14516-54-2 Archives - Page 2 of 7 - Bromides-buliding-blocks

Khaled, Rabaa M.’s team published research in Polyhedron in 2022 | CAS: 14516-54-2

Bromopentacarbonylmanganese(I)(cas: 14516-54-2) has many other uses. It is used in the formation of (eta6-arene)tricarbonylmanganese(I) by reacting with arene (arene= hexamethyl benzene, 1,2,4,5-tetramethyl benzene, mesitylene, p-xylene and toluene) in the presence silver salt.Recommanded Product: 14516-54-2

In 2022,Khaled, Rabaa M.; Habashy, Danira A.; Ahmed, Amr Y.; Ismael, Omneya S.; Ibrahim, Sara S.; Abdelfatah, Mennattallah; Radacki, Krzysztof; Mansour, Ahmed M. published an article in Polyhedron. The title of the article was 《Photoactivatable properties of water-soluble fac-Mn(CO)3 bearing N-O bidentate pyridine ligands》.Recommanded Product: 14516-54-2 The author mentioned the following in the article:

Two water-soluble fac-Mn(CO)3 based complexes of the general formula fac-[MnBr(CO)3(N-O)] (1, 2; N-O = pyridine-2-carboxaldehyde, 2-acetylpyridine) were described for their potential CO releasing properties upon illumination at 468 nm, solvatochromism features and cytotoxicity against different malignant cell lines in both the dark and upon the exposure to light source. Neg. solvatochromism may be responsible for the red shift of the metal-to-ligand charge transfer band in increasingly less polar solvents. Compound 2, which had been functionalized with 2-acetylpyridine, released CO in water faster than complex 1, suggesting the role of the Me group in regulating the CO release kinetics. According to myoglobin assay, the CO release pathway in water is slower than in DMSO revealing to the role of the solvent in controlling the CO release kinetics of Mn(I) carbon monoxide releasing mols. The experimental part of the paper was very detailed, including the reaction process of Bromopentacarbonylmanganese(I)(cas: 14516-54-2Recommanded Product: 14516-54-2)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ganguli, Kasturi’s team published research in Tetrahedron in 2020 | CAS: 14516-54-2

《Benzimidazole fragment containing Mn-complex catalyzed hydrosilylation of ketones and nitriles》 was published in Tetrahedron in 2020. These research results belong to Ganguli, Kasturi; Mandal, Adarsha; Sarkar, Bidisha; Kundu, Sabuj. Safety of Bromopentacarbonylmanganese(I) The article mentions the following:

The synthesis of a new bidentate (NN)-Mn(I) complex is reported and its catalytic activity towards the reduction of ketones and nitriles is studied. On comparing the reactivity of various other Mn(I) complexes supported by benzimidazole ligand, it was observed that the Mn(I) complexes bearing 6-methylpyridine and benzimidazole fragments exhibited the highest catalytic activity towards monohydrosilylation of ketones and dihydrosilylation of nitriles. Using this protocol, a wide range of ketones were selectively reduced to the corresponding silyl ethers. In case of unsaturated ketones, the chemoselective reduction of carbonyl group over olefinic bonds was observed Addnl., selective dihydrosilylation of several nitriles were also achieved using this complex. Mechanistic investigations with radical scavengers suggested the involvement of radical species during the catalytic reaction. Stoichiometric reaction of the Mn(I) complex with phenylsilane revealed the formation of a new Mn(I) complex. In the experiment, the researchers used many compounds, for example, Bromopentacarbonylmanganese(I)(cas: 14516-54-2Safety of Bromopentacarbonylmanganese(I))

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Lense, Sheri’s team published research in Organometallics in 2020 | CAS: 14516-54-2

《Effects of Tuning Intramolecular Proton Acidity on CO2 Reduction by Mn Bipyridyl Species》 was written by Lense, Sheri; Grice, Kyle A.; Gillette, Kara; Wolf, Lucienna M.; Robertson, Grace; McKeon, Dylan; Saucedo, Cesar; Carroll, Patrick J.; Gau, Michael. COA of Formula: C5BrMnO5 And the article was included in Organometallics in 2020. The article conveys some information:

To understand the effect of intramol. proton acidity on CO2 reduction by Mn-bipyridyl species, three fac-Mn(CO)3 bipyridine complexes containing intramol. phenol groups of varying acidity were synthesized and electrochem., spectroscopic, and computational studies were performed. While the phenol group acidity has minimal influence on the metal center, the complex containing a fluoro-substituted (more acidic) phenol, MnBr(F-HOPh-bpy)(CO)3, exhibits a decreased catalytic to peak current ratio following the 2nd reduction compared to the complexes with unsubstituted or Me-substituted phenol groups (MnBr(HOPh-bpy)(CO)3 and MnBr(Me-HOPh-bpy)(CO)3, resp.). A 2nd process is also present in the catalytic wave for MnBr(F-HOPh-bpy)(CO)3. Also, MnBr(F-HOPh-bpy)(CO)3 exhibits decreased CO2 production and increased H2 production compared to MnBr(HOPh-bpy)(CO)3. Spectroelectrochem. under an inert atm. in the presence of H2O shows that following the 1st reduction, for both MnBr(F-HOPh-bpy)(CO)3 and MnBr(HOPh-bpy)(CO)3 the major product is a phenoxide-coordinated fac-(CO)3 species formed from reductive deprotonation and the minor product is a 6-coordinate Mn(I)-hydride. For both species, the major species following the 2nd reduction is the 5-coordinate anion believed to be the active catalyst for CO2 reduction, but the Mn(I) hydride persists as a minor species. The IR assignments are supported by theor. calculations Changes to the acidity of an intramol. substituent can have significant effects on catalytic performance and product selectivity of Mn(CO)3 bipyridine catalysts despite having minimal effect on the metal center, with a more acidic intramol. substituent increasing H2 production at the expense of CO2 reduction After reading the article, we found that the author used Bromopentacarbonylmanganese(I)(cas: 14516-54-2COA of Formula: C5BrMnO5)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Ze’s team published research in Tetrahedron Letters in 2021 | CAS: 14516-54-2

Wang, Ze; Zhao, Xianghua; Huang, An; Yang, Zehui; Cheng, Yuqi; Chen, Jiachen; Ling, Fei; Zhong, Weihui published their research in Tetrahedron Letters in 2021. The article was titled 《Manganese catalyzed enantio- and regioselective hydrogenation of α,β-unsaturated ketones using an imidazole-based chiral PNN tridentate ligand》.HPLC of Formula: 14516-54-2 The article contains the following contents:

The enantioselective 1,2-reduction of α,β-unsaturated ketones has been achieved using a chiral pincer Mn catalyst. A series of PNN tridentate ligands containing benzimidazole groups were designed with ferrocene as the backbone, which coordinated with Mn to form the active catalyst. This mild process represents a general method to access chiral allyl alcs. with high catalytic activity (up to 9500 TON) and high enantioselectivity (66-86% ee). Furthermore, this catalytic system provides a novel synthesis of key pharmaceutical intermediates of cannabidiol. In the experiment, the researchers used Bromopentacarbonylmanganese(I)(cas: 14516-54-2HPLC of Formula: 14516-54-2)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Jiajia’s team published research in ACS Macro Letters in 2021 | CAS: 14516-54-2

Li, Jiajia; Kerr, Andrew; Song, Qiao; Yang, Jie; Hakkinen, Satu; Pan, Xiangqiang; Zhang, Zhengbiao; Zhu, Jian; Perrier, Sebastien published an article in 2021. The article was titled 《Manganese-Catalyzed Batch and Continuous Flow Cationic RAFT Polymerization Induced by Visible Light》, and you may find the article in ACS Macro Letters.Recommanded Product: 14516-54-2 The information in the text is summarized as follows:

We present a robust manganese-catalyzed cationic reversible addition-fragmentation chain transfer (RAFT) polymerization induced by visible light. Well-defined poly(vinyl ether)s with controlled mol. weight and mol. weight distributions (MWDs) can be conveniently prepared at room temperature without monomer purification The com. available manganese carbonyl bromide is used as the photocatalyst for cationic RAFT polymerization Moreover, this method has been further applied in both batch and continuous flow systems, providing a visible light induced flow cationic polymerization under mild conditions. The experimental process involved the reaction of Bromopentacarbonylmanganese(I)(cas: 14516-54-2Recommanded Product: 14516-54-2)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gausas, Laurynas’s team published research in ChemSusChem in 2022 | CAS: 14516-54-2

In 2022,Gausas, Laurynas; Donslund, Bjarke S.; Kristensen, Steffan K.; Skrydstrup, Troels published an article in ChemSusChem. The title of the article was 《Evaluation of Manganese Catalysts for the Hydrogenative Deconstruction of Commercial and End-of-Life Polyurethane Samples》.Application In Synthesis of Bromopentacarbonylmanganese(I) The author mentioned the following in the article:

Polyurethane (PU) is a thermoset plastic that is found in everyday objects, such as mattresses and shoes, but also in more sophisticated materials, including windmills and airplanes, and as insulation materials in refrigerators and buildings. Because of extensive inter-cross linkages in PU, current recycling methods are somewhat lacking. In this work, the effective catalytic hydrogenation of PU materials is carried out by applying a catalyst based on the earth-abundant metal manganese, to give amine and polyol fractions, which represent the original monomeric composition In particular, Mn-PhMACHO is found to catalytically deconstruct flexible foam, molded foams, insulation, and end-of-life materials at 1 weight% catalyst loading by applying a reaction temperature of 180°C, 50 bar of H2, and 0.9 weight% of KOH in iso-Pr alc. The protocol is showcased in the catalytic deconstruction of 2 g of mattress foam using only 0.13 weight% catalyst, resulting in 90% weight recovery and a turnover number of 905.Bromopentacarbonylmanganese(I)(cas: 14516-54-2Application In Synthesis of Bromopentacarbonylmanganese(I)) was used in this study.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Cembellin, Sara’s team published research in ACS Catalysis in 2020 | CAS: 14516-54-2

《Highly Selective and Atom Economical Synthesis of 1,3-Enynes, Pyrroles and Furans by Manganese(I)-Catalyzed C-H Activation》 was published in ACS Catalysis in 2020. These research results belong to Cembellin, Sara; Dalton, Toryn; Pinkert, Tobias; Schaefers, Felix; Glorius, Frank. HPLC of Formula: 14516-54-2 The article mentions the following:

A highly selective Mn(I)-catalyzed alkenylation of arenes and heteroarenes with 1,3-diynes is described. The reported transformation overcomes regio-, chemo- and stereoselectivity challenges associated with the use of these coupling partners. Both sym. and unsym. diynes can be applied in this protocol, affording single isomers not only in the synthesis of 1,3-enynes I but also in the one-step preparation of pyrroles and furans. This simple and highly atom economical strategy features wide functional group tolerance, good reproducibility and preparative scale utility. The manganese catalyst plays a crucial role in this C-H activation protocol, enabling high selectivity with previously challenging internal alkynes. Furthermore, the synthetic value of the method is highlighted by diverse post-functionalizations of the final products. The experimental process involved the reaction of Bromopentacarbonylmanganese(I)(cas: 14516-54-2HPLC of Formula: 14516-54-2)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sarkar, Koushik’s team published research in ACS Catalysis in 2021 | CAS: 14516-54-2

Sarkar, Koushik; Das, Kuhali; Kundu, Abhishek; Adhikari, Debashis; Maji, Biplab published their research in ACS Catalysis in 2021. The article was titled 《Phosphine-Free Manganese Catalyst Enables Selective Transfer Hydrogenation of Nitriles to Primary and Secondary Amines Using Ammonia-Borane》.Formula: C5BrMnO5 The article contains the following contents:

The synthesis of primary amines RCH2NH2HCl [R = Ph, 2-phenylethyl, (1-oxo-1,3-dihydro-2-benzofuran-5-yl)methyl, etc.], 2,2′-(1,4-phenylene)bis(ethan-1-aminium) chloride, hexane-1,6-diaminium chloride sym. and unsym. secondary amines RCH2NHCH2R and RCH2NHR1 (R1 = pyridin-2-ylmethyl, cyclohexyl, n-Bu, etc.) by hydrogenation of nitriles RCN, 1,4-benzenediacetonitrile and hexanedinitrile, employing a borrowing hydrogenation strategy was reported. A class of phosphine-free manganese (I) complexes I [R2 = thiophen-2-yl, [2-(methylsulfanyl)phenyl]methyl, (2-methoxyphenyl)methyl, furan-2-yl] bearing sulfur side arms catalyzed the reaction under mild reaction conditions, where ammonia-borane is used as the source of hydrogen. The synthetic protocol is chemodivergent, as the final product is either primary or secondary amine, which can be controlled by changing the catalyst structure and the polarity of the reaction medium. The significant advantage of this method is that the protocol operates without externally added base or other additives as well as obviates the use of high-pressure dihydrogen gas required for other nitrile hydrogenation reactions. Utilizing this method, a wide variety of primary and sym. and asym. secondary amines were synthesized in high yields. A mechanistic study involving kinetic experiments and high-level DFT computations revealed that both outer-sphere dehydrogenation and inner-sphere hydrogenation were predominantly operative in the catalytic cycle. The experimental process involved the reaction of Bromopentacarbonylmanganese(I)(cas: 14516-54-2Formula: C5BrMnO5)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kaur, Mandeep’s team published research in Organometallics in 2020 | CAS: 14516-54-2

Category: bromides-buliding-blocksIn 2020 ,《Base-Controlled Directed Synthesis of Metal-Methyleneimidazoline (MIz) and Metal-Mesoionic Carbene (MIC) Compounds》 was published in Organometallics. The article was written by Kaur, Mandeep; Patra, Kamaless; Din Reshi, Noor U.; Bera, Jitendra K.. The article contains the following contents:

C2-Substituted imidazolium salts undergo base-controlled metalation of 2-Me group or formation of C4-metalated (MIC) complexes in reaction with ruthenium chloride-bridged precursor. Reactions of a host of metal precursors with pyridyl(benzamide)-functionalized C2-methyl-protected imidazolium salts [L1H2]I and [L2H]I afforded the metal-methyleneimidazoline (MIz) compounds [Ru(L1-κC1)(p-cymene)]I (1, H2L1-I = PhCONH-2,6-py-2,3-Me2-1H-imidazolium iodide), [Mn(L1-κC1)(CO)3] (2), [Ru(L2-κC1)(p-cymene)Cl]PF6(3, HL2-I = 2,3-dimethyl-1-(2-pyridyl)-1H-imidazolium iodide), and [Ir(L2-κC1)(Cp*)Cl]PF6 (4) in the presence of different external bases, such as LiHMDS, Na2CO3, tBuOK, and NaH. However, the use of NaOAc led to the selective formation of the metal-mesoionic carbene (MIC) compounds [Ru(L2-κC5)(p-cymene)Cl]PF6 (5), [Ir(L2-κC5)(Cp*)Cl]PF6 (6), [Ir2(L1-κC5)(Cp*)2I]PF6 (8), and the ortho-metalated compound [Ir(L1)(Cp*)I] (7). All compounds have been characterized by spectroscopic techniques and X-ray crystallog. Being more acidic, the C2-Me is readily deprotonated by the external base to give the metal-MIz products. A metal-bound acetate, in contrast, interacts selectively with the imidazolium C5-H and drives the reaction toward the metal-MIC formation. DFT calculations support a concerted metalation-deprotonation pathway for selective C-H activation and metalation. In the experiment, the researchers used Bromopentacarbonylmanganese(I)(cas: 14516-54-2Category: bromides-buliding-blocks)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yang, Yong’s team published research in Inorganic Chemistry in 2020 | CAS: 14516-54-2

《Highly Active Manganese-Based CO2 Reduction Catalysts with Bulky NHC Ligands: A Mechanistic Study》 was written by Yang, Yong; Zhang, Zhenyu; Chang, Xiaoyong; Zhang, Ya-Qiong; Liao, Rong-Zhen; Duan, Lele. Safety of Bromopentacarbonylmanganese(I) And the article was included in Inorganic Chemistry in 2020. The article conveys some information:

Because of the strong σ-donor and weak π-acceptor of the N-heterocyclic carbene (NHC), Mn-NHC complexes are active for the reduction of CO2 to CO with high activity. However, some NHC-based Mn complexes showed low catalytic activity and required very neg. potentials. The authors report herein that complex fac-[MnI(bis-MesNHC)(CO)3Br] [1; bis-MesNHC = 3,3-bis(2,4,6-trimethylphenyl)-(1,1′-diimidazolin-2,2′-diylidene)methane] could catalyze the electrochem. reduction of CO2 to CO with high activity (TOFmax = 3180 ± 6 s-1) at a less neg. potential. Due to the introduction of the bulky Mes groups, a 1-electron-reduced intermediate {[Mn0(bis-MesNHC)(CO)3]0 (2•)} was isolated as a packed dimer and crystallog. characterized. Stopped-flow FTIR spectroscopy was used to prove the direct reaction between doubly reduced intermediate fac-[Mn(bis-MesNHC)(CO)3]- and CO2; the tetracarbonyl Mn complex [Mn+(bis-MesNHC)(CO)4]+ ([2-CO]+) was captured, and its further reduction proposed as the rate-limiting step. The Mes groups on the NHC ligand improve the catalytic performance of 1 with respect to electrochem. reduction of CO2 to CO. The rate-limiting step probably is the reduction of the tetracarbonyl Mn+ species. In the experimental materials used by the author, we found Bromopentacarbonylmanganese(I)(cas: 14516-54-2Safety of Bromopentacarbonylmanganese(I))

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary