Tag: 300-400

Wickrama-Arachchige, Anura Upasanta-Kumara; Guruge, Keerthi S.; Inagaki, Yuriko; Tani, Hinako; Dharmaratne, Tilak Siri; Niizuma, Yasuaki; Ohura, Takeshi published their research in Food Chemistry in 2021. The article was titled 《Halogenated polycyclic aromatic hydrocarbons in edible aquatic species of two Asian countries: Congener profiles, biomagnification, and human risk assessment》.Application In Synthesis of 9,10-Dibromoanthracene The article contains the following contents:

Seventy-five contaminants including chlorinated/brominated/parent polycyclic aromatic hydrocarbons (Cl/Br/PAHs) were investigated in 29 edible aquatic species from the Indian Ocean near Sri Lanka and 10 species from the Pacific Ocean near Japan. Concentrations of total ClPAHs and BrPAHs in the samples were 2.6-57 and 0.30-9.5 ng/g-dry weight from the Indian Ocean, and 0.35-18 and 0.03-3.3 ng/g-dry weight from the Pacific Ocean, resp. Comparing the profiles of Cl/BrPAHs among the samples, congeners of chlorinated and brominated pyrene were predominant components and enhanced the potential for biomagnification in the sample from the off-shore pelagic environment in the Indian Ocean. The incremental lifetime cancer risks estimated by intake of the targets in consuming aquatic organisms showed that approx. one-third of studied organisms exceeded the acceptable risk level for Sri Lankans. In the experiment, the researchers used many compounds, for example, 9,10-Dibromoanthracene(cas: 523-27-3Application In Synthesis of 9,10-Dibromoanthracene)

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.Application In Synthesis of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Synthesis of novel multifunctional carbazole-based molecules and their thermal, electrochemical and optical properties》 was written by Altinolcek, Nuray; Battal, Ahmet; Tavasli, Mustafa; Peveler, William J.; Yu, Holly A.; Skabara, Peter J.. Name: 3,6-Dibromo-9H-carbazole And the article was included in Beilstein Journal of Organic Chemistry in 2020. The article conveys some information:

Two novel carbazole-based compounds I [R = 4-formyl, 5-formyl] were synthesized as potential candidates for application in organic electronics. The materials were fully characterised by NMR spectroscopy, mass spectrometry, FTIR, thermogravimetric anal., differential scanning calorimetry, cyclic voltammetry, and absorption and emission spectroscopy. Compounds I, both of which were amorphous solids, were stable up to 291°C and 307°C, resp. Compounds I showed three distinctive absorption bands: high and mid energy bands due to locally excited (LE) transitions and low energy bands due to intramol. charge transfer (ICT) transitions. In dichloromethane solutions compounds I gave emission maxima at 561 nm and 482 nm with quantum efficiencies of 5.4% and 97.4% ± 10%, resp. At pos. potential, compounds I gave two different oxidation peaks, resp.: quasi-reversible at 0.55 V and 0.71 V, and reversible at 0.84 V and 0.99 V. At neg. potentials, compounds I only exhibited an irreversible reduction peak at -1.86 V and -1.93 V, resp. The experimental process involved the reaction of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Name: 3,6-Dibromo-9H-carbazole)

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.Name: 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Synthesis of All-Carbon Quaternary Centers by Palladium-Catalyzed Olefin Dicarbofunctionalization》 was published in Angewandte Chemie, International Edition in 2020. These research results belong to Koy, Maximilian; Bellotti, Peter; Katzenburg, Felix; Daniliuc, Constantin G.; Glorius, Frank. Reference of Methyltriphenylphosphonium bromide The article mentions the following:

The redox-neutral dicarbofunctionalization of tri- and tetrasubstituted olefins to form a variety of (hetero)cyclic compounds under photoinduced palladium catalysis is described. This cascade reaction process was used to couple styrenes or acryl amides with a broad range of highly decorated olefins tethered to aryl or alkyl bromides (>50 examples). This procedure enables one or two contiguous all-carbon quaternary centers to be formed in a single step. The products could be readily diversified and applied in the synthesis of a bioactive oxindole analog. The experimental part of the paper was very detailed, including the reaction process of Methyltriphenylphosphonium bromide(cas: 1779-49-3Reference 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. Reference of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Cooperative NHC and Photoredox Catalysis for the Synthesis of β-Trifluoromethylated Alkyl Aryl Ketones》 was written by Meng, Qing-Yuan; Doeben, Nadine; Studer, Armido. HPLC of Formula: 1779-49-3This research focused ontrifluoromethyl alkyl aryl ketone preparation; cooperative photoredox catalyzed trifluoromethylation styrene acid fluoride; NHC catalysis; trifluoromethylation; visible light catalysis. The article conveys some information:

Despite the great potential of radical chem. in organic synthesis, N-heterocyclic carbene (NHC)-catalyzed reactions involving radical intermediates are not well explored. This communication reports the three-component coupling of aroyl fluorides, styrenes and the Langlois reagent (CF3SO2Na) to give various β-trifluoromethylated alkyl aryl ketones with good functional group tolerance in moderate to high yields by cooperative photoredox/NHC catalysis. The alkene acyltrifluoromethylation proceeds via radical/radical cross coupling of ketyl radicals with benzylic C-radicals. The ketyl radicals are generated via SET reduction of in situ formed acylazolium ions whereas the benzylic radicals derive from trifluoromethyl radical addition onto styrenes. In addition to this study using Methyltriphenylphosphonium bromide, there are many other studies that have used Methyltriphenylphosphonium bromide(cas: 1779-49-3HPLC of Formula: 1779-49-3) was used in this study.

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is a lipophilic molecule with a cation allowing for it to be used to deliver molecules to specific cell components. Also considered an antineoplastic agent.HPLC of Formula: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Zhongchao; Chen, Sijia; Tang, Fu; Guo, Kai; Liang, Xin-Ting; Huang, Jun; Yang, Zhen published their research in Journal of the American Chemical Society in 2021. The article was titled 《Total Synthesis of (+)-Cyclobutastellettolide B》.Quality Control of Ethyltriphenylphosphonium bromide The article contains the following contents:

A convenient enantioselective total synthesis of (+)-cyclobutastellettolide B (I) via a strategy that involves a diastereoselective Johnson-Claisen rearrangement, a regioselective cyclopropoxytrimethylsilane ring-opening reaction, and a Norrish-Yang cyclization is described. The results of computational and exptl. studies indicate that the regio- and stereoselectivity of the Norrish-Yang reaction are controlled by the C-H bond dissociation energy and restricted rotation of the C13-C14 bond. In the experiment, the researchers used many compounds, for example, 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

《Extractive desulfurization of fuels using diglycol based deep eutectic solvents》 was published in Journal of Environmental Chemical Engineering in 2020. These research results belong to Jha, Divyam; Haider, Mohd Belal; Kumar, Rakesh; Balathanigaimani, Marriyappan Sivagnanam. Formula: C19H18BrP The article mentions the following:

In this work, the effect of Deep Eutectic Solvents (DESs) on sulfur extraction of organo-sulfur compounds was investigated. Different DESs were prepared using a common hydrogen bond donor, Diglycol, and different hydrogen bond acceptors. The effects of experiment variables such as temperature, DESs/feed ratio, and the time on desulfurization efficiency of different organo-sulfur compounds were also studied. Results show that Tetra Bu ammonium bromide based DES showed relatively higher sulfur removal capabilities (Dibenzothiophene (DBT): -92%, 2- Methylthiophene (2-MT): -86% and Thiophene (T): -71%) as compared to other DESs. Also, all DESs have higher DBT extraction efficiency followed by 2-MT and T. Further, non-random two liquids (NRTL) thermodn. model was employed to model liquid-liquid equilibrium The experimental part of the paper was very detailed, including the reaction process of Methyltriphenylphosphonium bromide(cas: 1779-49-3Formula: C19H18BrP)

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.Formula: C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Trifluorinated Tetralins via I(I)/I(III)-Catalysed Ring Expansion: Programming Conformation by [CH2CH2] → [CF2CHF] Isosterism》 was written by Neufeld, Jessica; Stuenkel, Timo; Mueck-Lichtenfeld, Christian; Daniliuc, Constantin G.; Gilmour, Ryan. HPLC of Formula: 1779-49-3This research focused ontrifluorinated tetralin synthesis iodine catalyzed ring expansion fluorinated methyleneindane; fluorination; iodine(III); organocatalysis; ring expansion; tetralin. The article conveys some information:

Saturated, fluorinated carbocycles are emerging as important modules for contemporary drug discovery. To expand the current portfolio, the synthesis of novel trifluorinated tetralins has been achieved. Fluorinated methyleneindanes serve as convenient precursors and undergo efficient difluorinative ring expansion with in situ generated p-TolIF2 (>20 examples, up to >95%). A range of diverse substituents are tolerated under standard catalysis conditions and this is interrogated by Hammett anal. X-ray anal. indicates a preference for the CH-F bond to occupy a pseudo-axial orientation, consistent with stabilizing σC-H→σC-F* interactions. The replacement of the sym. [CH2-CH2] motif by [CF2-CHF] removes the conformational degeneracy intrinsic to the parent tetralin scaffold leading to a predictable half-chair. The conformational behavior of this novel structural balance has been investigated by computational anal. and is consistent with stereoelectronic theory. In addition to this study using Methyltriphenylphosphonium bromide, there are many other studies that have used Methyltriphenylphosphonium bromide(cas: 1779-49-3HPLC of Formula: 1779-49-3) was used in this study.

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is a lipophilic molecule with a cation allowing for it to be used to deliver molecules to specific cell components. Also considered an antineoplastic agent.HPLC of Formula: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Application of 1530-32-1In 2022 ,《Catalytic, contra-Thermodynamic Positional Alkene Isomerization》 was published in Journal of the American Chemical Society. The article was written by Occhialini, Gino; Palani, Vignesh; Wendlandt, Alison E.. The article contains the following contents:

The discovery of a dual catalyst system that promotes contra-thermodn. positional alkene isomerization under photochem. irradiation, providing access to terminal alkene isomers, e.g., (2-methylallyl)benzene directly from conjugated, internal alkene, e.g., (2-methylpropenyl)benzene starting materials was reported. The utility of the method is demonstrated in the deconjugation of diverse electron-rich/electron-poor alkenes and through strategic application to natural product synthesis, e.g., (-)-nopinone. Mechanistic studies are consistent with a regiospecific bimol. homolytic substitution (SH2′) mechanism proceeding through an allyl-cobaloxime intermediate. The experimental process involved the reaction of Ethyltriphenylphosphonium bromide(cas: 1530-32-1Application 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. CatOnium ETPB is also used as catalysts in the synthesis of certain organic compounds.Application of 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Angelucci, Francesco; Cirillo, Davide; Bjoersvik, Hans-Rene published an article in 2022. The article was titled 《Imidazole Backbone Functionalization with Olefin Cross-Metathesis》, and you may find the article in European Journal of Organic Chemistry.Related Products of 1530-32-1 The information in the text is summarized as follows:

A selective and high-rate Ru-catalyzed cross-metathesis reaction of alkenes with vinylimidazole was disclosed. Cross-metathesis was known to operate less efficiently on N-heterocycles, but through optimization by means of statistical exptl. design and multiple regression, optimal reaction conditions were identified that allowed for consistent high-yields without the need of overly complicated set-ups or additives. The method was tested on a series of terminal alkene reagents with a variety of different functional groups and it provides the corresponding target mols. in good to high yields. The results came from multiple reactions, including the reaction of 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

Mumford, Emily M.; Hemric, Brett N.; Denmark, Scott E. published an article in 2021. The article was titled 《Catalytic, Enantioselective Syn-Oxyamination of Alkenes》, and you may find the article in Journal of the American Chemical Society.Product Details of 1530-32-1 The information in the text is summarized as follows:

The chemo-, regio-, diastereo-, and enantioselective 1,2-oxyamination of alkenes R1CH=CHR2 (R1 = n-Pr, Ph, thiophen-3-yl, naphthalen-2-yl, etc.; R2 = i-Pr, (benzyloxy)methyl, (1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl)methyl, etc.) using selenium(II/IV) catalysis with a chiral diselenides I (R = tert-Bu, Ph, adamantan-2-yl , naphthalen-2-yl) catalyst is reported. This method uses N-tosylamides R3C(O)NHTs (R3 = 2,6-dimethylphenyl, 2-bromophenyl, naphthalen-1-yl, etc.) to generate oxazoline products syn-II that are useful both as protected 1,2-amino alc. motifs and as chiral ligands. The reaction proceeds in good yields with excellent enantio- and diastereoselectivity for a variety of alkenes and pendant functional groups such as sulfonamides, alkyl halides, and glycol-protected ketones. Furthermore, the rapid generation of oxazoline products syn-II are demonstrated in the expeditious assembly of chiral PHOX ligands as well as diversely protected amino alcs. The results came from multiple reactions, including 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. CatOnium ETPB is also used as catalysts in the synthesis of certain organic compounds.Product Details of 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary