Tag: 200-300

He, Xinxin; Wang, Xinyan; Tse, Ying-Lung Steve; Ke, Zhihai; Yeung, Ying-Yeung published their research in ACS Catalysis in 2021. The article was titled 《Bis-selenonium Cations as Bidentate Chalcogen Bond Donors in Catalysis》.Quality Control of 5-Bromobenzo[d][1,3]dioxole The article contains the following contents:

Hydrolytically stable bidentate Lewis acid catalysts derived from selenonium dicationic centers were developed. The bis-selenonium catalysts were employed in the activation of imine and carbonyl groups in various transformations with good yields and selectivity. Lewis acidity of the bis-selenonium salts was found to be stronger than that of the monoselenonium systems, attributed to the synergistic effect of the two cationic selenonium centers. In addition, the bis-selenonium catalysts were not inhibited by strong bases or moisture. In addition to this study using 5-Bromobenzo[d][1,3]dioxole, there are many other studies that have used 5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4Quality Control of 5-Bromobenzo[d][1,3]dioxole) was used in this study.

Furthermore, the coupling of 5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4) with β-methallyl alcohol was catalyzed by Pd(OAc)2 in combination with P(t-Bu)3.Quality Control of 5-Bromobenzo[d][1,3]dioxole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sole, Roberto; Buranello, Chiara; Bardella, Noemi; Di Michele, Alessandro; Paganelli, Stefano; Beghetto, Valentina published their research in Catalysts in 2021. The article was titled 《Recyclable Ir Nanoparticles for the Catalytic Hydrogenation of Biomass-Derived Carbonyl Compounds》.Recommanded Product: Ethyl 5-bromovalerate The article contains the following contents:

The valorisation of biomass-derived platform chems. via catalytic hydrogenation is an eco-friendly tool which allows authors to recover bio-based building blocks and produce fine chems. with high industrial appeal. In the present study, a novel surfactant-type triazolyl-thioether ligand was prepared, showing excellent catalytic activity in the presence of bis(1,5-cyclooctadiene)diiridium(I) dichloride [Ir(COD)Cl]2 for the hydrogenation of furfural, cinnamaldehyde, levulinic acid, 5-hydroxymethylfurfural, vanillin, and citral. Easy recovery by liquid/liquid extraction allowed authors to recover the catalyst, which could then be efficiently recycled up to 11 times for the hydrogenation of furfural. In-depth anal. revealed the formation of spherical structures with metal nanoparticles as big as 2-6 nm surrounded by the anionic ligand, preventing iridium nanoparticle degradation In the experiment, the researchers used Ethyl 5-bromovalerate(cas: 14660-52-7Recommanded Product: Ethyl 5-bromovalerate)

Ethyl 5-bromovalerate(cas: 14660-52-7) belongs to bromides. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents.Recommanded Product: Ethyl 5-bromovalerate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《A Highly Stable and Tunable Visible-Near-IR Electrochromic All-in-One Gel Device》 was written by Ling, Huan; Su, Fengyu; Tian, Yanqing; Luo, Dan; Liu, Yan Jun; Sun, Xiao Wei. Category: bromides-buliding-blocks And the article was included in ChemPhotoChem in 2020. The article conveys some information:

Energy saving is a global topic of critical importance. Electrochromic devices (ECDs) could be used to control energy flow by modulating the light absorption reversibly upon application of a small potential bias. Herein, a visible-NIR dual-band ECD based on the viologen analog 4, 4′-(thiophene-2, 5-diyl) bis(1-methylpyridin-1-ium) diiodide (TMP) was assembled with a simple all-in-one configuration. The TMP-based gel ECD possesses high dynamic contrast (81.7 % at 570 nm, 68.6 % at 835 nm, 62.8 % at 910 nm and 55.3 % at 1046 nm), excellent cyclic stability (70.6 % of ΔT at 570 nm maintained after 25000 cycles at 1.4 V), and low power consumption (15.2 mJ/cm2 to complete the coloring process, 2.5 mW/cm2 to keep color and low transmittance). Remarkably, the absorption of visible and NIR light could be selectively adjusted by varying the coloring time. For comparison, a di-Me viologen (DMV)-based gel ECD was fabricated, and the SAR (structure-activity relationship) was established by cyclic voltammetry, d. functional theory (DFT) calculations, and other electrochromic performance parameters. In addition to this study using 2,5-Dibromothiophene, there are many other studies that have used 2,5-Dibromothiophene(cas: 3141-27-3Category: bromides-buliding-blocks) was used in this study.

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used as starting reagent for the synthesis of α,α′-didecylquater-, -quinque- and -sexi-thiophenes.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Palladium-Catalyzed Synthesis of 1,2-Diketones from Aryl Halides and Organoaluminum Reagents Using tert-Butyl Isocyanide as the CO Source》 was published in Organic Letters in 2020. These research results belong to Chen, Bo; Wu, Xiao-Feng. Safety of 5-Bromobenzo[d][1,3]dioxole The article mentions the following:

In this work, an interesting and practical procedure for the synthesis of 1,2-diketones from aryl halides and organoaluminum reagents has been developed. Employing tert-Bu isocyanide as the CO source and palladium as the catalyst, the desired 1,2-diketones were isolated in good to excellent yields with good functional group tolerance. Concerning the reaction partners, besides aryl halides, both alkyl- and arylaluminum reagents were all suitable substrates here.5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4Safety of 5-Bromobenzo[d][1,3]dioxole) was used in this study.

Furthermore, the coupling of 5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4) with β-methallyl alcohol was catalyzed by Pd(OAc)2 in combination with P(t-Bu)3.Safety of 5-Bromobenzo[d][1,3]dioxole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Pd-Catalyzed Stereospecific Cross-Coupling of Chiral α-Borylalkylcopper Species with Aryl Bromides》 was published in ACS Catalysis in 2020. These research results belong to Lee, Hyesu; Lee, Soyeon; Yun, Jaesook. COA of Formula: C7H5BrO2 The article mentions the following:

Stereospecific cross-coupling of chiral α-borylalkylcopper species with aryl bromides was achieved using a Pd catalyst. The combination of a Cu catalyst and chiral NHC ligand was efficient for the generation of enantioenriched secondary α-borylorganocopper species via addition of a Cu-Bpin (= pinacol boronic ester) species to alkenyl boramides. Subsequent stereospecific cross-coupling of such organocopper nucleophiles with aryl bromides successfully proceeded with a Pd-XPhos catalyst. Using 1,2-disubstituted borylalkenes containing a 1,8-naphthalenediaminatoboryl (Bdan) group produced the corresponding anti-diborylalkanes as a single diastereomer with good enantioselectivity up to 96.5:3.5 er, and subsequent oxidation generated the corresponding anti-1,2-dihydroxyl compounds5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4COA of Formula: C7H5BrO2) was used in this study.

Furthermore, the coupling of 5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4) with β-methallyl alcohol was catalyzed by Pd(OAc)2 in combination with P(t-Bu)3.COA of Formula: C7H5BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Bis(benzo[h]quinolin-10-olato-κ2N,O)bromidomanganese(III)》 was published in IUCrData in 2020. These research results belong to Papa, Veronica; Spannenberg, Anke; Beller, Matthias; Junge, Kathrin. Related Products of 14516-54-2 The article mentions the following:

The title compound, [MnBr(C13H8NO)2], consists of a manganese(III) atom, which is coordinated by one bromido and two benzo[h]quinolin-10-olato ligands. The MnIII complex exhibits a distorted square-pyramidal coordination geometry with the Br ligand in the apical position. Neighboring complexes are held together by π-π interactions and weak C-H···Br hydrogen bonds. In the experiment, the researchers used many compounds, for example, Bromopentacarbonylmanganese(I)(cas: 14516-54-2Related Products of 14516-54-2)

Bromopentacarbonylmanganese(I)(cas: 14516-54-2) has many other uses. It is used in the formation of (eta6-arene)tricarbonylmanganese(I) by reacting with arene (arene= hexamethyl benzene, 1,2,4,5-tetramethyl benzene, mesitylene, p-xylene and toluene) in the presence silver salt.Related Products of 14516-54-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《NCα-gem-dimethylated peptoid side chains: A novel approach for structural control and peptide sequence mimetics》 were Shyam, Radhe; Nauton, Lionel; Angelici, Gaetano; Roy, Olivier; Taillefumier, Claude; Faure, Sophie. And the article was published in Biopolymers in 2019. Application of 5437-45-6 The author mentioned the following in the article:

The design of linear peptoid oligomers adopting well-defined secondary structures while mimicking defined peptide primary sequences is a major challenge in the context of drug discovery. To this end, chemists have developed cis-inducing peptoid side chains to build robust polyproline type I helixes. However, the number of efficient examples remains scarce and chem. diversity accessible through the use of these side chains is limited. Herein, we introduce an array of NCα-gem-dimethylated peptoid residues mimicking proteinogenic amino acids. Submonomer synthesis and block-coupling approaches were explored to access heterooligomers incorporating these novel types of side chains. NMR studies of monomer and trimer models showed that the NCα-gem-dimethylated groups exert complete cis control on the backbone amide conformation. Lastly, a preliminary mol. modeling study gave an insight into the preferred orientation of the substituents of the NCα-gem-dimethyl side chains relative to the peptoid backbone. After reading the article, we found that the author used Benzyl 2-bromoacetate(cas: 5437-45-6Application of 5437-45-6)

Benzyl 2-bromoacetate(cas: 5437-45-6) has been used in the alkylation of (-)-2,3-O-isopropylidene-D-threitol that afforded lipopeptide, 2-[(4R,5R)-5-({[(9H-fluoren-9-yl)methoxy]carbonylaminomethyl}-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy]acetic acid.Application of 5437-45-6

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2018,Smith, Joel D.; Chih, Edwina; Piers, Warren E.; Spasyuk, Denis M. published 《Tuning iridium(I) PCcarbeneP frameworks for facile cooperative N2O reduction》.Polyhedron published the findings.Product Details of 626-40-4 The information in the text is summarized as follows:

Two electron-rich PCP ligands were synthesized featuring -CMe2- and -SiMe2- functional groups linking the framework backbone. PCcarbeneP-Ir-Cl complexes were prepared via double C-H activation protocols and the donor strengths of the new ligands were evaluated using CO stretching frequencies of monocarbonyl cations prepared from the corresponding carbene chlorides. The new tethered systems are superior donors with respect to PCcarbeneP pincer complexes previously reported in the authors’ group. These carbene chloride complexes reacted readily with nitrous oxide (N2O) to form iridaepoxides immune to unwanted Caryl-Canchor cleavage. Rates of O atom transfer from N2O to PCcarbeneP-Ir-Cl compounds were also measured using 31P{1H} NMR spectroscopy. Results suggested a direct pos. correlation between ligand donicity and O-atom transfer rate for all ortho-phenylene derived systems. The sterically distinct 2,3-benzo[b]thiophene scaffold is an outlier of this trend with a relatively high reactivity rate and νCO.3,5-Dibromoaniline(cas: 626-40-4Product Details of 626-40-4) was used in this study.

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime.Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. 1H NMR signals for amines disappear upon treatment of the sample with D2O. In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one.Product Details of 626-40-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Direct Triple Annulations: A Way to Design Large Triazastarphenes with Intertwined Hexagonal Packing》 was written by Li, Qian; Moussallem, Chady; Castet, Frederic; Muccioli, Luca; Dourges, Marie-Anne; Toupance, Thierry; Nicolas, Yohann. COA of Formula: C9H11BrO3This research focused ontriazastarphene preparation charge transport intertwined hexagonal packing. The article conveys some information:

A new straightforward synthetic strategy was elaborated to achieve star-shaped triazatrinaphthylene and, for the first time, triazatrianthrylene derivatives I [R = Ph, 4-MeC6H4] and II [R1 = C=CSi(i-Pr)3, Ph, 3, 4,5-tri-MeOC6H2, etc.]. Their solution- and solid-state properties were thoroughly characterized by cyclic voltammetry, UV-vis absorption spectroscopy, X-ray diffraction, and d. functional theory calculations Original hexagonal mol. arrangements were found in the crystal phase, which opens a new pathway for designing materials with improved three-dimensional charge-transport properties. In the experiment, the researchers used many compounds, for example, 1-Bromo-3,4,5-trimethoxybenzene(cas: 2675-79-8COA of Formula: C9H11BrO3)

1-Bromo-3,4,5-trimethoxybenzene(cas: 2675-79-8) is an important raw material and intermediate used in organic synthesis, pharmaceuticals, agrochemicals and dyestuff.COA of Formula: C9H11BrO31-Bromo-3,4,5-trimethoxybenzene can be used to synthesize analogs of HA14-1, which shows promising anticancer properties.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Bonfant, Giulia; Balestri, Davide; Perego, Jacopo; Comotti, Angiolina; Bracco, Silvia; Koepf, Matthieu; Gennari, Marcello; Marchio, Luciano published an article in ACS Omega. The title of the article was 《Phosphine Oxide Porous Organic Polymers Incorporating Cobalt(II) Ions: Synthesis, Characterization, and Investigation of H2 Production》.COA of Formula: C8H8Br2 The author mentioned the following in the article:

Suitably functionalized porous matrixes represent versatile platforms to support well-dispersed catalytic centers. In the present study, porous organic polymers (POPs) containing phosphine oxide groups were fabricated to bind transition metals and to be investigated for potential electrocatalytic applications. Crosslinking of mono- and di-phosphine monomers with multiple Ph substituents was subject to the Friedel-Crafts (F-C) reaction and the oxidation process, which generated phosphine oxide porous polymers with pore capacity up to 0.92 cm3/g and a surface area of about 990 m2/g. The formation of the R3P·BH3 borohydride adduct during synthesis allows to extend the library of phosphine-based monomeric entities when using FeCl3. The porous polymers were loaded with 0.8-4.2 weight/weight % of cobalt(II) and behaved as hydrogen evolution reaction (HER) catalysts with a Faradaic efficiency of up to 95% (5.81 x 10-5 mol H2 per 11.76 C) and a stable c.d. during repeated controlled potential experiments (CPE), even though with high overpotentials (0.53-0.68 V to reach a c.d. of 1 mA·cm-2). These studies open the way to the effectiveness of tailored phosphine oxide POPs produced through an inexpensive and ecofriendly iron-based catalyst and for the insertion of transition metals in a porous architecture, enabling electrochem. driven activation of small mols. The experimental part of the paper was very detailed, including the reaction process of 1,4-Bis(bromomethyl)benzene(cas: 623-24-5COA of Formula: C8H8Br2)

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) belongs to organobromine compounds.Most of the natural organobromine compounds are produced by marine organisms , and several brominated metabolites with antibacterial , antitumor , antiviral , and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. Moreover, several studies demonstrate that the average proportion of bromine in drugs is significantly higher than that in natural products. COA of Formula: C8H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary