Category: 1779-49-3

The author of 《Investigation of the features in living anionic polymerization with styrene derivatives containing annular substituents》 were Bai, Hongyuan; Zhang, Zhi; Ma, Hongwei; Han, Li; Mu, Xiaochun; Huang, Wei; Liu, Pibo; Wu, Yibo. And the article was published in Polymer Chemistry in 2019. Recommanded Product: 1779-49-3 The author mentioned the following in the article:

Five styrene derivatives with annular substituents (SAs), called (1-cyclopentylvinyl)benzene (CPBE), (1-cyclohexylvinyl)benzene (CHBE), 1-methylene-1,2,3,4-tetrahydronaphthalene (THNE), 5-methylene-6,7,8,9-tetrahydro-5H-benzo[7]annulene (THBE) and 4-methylenethiochromane (META), were successfully synthesized and living anionic polymerization was conducted. Among these SAs, CPBE and CHBE possessed dissociative cycloparaffins as the α-substituent in the styrene structure, while THNE and THBE exhibited vinyl-substituted benzo-cycloalkanes. Addnl., the META monomer showed a similar structure to that of THNE, but with a sulfur atom in the benzo-cycloalkane. Due to the presence of bulky cyclic structures in these mols., similar non-homopolymerization characteristics, such as is the case of 1,1-diphenylethylene (DPE) derivatives, were discovered during living anionic polymerization (LAP). Thus, the living anionic copolymerization of these SAs with styrene (St) was performed to investigate their specific features. All of the copolymers exhibited narrow polydispersity, without any unexpected side-reaction over multiple variations in the reaction conditions. The investigations of their features in living anionic copolymerization of these five SAs showed that CPBE and CHBE were difficult to incorporate into chains, THNE and THBE exhibited relatively higher reactivity than the above two, while META presented the highest reactivity (rSt = 2.6) among the five SAs. Meanwhile, d. functional theor. (DFT) calculations were used to simulate the optimal structures of these SAs and to theor. understand the differences in their reactivity. Based on the actual results of the specific features of the SAs, it is possible to explore new monomers for further synthesis of sequence-controlled polymers using the living anionic polymerization strategy. Furthermore, this new insight into a monomer synthetic strategy can be expanded for subsequent sequence control and tailoring of the polymer properties. In the experimental materials used by the author, we found 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

《Nickel-catalyzed anti-Markovnikov hydroarylation of unactivated alkenes with unactivated arenes facilitated by non-covalent interactions》 was published in Nature Chemistry in 2020. These research results belong to Saper, Noam I.; Ohgi, Akito; Small, David W.; Semba, Kazuhiko; Nakao, Yoshiaki; Hartwig, John F.. Safety of Methyltriphenylphosphonium bromide The article mentions the following:

Abstract: Anti-Markovnikov additions to alkenes have been a longstanding goal of catalysis, and anti-Markovnikov addition of arenes to alkenes would produce alkylarenes that are distinct from those formed by acid-catalyzed processes. Existing hydroarylations are either directed or occur with low reactivity and low regioselectivity for the n-alkylarene. Herein, we report the first undirected hydroarylation of unactivated alkenes with unactivated arenes that occurs with high regioselectivity for the anti-Markovnikov product. The reaction occurs with a nickel catalyst ligated by a highly sterically hindered N-heterocyclic carbene. Catalytically relevant arene- and alkene-bound nickel complexes have been characterized, and the rate-limiting step was shown to be reductive elimination to form the C-C bond. D. functional theory calculations, combined with second-generation absolutely localized MO energy decomposition anal., suggest that the difference in activity between catalysts containing large and small carbenes results more from stabilizing intramol. non-covalent interactions in the secondary coordination sphere than from steric hindrance. The first undirected hydroarylation of unactivated alkenes RCH=CHR1 (R = C8H17, cyclohexyl, C(CH3)3, etc.; R1 = H, CH3, C2H5, C3H7) with unactivated arenes R2C6H5 (R2 = 3-CH3, 3,4-(CH3)2, 3,5-(CF3)2, etc.) occurs with high regioselectivity for the anti-Markovnikov product, e.g., I. The reaction occurs with a Ni catalyst ligated by a highly sterically hindered N-heterocyclic carbene (NHC). Catalytically relevant arene- and alkene-bound Ni complexes have been characterized, and the rate-limiting step was shown to be reductive elimination to form the C-C bond. DFT calculations, combined with energy decomposition anal. (EDA), suggest that the difference in activity between catalysts containing large and small carbenes results more from stabilizing intramol., non-covalent interactions in the secondary coordination sphere than from steric hindrance. In addition to this study using Methyltriphenylphosphonium bromide, there are many other studies that have used Methyltriphenylphosphonium bromide(cas: 1779-49-3Safety of Methyltriphenylphosphonium bromide) was used in this study.

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. Safety of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Visible-Light-Driven Nitrogen Radical-Catalyzed [3 + 2] Cyclization of Vinylcyclopropanes and N-Tosyl Vinylaziridines with Alkenes》 was published in Organic Letters in 2020. These research results belong to Zhao, Quan-Qing; Zhou, Xue-Song; Xu, Shuang-Hua; Wu, Ya-Li; Xiao, Wen-Jing; Chen, Jia-Rong. Formula: C19H18BrP The article mentions the following:

A visible light photoredox-promoted and nitrogen radical catalyzed [3 + 2] cyclization of vinylcyclopropanes and N-tosyl vinylaziridines with alkenes is developed. Key to the success of this process is the use of the readily tunable hydrazone as a nitrogen radical catalyst. Preliminary mechanism studies suggest that the photogenerated nitrogen radical undergoes reversible radical addition to the vinylcyclopropanes and N-tosyl vinylaziridines to enable their ring-opening C-C and C-N bond cleavage and ensuing cyclization with alkenes. In the experiment, the researchers used many compounds, for example, 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

HPLC of Formula: 1779-49-3In 2019 ,《A transition-metal-free & diazo-free styrene cyclopropanation》 was published in Chemical Science. The article was written by Herraiz, Ana G.; Suero, Marcos G.. The article contains the following contents:

Synthesis of wide range of substituted cyclopropanes, e.g., I, via operationally simple and broadly applicable novel cyclopropanation of styrenes using gem-diiodomethyl carbonyl reagents was developed. Visible-light triggered the photoinduced generation of iodomethyl carbonyl radicals, able to cyclopropanate a wide array of styrenes with excellent chemoselectivity and functional group tolerance. To highlight the utility of photocyclopropanation, demonstrated the late-stage functionalization of biomol. derivatives The results came from multiple reactions, including the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3HPLC of Formula: 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.HPLC of Formula: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Catalytic radical generation of π-allylpalladium complexes》 was published in Nature Catalysis in 2020. These research results belong to Huang, Huan-Ming; Koy, Maximilian; Serrano, Eloisa; Pflueger, Philipp Miro; Schwarz, J. Luca; Glorius, Frank. Application of 1779-49-3 The article mentions the following:

A radical approach for the generation of π-allylpalladium complexes by employing N-hydroxyphthalimide esters e.g., I as bifunctional reagents in combination with 1,3-dienes RCH=CHCH=CH2 (R = H, Me, 2-phenylethyl, cyclohexyl, etc.) and 1,3-cyclohexadiene was shown. Using this strategy, 1,4-aminoalkylation of dienes were reported. The remarkable scope and functional group tolerance of this redox-neutral and mild protocol were demonstrated across >60 examples e.g., II. The utility of this strategy was further demonstrated in radical cascade reactions and in the late-stage modification of drugs and natural products. The experimental process involved the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3Application of 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. Application of 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《A chiral uranyl-Kemp’s tricarboxylate cubic framework: structure-directing effect of counter ions with three-fold rotational symmetry》 was written by Thuery, Pierre; Harrowfield, Jack. Related Products of 1779-49-3This research focused onuranyl carboxylate coordination polymer preparation Hirshfeld surface; crystal structure uranyl carboxylate coordination polymer. The article conveys some information:

In the presence of PPh3Me+ cations, Kemp’s tricarboxylate (kta3-) complexes the uranyl cation to give [PPh3Me][UO2(kta)] (1), a triperiodic framework with cubic symmetry and srs topol. The PPh3Me+ cation is held by weak interactions into cavities with matching three-fold rotational symmetry. Comparison with the diperiodic hemi-hydrate polymorph previously reported points to the disrupting role of OH···O hydrogen bonds in the latter.Methyltriphenylphosphonium bromide(cas: 1779-49-3Related Products of 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.Related Products of 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Biobased Cycloolefin Polymers: Carvone-Derived Cyclic Conjugated Diene with Reactive exo-Methylene Group for Regioselective and Stereospecific Living Cationic Polymerization》 was published in ACS Macro Letters in 2020. These research results belong to Nishida, Takenori; Satoh, Kotaro; Nagano, Shusaku; Seki, Takahiro; Tamura, Masazumi; Li, Yingai; Tomishige, Keiichi; Kamigaito, Masami. Recommanded Product: 1779-49-3 The article mentions the following:

Carvone, a naturally abundant chiral cyclic α,β-unsaturated carbonyl compound, was chem. transformed into cyclic exo-methylene conjugated dienes. The exo-methylene group had high reactivity in cationic polymerization and was efficiently polymerized in a controlled manner via regioselective 1,4-conjugated additions using initiating systems effective for living cationic polymerization of vinyl ethers. The obtained polymers with 1,3-cyclohexenyl units and tetra-substituted olefins in the main chain showed high glass transition temperatures over 110°C. The chiral monomer underwent stereospecific polymerization to result in polymers with low solubility and weak packing of the rigid main chain in the lamellar layers. The racemic mixture resulted in soluble amorphous polymers, which were subsequently hydrogenated into cycloolefin polymers with enhanced thermal properties. The experimental part of the paper was very detailed, including the reaction process of Methyltriphenylphosphonium bromide(cas: 1779-49-3Recommanded Product: 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. Recommanded Product: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Meng, Shuai; Hettiarachchi, Ishani Lakshika; Bhetuwal, Bishwa Raj; Thapa, Prakash; Zhu, Jianglong published an article in Journal of Organic Chemistry. The title of the article was 《Stereoselective Synthesis of β-D-Manno-heptopyranoside via Cs2CO3-Mediated Anomeric O-Alkylation: Synthesis of a Tetrasaccharide Repeating Unit of Bacillus thermoaerophilus Surface-Layer Glycoprotein》.Formula: C19H18BrP The author mentioned the following in the article:

Stereoselective synthesis of D-glycero- and L-glycero-β-D-mannoheptosides has been achieved by cesium carbonate-mediated β-selective anomeric O-alkylation of the corresponding D-mannoheptoses. In addition, this method has been utilized in the total synthesis of a tetrasaccharide repeat unit of Bacillus thermoaerophilus surface-layer glycoprotein. The results came from multiple reactions, including the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3Formula: C19H18BrP)

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. Formula: C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Organic & Biomolecular Chemistry included an article by Sun, Wan; Chen, Chen; Qi, Yuan; Zhao, Jinghui; Bao, Yinwei; Zhu, Bolin. Recommanded Product: Methyltriphenylphosphonium bromide. The article was titled 《Palladium-catalyzed cascade reactions of alkene-tethered carbamoyl chlorides with N-tosyl hydrazones: synthesis of alkene-functionalized oxindoles》. The information in the text is summarized as follows:

A palladium-catalyzed cascade reaction of alkene-tethered carbamoyl chlorides 4-R-5-R1-6-R2-2-R3C(=CH2)C6HN(R4)C(O)Cl (R = H, CH3, t-Bu, OCH3, 4-F, 4-Cl, 4-NO2; R2 = H, CH3; R1R2 = -CH=CHCH=CH-; R3 = CH3, C6H5, 4-FC6H4, 4-ClC6H4, 2-FC6H4; R4 = benzyl, p-methoxybenzyl, cyclopentyl) with N-tosyl hydrazones R5HC=NNHTs (R5 = C6H5, naphthalen-1-yl, thiophen-2-yl, etc.) is described. It provided a new way to synthesize various alkene-functionalized oxindoles I bearing an all-carbon quaternary center. The olefin moieties could serve as versatile handles for further elaboration. This transformation was highly efficient and showed good functional group tolerance. After reading the article, we found that the author used Methyltriphenylphosphonium bromide(cas: 1779-49-3Recommanded Product: 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. Recommanded Product: Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,New Journal of Chemistry included an article by Kobra, Khadijatul; Li, Yuxuan; Sachdeva, Rakesh; McMillen, Colin D.; Pennington, William T.. Recommanded Product: Methyltriphenylphosphonium bromide. The article was titled 《New polymorphism and structural sensitivity in triphenylmethylphosphonium trihalide salts》. The information in the text is summarized as follows:

In the course of our ongoing study of halogen bonding in cocrystals of organoiodine mols. with triiodide salts, we have isolated three of the four known polymorphs of triphenylmethylphosphonium triiodide (PPh3MeI3) and found that one of the tetramorphs exhibits a low temperature phase transition not previously described in the literature. Variable temperature crystallog. studies coupled with differential scanning calorimetry were used to determine the transition temperature and solid-state single crystal to single crystal reversibility of the phase change. To monitor the effect of the size of the anion, bromine was introduced to the reaction mixtures to produce trihalide salts (PPh3MeX3) having varying degrees of mixed iodine and bromine content. The resulting modification of anion size led to structural perturbations beyond those previously observed for the PPh3MeI3 polymorphs, giving three different structure types with similar but not identical packing arrangements of the ions. In addition to providing insight into the effect of subtle changes to crystal packing, the mixed trihalides offer structural and electronic tuning to the applicability of rod-shaped trihalides and functional halogen bonding acceptors. In addition to this study using Methyltriphenylphosphonium bromide, there are many other studies that have used Methyltriphenylphosphonium bromide(cas: 1779-49-3Recommanded Product: 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.Recommanded Product: Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary