. Ethanolamine, β-hydroxybutyrate, γ-aminobutyrate, β-hydroxy-γ-aminobutyrate, trimethylamine, and sarcosine did not serve as replacements in promoting growth, even when supplemented by other metabolites (named). The II-inhibitor 2-amino-2-methylpropanol inhibited growth, but its effects could be reversed by II and compounds which could replace II. Phospholipides containing serine, ethanolamine, and II were found to be normal constituents of 3rd instar larvae. Formate was not utilized in the biosynthesis of Me groups in II synthesis, but was metabolized with liberation of CO₂, both by the living larvae and their homogenates. Biosynthesis of II from ethanolamine either did not occur or was of little importance. The effectiveness of I as a replacement for II was of interest, since I has been described as a carnitine inhibitor in other organisms. Possible mechanisms of utilization are discussed. Metabolic differences in different spp. of insects are interpreted in relation to dietary requirements. 33 references.

Archives of Biochemistry and Biophysics published new progress about 6249-56-5. 6249-56-5 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst,Inhibitor,Natural product, name is 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride, and the molecular formula is C7H16ClNO2, Application In Synthesis of 6249-56-5.

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