Tag: 300-400

Ma, Tao; Hua, Jiawei; Bian, Mixue; Qin, Hong; Lin, Xinxin; Yang, Xiaobing; Liu, Chengkou; Yang, Zhao; Fang, Zheng; Guo, Kai published an article in 2022. The article was titled 《Visible light-promoted aerobic oxidative cleavage and cyclization of olefins to access 3-hydroxy-isoindolinones》, and you may find the article in Organic Chemistry Frontiers.Quality Control of Ethyltriphenylphosphonium bromide The information in the text is summarized as follows:

A convenient and environmentally friendly synthetic route from 2-vinylbenzimides to 3-hydroxy-isoindolinones through visible light-promoted transformations via iron/disulfide catalysis and mol. oxygen oxidation was developed. A range of 3-hydroxy-isoindolinones were obtained in moderate to good yields, which exhibited excellent functional group compatibility and broad substrate scope. Further mechanistic investigations proved that dioxetane might be a key intermediate being involved in the reaction. After reading the article, we found that the author used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Quality Control of Ethyltriphenylphosphonium bromide)

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Quality Control of Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Han, Yanning; Zhang, Tong; Chen, Qiao; Chen, Xinyu; Xue, Pengchong published an article in 2021. The article was titled 《π-Stacking Conversion and Enhanced Force-Stimuli Response of a Divinylanthracene Derivative in a Hydrogen-Bonded Framework》, and you may find the article in Crystal Growth & Design.Related Products of 523-27-3 The information in the text is summarized as follows:

Hydrogen bond-induced π-stacking conversion was used to achieve an enhanced force-stimuli response of 9,10-bis(2-(pyridin-4-yl)vinyl)anthracene (BP4VA). In BP4VA crystals, the mols. adopted a J-aggregate pattern, and no overlap between the central anthracene planes was observed Trimesic acid (TA) as a hydrogen bond donor could promote the transformation of the π-stacking type of BP4VA as a hydrogen bond acceptor. It was found that TA and BP4VA mols. formed two-dimensional lamellar hydrogen-bonded frameworks with large windows, which were filled by BP4VA mols. belonging to other layers. Within such three-dimensional packing, J-aggregate stacking type of BP4VA converted into a mixture of J-type and H-type dimers. Moreover, BP4VA adopted a highly twisted conformation, and π-π interaction between them was very weak. So, the hydrogen-bonded complex emitted a short wavelength fluorescence. More importantly, the yellow hydrogen-bonded complex turned into red solids under force stimuli, and its fluorescence had a fairly large shift of more than 110 nm. This is in contrast with a spectral shift of 43 nm from the sheared neat BP4VA crystals. Quantum chem. calculation and spectral observations implied that the planarization, shortened π-distance, and large overlap between anthracene units should be responsible for the large spectral shift. The results imply that the appropriate acid as a hydrogen bond donor might help distyrylanthracene derivatives possess outstanding functions. Hydrogen bond-induced π-stacking conversion was used to achieve an enhanced force-stimuli response of 9,10-bis(2-(pyridin-4-yl)vinyl)anthracene. Trimesic acid (TA) and BP4VA formed three-dimensional frameworks, in which the J-aggregate stacking type converted into a mixture of J-type and H-type dimers. Moreover, the yellow complex turned into red solids under force stimuli, and its fluorescence had a shift of more than 110 nm. In the experiment, the researchers used 9,10-Dibromoanthracene(cas: 523-27-3Related Products of 523-27-3)

9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Related Products of 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Jayabharathi, Jayaraman; Thilagavathy, Shanmugam; Thanikachalam, Venugopal published their research in RSC Advances in 2021. The article was titled 《Blue organic light-emitting diodes with hybridized local and charge-transfer excited state realizing high external quantum efficiency》.Recommanded Product: 523-27-3 The article contains the following contents:

Donor-spacer-acceptor (D-π-A) materials CAPI and CCAPI, with hybridized local and charge transfer (HLCT) emissive states, have been synthesized. The twisting D-π-A architecture promotes the partial separation of HOMO and LUMO, leading to an enhanced % CT component, and the anthracene moiety in CAPI and CCAPI increases the conjugation length, leading to an enhanced % LE component. The non-doped device with CCAPIb shows the blue emission (450 nm) with maximum current efficiency (ηc), power efficiency (ηp), and external quantum efficiency (ηex) of 16.83 cd A-1, 15.32 lm W-1, and 12.0%, resp., as well as exciton utilization efficiency (EUE) of 95% with a luminance of 32 546 cd m-2 and a roll-off efficiency of 0.53%. The new design strategy has great potential for developing high-performance blue electroluminescent materials. The experimental process involved the reaction of 9,10-Dibromoanthracene(cas: 523-27-3Recommanded Product: 523-27-3)

9,10-Dibromoanthracene(cas: 523-27-3) can be sublimated and oxidized to generate anthraquinone. Soluble in hot benzene and hot toluene, slightly soluble in alcohol, ether and cold benzene, insoluble in water.Recommanded Product: 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Jiang, Xiaoli; Han, Bo; Xue, Yuhang; Duan, Mei; Gui, Zhuofan; Wang, You; Zhu, Shaolin published their research in Nature Communications in 2021. The article was titled 《Nickel-catalysed migratory hydroalkynylation and enantioselective hydroalkynylation of olefins with bromoalkynes》.Related Products of 1530-32-1 The article contains the following contents:

Here, an NiH-catalyzed reductive migratory hydroalkynation of olefins such as, 4-phenyl-1-butene, (E)-1,2-diphenylethene, 1H-indene, etc. with bromoalkynes RCCBr [R = tris(propan-2-yl)silyl, triphenylmethyl, tert-butyldiphenylsilyl] that delivers the corresponding benzylic alkynation products ArCH(CH2R1)CCR [Ar = Ph, naphthalen-2-yl, thiophen-3-yl, etc.; R1 = H, Et, 2-cyclohexylethyl, Ph, etc.] in high yields with excellent regioselectivities was reported. Catalytic enantioselective hydroalkynation of styrenes (E/Z)-Ar1CH=CHR2 [Ar1 = Ph, 2-methoxyphenyl, thiophen-3-yl, etc.; R2 = H, Me, Et, Ph, etc.] has also been realized using a simple chiral PyrOx ligand. The obtained enantioenriched benzylic alkynes (S)-Ar1CH(CH2R2)CCR [R = tris(propan-2-yl)silyl, triethylsilyl, tert-butyldimethylsilyl, etc.] are versatile synthetic intermediates and can be readily transformed into synthetically useful chiral synthons. In the experiment, the researchers used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Related Products of 1530-32-1)

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Related Products of 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Fluorescent Lewis Adducts: A Practical Guide to Relative Lewis Acidity》 was written by Bentley, Jordan N.; Elgadi, Seja A.; Gaffen, Joshua R.; Demay-Drouhard, Paul; Baumgartner, Thomas; Caputo, Christopher B.. Application of 13465-09-3 And the article was included in Organometallics in 2020. The article conveys some information:

Exptl. determining the strength of a Lewis acid is a highly desirable and important task that has implications across the chem. sciences. Recently, we developed a new fluorescence-based method for evaluating the relative acidity of a small series of Lewis acids across the p- and d-blocks of the periodic table with great precision against a series of Lewis basic fluorescent dithienophosphole oxide probes. In this report, we considerably expand the scope of the fluorescent Lewis adduct method by systematically investigating the apparent acidities of more than 50 Lewis acids in toluene. Notably, a number of the investigated Lewis acids have never been exptl. measured before. Our refined guide, which now also alleviates the uncertainties that we identified with our original method, is simple and reliable. It shows extreme sensitivity to small structural or electronic perturbations and can account for coordinative flexibility or aggregation events that occur in solution, providing an alternative method for Lewis acidity determination that is complementary to the established NMR-based methods. In the experimental materials used by the author, we found Indium(III) bromide(cas: 13465-09-3Application of 13465-09-3)

Indium(III) bromide(cas: 13465-09-3) is used as a catalyst to produce dithioacetals when unactivated alkynes react with thiols and fields such as optics and microelectronics that utilize semiconductor technology have wide uses for indium in high-performing solar cells.Application of 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Growth of InZnP/ZnS core/shell quantum dots with wide-range and refined tunable photoluminescence wavelengths》 was written by Zhang, Jinyuan; Gu, Huaimin. Related Products of 13465-09-3 And the article was included in Dalton Transactions in 2020. The article conveys some information:

Owing to their environmentally friendly characteristic, InP-based quantum dots (QDs) show great potential in various fields as an alternative to Cd-based QDs. However, the current mainstream synthesis process, the (TMS)3P-based injection method, still faces many challenges, such as the high cost of (TMS)3P and complex temperature control. In contrast, the solvothermal method is considered to be more feasible and reproducible. Despite its potential advantages, little has been done to understand how the precursors influence the synthesis of InP QDs using the solvothermal method. In this research, InZnP/ZnS QDs were synthesized using practical phosphorus precursors (DEA)3P or (DMA)3P. Through the feasible regulation of zinc, indium, phosphorus and sulfur precursors, the band gap of the QDs could be widely and accurately tuned, and a much wider photoluminescence wavelength ranging from 484 nm to 651 nm could be achieved. Furthermore, InI3 and InBr3 contributed to the blueshift in the PL wavelengths, and the combination of (DEA)3P, (DMA)3P, n-DDT and t-DDT refined the PL wavelength with a small tuning gap of 5 nm. In the experiment, the researchers used many compounds, for example, Indium(III) bromide(cas: 13465-09-3Related Products of 13465-09-3)

Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.Related Products of 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Biobased Cycloolefin Polymers: Carvone-Derived Cyclic Conjugated Diene with Reactive exo-Methylene Group for Regioselective and Stereospecific Living Cationic Polymerization》 was published in ACS Macro Letters in 2020. These research results belong to Nishida, Takenori; Satoh, Kotaro; Nagano, Shusaku; Seki, Takahiro; Tamura, Masazumi; Li, Yingai; Tomishige, Keiichi; Kamigaito, Masami. Recommanded Product: 1779-49-3 The article mentions the following:

Carvone, a naturally abundant chiral cyclic α,β-unsaturated carbonyl compound, was chem. transformed into cyclic exo-methylene conjugated dienes. The exo-methylene group had high reactivity in cationic polymerization and was efficiently polymerized in a controlled manner via regioselective 1,4-conjugated additions using initiating systems effective for living cationic polymerization of vinyl ethers. The obtained polymers with 1,3-cyclohexenyl units and tetra-substituted olefins in the main chain showed high glass transition temperatures over 110°C. The chiral monomer underwent stereospecific polymerization to result in polymers with low solubility and weak packing of the rigid main chain in the lamellar layers. The racemic mixture resulted in soluble amorphous polymers, which were subsequently hydrogenated into cycloolefin polymers with enhanced thermal properties. The experimental part of the paper was very detailed, including the reaction process of Methyltriphenylphosphonium bromide(cas: 1779-49-3Recommanded Product: 1779-49-3)

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is used for methylenation through the Wittig reaction. It is utilized in the synthesis of an enyne and 9-isopropenyl -phenanthrene by using sodium amide as reagent. Recommanded Product: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Fully renewable limonene-derived polycarbonate as a high-performance alkyd resin》 was published in Polymer International in 2020. These research results belong to Li, Chunliang; Veldhuis, Theo; Reuvers, Bart; Sablong, Rafael J.; Koning, Cor E.. Product Details of 1530-32-1 The article mentions the following:

Limonene-derived polycarbonate-based alkyd resins (ARs) have been prepared by copolymerization of limonene dioxide with CO2, catalyzed by a β-diiminate zinc-bis(trimethylsilyl)amido complex, and subsequent chem. modification with soybean oil fatty acids using triphenylethylphosphonium bromide as the catalyst. This quant. partial modification was realized via epoxy-carboxylic acid chem., affording ARs with higher oil lengths, lower polydispersities and higher glass transition temperatures (Tg) in comparison to a conventional polyester AR based on phthalic acid, multifunctional polyol pentaerythritol and soybean fatty acid. The novel limonene polycarbonate AR and the conventional polyester AR were evaluated as coatings and both the phys. drying (without the presence of the oxidative drying accelerator Borchi Oxy Coat) and chem. curing (with Borchi Oxy Coat) processes of these coatings were monitored by measuring the Koenig hardness and complex modulus development with time. A better performance was obtained for the alkyd paint containing polycarbonates modified with fatty acids (FA-PCs), which showed a faster chem. drying, a higher Koenig hardness and a higher Tg in coating evaluation, demonstrating that the fully renewable FA-PCs are promising resins for alkyd paint applications. The experimental process involved the reaction of Ethyltriphenylphosphonium bromide(cas: 1530-32-1Product Details of 1530-32-1)

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Product Details of 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Tajimi, Yuka; Nachi, Yasuhiro; Inada, Ryoko; Hashimoto, Ryoga; Yamawaki, Mugen; Ohkubo, Kei; Morita, Toshio; Yoshimi, Yasuharu published an article in Journal of Organic Chemistry. The title of the article was 《9-Cyano-10-methoxycarbonylanthracene as a Visible Organic Photoredox Catalyst in the Two-Molecule Photoredox System》.Name: 9,10-Dibromoanthracene The author mentioned the following in the article:

Visible-light-induced decarboxylative and deboronative reactions using two-mol. organic photoredox catalysts, namely, phenanthrene (Phen) and biphenyl (BP), as electron donors and 9-cyano-10-methoxycarbonylanthracene 1a as an electron acceptor were achieved. The high solubility of 1a significantly improved the reaction efficiency and product yield. In addition, the facile tuning of the oxidation potential of the electron-donor mol. via the replacement of Phen with BP enabled the application of the two-mol. photoredox system to a wide range of substrates. The experimental process involved the reaction of 9,10-Dibromoanthracene(cas: 523-27-3Name: 9,10-Dibromoanthracene)

9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Name: 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Wu, Yimin; Zhang, Ling; Ma, Fudong; Ding, Tao; Obolda, Ablikim published an article in Designed Monomers and Polymers. The title of the article was 《Synthesis of carbazole-based dendritic conjugated polymer: dual channel optical probe for detection of iodine (-) and mercury (2+)》.Recommanded Product: 6825-20-3 The author mentioned the following in the article:

A new type of carbazole-based blue-emitting dendritic conjugated polymer, poly[(9,9-dioctyl)-2,7-fluorene-co-4,4′,4”-triphenylamine-co-9-(4-(9H-carbazol-9-yl)butyl)-3,6-carbazole](P), was successfully synthesized by Suzuki coupling reaction. Chem. structures of monomers and polymer were verified by FI-IR and 1HNMR characterizations. We found that polymer showed a special selectivity and high sensitivity for I-. With the addition of I-, the fluorescent polymer solution was obviously quenched. The polymer showed a special detection effect on I-. However, the fluorescent polymer was obviously restored when Hg2+ was added to the P/I- system due to the large complexation between I- and Hg2+. The anti-interference experiments of probe P/I- showed that other background cations have a slight influence on detecting Hg2+, and the calculated detection limit of Hg2+ reached 9.7 x 10-8 M, which could be a potential application for a two-channel cyclic detection of I- and Hg2+. Addnl., it was found that the theor. values were in agreement with the exptl. data. In the experiment, the researchers used many compounds, for example, 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Recommanded Product: 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent. And it has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Recommanded Product: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary