Category: bromides-buliding-blocks

《Prediction of Electrical Conductivity of Deep Eutectic Solvents Using COSMO-RS Sigma Profiles as Molecular Descriptors: A Quantitative Structure-Property Relationship Study》 was written by Lemaoui, Tarek; Darwish, Ahmad S.; Hammoudi, Nour El Houda; Abu Hatab, Farah; Attoui, Ayoub; Alnashef, Inas M.; Benguerba, Yacine. SDS of cas: 1779-49-3 And the article was included in Industrial & Engineering Chemistry Research in 2020. The article conveys some information:

This work presents the development of mol.-based math. models for the prediction of elec. conductivity of deep eutectic solvents (DESs). Two new quant. structure-property relation (QSPR) models based on conductor-like screening model for real solvent (COSMO-RS) mol. charge d. distributions (Sσ-profiles) were developed using the data obtained from the literature. The data comprise 236 exptl. elec. conductivity measurements for 21 ammonium- and phosphonium-based DESs, covering a wide range of temperatures and molar ratios. First, the hydrogen-bond acceptors (HBAs) and hydrogen-bond donors (HBDs) of each DES were successfully modeled using COSMO-RS. Then, the calculated Sσ-profiles were used as mol. descriptors. The relation between the conductivity and the descriptors in both models was expressed via multiple linear regression. The first model accounted for the structure of the HBA, the HBD, the molar ratio, and temperature, whereas the second model addnl. incorporated the interactions between the mol. descriptors. By accounting for the interactions, the regression coefficient (R2) of the predictive model can be increased from 0.801 to 0.985. Addnl., the scope and reliability of the models were further assessed using the applicability domain anal. The findings showed that QSPR models based on Sσ-profiles as mol. descriptors are excellent at describing the properties of DESs. Accordingly, the obtained model in this work can be used as a useful guideline in selecting DESs with the desired elec. conductivity for industrial applications.Methyltriphenylphosphonium bromide(cas: 1779-49-3SDS of cas: 1779-49-3) 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.SDS of cas: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《A Bioorthogonal Click Chemistry Toolbox for Targeted Synthesis of Branched and Well-Defined Protein-Protein Conjugates》 was published in Angewandte Chemie, International Edition in 2020. These research results belong to Baalmann, Mathis; Neises, Laura; Bitsch, Sebastian; Schneider, Hendrik; Deweid, Lukas; Werther, Philipp; Ilkenhans, Nadja; Wolfring, Martin; Ziegler, Michael J.; Wilhelm, Jonas; Kolmar, Harald; Wombacher, Richard. Application In Synthesis of 8-Bromooctanoic acid The article mentions the following:

Bioorthogonal chem. holds great potential to generate difficult-to-access protein-protein conjugate architectures. Current applications are hampered by challenging protein expression systems, slow conjugation chem., use of undesirable catalysts, or often do not result in quant. product formation. Here the authors present a highly efficient technol. for protein functionalization with commonly used bioorthogonal motifs for Diels-Alder cycloaddition with inverse electron demand (DAinv). With the aim of precisely generating branched protein chimeras, the authors systematically assessed the reactivity, stability and side product formation of various bioorthogonal chemistries directly at the protein level. The authors demonstrate the efficiency and versatility of the authors′ conjugation platform using different functional proteins and the therapeutic antibody trastuzumab. This technol. enables fast and routine access to tailored and hitherto inaccessible protein chimeras useful for a variety of scientific disciplines. The authors expect the authors′ work to substantially enhance antibody applications such as immunodetection and protein toxin-based targeted cancer therapies. In the experiment, the researchers used many compounds, for example, 8-Bromooctanoic acid(cas: 17696-11-6Application In Synthesis of 8-Bromooctanoic acid)

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. And 8-Bromooctanoic Acid is a useful compound for sonodynamic therapy.Application In Synthesis of 8-Bromooctanoic acid

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Liquid-Liquid Equilibrium Measurements for the Extraction of Pyridine and Benzothiazole from n-Alkanes Using Deep Eutectic Solvents》 were Warrag, Samah E. E.; Alli, Ruth D.; Kroon, Maaike C.. And the article was published in Journal of Chemical & Engineering Data in 2019. COA of Formula: C19H18BrP The author mentioned the following in the article:

The liquid-liquid extraction of a nitrogen-containing aromatic “”pyridine”” and nitrogen/sulfur-containing aromatic “”benzothiazole”” from n-hexane and n-heptane using deep eutectic solvents (DESs) was studied in this work. A DES composed of methyltriphenylphosphonium bromide as hydrogen bond acceptor and ethylene glycol as hydrogen bond donor was selected for this separation The main objective of this work was to assess whether the same DES can be applied for the denitrogenation “”extraction of pyridine”” and desulfurization “”extraction of benzothiazole”” of fuels. Moreover, the influence of n-alkane chain length on the extraction performance was studied. First, the solubilities of the pyridine, benzothiazole, n-hexane, and n-heptane in the DES were determined at 298.2 K and 1.01 bar. Thereafter, the pseudoternary liquid-liquid equilibrium (LLE) data for the four systems {n-hexane + pyridine + DES}, {n-heptane + pyridine + DES}, {n-hexane + benzothiazole + DES}, and {n-heptane + benzothiazole + DES} were determined at a temperature of 298.2 K and a pressure of 1.01 bar. The assumption of a pseudoternary system was validated showing that none of the DES’ constituents appears in the raffinate phase. From the LLE data the distribution ratios and selectivites of pyridine and benzothiazole were calculated Both pyridine and benzothiazole were successfully extracted from their mixtures with n-hexane and n-heptane, with pyridine showing higher selectivity than benzothiazole and almost similar distribution ratios. Finally, The LLE data were correlated with the nonrandom two-liquid model using ASPEN PLUS. The modeled results showed a strong correlation with the exptl. results (relative mean standard deviation (%)) = 0.04-0.36. After reading the article, we found that the author used 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

In 2019,European Journal of Organic Chemistry included an article by Esteves, Henrique A.; Darbem, Mariana P.; Pimenta, Daniel C.; Stefani, Helio A.. Related Products of 3395-91-3. The article was titled 《Carbonylative Negishi-Type Coupling of 2-Iodoglycals with Alkyl and Aryl Halides》. The information in the text is summarized as follows:

C-Glycosides are valuable organic compounds in the field of medicinal chem. due to their ubiquity inside living systems and pronounced biol. activity. Herein, we describe an approach to alkyl-ketones bearing glycal units, e.g. I, via the Pd-catalyzed carbonylative coupling of 2-iodoglycals and alkyl and aryl halides. Examples bearing a variety of functional groups are presented as well as a mechanistic proposal for this transformation. In the experiment, the researchers used Methyl 3-bromopropanoate(cas: 3395-91-3Related Products of 3395-91-3)

Methyl 3-bromopropanoate(cas: 3395-91-3) belongs to bromides. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents.Related Products of 3395-91-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2018,Maezono, Shizuka Mei Bautista; Park, Ga Eul; Lee, Yong Rok published 《Regiospecific construction of diverse and polyfunctionalized γ-pyrone cores by indium(III)-catalyzed annulation of diazodicarbonyls with active methylenes, 4-hydroxycoumarins, or 4-hydroxyquinolinone》.Organic Chemistry Frontiers published the findings.Synthetic Route of Br3In The information in the text is summarized as follows:

An efficient and novel construction of diverse and polyfunctionalized γ-pyrones has been developed by InBr3-catalyzed annulation of various cyclic and acyclic diazo compounds with multifarious active methylenes, 4-hydroxycoumarins, or 4-hydroxyquinolinone. This technique proceeds through a cascade of carbene generation/ketene formation/conjugate addition/intramol. cyclization/elimination reactions. In addition, transformation of the synthesized compound for further functionalization is realized.Indium(III) bromide(cas: 13465-09-3Synthetic Route of Br3In) was used in this study.

Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.Synthetic Route of Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2017,Bhattarai, Deepak; Jung, Joo Hyun; Han, Seunghyeon; Lee, Hankyu; Oh, Soo Jin; Ko, Hyuk Wan; Lee, Kyeong published 《Design, synthesis, and biological evaluation of structurally modified isoindolinone and quinazolinone derivatives as hedgehog pathway inhibitors》.European Journal of Medicinal Chemistry published the findings.Application of 76006-33-2 The information in the text is summarized as follows:

The Hedgehog (Hh) signaling pathway is associated with diverse aspects of cellular events, such as cell migration, proliferation, and differentiation throughout embryonic development and tissue patterning. An abnormal Hh signaling pathway is linked to numerous human cancers, including basal cell carcinoma (BCC), medulloblastoma (MB), lung cancer, prostate cancer, and ovarian cancer, and it is therefore a promising target in cancer therapy. Using a structure-hopping approach, we designed new Hh signaling pathway inhibitors with isoindolinone or quinazolinone moieties, which were synthesized and biol. evaluated using an 8xGli-luciferase (Gli-Luc) reporter assay in NIH3T3 cells. Compounds with isoindolinone scaffolds demonstrated moderate Hh inhibitory activity; whereas quinazolinone derivatives exhibited good potency with submicromolar IC50 values and the analog I showed nanomolar IC50 value. Although sonidegib shows a decrease in inhibitory effect on vismodegib resistance-conferring Smo mutants, the structurally modified new compounds not only possess the pharmacophoric properties of Hh pathway inhibition but also preserve the suppressive potency in drug-resistant Smo mutants. Mechanistically, quinazolinone derivatives I and II suppress Hh signaling by blocking Smo and Gli translocation into the cilia, similar to vismodegib and sonidegib. Addnl., the human microsomal stability of the representative analogs I and II were determined to be comparable to that of the reference compound sonidegib. Thus, these new scaffolds can serve as a platform for the development of novel cancer therapeutics targeting the Hh pathway. The results came from multiple reactions, including the reaction of 3-Bromo-2-methylbenzoic acid(cas: 76006-33-2Application of 76006-33-2)

3-Bromo-2-methylbenzoic acid(cas: 76006-33-2) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Application of 76006-33-2 Due to the reactivity of bromide, they are used as potential precursors or important intermediates in organic synthesis.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,European Journal of Pharmacology included an article by Wojcik-Pszczola, Katarzyna; Chlon-Rzepa, Grazyna; Jankowska, Agnieszka; Ellen, Eugenie; Swierczek, Artur; Pociecha, Krzysztof; Koczurkiewicz, Paulina; Piska, Kamil; Gawedzka, Anna; Wyska, Elzbieta; Knapik-Czajka, Malgorzata; Pekala, Elzbieta; Gosens, Reinoud. Safety of Ethyl 4-bromobutyrate. The article was titled 《Novel phosphodiesterases inhibitors from the group of purine-2,6-dione derivatives as potent modulators of airway smooth muscle cell remodelling》. The information in the text is summarized as follows:

Airway remodelling (AR) is an important pathol. feature of chronic asthma and chronic obstructive pulmonary disease. The etiol. of AR is complex and involves both lung structural and immune cells. One of the main contributors to airway remodelling is the airway smooth muscle (ASM), which is thickened by asthma, becomes more contractile and produces more extracellular matrix. As a second messenger, adenosine 3′,5′-cyclic monophosphate (cAMP) has been shown to contribute to ASM cell (ASMC) relaxation as well as to anti-remodelling effects in ASMC. Phosphodiesterase (PDE) inhibitors have drawn attention as an interesting new group of potential anti-inflammatory and anti-remodelling drugs. Recently, new hydrazide and amide purine-2,6-dione derivatives with anti-inflammatory properties have been synthesized by our team (compounds 1 and 2). The results show that both compounds have subtype specificity for several PDE isoforms (including inhibition of PDE1, PDE3, PDE4 and PDE7). Interestingly, such combined PDE subtype inhibition exerts improved anti-remodelling efficacies against several ASMC-induced responses such as proliferation, contractility, extracellular matrix (ECM) protein expression and migration when compared to other non-selective and selective PDE inhibitors. Our findings open novel perspectives in the search for new chem. entities with dual anti-inflammatory and anti-remodelling profiles in the group of purine-2,6-dione derivatives as broad-spectrum PDE inhibitors. The experimental part of the paper was very detailed, including the reaction process of Ethyl 4-bromobutyrate(cas: 2969-81-5Safety of Ethyl 4-bromobutyrate)

Ethyl 4-bromobutyrate(cas: 2969-81-5) belongs to bromides. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents.Safety of Ethyl 4-bromobutyrate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2015,Schweighauser, Luca; Strauss, Marcel A.; Bellotto, Silvia; Wegner, Hermann A. published 《Attraction or Repulsion? London Dispersion Forces Control Azobenzene Switches》.Angewandte Chemie, International Edition published the findings.Recommanded Product: 3,5-Dibromoaniline The information in the text is summarized as follows:

Large substituents are commonly seen as entirely repulsive through steric hindrance. Such groups have addnl. attractive effects arising from weak London dispersion forces between the neutral atoms. Steric interactions are recognized to have a strong influence on isomerization processes, such as in azobenzene-based mol. switches. Textbooks indicate that steric hindrance destabilizes the Z isomers. Herein, increasing the bulkiness of electronically equal substituents in the meta-position decreases the thermal reaction rates from the Z to the E isomers. DFT computations revealed that attractive dispersion forces essentially lower the energy of the Z isomers. In the experimental materials used by the author, we found 3,5-Dibromoaniline(cas: 626-40-4Recommanded Product: 3,5-Dibromoaniline)

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. Amines have a free lone pair with which they can coordinate to metal centers. Amine–metal bonds are weaker because amines are incapable of backbonding, but they are still important for sensing applications.While stronger than hydrogen bonds, amine–metal bonds are still weaker than both covalent and ionic bonds.Recommanded Product: 3,5-Dibromoaniline

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Usutani, Hirotsugu; Cork, David G. published an article in Organic Process Research & Development. The title of the article was 《Effective Utilization of Flow Chemistry: Use of Unstable Intermediates, Inhibition of Side Reactions, and Scale-Up for Boronic Acid Synthesis》.Formula: C12H15BrO The author mentioned the following in the article:

Flow chem. processes for boronic acid syntheses utilizing lithiation-borylation have been developed. The side reactions in the lithiation step that occur in batch were suppressed, and unstable lithium intermediates were handled safely. Flow technol. was applied to several kinds of boronic acid syntheses, and scale-up was successfully conducted to allow kilogram-scale production Some of the key benefits of flow flash chem. were utilized, both to avoid side reactions and to enable dianion chem. that is difficult to perform successfully in batch reactions. The examples showed further perspectives on the utility of flow technologies for process development. In the experimental materials used by the author, we found 1-Bromo-4-(cyclohexyloxy)benzene(cas: 30752-31-9Formula: C12H15BrO)

1-Bromo-4-(cyclohexyloxy)benzene(cas: 30752-31-9) belongs to organobromine compounds.Most of the natural organobromine compounds are produced by marine organisms , and several brominated metabolites with antibacterial , antitumor , antiviral , and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. Formula: C12H15BrO In contrast, terrestrial plants account only for a few bromine-containing compounds.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Muramatsu, Tatsuya; Okado, Yuji; Traeger, Hanna; Schrettl, Stephen; Tamaoki, Nobuyuki; Weder, Christoph; Sagara, Yoshimitsu published an article in Journal of the American Chemical Society. The title of the article was 《Rotaxane-Based Dual Function Mechanophores Exhibiting Reversible and Irreversible Responses》.Application of 583-69-7 The author mentioned the following in the article:

Mechanochromic mechanophores permit the design of polymers that indicate mech. events through optical signals. Here we report rotaxane-based supramol. mechanophores that display both reversible and irreversible fluorescence changes. These responses are triggered by different forces and are achieved by exploiting the mol. shuttling function and force-induced dethreading of rotaxanes. The new rotaxane mechanophores are composed of a ring featuring a luminophore, which is threaded onto an axle with a matching quencher and two stoppers. In the stress-free state, the luminophore is preferentially located in the proximity of the quencher, and the emission is quenched. The luminophore slides away from the quencher when a force is applied and the fluorescence is switched on. This effect is reversible, unless the force is so high that the luminophore-carrying ring slips past the stopper and dethreading occurs. We show that the combination of judiciously selected ring and stopper moieties is crucial to attain interlocked structures that display such a dual response. PU elastomers that contain such doubly responsive rotaxanes exhibit reversible fluorescence changes over multiple loading-unloading cycles due to the shuttling function, whereas permanent changes are observed upon repeated deformations to high strains due to breakage of the mech. bond upon dethreading of the ring from the axle. This response allows one, at least conceptually, to monitor the actual deformation of polymer materials and examine mech. damage that was inflicted in the past on the basis of an optical signal. In the experiment, the researchers used 2-Bromobenzene-1,4-diol(cas: 583-69-7Application of 583-69-7)

2-Bromobenzene-1,4-diol(cas: 583-69-7) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Application of 583-69-7 Alkyl bromides are mainly used as alkylating agents and also find application as a solvent to extract oil from seeds and wool.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary