Tag: 300-400

Product Details of 1530-32-1In 2021 ,《Reductive Activation and Hydrofunctionalization of Olefins by Multiphoton Tandem Photoredox Catalysis》 appeared in ACS Catalysis. The author of the article were Czyz, Milena L.; Taylor, Mitchell S.; Horngren, Tyra H.; Polyzos, Anastasios. The article conveys some information:

The conversion of olefin feedstocks to architecturally complex alkanes represents an important strategy in the expedient generation of valuable mols. for the chem. and life sciences. Synthetic approaches are reliant on the electrophilic activation of unactivated olefins, necessitating functionalization with nucleophiles. However, the reductive functionalization of unactivated and less activated olefins with electrophiles remains an ongoing challenge in synthetic chem. Here, we report the nucleophilic activation of inert styrenes through a photoinduced direct single electron reduction to the corresponding nucleophilic radical anion. Central to this approach is the multiphoton tandem photoredox cycle of the iridium photocatalyst [Ir(ppy)2(dtb-bpy)]PF6, which triggers in situ formation of a high-energy photoreductant that selectively reduces styrene olefinic π bonds to radical anions without stoichiometric reductants or dissolving metals. This mild strategy enables the chemoselective reduction and hydrofunctionalization of styrenes to furnish valuable alkane and tertiary alc. derivatives Mechanistic studies support the formation of a styrene olefinic radical anion intermediate and a Birch-type reduction involving two sequential single electron transfers. Overall, this complementary mode of olefin activation achieves the hydrofunctionalization of less activated alkenes with electrophiles, adding value to abundant olefins as valuable building blocks in modern synthetic protocols. In the experiment, the researchers used 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

In 2022,Ferretti, Francesco; Fouad, Manar Ahmed; Ragaini, Fabio published an article in Catalysts. The title of the article was 《Synthesis of Indoles by Palladium-Catalyzed Reductive Cyclization of β-Nitrostyrenes with Phenyl Formate as a CO Surrogate》.Safety of Ethyltriphenylphosphonium bromide The author mentioned the following in the article:

The synthesis of indoles by reductive cyclization of o-nitrostyrenes using Ph formate as a CO surrogate, using a palladium/1,10-phenanthroline complex as catalyst was recently reported. However, depending on the desired substituents on the structure, the use of β-nitrostyrenes as alternative reagents may be advantageous. The results of this study on the possibility to use Ph formate as a CO surrogate in the synthesis of indoles by reductive cyclization of β-nitrostyrenes, using PdCl2(CH3CN)2+phenanthroline as the catalyst was reported. It turned out that good results obtained when the starting nitrostyrene bears an aryl substituent in the alpha position. However, when no such substituent present, only fair yield of indole was obtained because the base required to decompose the formate also catalyzes an oligo-polymerization of the starting styrene. The reaction performed in a single glass pressure tube, a cheap and easily available piece of equipment. After reading the article, we found that the author used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Safety 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. CatOnium ETPB is also used as catalysts in the synthesis of certain organic compounds.Safety of Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,ACS Catalysis included an article by Hemric, Brett N.; Chen, Andy W.; Wang, Qiu. Recommanded Product: 1779-49-3. The article was titled 《Copper-Catalyzed 1,2-Amino Oxygenation of 1,3-Dienes: A Chemo-, Regio-, and Site-Selective Three-Component Reaction with O-Acylhydroxylamines and Carboxylic Acids》. The information in the text is summarized as follows:

A three-component reaction for 1,2-amino oxygenation of 1,3-dienes has been achieved using O-acyl hydroxylamines and carboxylic acids. The reaction occurs through copper-catalyzed amination of olefins followed by nucleophilic addition of carboxylic acids, offering high levels of chemo-, regio-, and site-selectivity. The method is effective for both terminal and internal 1,3-dienes, including those bearing multiple, unsym. substituents. The amino oxygenation conditions also exhibited remarkable selectivity toward 1,3-dienes over alkenes, good tolerance of sensitive functional groups, and reliable scalability. In the experiment, the researchers used Methyltriphenylphosphonium bromide(cas: 1779-49-3Recommanded Product: 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.Recommanded Product: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Chemical Science included an article by Nguyen, Julia; Chong, Andrea; Lalic, Gojko. SDS of cas: 1779-49-3. The article was titled 《Nickel-catalyzed anti-Markovnikov hydroarylation of alkenes》. The information in the text is summarized as follows:

We have developed a nickel-catalyzed hydroarylation of alkenes using aryl halides as coupling partners. Excellent anti-Markovnikov selectivity is achieved with aryl-substituted alkenes and enol ethers. We also show that hydroarylation occurs with alkyl substituted alkenes to yield linear products. Preliminary examination of the reaction mechanism suggests irreversible hydrometallation as the selectivity determining step of the hydroarylation. After reading the article, we found that the author used Methyltriphenylphosphonium bromide(cas: 1779-49-3SDS of cas: 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. SDS of cas: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2018,Zhang, Qichao; Lv, Jian; Li, Sujia; Luo, Sanzhong published 《Carbocation Lewis Acid Catalyzed Diels-Alder Reactions of Anthracene Derivatives》.Organic Letters published the findings.Application of 13465-09-3 The information in the text is summarized as follows:

The carbocation salt [Ph3C][BArF] has been identified as a viable Lewis acid catalyst for the Diels-Alder reactions between anthracene derivatives and unsaturated carbonyl compounds with good selectivity and high efficiency. After reading the article, we found that the author used 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

HPLC of Formula: 1530-32-1In 2022 ,《Contra-thermodynamic Olefin Isomerization by Chain-Walking Hydroboration and Dehydroboration》 was published in Organic Letters. The article was written by Hanna, Steven; Bloomer, Brandon; Ciccia, Nicodemo R.; Butcher, Trevor W.; Conk, Richard J.; Hartwig, John F.. The article contains the following contents:

Dehydroboration is coupled with chain-walking hydroboration to create a one-pot, contra-thermodn., short- or long-range isomerization of internal olefins to terminal olefins. This dehydroboration occurs by a sequence comprising activation with a nucleophile, iodination, and base-promoted elimination. The isomerization proceeds at room temperature without the need for a fluoride base, and the substrate scope of this isomerization is expanded over those of previous isomerizations authors have reported with silanes. In the experiment, the researchers used many compounds, for example, 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. CatOnium ETPB is also used as catalysts in the synthesis of certain organic compounds.HPLC of Formula: 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Iwamoto, Hiroaki; Tsuruta, Takuya; Ogoshi, Sensuke published their research in ACS Catalysis in 2021. The article was titled 《Development and Mechanistic Studies of (E)-Selective Isomerization/Tandem Hydroarylation Reactions of Alkenes with a Nickel(0)/Phosphine Catalyst》.Recommanded Product: Ethyltriphenylphosphonium bromide The article contains the following contents:

A stereoselective alkene isomerization and sequential hydroarylation with arylboronic acid using a nickel(0) catalyst was developed. The bulky monophosphine PAd2(n-Bu) was an effective ligand in these reactions to furnish both various stereo-defined internal alkenes and hydroarylation products (isomerization: up to 98%, E/Z = 98:2; tandem hydroarylation: up to 82%). Mechanistic studies based on experiments and computational calculations suggested that the isomerization proceeds via an intra- or intermol. hydrogen shift. Furthermore, a concerted multibond recombination with boronic acid-assisted oxidative protometallation of the alkene were found to be a reasonable mechanism for the formation of the alkylnickel(II) species from the alkene, nickel(0), alc., and boronic acid in the hydroarylation. After reading the article, we found that the author used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Recommanded Product: 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.Recommanded Product: Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Singlet oxygen stimulus for switchable functional organic cages》 was published in Chemical Science in 2020. These research results belong to Mongin, Cedric; Ardoy, Alejandro Mendez; Mereau, Raphael; Bassani, Dario M.; Bibal, Brigitte. Application In Synthesis of 9,10-Dibromoanthracene The article mentions the following:

Mol. cages 1a and 2a incorporating a 9,10-diphenylanthracene (DPA) chromophore were synthesized through a templated ring-closure metathesis approach that allows variation in cavity size through the introduction of up to three different pillars. Reversible Diels-Alder reaction between the DPA moiety and photogenerated singlet oxygen smoothly converted 1a and 2a to the corresponding endoperoxide cages 1b and 2b, which are converted back to 1a and 2a upon heating. Endoperoxide formation constitutes a reversible covalent signal that combines structural changes in the interior of the cage with introduction of two addnl. coordination sites. This results in a large modulation of the binding ability of the receptors attributed to a change in the location of the preferred binding site owing to the added coordination by the endoperoxide oxygen lone pairs. Cages 1a and 2a form complexes with sodium and cesium whose association constants are modified by 4-20 fold for Na+ and 200-450 fold for Cs+ upon conversion to 1b and 2b. DFT calculations show that in the anthracene form, cages 1a and 2a can bind 2 metal cations in their periphery so that each cation is coordinated by 4 oxygens and one amine nitrogen, whereas the endoperoxide cages 1b and 2b bind cations centrally in a geometry that favors coordination to the endoperoxide oxygens.9,10-Dibromoanthracene(cas: 523-27-3Application In Synthesis of 9,10-Dibromoanthracene) was used in this study.

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%.Application In Synthesis of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Ligand Steric Effects of α-Diimine Nickel(II) and Palladium(II) Complexes in the Suzuki-Miyaura Cross-Coupling Reaction》 was published in ACS Omega in 2020. These research results belong to Talukder, Muktadir Md; Cue, John Michael O.; Miller, Justin T.; Gamage, Prabhath L.; Aslam, Amina; McCandless, Gregory T.; Biewer, Michael C.; Stefan, Mihaela C.. Product Details of 523-27-3 The article mentions the following:

A family of mono- and dinuclear Ni(II) and Pd(II) complexes I, II, III and IV with a diverse and versatile α-diimine ligand environment for Suzuki-Miyaura cross-coupling (SMC) reactions was examined To evaluate the ligand steric effects, including the bite angle in the reaction outcomes, the structural variation of the complexes I, II, III and IV was achieved by incorporating iminopyridine- and acenaphthene-based ligands. Moreover, the impact of substrate bulkiness was investigated by reacting various aryl bromides RBr (R = Ph, 1H-indol-5-yl, 4-bromo-2,3,5,6-tetrafluorophenyl, etc.) with phenylboronic acid, 2-naphthylboronic acid, and 9-phenanthracenylboronic acid. Yields were the best with the dinuclear complex, being nearly quant. (93-99%), followed by the mononuclear complexes I and IV, giving yields of 78-98%. Consequently, α-diimine-based ligands V and VI have the potential to deliver Ni-based systems I and II as sustainable catalysts in SMC. In the experiment, the researchers used 9,10-Dibromoanthracene(cas: 523-27-3Product Details of 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.Product Details of 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Funneling aromatic products of chemically depolymerized lignin into 2-pyrone-4-6-dicarboxylic acid with Novosphingobium aromaticivorans》 were Perez, Jose M.; Kontur, Wayne S.; Alherech, Manar; Coplien, Jason; Karlen, Steven D.; Stahl, Shannon S.; Donohue, Timothy J.; Noguera, Daniel R.. And the article was published in Green Chemistry in 2019. Electric Literature of C20H20BrP The author mentioned the following in the article:

Lignin is an aromatic heteropolymer found in plant biomass. Depolymerization of lignin, either through biol. or chem. means, invariably produces heterogenous mixtures of low mol. weight aromatic compounds Microbes that can metabolize lignin-derived aromatics have evolved pathways that funnel these heterogeneous mixtures into a few common intermediates before opening the aromatic ring. In this work, we engineered Novosphingobium aromaticivorans DSM12444, via targeted gene deletions, to use its native funneling pathways to simultaneously convert plant-derived aromatic compounds containing syringyl (S), guaiacyl (G), and p-hydroxyphenyl (H) aromatic units into 2-pyrone-4,6-dicarboxylic acid (PDC), a potential polyester precursor. In batch cultures containing defined media, the engineered strain converted several of these depolymerization products, including S-diketone and G-diketone (non-natural compounds specifically produced by chem. depolymerization), into PDC with yields ranging from 22% to 100%. In batch cultures containing a heterogeneous mixture of aromatic monomers derived from chem. depolymerization of poplar lignin, 59% of the measured aromatic compounds were converted to PDC. Overall, our results show that N. aromaticivorans has ideal characteristics for its use as a microbial platform for funneling heterogeneous mixtures of lignin depolymerization products into PDC or other commodity chems. The experimental part of the paper was very detailed, including the reaction process of Ethyltriphenylphosphonium bromide(cas: 1530-32-1Electric Literature of C20H20BrP)

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.Electric Literature of C20H20BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary