Month: October 2022

《Synthesis, biological evaluation, and modeling studies of 1,3-disubstituted cyclobutane-containing analogs of combretastatin A4》 was published in Journal of Molecular Structure in 2020. These research results belong to Malashchuk, Andrii; Chernykh, Anton V.; Hurmach, Vasyl V.; Platonov, Maxim O.; Onopchenko, Oleksandra; Zozulya, Sergey; Daniliuc, Constantin G.; Dobrydnev, Alexey V.; Kondratov, Ivan S.; Moroz, Yuriy S.; Grygorenko, Oleksandr O.. Computed Properties of C9H11BrO3 The article mentions the following:

With the aim of circumventing the adverse cis/trans-isomerization of combretastatin A4 (CA4), a naturally occurring tumor-vascular disrupting agent, novel CA4 analogs, e.g., I, bearing 1,3-disubstituted cyclobutane moiety instead of the cis-stilbene unit of the parent compd was designed. The corresponding cis and trans cyclobutane-containing derivatives were prepared as pure diastereomers. The structure of the target compounds was confirmed by X-ray diffraction study. The title compounds were evaluated for their cytotoxic properties in human cancer cell lines HepG2 (hepatocarcinoma) and SK-N-DZ (neuroblastoma), and the overall activity was found in micromolar range. Mol. docking studies and mol. dynamics simulation within the colchicine binding site of tubulin were in good agreement with the obtained cytotoxicity data.1-Bromo-3,4,5-trimethoxybenzene(cas: 2675-79-8Computed Properties of C9H11BrO3) was used in this study.

1-Bromo-3,4,5-trimethoxybenzene(cas: 2675-79-8) is an important raw material and intermediate used in organic synthesis, pharmaceuticals, agrochemicals and dyestuff.Computed Properties of C9H11BrO31-Bromo-3,4,5-trimethoxybenzene can be used to synthesize N,N′-diarylated indolo[3,2-b]carbazole derivatives, which can find applications in electrophotography.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《BF3·OEt2-promoted tandem Meinwald rearrangement and nucleophilic substitution of oxiranecarbonitriles》 was published in Organic & Biomolecular Chemistry in 2020. These research results belong to Xu, Chuangchuang; Xu, Jiaxi. Application In Synthesis of o-Bromobenzaldehyde The article mentions the following:

Tandem Meinwald rearrangement and nucleophilic substitution of oxiranenitriles was realized. Arylacetic acid derivatives were readily synthesized from 3-aryloxirane-2-carbonitriles with amines, alcs., or water in the presence of boron trifluoride under microwave irradiation, and the designed synthetic strategy includes introducing a cyano leaving group into arylepoxides and capturing the in-situ generated toxic cyanide with boron trifluoride, making the reaction efficient, safe and environmentally benign. The reaction occurred through an acid-promoted Meinwald rearrangement, producing arylacetyl cyanides, followed by an addition-elimination process with nitrogen or oxygen-containing nucleophilic amines, alcs. or water. The current method provided a new application of the tandem Meinwald rearrangement. In the part of experimental materials, we found many familiar compounds, such as o-Bromobenzaldehyde(cas: 6630-33-7Application In Synthesis of o-Bromobenzaldehyde)

o-Bromobenzaldehyde(cas: 6630-33-7) is used in L-threonine aldolase-catalyzed enantio/diastereoselective aldol reactions.Application In Synthesis of o-BromobenzaldehydeSynthetic applications of o-Bromobenzaldehyde include: synthesis of aza-fused polycyclic quinolines through copper-catalyzed cascade reaction, preparation of 1-substituted indazoles by CuI-catalyzed coupling with N-aryl hydrazides.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Discovery of a new class of PROTAC BRD4 degraders based on a dihydroquinazolinone derivative and lenalidomide/pomalidomide》 was written by Zhang, Fangqing; Wu, Zhenwei; Chen, Pan; Zhang, Jian; Wang, Tao; Zhou, Jinpei; Zhang, Huibin. Safety of Ethyl 5-bromovalerate And the article was included in Bioorganic & Medicinal Chemistry in 2020. The article conveys some information:

Synthesis of dihydroquinazolinone-lenalidomide/pomalidomide derivatives I [n=1,2,3,4,5,6], II [n=4,5,6] and III [X = CH2, CO; n=0,1,2,3] and biol. evaluation of PROTAC BRD4 degraders was discovered. Gratifyingly, several compounds showed excellent inhibitory activity against BRD4 and high anti-proliferative potency against human monocyte lymphoma cell line THP-1. Especially, compound III [X = CO; n=0] (BRD4 BD1, IC50 = 41.8 nM) achieved a submicromolar IC50 value of 0.81μM in inhibiting the growth of THP-1 cell line, and was 4 times more potent than compound IV. Moreover, the mechanism study established that III [X = CO; n=0] could effectively induced the degradation of BRD4 protein and suppression of c-Myc. The experimental process involved the reaction of 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

《Molecular Vises for Precisely Positioning Ligands near Catalytic Metal Centers in Metal-Organic Frameworks》 was written by Yan, Wei; Li, Shenhui; Yang, Tao; Xia, Yucong; Zhang, Xinrui; Wang, Chao; Yan, Zier; Deng, Feng; Zhou, Qianghui; Deng, Hexiang. Quality Control of Tris(4-bromophenyl)amine And the article was included in Journal of the American Chemical Society in 2020. The article conveys some information:

The construction of a mol. vise by pairing a tritopic phenylphosphorus(III) linker and a monotopic linker in opposite positions within a metal-organic framework is reported. The angle between these linkers at metal sites is fixed upon changing the functionality in the monotopic linker, while the distance between them is precisely tuned. This distance within the mol. vise is accurately measured by 1H-31P solid-state NMR spectroscopy. This unveils the impact of the distance on catalytic performance without interference from electrostatic effects or changes in the angle of the ligand, which is unprecedented in classic organometallic complexes. In the experimental materials used by the author, we found Tris(4-bromophenyl)amine(cas: 4316-58-9Quality Control of Tris(4-bromophenyl)amine)

In other references, Tris(4-bromophenyl)amine(cas: 4316-58-9) is often used in the synthesis of porous luminescent covalent–organic polymers (COPs)Quality Control of Tris(4-bromophenyl)amine

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Nickel/Photo-Cocatalyzed Asymmetric Acyl-Carbamoylation of Alkenes》 was written by Fan, Pei; Lan, Yun; Zhang, Chang; Wang, Chuan. Recommanded Product: 1779-49-3 And the article was included in Journal of the American Chemical Society in 2020. The article conveys some information:

An unprecedented asym. acyl-carbamoylation of pendant alkenes tethered on aryl carbamic chlorides with both aliphatic and aromatic aldehydes has been developed via the cooperative catalysis of a chiral nickel-PHOX complex and tetrabutylammonium decatungstate. This reaction represents the first example of merging hydrogen-atom-transfer photochem. and asym. transition metal catalysis in difunctionalization of alkenes. Using this protocol, a variety of oxindoles bearing a challenging quaternary stereogenic center are furnished under mild conditions in highly enantioselective manner. In the experiment, the researchers used Methyltriphenylphosphonium bromide(cas: 1779-49-3Recommanded Product: 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.Recommanded Product: 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《A nicotinamide phosphoribosyltransferase-GAPDH interaction sustains the stress-induced NMN/NAD+ salvage pathway in the nucleus》 was written by Grolla, Ambra A.; Miggiano, Riccardo; Marino, Daniele Di; Bianchi, Michele; Gori, Alessandro; Orsomando, Giuseppe; Gaudino, Federica; Galli, Ubaldina; Del Grosso, Erika; Mazzola, Francesca; Angeletti, Carlo; Guarneri, Martina; Torretta, Simone; Calabro, Marta; Boumya, Sara; Fan, Xiaorui; Colombo, Giorgia; Travelli, Cristina; Rocchio, Francesca; Aronica, Eleonora; Wohlschlegel, James A.; Deaglio, Silvia; Rizzi, Menico; Genazzani, Armando A.; Garavaglia, Silvia. Quality Control of 8-Bromooctanoic acid And the article was included in Journal of Biological Chemistry in 2020. The article conveys some information:

All cells require sustained intracellular energy flux, which is driven by redox chem. at the subcellular level. NAD+, its phosphorylated variant NAD(P)+, and its reduced forms NAD(P)/NAD(P)H are all redox cofactors with key roles in energy metabolism and are substrates for several NAD-consuming enzymes (e.g. poly(ADP-ribose) polymerases, sirtuins, and others). The nicotinamide salvage pathway, constituted by NMN adenylyltransferase (NMNAT) and nicotinamide phosphoribosyltransferase (NAMPT), mainly replenishes NAD+ in eukaryotes. However, unlike NMNAT1, NAMPT is not known to be a nuclear protein, prompting the question of how the nuclear NAD+ pool is maintained and how it is replenished upon NAD+ consumption. In the present work, using human and murine cells; immunoprecipitation, pulldown, and surface plasmon resonance assays; and immunofluorescence, small-angle X-ray scattering, and MS-based analyses, we report that GAPDH and NAMPT form a stable complex that is essential for nuclear translocation of NAMPT. This translocation furnishes NMN to replenish NAD+ to compensate for the activation of NAD-consuming enzymes by stressful stimuli induced by exposure to H2O2 or S-nitrosoglutathione and DNAdamage inducers. These results indicate that by forming a complex with GAPDH, NAMPT can translocate to the nucleus and thereby sustain the stress-induced NMN/NAD salvage pathway. In the part of experimental materials, we found many familiar compounds, such as 8-Bromooctanoic acid(cas: 17696-11-6Quality Control 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.Quality Control of 8-Bromooctanoic acid

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Regio- and Enantioselective Ni-Catalyzed Formal Hydroalkylation, Hydrobenzylation, and Hydropropargylation of Acrylamides to α-Tertiary Amides》 was written by Shi, Lou; Xing, Ling-Ling; Hu, Wen-Bo; Shu, Wei. Formula: C6H11BrO2 And the article was included in Angewandte Chemie, International Edition in 2021. The article conveys some information:

The development of enantioselective alkyl-alkyl cross-couplings with coinstantaneous formation of a stereogenic center without the use of sensitive organometallic species is attractive yet challenging. Herein, we report the intermol. regio- and enantioselective formal hydrofunctionalizations of acrylamides, forging a stereogenic center α-position to the newly formed Csp3-Csp3 bond for the first time. The use of a newly developed chiral ligand enables the electronically-reversed formal hydrofunctionalizations, including hydroalkylation, hydrobenzylation, and hydropropargylation, offering an efficient way to access diverse enantioenriched amides with a tertiary α-stereogenic carbon center which is facile to racemize. This operationally simple protocol allows for the anti-Markovnikov enantioselective hydroalkylation, and unprecedented hydrobenzylation, hydropropargylation under mild conditions with excellent functional group compatibility, delivering a wide range of amides with excellent levels of enantioselectivity. The experimental process involved the reaction of Ethyl 4-bromobutyrate(cas: 2969-81-5Formula: C6H11BrO2)

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.Formula: C6H11BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Heck, Matthias; Botha, Carlo; Wilhelm, Manfred; Hirschberg, Valerian published their research in Macromolecular Rapid Communications in 2021. The article was titled 《One-Pot Synthesis of Alternating (Ultra-High Molecular Weight) Multiblock Copolymers via a Combination of Anionic Polymerization and Polycondensation》.Quality Control of 1,4-Bis(bromomethyl)benzene The article contains the following contents:

This article presents a fast, straightforward synthesis approach to polymerize alternating multiblock copolymers, ultra-high mol. weight (UHMW) (homo)polymers as well as precursors for complex macromol. topologies such as comb or barbwire architectures. The one-pot synthesis strategy proposed in this work is based on anionic polymerization via a bifunctional initiator and the subsequent linking of macro dianions with a bifunctional linker, addnl. overcoming the limitations associated with the monomer reactivity. Thus, the synthetic route guarantees the repeating size of polymer blocks and an equal distribution of functional groups in precursors for complex topologies. Dianions of polystyrene (PS), polyisoprene-b-polystyrene-b-polyisoprene, and poly-2-vinylpyridine-b-polystyrene-b-poly-2-vinylpyridine are linked with α,α’-dibromo-para-xylene to UHMW and multiblock copolymers. Multiblock copolymers with on average up to 50 well-defined alternating A and B blocks are accessible within 15 min. The experimental part of the paper was very detailed, including the reaction process of 1,4-Bis(bromomethyl)benzene(cas: 623-24-5Quality Control of 1,4-Bis(bromomethyl)benzene)

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) belongs to organobromine compounds. 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. Quality Control of 1,4-Bis(bromomethyl)benzene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Boldt, Andrew M.; Dickinson, Sidney I.; Ramirez, Jonathan R.; Benz-Weeden, Anna M.; Wilson, David S.; Stevenson, Susan M. published their research in Organic & Biomolecular Chemistry in 2021. The article was titled 《Reactions of benzyltriphenylphosphonium salts under photoredox catalysis》.HPLC of Formula: 1129-28-8 The article contains the following contents:

The development of benzyltriphenylphosphonium salts RCH2P+(C6H5)3X- (R = 3-methylphenyl, 4-bromophenyl, 3,5-dimethylphenyl, etc.; X = Cl, Br) as alkyl radical precursors using photoredox catalysis is described. Depending on substituents, the benzylic radicals may couple to form C-C bonds or abstract a hydrogen atom to form C-H bonds. A natural product, brittonin A, was also synthesized using this method. In addition to this study using Methyl 3-(bromomethyl)benzoate, there are many other studies that have used Methyl 3-(bromomethyl)benzoate(cas: 1129-28-8HPLC of Formula: 1129-28-8) was used in this study.

Methyl 3-(bromomethyl)benzoate(cas: 1129-28-8) 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. Alkyl bromides are mainly used as alkylating agents and also find application as a solvent to extract oil from seeds and wool. HPLC of Formula: 1129-28-8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Quertinmont, Jean; Beaujean, Pierre; Stiennon, Julien; Aidibi, Youssef; Leriche, Philippe; Rodriguez, Vincent; Sanguinet, Lionel; Champagne, Benoit published their research in Journal of Physical Chemistry B in 2021. The article was titled 《Combining Benzazolo-Oxazolidine Twins toward Multi-state Nonlinear Optical Switches》.Computed Properties of C4H2Br2S The article contains the following contents:

Mol. switches are chem. compounds exhibiting the possibility of reversible transformations between their different forms accompanied by a modification in their properties. Among these, switching of multi-addressable Benzazolo-OXazolidines (BOXs) from a closed form to an open form results in drastic modifications in their linear and nonlinear optical properties. Here, we target mols. containing two identical BOX units (DiBOX) connected by different π-conjugated linkers, and we combine synthesis, UV/visible absorption, and hyper-Rayleigh scattering (HRS) measurements, together with d. functional theory (DFT) calculations Three derivatives have been considered, which differ by the linker: (i) a bithiophene moiety (Bt), (ii) two 3,4-ethylenedioxythiopene (EDOT) units, and (iii) a triad composed of an EDOT-thiophene-EDOT sequence (TtO). As a matter of fact, these systems can adopt three states (CF-CF, POF-POF, and CF-POF) depending on the closed form (CF) or the protonated open form (POF) of each BOX unit. Despite chem. equivalence, stepwise switching of such systems under the addition of a chem. acid or an oxidant has been exptl. evidenced for two of them (DiBOX-Bt and DiBOX-TtO). Then, DFT calculations show that the first BOX opening leads to the formation of a push-pull π-conjugated segment, exhibiting a huge increase in the first hyperpolarizability (β) and a bathochromic shift with respect to the fully closed form. On the contrary, the second BOX opening induces not only a slight bathochromic shift but also a reduction in their β values conferring the great and uncommon abilities to modulate their linear and nonlinear properties over three discrete levels. Among these results, those on DiBOX-Bt agree with the exptl. data obtained by HRS measurements and further shed light on their structure-property relationship. The results came from multiple reactions, including the reaction of 2,5-Dibromothiophene(cas: 3141-27-3Computed Properties of C4H2Br2S)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used in the preparation of soluble α,ω-diformyl-a-oligothiophenes.Computed Properties of C4H2Br2S

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary