1779-49-3 Archives - Bromides-buliding-blocks

Han, Jie’s team published research in ACS Catalysis in 2019 | CAS: 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.Category: bromides-buliding-blocks

The author of 《Design and Synthesis of WJ-Phos, and Application in Cu-Catalyzed Enantioselective Boroacylation of 1,1-Disubstituted Allenes》 were Han, Jie; Zhou, Wei; Zhang, Pei-Chao; Wang, Huamin; Zhang, Ronghua; Wu, Hai-Hong; Zhang, Junliang. And the article was published in ACS Catalysis in 2019. Category: bromides-buliding-blocks The author mentioned the following in the article:

The highly enantioselective copper-catalyzed three-component boroacylation of 1,1-disubstituted allenes is reported by using a class of chiral ligands (WJ-Phos), delivering various functionalized organoboron compounds bearing an all-carbon stereocenter in moderate to good yields with high enantioselectivities. WJ-Phos is a ferrocene-derived chiral sulfinamide phosphine ligand and can be easily synthesized in gram-scale from readily available starting materials in short steps. The salient features of this reaction include moderate to good yields, high enantioselectivities, gram-scale synthesis, diverse synthetic transformations, and the development of a new chiral ligand. In the part of experimental materials, we found many familiar compounds, such as Methyltriphenylphosphonium bromide(cas: 1779-49-3Category: bromides-buliding-blocks)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhu, Yuqiong’s team published research in RSC Advances in 2019 | CAS: 1779-49-3

The author of 《Titanium complex with an [OSSO]-type bis(phenolate) ligand for ethylene copolymerization with vinyl polar monomer based on group protection》 were Zhu, Yuqiong; Li, Sihan; Liang, Huaqing; Xie, Xiuli; Zhu, Fangming. And the article was published in RSC Advances in 2019. Related Products of 1779-49-3 The author mentioned the following in the article:

The [OSSO]-type bis(phenolate) titanium complex 1 activated by methylaluminoxane (MAO) was tested as a homogeneous catalyst for ethylene coordination copolymerization with protected vinyl polar monomer of p-tert-butyl-dimethylsilyloxystyrene (p-TBDMSOS). The results showed that the active species were almost not poisonous to the catalyst by the protected vinyl polar monomer. Moreover, the composition and sequence length as well as sequence distribution in the copolymers were investigated by theor. calculation and 13C NMR characterization. Especially, the incorporation ratio of p-TBDMSOS into the polyethylene chain could be controlled by changing p-TBDMSOS concentration in the feed. Interestingly, an approx. alternating copolymer of poly(E-alt-(p-TBDMSOS)) could be formed when the p-TBDMSOS feed concentration increased to 1.0 mol L-1. Subsequently, the poly(ethylene-co-(p-hydroxystyrene)) (poly(E-co-(p-HOS))) could be prepared by a facile deprotection in terms of desilylation of tert-butyldimethylsilyl ether. The hydrophilicity of poly(E-co-(p-HOS)) films were investigated by water contact angle measurements. In the experimental materials used by the author, we found Methyltriphenylphosphonium bromide(cas: 1779-49-3Related Products of 1779-49-3)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Jiang, Yang’s team published research in ACS Catalysis in 2020 | CAS: 1779-49-3

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.Formula: C19H18BrP

Formula: C19H18BrPIn 2020 ,《Syndioselective 3,4-Polymerization of 1-Phenyl-1,3-Butadiene by Rare-Earth Metal Catalysts》 was published in ACS Catalysis. The article was written by Jiang, Yang; Kang, Xiaohui; Zhang, Zhen; Li, Shihui; Cui, Dongmei. The article contains the following contents:

Coordination polymerization of 1-phenyl-1,3-butadiene (1PB) was carried out by diiminophosphinato lutetium complexes 1 and 2, pyridyl-methylene-fluorenyl complexes 3 (Sc 3a; Lu 3b; Y 3c) and 4 (Sc 4a; Lu 4b; Y 4c), β-diiminato yttrium complex 5, bis(imino)aryl gadolinium complex 6, bis(phosphino)carbazolide yttrium complex 7 and bis(phosphinophenyl)amido complex 8. Complexes 1, 2, 3a,b and 4a,b, under the activation of [Ph3C][B(C6F5)4] and AliBu3, show high activities as well as higher than 96.6% 3,4-regio selectivities, of which 1 and 2 are non stereoselective to give atactic 3,4-poly(1PB), while 3a,b and 4a,b exhibit distinguished syndioselectivities (> 95.3% rrrr). However, 3c and 4c are inactive. In addition, complexes 5-7 are also completely inert although they are highly active and cis-1,4 selective for isoprene polymerization On contrary, the analogous cis-1,4 selective complex 8 exhibits syndio- (> 96.1% rrrr) and 3,4-regio (> 99%) selectivity. Hydrogenation of a syndiotactic 3,4-poly(1PB) affords a syndiotactic poly(4-phenyl-1-butene) elastomer with a Tg of 17°C. The cationic cyclization transfers a syndiotactic 3,4-poly(1PB) into a rigid cyclized polyolefin with a Tg as high as 327°C. DFT simulations are employed to illustrate the mechanisms for control of activity and stereo-selectivity from thermodn. and geometric viewpoints. The results came from multiple reactions, including the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3Formula: C19H18BrP)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Quannan’s team published research in ACS Catalysis in 2019 | 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. Quality Control of Methyltriphenylphosphonium bromide

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)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ju, Baihang’s team published research in Organic Letters in 2019 | CAS: 1779-49-3

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)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Quannan’s team published research in ACS Catalysis in 2019 | CAS: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ju, Baihang’s team published research in Organic Letters in 2019 | CAS: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hemric, Brett N.’s team published research in ACS Catalysis in 2019 | CAS: 1779-49-3

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)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Nguyen, Julia’s team published research in Chemical Science in 2019 | CAS: 1779-49-3

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)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Takagi, Koji’s team published research in Polymer Chemistry in 2019 | CAS: 1779-49-3

The author of 《Ladderization of polystyrene derivatives by palladium-catalyzed polymer direct arylation》 were Takagi, Koji; Tanaka, Hidetoshi; Mikami, Koichiro. And the article was published in Polymer Chemistry in 2019. SDS of cas: 1779-49-3 The author mentioned the following in the article:

Ladderization of polystyrene derivatives successfully proceeded by palladium-catalyzed polymer direct arylation in the presence of a phosphine ligand and pivalic acid using poly(2-bromostyrene) as a prepolymer, in which the polymer tacticity had little influence on the reaction efficiency. The reaction mechanism was supported by theor. calculation in detail. The optical and thermal properties of pseudo-ladderized polystyrene suggested enhanced chain rigidity. The experimental process involved the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3SDS of cas: 1779-49-3)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary