Category: bromides-buliding-blocks

Zhang, Guang-Ya; Ruan, Sun-Hong; Li, Yan-Yun; Gao, Jing-Xing published their research in Chinese Chemical Letters in 2021. The article was titled 《Manganese catalyzed asymmetric transfer hydrogenation of ketones》.Safety of Bromopentacarbonylmanganese(I) The article contains the following contents:

The asym. transfer hydrogenation (ATH) of a wide range of ketones catalyzed by manganese complex as well as chiral PxNy-type ligand under mild conditions was investigated. Using 2-propanol as hydrogen source, various ketones could be enantioselectively hydrogenated by combining cheap, readily available [MnBr(CO)5] with chiral, 22-membered macrocyclic ligand (R,R,R’,R’)-CyP2N4 I with 2 mol% of catalyst loading, affording highly valuable chiral alcs. with up to 95% ee. The results came from multiple reactions, including the reaction of Bromopentacarbonylmanganese(I)(cas: 14516-54-2Safety of Bromopentacarbonylmanganese(I))

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.Safety of Bromopentacarbonylmanganese(I)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hong, Haitao; Wu, Ni; Han, Mingxi; Guo, Zhiyong; Zhan, Hongbing; Du, Shaowu; Chen, Banglin published their research in Materials Chemistry Frontiers in 2021. The article was titled 《An anthracene based conjugated triazine framework as a luminescent probe for selective sensing of p-nitroaniline and Fe(III) ions》.SDS of cas: 523-27-3 The article contains the following contents:

Covalent triazine frameworks (CTFs), as a burgeoning type of porous organic material, have attracted increasing attention in a lot of research fields, including gas separation, heterogeneous catalysis, etc. In particular, stemming from their heteroatom effect (HAE), incorporated with the merits of π-conjugated frameworks, electron-rich triazine units and extraordinary chem. stability, they exhibit prospective potential applications in chem. sensing. In this paper, a triazine-based conjugated porous organic polymer (DPA-CTF) containing anthracene units was used to study the sensing effects on nitroarom. compounds and metal ions. Intriguingly, DPA-CTF showed sensitive detection performance towards nitroarom. explosives, especially p-nitroaniline (p-NA). Besides, it also exhibited high sensitivity toward Fe3+ ions compared to other metal ions. A series of characterization studies and computational simulations were used to explain the mechanism of the luminescence quenching effect. These results manifest that the new synthesized CTF is a promising candidate as a chem. sensor for p-NA and Fe3+ ions. In addition to this study using 9,10-Dibromoanthracene, there are many other studies that have used 9,10-Dibromoanthracene(cas: 523-27-3SDS of cas: 523-27-3) was used in this study.

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.SDS of cas: 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Thiocyanation and 2-Amino-1,3-thiazole Formation in Water Using Recoverable and Reusable Glycosylated Resorcin[4]arene Cavitands》 was published in Journal of Organic Chemistry in 2020. These research results belong to Husain, Ali A.; Bisht, Kirpal S.. Safety of Ethyl 3-bromopropanoate The article mentions the following:

A family of three spatially directional resorcin[4]arene cavitand glycoconjugates (RCGs) have been applied as efficient recoverable and reusable inverse phase transfer catalysts for eco- and environmentally friendly thiocyanation and 2-amino-1,3-thiazole formation reactions in water. The results show that RCGs (1 mol %) were capable of hosting and catalyzing various water-insoluble bromo/thiocyanato substrates in water without the use of any co-organic solvents. The recoverability and reusability of RCG catalytic systems, i.e., RCG1 and RCG3, were also examined upon a simple extraction of the desired products using DCM or Et acetate, followed by subjecting the recovered aqueous solution containing the RCG catalysts to the next reaction cycles. The experimental process involved the reaction of Ethyl 3-bromopropanoate(cas: 539-74-2Safety of Ethyl 3-bromopropanoate)

Ethyl 3-bromopropanoate(cas: 539-74-2) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals.Safety of Ethyl 3-bromopropanoate Organobromine compounds have fallen under increased scrutiny for their environmental impact.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Alkynyl-functionalized chain-extended PCL for coupling to biological molecules》 was published in European Polymer Journal in 2020. These research results belong to Izraylit, Victor; Hommes-Schattmann, Paul J.; Neffe, Axel T.; Gould, Oliver E. C.; Lendlein, Andreas. Computed Properties of C8H15BrO2 The article mentions the following:

Chem. functionalization of poly(ε-caprolactone) (PCL) enables a mol. integration of addnl. function. Here, the authors report an approach to incorporate reactive alkynyl side-groups by synthesizing a chain-extended PCL, where the reactive site is introduced through the covalently functionalizable chain extender 3-(prop-2-yn-1-yloxy)propane-1,2-diol (YPD). Chain-extended PCL with Mw of 101 to 385 kg·mol-1 were successfully synthesized in a one-pot reaction from PCL-diols with various molar masses, L-lysine Et ester diisocyanate (LDI) or trimethyl(hexamethylene)diisocyanate (TMDI), and YPD, in which the d. of functionalizable groups and spacing between them can be controlled by the composition of the polymer. The employed diisocyanate compounds and YPD possess an asym. structure and form a non-crystallizable segment leaving the PCL crystallites to dominate the material′s mech. properties. The mixed glass transition temperature Tg = -60 to -46° of the PCL/polyurethane amorphous phase maintains the synthesized materials in a highly elastic state at ambient and physiol. conditions. Reaction conditions for covalent attachment in copper(I)-catalyzed azide-alkyne-cycloaddition reactions (CuAAC) in solution were optimized in a series of model reactions between the alkyne moieties of the chain-extended PCL and benzyl azide, reaching conversions over 95% of the alkyne moieties and with yields of up to 94% for the purified functionalized PCL. This methodol. was applied for reaction with the azide-functionalized cell adhesion peptide GRGDS. The required modification of the peptide provides selectivity in the coupling reactions. The obtained results suggest that YPD could potentially be employed as versatile mol. unit for the creation of a variety of functionalizable polyesters as well as polyurethanes and polycarbonates offering efficient and selective click-reactions. In the experiment, the researchers used 8-Bromooctanoic acid(cas: 17696-11-6Computed Properties of C8H15BrO2)

8-Bromooctanoic acid(cas: 17696-11-6) acid is used in the synthesis of 8-(N-Methyl-4,4′-bipyridinyl)- octanoic acid. 8-Mercaptooctanoic acid was prepared from 8-bromooctanoic acid.Computed Properties of C8H15BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Synthesis and characterization of analogues of glycine-betaine ionic liquids and their use in the formation of aqueous biphasic systems》 were Pereira, Matheus M.; Pedro, Sonia N.; Gomes, Joana; Sintra, Tania E.; Ventura, Sonia P. M.; Coutinho, Joao A. P.; Freire, Mara G.; Mohamadou, Aminou. And the article was published in Fluid Phase Equilibria in 2019. Product Details of 2969-81-5 The author mentioned the following in the article:

A series of novel analogs of glycine-betaine ionic liquids (AGB-ILs), viz. 1-(4-ethoxy-4-oxobutyl)-1-methylpyrrolidin-1-ium, N,N,N-tri(n-butyl)(4-ethoxy-4-oxobutyl)-1-phosphonium and N,N,N-trialkyl(4-ethoxy-4-oxobutyl)-1-aminium cations with Et, Pr and Bu alkyl chains, combined with the bromide anion, have been synthesized and characterized. Their synthesis and characterization by spectroscopic methods and elemental anal. is here reported. These ILs were further characterized in what concerns their thermal properties and ecotoxicity against Allvibrio fischeri, and compared with the com. tetra(n-butyl)ammonium and tetra(n-butyl)phosphonium bromide. The novel AGB-ILs described in this work have low m.ps., below 100°C, display high degradation temperatures (180-310°C), and low toxicity as shown by being harmless or practically harmless towards the marine bacteria Allvibrio fischeri. Finally, the ability of the synthesized AGB-ILs to form aqueous biphasic systems with potassium citrate/citric acid (at pH 7) was evaluated, and the resp. ternary phase diagrams were determined It is shown that the increase of the cation alkyl chain length facilitates the creation of ABS, and that phosphonium-based ILs present a slightly better separation performance in presence of aqueous solutions of the citrate-based salt. In the experiment, the researchers used Ethyl 4-bromobutyrate(cas: 2969-81-5Product Details of 2969-81-5)

Ethyl 4-bromobutyrate(cas: 2969-81-5) belongs to bromides. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. Organobromine compounds have fallen under increased scrutiny for their environmental impact.Product Details of 2969-81-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Synergistic cooperation of bi-active hydrogen atoms in protic carboxyl imidazolium ionic liquids to push cycloaddition of CO2 under benign conditions》 were Wang, Tengfei; Zhu, Xinrui; Mao, Lemin; Liu, Yi; Ren, Tiegang; Wang, Li; Zhang, Jinglai. And the article was published in Journal of Molecular Liquids in 2019. Formula: C6H11BrO2 The author mentioned the following in the article:

Nine protic carboxyl imidazolium ionic liquids were synthesized. Then, they were employed to catalyze the chem. fixation of carbon dioxide (CO2) and propylene oxide leading to propylene carbonate in the absence of co-catalyst and organic solvent. HCPImBr presents the best catalytic activity with the product yield of 92% under reaction temperature 120°C, CO2 initial pressure 1.5 MPa, catalyst amount 0.5 mol%, and reaction time 2.0 h. Even if the reaction temperature and CO2 initial pressure are decreased to 80°C and 1.0 MPa, resp., the 85% of product yield would be kept with the 1.0% catalyst dosage along with 12.0 h. With the exception of the most optimal reaction conditions, generality, and recyclability of HCPImBr are also investigated. More importantly, the reaction mechanism is investigated by the d. functional theory, which is the first time to report the mechanism for protic carboxyl imidazolium ionic liquids The catalytic activity of ionic liquids would be further improved with the reasonable combination of cation and anion. In the part of experimental materials, we found many familiar compounds, such as Ethyl 4-bromobutyrate(cas: 2969-81-5Formula: C6H11BrO2)

Ethyl 4-bromobutyrate(cas: 2969-81-5) belongs to bromides. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. Organobromine compounds have fallen under increased scrutiny for their environmental impact.Formula: C6H11BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Journal of Organic Chemistry included an article by Empel, Claire; Patureau, Frederic W.; Koenigs, Rene M.. HPLC of Formula: 6825-20-3. The article was titled 《Visible Light Induced Metal-Free Carbene N-Carbazolation》. The information in the text is summarized as follows:

Metal-free N-H functionalization reactions represent an important strategy for sustainable C-N coupling reactions. In this report, we describe the visible light photolysis of aryl diazoacetates in the presence of some N-heterocycles that enables mild, metal-free N-H functionalization reactions of carbazole and azepine heterocycles (15 examples, up to 83% yield). After reading the article, we found that the author used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3HPLC of Formula: 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.HPLC of Formula: 6825-20-3

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

In 2019,Reactive & Functional Polymers included an article by Zhang, Shuai; Zhu, Xiuling; Jin, Cuihong; Hu, Huilan. HPLC of Formula: 629-03-8. The article was titled 《Pyridinium-functionalized crosslinked anion exchange membrane based on multication side chain tethered elastomeric triblock poly(styrene-b-(ethylene-co-butylene)-b-styrene)》. The information in the text is summarized as follows:

Hydroxide ion conductivity and long-term chem. stability play an important role in the development of anion exchange membranes (AEMs) for application of alk. anion exchange membrane fuel cells (AAEMFCs). Herein, the high alk. stable elastomeric triblock copolymer, poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) with pendent multi-cation side chain and 4,4-bipyridine was develop for AEMs. The three cations in a side chain were tethered to the SEBS backbone and the length of the spacer between cations was six methylene (-CH2-) groups (TNQN). More importantly, the 4,4-bipridine was introduced to the membranes as the crosslinker and functional groups, which exhibited the significant improvement in hydroxide ion conductivity of the membranes. The hydroxide conductivity of the cross-linked quaternized SEBS (TNQN-SEBS-Bpy) membranes was 30.41-69.04 mS·cm-1 from 30°C to 80°C, which could be ascribed to well micromorphol. and more functional groups. Compared to the uncross-linked TNQN-SEBS, the TNQN-SEBS-Bpy membranes showed higher mech. property and thermal stability. All the membranes exhibited good alk. stability which the hydroxide conductivity maintained above 90% of the original ionic conductivity after 300 h of alk. treatment (1 M aqueous NaOH) at 80°C. Based on these outstanding properties, the cross-linked membranes show great potential application as alk. anion exchange membranes. In the experimental materials used by the author, we found 1,6-Dibromohexane(cas: 629-03-8HPLC of Formula: 629-03-8)

1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of pyrrolo-tetrathiafulvalene molecular bridge (6PTTF6) to study redox switching behavior of single molecules; synthesis of water-soluble thermoresponsive polylactides.HPLC of Formula: 629-03-8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Journal of Luminescence included an article by Majeed, Shereen A.; Nwaji, Njemuwa; Mack, John; Nyokong, Tebello; Makhseed, Saad. Computed Properties of C12H7Br2N. The article was titled 《Nonlinear optical responses of carbazole-substituted phthalocyanines conjugated to graphene quantum dots and in thin films》. The information in the text is summarized as follows:

Three different phthalocyanine complexes substituted with carbazoles were conjugated to graphene quantum dots (GQDs) through π-π stacking. The morphologies, sizes, and crystallinities of the nanoconjugates were determined using Raman spectroscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, and X-ray diffraction. The nonlinear optical (NLO) properties of the metallophthalocyanines alone and when conjugated to the GQD nanomaterial in different solvents, as well as after having been embedded in thin films, were studied. The effects of the different substituents and solvents on the NLO properties of the metallophthalocyanines were evaluated. Enhancements in the photophys. properties of the complexes upon conjugation with the nanomaterial were observed Fluorescence quantum yields, fluorescence lifetimes, triplet quantum yields, and triplet lifetimes were measured for the complexes, and for their conjugates in DMSO. The results came from multiple reactions, including the reaction of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Computed Properties of C12H7Br2N)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.Computed Properties of C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary