Tag: 300-400

In 2022,Yang, Biao; Dong, Kui; Li, Xiang-Sheng; Wu, Li-Zhu; Liu, Qiang published an article in Organic Letters. The title of the article was 《Photoacid-Enabled Synthesis of Indanes via Formal [3 + 2] Cycloaddition of Benzyl Alcohols with Olefins》.Safety of Ethyltriphenylphosphonium bromide The author mentioned the following in the article:

An environmentally friendly and high diastereoselective method for synthesizing indanes was developed via a metastable-state photoacid system containing catalytic protonated merocyanine (MEH). Under visible-light irradiation, MEH yields a metastable spiro structure and liberated protons, which facilitated the formation of carbocations from benzyl alcs., thus delivering diverse mols. in the presence of various nucleophiles. Mainly, a variety of indanes was easily obtained from benzyl alcs. and olefins and water was the only byproduct. In addition to this study using Ethyltriphenylphosphonium bromide, there are many other studies that have used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Safety of Ethyltriphenylphosphonium bromide) was used in this study.

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.Safety of Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Stone, David; Koley, Somnath; Remennik, Sergei; Asor, Lior; Panfil, Yossef E.; Naor, Tom; Banin, Uri published an article in 2021. The article was titled 《Luminescent Anisotropic Wurtzite InP Nanocrystals》, and you may find the article in Nano Letters.Category: bromides-buliding-blocks The information in the text is summarized as follows:

Luminescent wurtzite InP nanocrystals with narrow size distribution were synthesized via a cation exchange reaction from hexagonal Cu3P nanocrystals. A comprehensive surface treatment by NOBF4 was performed, which removes excess Cu, while generating stoichiometric InP nanocrystals with fluoride surface passivation. The attained InP nanocrystals manifest a highly resolved absorption spectrum with a narrow emission line of 80 meV, and luminescence quantum yield of ≤40%. Optical anisotropy measurements on ensemble and single particle basis show the occurrence of polarized transitions directly mirroring the anisotropic wurtzite lattice, as manifested from modeling of the quantum confined electronic levels. This shows a green synthesis path for achieving wurtzite InP nanocrystals with desired optoelectronic properties including color purity and light polarization with potential for diverse optoelectronic applications. In addition to this study using Indium(III) bromide, there are many other studies that have used Indium(III) bromide(cas: 13465-09-3Category: bromides-buliding-blocks) was used in this study.

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.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Xu, Hongyan; Zheng, Minggang; Wang, Ling; Zhao, Wucai; Hua, Yi; Fang, Lidan; Liu, Aifeng; Zhao, Zongshan published an article in 2021. The article was titled 《High throughput extraction strategy for simultaneous analysis of 19 tetrabromobisphenol A and halogenated carbazole analogs in seafood》, and you may find the article in Food Chemistry.SDS of cas: 6825-20-3 The information in the text is summarized as follows:

Tetrabromobisphenol A (TBBPA), halogenated carbazole (HCZ), and their analogs are the emerging pollutants invading the marine environment. So far, a few methods have been reported for the simultaneous anal. of these pollutants due to their large polarity difference. In this study, an effective extraction and cleanup strategy was developed for the simultaneous determination of 19 TBBPA and HCZ congeners in seafood. The 19 analytes could be directly analyzed through high performance liquid chromatog. after ultrasonic extraction (methanol, duplicate Et acetate-acetone (1:1, volume/volume)) and gel permeation chromatog. cleanup. The acceptable spike-recoveries were within 65.7-118.3%; the precision was intra-/inter-day RSDs: 0.0-6.7%/0.0-8.5%; and the matrix effects were between -14.1% and 12.4%. The detection limits and quantification limits were 0.002-0.014 and 0.020-0.200 μg g-1 dw, resp. Addnl., this method successfully analyzed the seafood samples and the concentrations of these analytes were in range of nd-5.4 μg g-1 dw. In addition to this study using 3,6-Dibromo-9H-carbazole, there are many other studies that have used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3SDS of cas: 6825-20-3) was used in this study.

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.SDS of cas: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Forster, Dan; Guo, Weisi; Wang, Qian; Zhu, Jieping published their research in ACS Catalysis in 2021. The article was titled 《Photoredox Catalytic Three-Component Amidoazidation of 1,3-Dienes》.HPLC of Formula: 1530-32-1 The article contains the following contents:

Herein a three-component 1,2-amidoazidation of 1,3-dienes was reported. In the presence of fac-Ir(ppy)3 under blue LED irradiation, reaction of 1-aryl substituted 1,3-dienes with N-amidopyridinium salt and trimethylsilyl azide (TMSN3) affords exclusively the 1,2-amidoazidation products. The 1-alkyl substituted counterparts undergo the same reaction with moderate to high 1,2- vs 1,4-selectivity. Reduction of this mixture with PPh3 under dynamic kinetic conditions enriches significantly one of the two isomers thanks to the facile 1,3-azide shift (Winstein rearrangement) of the allyl azides. The results came from multiple reactions, including the reaction of Ethyltriphenylphosphonium bromide(cas: 1530-32-1HPLC of Formula: 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.HPLC of Formula: 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Urgel, Jose I.; Bock, Julian; Di Giovannantonio, Marco; Ruffieux, Pascal; Pignedoli, Carlo A.; Kivala, Milan; Fasel, Roman published their research in RSC Advances in 2021. The article was titled 《On-surface synthesis of π-conjugated ladder-type polymers comprising nonbenzenoid moieties》.Synthetic Route of C14H8Br2 The article contains the following contents:

On-surface synthesis provides a powerful approach toward the atomically precise fabrication of π-conjugated ladder polymers (CLPs). We report herein the surface-assisted synthesis of nonbenzenoid CLPs from cyclopenta-annulated anthracene monomers on Au(111) under ultrahigh vacuum conditions. Successive thermal annealing steps reveal the dehalogenative homocoupling to yield an intermediate 1D polymer and the subsequent cyclodehydrogenation to form the fully conjugated ladder polymer. Notably, neighboring monomers may fuse in two different ways, resulting in six- and five-membered rings, resp. The structure and electronic properties of the reaction products have been investigated via low-temperature scanning tunneling microscopy and spectroscopy, complemented by d.-functional theory calculations Our results provide perspectives for the on-surface synthesis of nonbenzenoid CLPs with the potential to be used for organic electronic devices. In the experimental materials used by the author, we found 9,10-Dibromoanthracene(cas: 523-27-3Synthetic Route of C14H8Br2)

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.Synthetic Route of C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Chi, Kailin; Xu, Hansi; Feng, Bingtao; Meng, Xianwei; Yu, Daoyu; Li, Qian published their research in Nanomaterials in 2021. The article was titled 《Controlled Growth of Porous InBr3: PbBr2 Film for Preparation of CsPbBr3 in Carbon-Based Planar Perovskite Solar Cells》.Computed Properties of Br3In The article contains the following contents:

Due to the low solubility of CsBr in organic solvents, the CsPbBr3 film prepared by the multi-step method has holes and insufficient thickness, and the light absorption capacity and c.d. of the perovskite film hinder the further improvement in the power conversion efficiency (PCE) of CsPbBr3 solar cells. In this study, we introduced InBr3 into the PbBr2 precursor solution and adjusted the concentration of PbBr2, successfully prepared PbBr2 with a porous structure on the compact TiO2 (c-TiO2) substrate to ensure that it fully reacted with CsBr, and obtained the planar carbon-based CsPbBr3 solar cells with high-quality perovskite film. The results reveal that the porous PbBr2 structure and the increasing PbBr2 concentration are beneficial to increase the thickness of the CsPbBr3 films, optimize the surface morphol., and significantly enhance the light absorption capacity. Finally, the PCE of the CsPbBr3 solar cells obtained after conditions optimization was 5.76%.Indium(III) bromide(cas: 13465-09-3Computed Properties of Br3In) was used in this study.

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.Computed Properties of Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Organic Letters included an article by Ju, Baihang; Chen, Shigui; Kong, Wangqing. Product Details of 1779-49-3. The article was titled 《Pd-Catalyzed Enantioselective Double Heck Reaction》. The information in the text is summarized as follows:

An asym. Pd-catalyzed intra- followed by an intermol. double Heck reaction of arenediazonium salts with simple alkenes is disclosed. This reaction features mild reaction conditions, simple operation and excellent functional group tolerance, provides a rapid access to functionalized dihydrobenzofurans bearing all-carbon quaternary centers in good regioselectivity (>95/5) and enantioselectivity (90-99% ee). The results came from multiple reactions, including the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3Product Details of 1779-49-3)

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is an organophosphorus compound, with potential use as a precursor and a solvent in organic synthesis. And it is used widely for methylenation via the Wittig reaction.Product Details of 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Dyes and Pigments included an article by Zhao, Fei; Chen, Zhao; Fan, Congbin; Liu, Gang; Pu, Shouzhi. Recommanded Product: 6825-20-3. The article was titled 《Aggregation-induced emission (AIE)-active highly emissive novel carbazole-based dyes with various solid-state fluorescence and reversible mechanofluorochromism characteristics》. The information in the text is summarized as follows:

Three new carbazole-based fluorescent mols. 1-3 functionalized with tetraphenylethene were successfully synthesized, and these compounds have high thermal stability, and they exhibited different fluorescence in solid states with the superior luminescence quantum yields of 99.04% (1), 98.90% (2) and 39.83% (3). Their aggregation-induced behaviors were explored by the study of photoluminescence spectroscopy. Luminogens 1-3 exhibited remarkable aggregation-induced emission effect. Also, their distinct mech. stimulus-responsive fluorescence characteristics were also surveyed by solid-state photoluminescence spectroscopy. The various emitting colors of these luminogens could be changed into the same green, and the repeatabilities of their mechanochromic luminescence behaviors were outstanding, and the powder x-ray diffraction results indicated that the reversible conversion from a crystalline to an amorphous state was responsible for the obvious mechanofluorochromism phenomena of compounds 1-3. This work will be valuable for the exploitation of mech.-force sensors with typical aggregation-induced emission feature. In the experiment, the researchers used 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

In 2019,ACS Catalysis included an article by Wang, Quannan; Chen, Rongjun; Lou, Jiang; Zhang, Dong H.; Zhou, Yong-Gui; Yu, Zhengkun. Quality Control of Methyltriphenylphosphonium bromide. The article was titled 《Highly Regioselective C-H Alkylation of Alkenes Through an Aryl to Vinyl 1,4-Palladium Migration/C-C Cleavage Cascade》. The information in the text is summarized as follows:

Palladium-catalyzed C-H alkylation of gem-disubstituted ethylenes has been efficiently achieved with cyclobutanols as the coupling partners through an aryl to vinyl 1,4-palladium migration/ring-opening C-C cleavage cascade, giving trisubstituted alkenes in high yields. The protocol features good regioselectivity, high yields, broad substrate scopes, and good functional group tolerance. The mechanistic studies implicate that the cross-coupling reaction occurs via oxidative addition, 1,4-palladium migration, ring-opening C-C cleavage, and reductive elimination. DFT calculations have revealed that the high efficiency of the protocol is attributed to the thermodynamically favored 1,4-palladium migration assisted by 2-fluorophenol. In the experimental materials used by the author, we found Methyltriphenylphosphonium bromide(cas: 1779-49-3Quality Control of Methyltriphenylphosphonium bromide)

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. Quality Control of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2018,Yonekura, Kyohei; Shinoda, Mika; Yonekura, Yuko; Tsuchimoto, Teruhisa published 《Indium-catalyzed annulation of o-acylanilines with alkoxyheteroarenes: synthesis of heteroaryl[b]quinolines and subsequent transformation to cryptolepine derivatives》.Molecules published the findings.Category: bromides-buliding-blocks The information in the text is summarized as follows:

An efficient method for the synthesis of heteroaryl[b]quinolines such as I [R = H, 4-OH, 2,3-di-MeO, etc.; R1 = Me, i-Pr, Ph, etc.; X = N, S] was developed via annulation of o-acylanilines and MeO-heteroarenes using an indium Lewis acid as catalyst for tandem N-C and C-C bond formation. A series of indolo[3,2-b]quinolines was subsequently transformed to structurally unprecedented cryptolepine derivatives Mechanistic studies showed that the N-C bond formation was followed by the C-C bond formation. The indium-catalyzed annulation reaction thus started with the nucleophilic attack of the NH2 group of o-acylanilines to the MeO-connected carbon atom of the heteroaryl ring in an SNAr fashion and thereby the N-C bond was formed. The resulting intermediate then cyclized and gave C-C bond through the nucleophilic attack of the heteroaryl-ring-based carbon atom to the carbonyl carbon atom, provided the HA[b]Q after aromatizing dehydration. The experimental process involved the reaction of Indium(III) bromide(cas: 13465-09-3Category: bromides-buliding-blocks)

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.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary