Category: 1779-49-3

The author of 《Novel Features of 9-Methylene-9H-thioxanthene (MTAE) in Living Anionic Polymerization》 were Chang, Shuang; Han, Li; Ma, Hongwei; Bai, Hongyuan; Li, Cun; Liu, Pibo; Yang, Lincan; Shen, Heyu; Li, Chao; Zhang, Songbo. And the article was published in Macromolecular Chemistry and Physics in 2019. COA of Formula: C19H18BrP The author mentioned the following in the article:

For this study, a new epithio-1,1-diphenylethylene (DPE) derivative, namely, 9-Methylene-9H-thioxanthene (MTAE), is synthesized, and its copolymerization reactions are investigated, showing distinctive features in living anionic copolymerization At room temperature and hydrocarbon solvents, MTAE cannot be copolymerized with styrene (St) but can be copolymerized with 1,4-divinylbenzene (DVB), forming a linear alternating copolymer. Based on this finding, ter-polymerization of MTAE, DVB and St is conducted to generate a special alternating structure. Addnl., MTAE is found to exhibit fairly high reactivity in copolymerization with Isoprene (Ip) under the same conditions. An alternating sequence of alt-MTAE/Ip containing high trans-geometric Ip content (76% of trans-1,4) and a di-block sequence of alt-MTAE/Ip-b-Ip are easily obtained. Its exptl. reactivity ratio with Ip is investigated via the in situ 1H NMR method (rIp = 0.28), and the corresponding kinetic behaviors and sequence structure are elucidated. Finally, the origin of the effect of MTAE on the isomerism of Ip during chain propagation is investigated by d. functional theory (DFT) calculations, and it is found that the bridge sulfur atom in MTAE interacts strongly with living species. This special finding provides a novel approach for the sequence regulation, precise functionalization, and stereo-structure control in living anionic polymerization originating from monomer structure design. The experimental process involved the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3COA of Formula: C19H18BrP)

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.COA of Formula: C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Sequential Cross-Coupling/Annulation of ortho-Vinyl Bromobenzenes with Aromatic Bromides for the Synthesis of Polycyclic Aromatic Compounds》 were Wei, Dong; Li, Meng-Yao; Zhu, Bin-Bin; Yang, Xiao-Di; Zhang, Fang; Feng, Chen-Guo; Lin, Guo-Qiang. And the article was published in Angewandte Chemie, International Edition in 2019. Electric Literature of C19H18BrP The author mentioned the following in the article:

A sequential cross-coupling/annulation of ortho-vinyl bromobenzenes with aromatic bromides was realized, providing a direct and modular approach to access polycyclic aromatic compounds A vinyl-coordinated palladacycle was proposed as the key intermediate for this sequential process. Excellent chemoselectivity and regioselectivity were observed in this transformation. The practicability of this method is highlighted by its broad substrate scope, excellent functional group tolerance, and rich transformations associated with the obtained products. In addition to this study using Methyltriphenylphosphonium bromide, there are many other studies that have used Methyltriphenylphosphonium bromide(cas: 1779-49-3Electric Literature of C19H18BrP) 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.Electric Literature of C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Physical properties of ethylene glycol-based deep eutectic solvents》 were Ibrahim, Rusul Khaleel; Hayyan, Maan; AlSaadi, Mohammed Abdulhakim; Ibrahim, Shaliza; Hayyan, Adeeb; Hashim, Mohd Ali. And the article was published in Journal of Molecular Liquids in 2019. Quality Control of Methyltriphenylphosphonium bromide The author mentioned the following in the article:

Deep eutectic solvents (DESs) have been widely recognized as ionic liquids (ILs) analogs due to their low production cost and superior favorable properties over conventional ILs. Studying the phys. properties of these solvents will contribute to design processes involving DESs. In this study, five DESs have been successfully prepared using ethylene glycol (EG) as hydrogen bond donor (HBD) with N,N-diethylethanolammonium chloride (DAC), benzyltriphenylphosphonium chloride (BTPC), choline chloride (ChCl), methyltriphenylphosphonium bromide (MTPB) and tetra-n-butylammonium bromide (TBAB) as salts. The f.p. of each of the five studied DESs was measured using Differential Scanning Calorimetry (DSC) and the DES functional groups were identified using the Fourier transform IR (FTIR) spectroscopy. Moreover, the viscosity, d., elec. conductivity and surface tension were measured at a temperature range of 293.15-353.15 K and they were highly affected by the variation of the temperature It is worth mentioning that the studied DESs showed many phys. characteristics similar to that of ILs, which boost their possibilities to be employed in interdisciplinary domains.Methyltriphenylphosphonium bromide(cas: 1779-49-3Quality Control of Methyltriphenylphosphonium bromide) was used in this study.

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.Quality Control of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Enantioselective Cross-Exchange between C-I and C-C σ Bonds》 were Sun, Yu-Li; Wang, Xing-Ben; Sun, Feng-Na; Chen, Qian-Qian; Cao, Jian; Xu, Zheng; Xu, Li-Wen. And the article was published in Angewandte Chemie, International Edition in 2019. Computed Properties of C19H18BrP The author mentioned the following in the article:

A palladium-catalyzed enantioselective intramol. σ-bond cross-exchange between C-I and C-C bonds is realized, providing chiral indanones bearing an alkyl iodide group and an all-carbon quaternary stereocenter, e.g., I. Pd/TADDOL-derived phosphoramidite is found to be an efficient catalytic system for both C-C bond cleavage and alkyl iodide reductive elimination. In addition to aryl iodides, aryl bromides can also be used for this transformation in the presence of KI. D.-functional theory (DFT) calculation studies support the ring-opening of cyclobutanones, e.g., II, occurring through an oxidative addition/reductive elimination process involving PdIV species. In the experiment, the researchers used many compounds, for example, Methyltriphenylphosphonium bromide(cas: 1779-49-3Computed Properties of C19H18BrP)

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.Computed Properties of C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Low Dielectric Polymers with High Thermostability Derived from Biobased Vanillin》 was published in ACS Sustainable Chemistry & Engineering in 2020. These research results belong to Dai, Menglu; Tao, Yangqing; Fang, Linxuan; Wang, Caiyun; Sun, Jing; Fang, Qiang. Application of 1779-49-3 The article mentions the following:

Vanillin has recently been prepared on a large scale from lignin, which becomes the second largest renewable resource. Because it has a naturally aromatic ring and an easily modified functional group, vanillin is considered as one of the ideal feedstocks for the synthesis of high-performance polymers. Based on this, there are a few investigations on low dielec. polymers derived from vanillin, and we have designed and synthesized a monomer containing crosslinkable vinyl and benzocyclobutene units starting from vanillin. This monomer can be easily thermally polymerized into a crosslinked network, which displays good thermostability with a 5% weight loss temperature (T5d) of up to 436°C and a coefficient of thermal expansion (CTE) of 60.9 ppm/°C. Moreover, no obvious glass-transition temperature (Tg) of the crosslinked network is observed from room temperature to 400°C during the dynamic mech. anal. (DMA). In addition, the DMA test indicates that the crosslinked network exhibits good mech. properties with a storage modulus of up to 3.89 GPa at room temperature Furthermore, the crosslinked network displays good dielec. properties with a dielec. constant (Dk) of less than 2.84 and a dissipation factor (Df) of below 4.9 × 10-3 for frequencies ranging from 0.15 to 20 MHz. At a high frequency of 5 GHz, the crosslinked network exhibits a Dk of 2.81 and a Df of 6.79 × 10-3, resp. When the crosslinked polymer is immersed in water at room temperature for 96 h, it shows a low water uptake of 0.44%. These results indicate that the new biobased thermosetting resin has potential applications as a matrix resin or an encapsulation material in the microelectronic industry. Heating a new functional monomer (BCB-V) derived from vanillin gave a crosslinked network, displaying good hydrophobicity, film uniformity, thermostability, and dielec. properties at a high frequency of 5 GHz. In the experiment, the researchers used Methyltriphenylphosphonium bromide(cas: 1779-49-3Application 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.Application of 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yu, You-Jie; Zhang, Feng-Lian; Peng, Tian-Yu; Wang, Chang-Ling; Cheng, Jie; Chen, Chen; Houk, Kendall N.; Wang, Yi-Feng published their research in Science (Washington, DC, United States) in 2021. The article was titled 《Sequential C-F bond functionalizations of trifluoroacetamides and acetates via spin-center shifts》.Electric Literature of C19H18BrP The article contains the following contents:

Defluorinative functionalization of readily accessible trifluoromethyl groups constitutes an economical route to partially fluorinated mols. However, the controllable replacement of one or two fluorine atoms while maintaining high chemoselectivity remains a formidable challenge. Here we describe a general strategy for sequential carbon-fluorine (C-F) bond functionalizations of trifluoroacetamides and trifluoroacetates. The reaction begins with the activation of a carbonyl oxygen atom by a 4-dimethylaminopyridine-boryl radical, followed by a spin-center shift to trigger the C-F bond scission. A chemoselectivity-controllable two-stage process enables sequential generation of difluoro- and monofluoroalkyl radicals, which are selectively functionalized with different radical traps to afford diverse fluorinated products. The reaction mechanism and the origin of chemoselectivity were established by exptl. and computational approaches. After reading the article, we found that the author used Methyltriphenylphosphonium bromide(cas: 1779-49-3Electric Literature of 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.Electric Literature of C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Guo, Weisi; Wang, Qian; Zhu, Jieping published an article in 2021. The article was titled 《Selective 1,2-Aminoisothiocyanation of 1,3-Dienes Under Visible-Light Photoredox Catalysis》, and you may find the article in Angewandte Chemie, International Edition.HPLC of Formula: 1779-49-3 The information in the text is summarized as follows:

Selective three-component 1,2-diamination of 1,3-dienes with concurrent introduction of two orthogonally protected amino groups remains unknown despite its significant synthetic potential. We report herein that reaction of conjugated dienes such as (E)-PhCH:CHCH:CH2 with N-aminopyridinium salts such as I·BF4- (Ts = 4-MeC6H4SO2) and TMSNCS affords 1,2-aminoisothiocyanation products such as II in a highly chemo- and regio-selective manner under mild photoredox catalytic conditions. Mechanistic studies indicate that the facile isomerization of allyl thiocyanates to allyl isothiocyanates under photocatalytic conditions is responsible for the selective formation of the observed products. The mild isomerization protocol is expected to find applications in the synthesis of allyl isothiocyanates in a broad sense. In the part of experimental materials, we found many familiar compounds, such as Methyltriphenylphosphonium bromide(cas: 1779-49-3HPLC of Formula: 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.HPLC of Formula: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Biocidal polymers: synthesis, characterization and antimicrobial activity of bis-quaternary onium salts of poly(aspartate-co-succinimide)》 was written by El-Newehy, Mohamed H.; Meera, Moydeen A.; Aldalbahi, Ali K.; Thamer, Badr M.; Mahmoud, Yehia A.-G.; El-Hamshary, Hany. Quality Control of Methyltriphenylphosphonium bromideThis research focused onwater soluble biocidal polymer antimicrobial activity thermal stability; antimicrobial activity; poly(aspartate-co-succinimide); quaternary salts; water-soluble polymers. The article conveys some information:

Microbial multidrug resistance presents a real problem to human health. Therefore, water-soluble polymers based on poly(aspartate-co-succinimide) were synthesized via reaction of poly(aspartate-co-succinimide) with bis-quaternary ammonium or quaternary salts. The resultant copolymers were characterized by various techniques such as FTIR, TGA, 1HNMR, 13CNMR and elemental microanal. Antimicrobial activities of the new onium salts were investigated against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Salmonella typhi, and the fungi; Candida albicans, Aspergillus niger, Cryptococcus neoformans and Aspergillus flavus by agar diffusion method. Antimicrobial activity was studied in terms of inhibition zone diameters, in addition to the estimation of minimal inhibitory concentration (MIC) of the prepared compounds A. niger and E. coli were the most affected microorganisms among the tested microorganisms with an inhibition zone of 19-21 (mm) in case of biocides, (V) and (VII). The obtained results showed that the quaternary onium salts have higher activity compared to the aspartate copolymer with MIC concentrations of 25 mg/mL for (VII) and (V) and 50 mg/mL for (VI) and (IV). The results came from multiple reactions, including the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3Quality Control of Methyltriphenylphosphonium bromide)

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.Quality Control of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kumar, Nikhil; Banerjee, Tamal published their research in Journal of Chemical & Engineering Data in 2021. The article was titled 《Dearomatization Insights with Phosphonium-Based Deep Eutectic Solvent: Liquid-Liquid Equilibria Experiments and Predictions》.Computed Properties of C19H18BrP The article contains the following contents:

In a challenge to develop a process that meets the criteria of being “”green”” in the extraction of aromatics, deep eutectic solvents (DESs) are currently gaining importance as separation media. This work reports a phosphonium-based DES for the dearomatization of model diesel components at 25°C and p = 1 bar. The DES comprising a hydrogen bond acceptor, namely, methyltriphenylphosphonium bromide, along with ethylene glycol as a hydrogen bond donor, was formulated with a molar ratio of 1:4. The DES was then used to extract benzene from representative diesel fuel components, a mixture of n-decane, n-dodecane, and n-hexadecane. Ternary liquid-liquid equilibrium experiments were then performed at ambient conditions with different benzene concentrations with the feed varying from 2 to 20 wt %. An absence of the solvent in the raffinate phase was found in all the tie lines, suggesting limited solvent recovery costs. Besides, it was also found that all three ternary systems show type I phase activity with pos. slopes, indicating that the desired removal of benzene requires a small amount of solvent. The quantum chem.-based COSMO-SAC model was then used to predict the tie lines giving an average root mean square deviation value of 1.2%. The mechanism of the extraction process was also extensively studied with the help of quant. 1H NMR and Fourier transform IR spectroscopy. Higher benzene extraction efficiencies were observed due to the strong noncovalent interaction between the DES and benzene. In the experiment, the researchers used many compounds, for example, Methyltriphenylphosphonium bromide(cas: 1779-49-3Computed Properties of 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.Computed Properties of C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《A Concise Total Synthesis of (+)-Waihoensene Guided by Quaternary Center Analysis》 was written by Peng, Cheng; Arya, Piyush; Zhou, Zhiyao; Snyder, Scott A.. Application of 1779-49-3This research focused onwaihoensene total synthesis Conia ene cyclization Pauson Khand; Conia-ene; Pauson-Khand; total synthesis; triquinanes; waihoensene. The article conveys some information:

The four contiguous all-carbon quaternary centers of waihoensene (I), coupled with the absence of any traditional reactive functional groups other than a single alkene, render it a particularly challenging synthetic target among angular triquinane natural products. Here, we show that its polycyclic frame can be assembled concisely by using a strategically chosen quaternary center to guide the formation of the other three through judiciously selected C-C bond formation reactions. Those events, which included a unique Conia-ene cyclization and a challenging Pauson-Khand reaction, afforded a 17-step synthesis of the mol. in enantioenriched form. In the experimental materials used by the author, we found Methyltriphenylphosphonium bromide(cas: 1779-49-3Application of 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.Application of 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary