Category: bromides-buliding-blocks

The author of 《Oxazole-bridged combretastatin A-4 derivatives with tethered hydroxamic acids: structure-activity relations of new inhibitors of HDAC and/or tubulin function》 were Schmitt, Florian; Gosch, Lisa Chiara; Dittmer, Alexandra; Rothemund, Matthias; Mueller, Thomas; Schobert, Rainer; Biersack, Bernhard; Volkamer, Andrea; Hoepfner, Michael. And the article was published in International Journal of Molecular Sciences in 2019. Safety of Ethyl 5-bromovalerate The author mentioned the following in the article:

New inhibitors of tubulin polymerization and/or histone deacetylase (HDAC) activity were synthesized by attaching alkyl tethered hydroxamic acid appendages of varying length to oxazole-bridged combretastatin A-4 analogous caps. While their antiproliferative and microtubule disrupting effect was most pronounced for derivatives with short spacers, HDAC inhibition was strongest for those with longer spacers. These findings were further supported by computational methods such as structure-based docking experiments exploring the target interactions of the derivatives with varying linkers. For instance, compounds featuring short four-atom spacers between cap and hydroxamic acid inhibited the growth of various cancer cell lines and human endothelial hybrid cells with IC50 values in the low nanomolar range. In line with their ability to inhibit the microtubule assembly, four- and five-atom spacered hydroxamic acids caused an accumulation of 518A2 melanoma cells in G2/M phase, whereas a compound featuring a six-atom spacer and performing best in HDAC inhibition, induced a G1 arrest in these cells. All these beneficial anticancer activities together with their selectivity for cancer cells over non-malignant cells, point out the great potential of these novel pleiotropic HDAC and tubulin inhibitors as drug candidates for cancer therapy. In the part of experimental materials, we found many familiar compounds, such as Ethyl 5-bromovalerate(cas: 14660-52-7Safety of Ethyl 5-bromovalerate)

Ethyl 5-bromovalerate(cas: 14660-52-7) 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.Safety of Ethyl 5-bromovalerate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Mechanistic Characterization of (Xantphos)Ni(I)-Mediated Alkyl Bromide Activation: Oxidative Addition, Electron Transfer, or Halogen-Atom Abstraction》 were Diccianni, Justin B.; Katigbak, Joseph; Hu, Chunhua; Diao, Tianning. And the article was published in Journal of the American Chemical Society in 2019. SDS of cas: 7051-34-5 The author mentioned the following in the article:

Ni(I)-mediated single-electron oxidative activation of alkyl halides has been extensively proposed as a key step in Ni-catalyzed cross-coupling reactions to generate radical intermediates. There are four mechanisms through which this step could take place: oxidative addition, outer-sphere electron transfer, inner-sphere electron transfer, and concerted halogen-atom abstraction. Despite considerable computational studies, there is no exptl. study to evaluate all four pathways for Ni(I)-mediated alkyl radical formation. Herein, we report the isolation of a series of (Xantphos)Ni(I)-Ar complexes that selectively activate alkyl halides over aryl halides to eject radicals and form Ni(II) complexes. This observation allows the application of kinetic studies on the steric, electronic, and solvent effects, in combination with DFT calculations, to systematically assess the four possible pathways. Our data reveal that (Xantphos)Ni(I)-mediated alkyl halide activation proceeds via a concerted halogen-atom abstraction mechanism. This result corroborates previous DFT studies on (terpy)Ni(I)- and (py)Ni(I)-mediated alkyl radical formation, and contrasts with the outer-sphere electron transfer pathway observed for (PPh3)4Ni(0)-mediated aryl halide activation. This study of a model system provides insight into the overall mechanism of Ni-catalyzed cross-coupling reactions and offers a basis for differentiating electrophiles in cross-electrophile coupling reactions. In the experiment, the researchers used (Bromomethyl)cyclopropane(cas: 7051-34-5SDS of cas: 7051-34-5)

(Bromomethyl)cyclopropane(cas: 7051-34-5) is used as a synthetic building block for the introduction of the cyclopropylmethyl group. It was also used in the synthesis of 1,4-dienes via iron-catalyzed cross-coupling with alkenyl Grignard reagents.SDS of cas: 7051-34-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Journal of the American Chemical Society included an article by Daub, Mary Elisabeth; Jung, Hoimin; Lee, Byung Joo; Won, Joonghee; Baik, Mu-Hyun; Yoon, Tehshik P.. Safety of Methyltriphenylphosphonium bromide. The article was titled 《Enantioselective [2+2] Cycloadditions of Cinnamate Esters: Generalizing Lewis Acid Catalysis of Triplet Energy Transfer》. The information in the text is summarized as follows:

We report the enantioselective [2+2] cycloaddition of simple cinnamate esters, the products of which are useful synthons for the controlled assembly of cyclobutane natural products. This method utilizes a cocatalytic system in which a chiral Lewis acid accelerates the transfer of triplet energy from an excited-state Ir(III) photocatalyst to the cinnamate ester. Computational evidence indicates that the principal role of the Lewis acid cocatalyst is to lower the absolute energies of the substrate frontier MOs, leading to greater electronic coupling between the sensitizer and substrate and increasing the rate of the energy transfer event. These results suggest Lewis acids can have multiple beneficial effects on triplet sensitization reactions, impacting both the thermodn. driving force and kinetics of Dexter energy transfer. In the part of experimental materials, we found many familiar compounds, such as Methyltriphenylphosphonium bromide(cas: 1779-49-3Safety of Methyltriphenylphosphonium bromide)

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.Safety of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,European Journal of Pharmaceutical Sciences included an article by Trivedi, Prakruti; Adhikari, Nilanjan; Amin, Sk. Abdul; Bobde, Yamini; Ganesh, Routholla; Jha, Tarun; Ghosh, Balaram. Name: Methyl 3-bromopropanoate. The article was titled 《Design, synthesis, biological evaluation and molecular docking study of arylcarboxamido piperidine and piperazine-based hydroxamates as potential HDAC8 inhibitors with promising anticancer activity》. The information in the text is summarized as follows:

Some new hydroxamate derivatives with alkylpiperidine and alkylpiperazine linker moieties were designed, synthesized and biol. evaluated. All these compounds were effective HDAC8 inhibitors comprising more or less similar cytotoxic potential against different cancer cell lines. It was observed that the piperazine scaffold containing compound was more active than the compound with piperidine scaffold for exerting HDAC8 inhibitory activity. Moreover, the 4-quinolyl cap group was better than the biphenyl group which was better than the benzyl group for producing higher HDAC8 inhibition as well as cytotoxicity. These compounds displayed selective HDAC8 inhibition over HDAC3. Moreover, these compounds showed an increased caspase3/7 activity suggesting their anticancer potential through modulation of apoptotic pathways. Mol. docking study with three potent compounds was performed with both HDAC3 and HDAC8 enzymes to understand the selectivity profile of these compounds Compound containing 4-quinolyl cap group with alkyl piperazinyl urea linker moiety was emerged out as the lead mol. that may be further modified to design more effective and selective HDAC8 inhibitors in future. In the experimental materials used by the author, we found Methyl 3-bromopropanoate(cas: 3395-91-3Name: Methyl 3-bromopropanoate)

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.Name: Methyl 3-bromopropanoate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2017,Bag, Subhendu Sekhar; Yashmeen, Afsana published 《Uracil-amino acid as a scaffold for β-sheet peptidomimetics: Study of photophysics and interaction with BSA protein》.Bioorganic & Medicinal Chemistry Letters published the findings.Recommanded Product: 3395-91-3 The information in the text is summarized as follows:

We report herein the uracil-di-aza-amino acid (UrAA) as a new family of mol. scaffold to induce β-hairpin structure with H-bonded β-sheet conformation in a short peptide. This has been demonstrated in two conceptual fluorescent pentapeptides wherein triazolylpyrenyl alanine and/or triazolylmethoxynaphthyl alanine (TPyAlaDo and/or TMNapAlaDo) are embedded into two arms of the uracil-amino acid via an intervening leucine. Conformational anal. by CD, IR, variable temperature and 2D NMR spectroscopy reveals the β-hairpin structures for both the peptides. Study of photophys. property reveals that the pentapeptide containing fluorescent triazolyl unnatural amino acids TMNapAlaDo and TPyAlaDo at the two termini exhibits dual path entry to exciplex emission-either via FRET from TMNapAlaDo to TPyAlaDo or via direct excitation of a FRET acceptor, TPyAlaDo. The other pentapeptide with TPyAlaDo/TPyAlaDo pair shows excimer emission. Furthermore, both the peptides maintaining their fundamental photophysics are found to interact with BSA as only a test biomol. In the experimental materials used by the author, we found Methyl 3-bromopropanoate(cas: 3395-91-3Recommanded Product: 3395-91-3)

Methyl 3-bromopropanoate(cas: 3395-91-3) belongs to bromides. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Recommanded Product: 3395-91-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Miller, Timothy M.; Neenan, Thomas X.; Zayas, Roberto; Bair, Harvey E. published an article on January 29 ,1992. The article was titled 《Synthesis and characterization of a series of monodisperse, 1,3,5-phenylene-based hydrocarbon dendrimers including C276H186 and their fluorinated analogs》, and you may find the article in Journal of the American Chemical Society.Recommanded Product: 29102-67-8 The information in the text is summarized as follows:

The convergent synthesis of a series of monodisperse aromatic dendrimers having mol. diameters 15-31 Å is described. These materials consist of 4,10, 22, or 46 benzene rings linked sym. by σ-bonds. Increasingly large dendrimer arms are prepared stepwise via Pd-catalyzed coupling of arylboronic acids to 3,5-dibromo-1-(trimethylsilyl)benzene. The aryltrimethylsilane is subsequently converted to a new arylboronic acid by reaction with BBr3 followed by hydrolysis. Coupling of arylboronic acid dendrimer arms to 1,3,5-tribromobenzene or 1,3,5-tris(3,5-dibromophenyl)benzene is the final step in the synthesis. A series of dendrimers consisting of 4, 10, and 22 Ph rings sym. arranged in which the outer Ph rings are fluorinated is prepared by a similar sequence of reactions. The largest hydrocarbon dendrimer is soluble to the extent of 190 g/L in PhMe and is stable to 500°. In the experiment, the researchers used 3,3”,5,5”-Tetrabromo-5′-(3,5-dibromophenyl)-1,1′:3′,1”-terphenyl(cas: 29102-67-8Recommanded Product: 29102-67-8)

3,3”,5,5”-Tetrabromo-5′-(3,5-dibromophenyl)-1,1′:3′,1”-terphenyl(cas: 29102-67-8) 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. In contrast, terrestrial plants account only for a few bromine-containing compounds.Recommanded Product: 29102-67-8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Product Details of 3395-91-3In 2020 ,《Thermally Activated Delayed Fluorescence Benzyl Cellulose Derivatives for Nondoped Organic Light-Emitting Diodes》 was published in Macromolecules (Washington, DC, United States). The article was written by Shibano, Masaya; Ochiai, Hiroki; Suzuki, Katsuaki; Kamitakahara, Hiroshi; Kaji, Hironori; Takano, Toshiyuki. The article contains the following contents:

Thermally activated delayed fluorescence (TADF)-benzyl cellulose derivatives (TBC-X), which contained both carbazole (host) and phthalimide-based TADF dye (guest) moieties, were prepared from 2,3-di-O-benzyl cellulose in high yields. The TBC-X samples were soluble in common organic solvents such as CH2Cl2, CHCl3, THF, and toluene. The photoluminescence spectra of TBC-X spin-coated films had a single emission peak derived only from guest moieties, which indicated efficient energy transfer from the host to guest moieties. The TBC-10 (with a content of host and guest moieties of 93 and 7, resp.) in a spin-coated film had the highest photoluminescence quantum yield of 55.3% and TADF characteristics. A nondoped organic light emitting diode with TBC-10 as the emitting layer showed green emission (λEL = 517 nm) and achieved a maximum external quantum efficiency of 5.9%. The results came from multiple reactions, including the reaction of Methyl 3-bromopropanoate(cas: 3395-91-3Product Details of 3395-91-3)

Methyl 3-bromopropanoate(cas: 3395-91-3) belongs to bromides. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Product Details of 3395-91-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Safety of (Bromomethyl)cyclopropaneIn 2019 ,《Dual nickel- and photoredox-catalyzed reductive cross-coupling of aryl vinyl halides and unactivated tertiary alkyl bromides》 was published in Chemical Communications (Cambridge, United Kingdom). The article was written by Yu, Weijie; Chen, Long; Tao, Jiasi; Wang, Tao; Fu, Junkai. The article contains the following contents:

A novel reductive cross-coupling of aryl vinyl halides and unactivated tertiary alkyl bromides was realized via photoredox/nickel dual catalysis to produce vinyl arene derivatives bearing all-carbon quaternary centers with excellent E-selectivity. A stoichiometric metal reductant was avoided by employing com. available N,N,N’,N’-tetramethylethylenediamine (TMEDA) as the terminal reductant. In the experiment, the researchers used many compounds, for example, (Bromomethyl)cyclopropane(cas: 7051-34-5Safety of (Bromomethyl)cyclopropane)

(Bromomethyl)cyclopropane(cas: 7051-34-5) is used as a synthetic building block for the introduction of the cyclopropylmethyl group. It was also used in the synthesis of 1,4-dienes via iron-catalyzed cross-coupling with alkenyl Grignard reagents.Safety of (Bromomethyl)cyclopropane

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthetic Route of Br3InIn 2022 ,《Introducing the Catalytic Amination of Silanes via Nitrene Insertion》 was published in Journal of the American Chemical Society. The article was written by Rodriguez, Anabel M.; Perez-Ruiz, Jorge; Molina, Francisco; Poveda, Ana; Perez-Soto, Raul; Maseras, Feliu; Diaz-Requejo, M. Mar; Perez, Pedro J.. The article contains the following contents:

The direct functionalization of Si-H bonds by the nitrene insertion methodol. is described. A Cu(I) complex bearing a trispyrazolylborate ligand catalyzes the transfer of a nitrene group from PhI:NTs to the Si-H bond of silanes, disilanes, and siloxanes, leading to the exclusive formation of Si-NH moieties in the 1st example of this transformation. The process tolerates other functionalities in the substrate such as several C-H bonds and alkyne and alkene moieties directly bonded to the Si center. D. functional theory (DFT) calculations provide a mechanistic interpretation consisting of a Si-H homolytic cleavage and subsequent rebound to the Si-centered radical. In the experiment, the researchers used Indium(III) bromide(cas: 13465-09-3Synthetic Route of Br3In)

Indium(III) bromide(cas: 13465-09-3) is used as a catalyst to produce dithioacetals when unactivated alkynes react with thiols and fields such as optics and microelectronics that utilize semiconductor technology have wide uses for indium in high-performing solar cells.Synthetic Route of Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Application of 1779-49-3In 2019 ,《Rhodium(III) vs. cobalt(III): a mechanistically distinct three-component C-H bond addition cascade using a Cp*RhIII catalyst》 appeared in Chemical Communications (Cambridge, United Kingdom). The author of the article were Li, Ruirui; Ju, Cheng-Wei; Zhao, Dongbing. The article conveys some information:

Three-component C-H bond additions across two different coupling partners remain underdeveloped. Herein, we report the first three-component RhIII-catalyzed C-H bond additions to a wide range of dienes and aldehydes. Our method constitutes a complementary access with Ellman’s CoIII-catalytic system to homoallylic alcs. The results came from multiple reactions, including the reaction of 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