Tag: M.W=200-250

Fitilis, I. published the artcileTwo-photon polymerization of a diacrylate using fluorene photoinitiators-sensitizers, Synthetic Route of 2909-77-5, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2010), 215(1), 25-30, database is CAplus.

Two-photon polymerization (TPP) of a diacrylate (monomer) using 2 different fluorene mols. as photoinitiators-sensitizers is reported. The fluorene mols. contain e^– donating (triphenylamine) or e^– withdrawing (phthalimide) edge substituents. An amine co-initiator is also used lowering the polymerization threshold. The dependence of the polymerization properties (threshold, polymerization rate, lateral and axial resolution) on the type of resin, the writing power and speed as well as on the NA of the focusing lens is studied. The fluorene with triphenylamine substituent exhibits favorable properties as TPP photoinitiator-sensitizer compared to the fluorene with phthalimide, although its 2-photon absorption cross-section is smaller. Polymerization of the pure monomer or monomer-amine composite (i.e. without fluorene) is also reported.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C14H23N, Synthetic Route of 2909-77-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Esguerra, Kenneth Virgel N. published the artcileCatalytic aerobic oxidation of halogenated phenols, Recommanded Product: N1,N2-Dibenzylethane-1,2-diamine, the publication is Inorganica Chimica Acta (2018), 197-200, database is CAplus.

Phenol pollutants such as halophenols and guaiacol derivatives are produced as byproducts of many industrial processes. Aerobic oxidations for their degradation in the context of effluent treatment or environmental remediation often lack selectivity. This work describes a copper (Cu)-catalyzed approach that converts three equivalent of halogenated phenols into a single ortho-quinone, at the expense of reducing dioxygen (O₂) to water (H₂O).

Inorganica Chimica Acta published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, Recommanded Product: N1,N2-Dibenzylethane-1,2-diamine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Yang, Wenqian published the artcileThe First Fluorescent Diboronic Acid Sensor Specific for Hepatocellular Carcinoma Cells Expressing Sialyl Lewis X, Synthetic Route of 5411-14-3, the publication is Chemistry & Biology (2004), 11(4), 439-448, database is CAplus and MEDLINE.

Carbohydrate antigens with subterminal fucosylation have been implicated in the development and progression of several cancers, including hepatocellular carcinoma (HCC). Fluorescent sensors targeting fucosylated carbohydrate antigens could potentially be used for diagnostic and other applications. The authors have designed and synthesized a series of 26 diboronic acid compounds as potential fluorescent sensors for such carbohydrates. Among these compounds, 7q was able to fluorescently label cells expressing high levels of sLex (HEPG2) within a concentration range of 0.5 to 10 ¦ÌM. This compound (7q) did not label cells expressing Lewis Y (HEP3B), nor cells without fucosylated antigens (COS7). This represents the first example of a fluorescent compound labeling cells based on cell surface carbohydrate structures.

Chemistry & Biology published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C17H14F3N3O2S, Synthetic Route of 5411-14-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Weng, Jian-Quan published the artcileEnantioselective Friedel-Crafts Alkylation Reactions of 3-Substituted Indoles with Electron-Deficient Alkenes, Synthetic Route of 4230-93-7, the publication is Journal of Organic Chemistry (2016), 81(7), 3023-3030, database is CAplus and MEDLINE.

Highly enantioselective Friedel-Crafts C2-alkylation reactions of 3-substituted indoles with ¦Á,¦Â-unsaturated esters and nitroalkenes were developed using chiral Lewis acids as catalysts, which afforded chiral indole derivatives bearing C2-benzylic stereogenic centers in good to excellent yields (up to 99%) and enantioselectivities (up to 96% ee).

Journal of Organic Chemistry published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C10H10CoF6P, Synthetic Route of 4230-93-7.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wakamatsu, T. published the artcileSelective flotation of quartz and feldspar using non-ionic surfactant, Computed Properties of 2016-56-0, the publication is Publications of the Australasian Institute of Mining and Metallurgy (2005), 803-805, database is CAplus.

In order to develop the HF-free flotation reagent system, the main objective of this investigation was to study the possibility of separation of quartz from feldspar using non-ionic surfactants as the collector. The non-ionic surfactants used were polyoxyethyl cetyl ether (PECE) and polyethylene glycol monocetyl ether (PGME). The flotation behavior of quartz and microcline with PECE and PGME was investigated. Each surfactant was a good selective collector for quartz with its recovery being influenced by pH and surfactant concentration Quartz is floated favorably by both types of polyoxyethylene non-ionic surfactant whereas microcline was not so much. The floatability of quartz increases as the oxyethylene length of surfactants increases. Zeta potential measurements in the system of PGME/mineral were also carried out. It was determined that in the absence of PGME the points of zero charge for quartz and microcline should be approx. at pH 2.5 and 1.8, resp. The addition of PGME to the system causes both minerals to become less neg. charged. Differences in the zeta potential value between quartz and microcline, in the presence of PGME, were detected. It can be suggested that the interaction of the oxyethylene group to the microcline surface should not be as strong as that to the quartz surface. In the mixed surfactant system of PGME and dodecylamine acetate (DAA), a small addition of DAA causes drastic enhancement of quartz flotation in the wide pH range of 1 ? 10. In the mixed surfactant system selective flotation of quartz from microcline would be anticipated at pH <3.0. The quartz floatability is thought to be as a result of the hydrophobic interaction between the adsorbed surfactant chains at the mineral-water interface.

Publications of the Australasian Institute of Mining and Metallurgy published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C8H10O2, Computed Properties of 2016-56-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Muhammad, Amr Fatehy published the artcilePotential for upgrading El-Nakheil oil shale by froth flotation, Formula: C14H31NO2, the publication is Oil Shale (2013), 30(1), 48-59, database is CAplus.

The necessity to satisfy the increasing demand for energy and the progressive depletion of crude oil resources have renewed interest in oil shale as an alternative fuel resource. This paper aims at determining the potential for upgrading El-Nakheil oil shale, Egypt, using froth flotation. Samples were prepared by comminution followed by sieving into different size fractions. The flotation behavior of the material and extent of cleaning were studied with respect to non-ionic and ionic collectors of anionic and cationic types. The organic rich portions of samples could not be rendered sufficiently hydrophobic by the collectors used and the selectivity towards surfactant was very low.

Oil Shale published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Formula: C14H31NO2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Karunakaran, K. published the artcileKinetics of oxidation of phenoxyacetic acids by pyridinium hydrobromide perbromide, Computed Properties of 1798-04-5, the publication is Journal of Physical Organic Chemistry (1996), 9(2), 105-10, database is CAplus.

The oxidation of several monosubstituted phenoxyacetic acids by pyridinium hydrobromide perbromide (PHPB) was studied in aqueous acetic acid. The reaction is first order with respect to PHPB. Michaelis-Menten-type kinetics are observed with respect to phenoxyacetic acids. The oxidation of [2,2-²H₂]phenoxyacetic acid exhibits a substantial kinetic isotopic effect. The effect of solvent composition indicates that the transition state is more polar than the reactants. The formation constants of the intermediate phenoxyacetic acid-PHPB complexes and the rates of their decomposition were determined at different temperatures The rates of oxidation of para- and meta-substituted phenoxyacetic acids were correlated with Hammett’s substituent constants The ¦Ñ value is -2¡¤59 at 35¡ã. The rates of oxidation of ortho-substituted compounds are correlated with Charton’s triparametric equation. A mechanism involving transfer of a hydride ion from the substrate to the oxidant is proposed.

Journal of Physical Organic Chemistry published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, Computed Properties of 1798-04-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Karunakaran, K. published the artcileKinetics and mechanism of ruthenium(III) catalyzed oxidation of phenoxyacetic acids by lead tetraacetate, Safety of 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Oxidation Communications (1994), 17(3-4), 274-81, database is CAplus.

The kinetics of oxidation of a number of ortho-, meta- and para-substituted phenoxyacetic acids by lead tetraacetate to yield ortho and para isomers of acetoxyphenols, has been studied. The reaction is first order each with respect to phenoxyacetic acid, lead tetraacetate, and Ru(III) and is catalyzed by hydrogen ions. The observed solvent effect suggests that the transition state is more polarized than the reactants in a S_N2 type reaction. A fairly large Hammett value (-2.29 at 35¡ãC) indicates an electron deficient transition state. The oxidation rates of ortho-substituted compounds have been analyzed in the light of the application of Taft’s steric energy parameters. A mechanism involving the existence of Ru(V) as an intermediate complex with phenoxyacetic acid, in the rate-determining step, has been proposed.

Oxidation Communications published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, Safety of 2-(4-(tert-Butyl)phenoxy)acetic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hamdy, Rania published the artcileDesign, synthesis and evaluation of new bioactive oxadiazole derivatives as anticancer agents targeting Bcl-2, Product Details of C12H16O3, the publication is International Journal of Molecular Sciences (2020), 21(23), 8980, database is CAplus and MEDLINE.

A series of 2-(1H-indol-3-yl)-5-substituted-1,3,4-oxadiazoles I [R = benzyl, 4-methylphenoxymethyl, 4-nitrophenyl, etc.] were designed, synthesized and tested in-vitro as potential pro-apoptotic Bcl-2 inhibitory anticancer agents based on previously reported compounds Synthesis of the target 1,3,4-oxadiazoles I were readily accomplished through a cyclization reaction of indole carboxylic acid hydrazide with substituted carboxylic acid derivatives RC(O)OH in the presence of phosphorus oxychloride. New compounds I showed a range of IC₅₀ values concentrated in the low micromolar range selectively in Bcl-2 pos. human cancer cell lines. The most potent candidate I [R = 4-trifluorophenyl] showed selective IC₅₀ values of 0.52-0.88¦ÌM against Bcl-2 expressing cell lines with no inhibitory effects in the Bcl-2 neg. cell line. Moreover, I [R = 4-trifluorophenyl] showed binding that was two-fold more potent than the pos. control gossypol in the Bcl-2 ELISA binding affinity assay. Mol. modeling studies helped to further rationalize anti-apoptotic Bcl-2 binding and identified compound I [R = 4-trifluorophenyl] as a candidate with drug-like properties for further investigation as a selective Bcl-2 inhibitory anticancer agent.

International Journal of Molecular Sciences published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, Product Details of C12H16O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Thiemann, Thies published the artcileFacile, direct reaction of benzaldehydes to 3-arylprop-2-enoic acids and 3-arylprop-2-ynoic acids in aqueous medium, Recommanded Product: (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, the publication is International Journal of Organic Chemistry (2016), 6(2), 126-141, database is CAplus.

Wittig reactions of benzaldehydes, alkanals, and cycloalkanals as well as of acetophenones are carried out with alkoxycarbonyl methylidenetriphenylphosphoranes in 10 w% aqueous NaOH, where the cinnamates and alkenoates produced are hydrolyzed in situ and the corresponding acids are obtained after mostly simple extractive work-up, often without employing organic solvents. Under the same conditions, benzaldehydes are reacted with alkoxycarbonyl bromomethylidenephosphorane to produce 3-arylprop-2-ynoic acids (arylpropiolic acids).

International Journal of Organic Chemistry published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C25H34N4O2S, Recommanded Product: (E)-3-(2,4-Dimethoxyphenyl)acrylic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia