Category: bromides-buliding-blocks

《Broadly Applicable Directed Catalytic Reductive Difunctionalization of Alkenyl Carbonyl Compounds》 was published in Chem in 2020. These research results belong to Yang, Tao; Chen, Xianxiao; Rao, Weidong; Koh, Ming Joo. Recommanded Product: (Bromomethyl)cyclopropane The article mentions the following:

Catalytic alkene difuntionalization is a convenient platform for introducing complexity in mols. and has wide applications in organic synthesis. Yet a compelling challenge that remains to be solved is the regioselective insertion of two highly functionalized carbon-based moieties, derived from stable and readily available organohalide electrophiles without the need for pre-synthesized organometallic reagents, across C=C bonds in unactivated alkyl-substituted alkenes. That catalytic amounts of an inexpensive Ni-based catalyst, in combination with a readily recyclable 8-aminoquinoline directing group, promotes efficient and site-selective addition of two different organohalides (iodides and bromides) across aliphatic alkenes under mild reductive conditions. Compared to previous studies, this protocol exhibits broad and complementary functional group tolerance that extends to aryl-alkylation, alkenyl-alkylation, and dialkylation transformations. The utility of the strategy is demonstrated through concise synthesis of biol. active mols. Kinetic studies and other control experiments shed further light on the mechanistic underpinnings of the multicomponent reaction. In the experimental materials used by the author, we found (Bromomethyl)cyclopropane(cas: 7051-34-5Recommanded Product: (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.Recommanded Product: (Bromomethyl)cyclopropane

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Chen, Yu; Panek, James S. published their research in Tetrahedron in 2021. The article was titled 《Highly regio- and diastereoselective synthesis of bis-triazolines》.SDS of cas: 6630-33-7 The article contains the following contents:

A highly stereo- and regioselective homodimerization of chiral azido-esters was achieved by a 1,3-dipolar cycloaddition on chiral (E)-Me 4-azido-6-methoxy-5-methyl-6-phenylhex-2-enoates. Both 4,5-syn and 4,5-anti allylic azides could be used effectively to access corresponding bis-triazoline dimers such as I [X = 2-Br, 2-I, 3-Br; n = 0, 1] by this reproducible method. Structural conformation of a representative dimer was established by X-ray crystal anal. The experimental process involved the reaction of o-Bromobenzaldehyde(cas: 6630-33-7SDS of cas: 6630-33-7)

o-Bromobenzaldehyde(cas: 6630-33-7) is used in L-threonine aldolase-catalyzed enantio/diastereoselective aldol reactions.SDS of cas: 6630-33-7It is a key starting material in the total synthesis of an anticancer agent, (-)-taxol.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Conjugated polymer self-assembled with graphene: Synthesis and electrochemical 1-hydroxypyrene sensor》 was published in Polymer in 2020. These research results belong to Pang, Yuehong; Yang, Nianci; Shen, Xiaofang; Zhang, Yi; Feng, Liheng. COA of Formula: C14H8Br2 The article mentions the following:

Urinary 1-hydroxypyrene (1-OHP), one of the metabolite of polycyclic aromatic hydrocarbons (PAHs), has been extensively applied as a biomarker of animals and human exposure to PAHs. Herein, we synthesized a novel conjugated polymer poly-8-methoxy-7-methyl-5-(10-anthracen-9-yl)quinolone (PMMAYQ) using Suzuki coupling reaction, and then fabricated a homogeneous PMMAYQ/grahene multilayer film via layer-by-layer self-assembly technique and applied for electrochem. sensing of 1-OHP. Under the optimal conditions, {PMMAYQ-Graphene}16 modified glass carbon electrode exhibited excellent response for detection of 1-OHP. A linear range from 0.5 to 120 nM was obtained with a low detection limit of 0.07 nM (S/N = 3) and a sensitivity of 0.5539μA/μM. The electrochem. sensor exhibited excellent stability, accepted repeatability, and good selectivity. The developed method was employed for determination of 1-OHP in human urine samples and recoveries in the range of 95.6%-107.1% were achieved. The experimental process involved the reaction of 9,10-Dibromoanthracene(cas: 523-27-3COA of Formula: C14H8Br2)

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.COA of Formula: C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Acylation of 25-hydroxyprotopanaxatriol with aromatic acids increases cytotoxicity》 were Lv, Liyan; Lu, Jincai; Zhang, Hongyu; Wang, Xude; Su, Guangyue; Piao, Huri; Zhao, Yuqing. And the article was published in Fitoterapia in 2019. Product Details of 586-76-5 The author mentioned the following in the article:

20(R)-25-hydroxyprotopanaxadiol (25-OH-PPD) is a natural compound showing a variety of anti-tumor effects. In an attempt to discover a new anti-cancer compound with higher antitumor activities, we designed and synthesized a series of 25-OH-PPD derivatives The cytotoxicity assay of these derivatives towards MCF-7, A549, U87, HO-8901, Hela cancer cell lines and normal IOSE144 cell lines were tested by MTT assay. Results showed that compared with compound 25-OH-PPD, acylated derivatives I [R = 4-ClC6H4, 2-FC6H4, 2,4-F2C6H3, 2-O2NC6H4, 3,5-(O2N)2C6H3] showed strong anticancer activity, and all compounds showed low toxicity or no toxicity for normal cells. In particular, compound I (R = 2,4-F2C6H3) (II) exhibited the best anti-tumor activity in all cancer cell lines (MCF-7, A549, U87, HO-8901, and Hela) with IC50 values of 5.04μM, 1.36μM, 3.24μM, 3.47μM, 4.57μM, resp. Among the five cell lines, all the compounds showed strong inhibition on A549 cells. Further studies showed that II significantly inhibited the proliferation of A549 cells by inducing apoptosis. Our results indicate that II is a potential anticancer inhibitor and provides a theor. basis for further research. In addition to this study using 4-Bromobenzoic acid, there are many other studies that have used 4-Bromobenzoic acid(cas: 586-76-5Product Details of 586-76-5) was used in this study.

4-Bromobenzoic acid(cas: 586-76-5) has been used to study the metabolic fate of 2-,3-and 4-bromo benzoic acids in rat hepatocytes incubation using high temperature liquid chromatography.Product Details of 586-76-5 It was used in bromine-specific detection of the metabolites of 2-,3-and 4-bromobenzoic acid in the urine and bile of rats by inductively coupled plasma mass spectrometry.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Synthesis included an article by Singh, Mala; Singh, Anoop S.; Mishra, Nidhi; Agrahari, Anand K.; Tiwari, Vinod K.. Product Details of 586-76-5. The article was titled 《Trichloroisocyanuric Acid Mediated High-Yielding Synthesis of N-Acylbenzotriazoles under Mild Reaction Conditions》. The information in the text is summarized as follows:

N-Acylbenzotriazoles I (R = C6H5, (E)-CH3(CH2)7CH=CH(CH2)7, furan-2-yl, etc.) are achieved in good yields from the corresponding carboxylic acids RC(O)OH by using only 0.35 equiv of trichloroisocyanuric acid and 1.2 equiv of PPh3. The salient features of the developed reaction path include an economic, facile, base-free, and equally useful method in milligram to gram scale. The results came from multiple reactions, including the reaction of 4-Bromobenzoic acid(cas: 586-76-5Product Details of 586-76-5)

4-Bromobenzoic acid(cas: 586-76-5) has been used in bromine-specific detection of the metabolites of 2-,3-and 4-bromobenzoic acid in the urine and bile of rats by inductively coupled plasma mass spectrometry.Product Details of 586-76-5 It was used to study the metabolic fate of 2-,3-and 4-bromo benzoic acids in rat hepatocytes incubation using high temperature liquid chromatography.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,ChemSusChem included an article by Cao, Qun; Stark, Roderick T.; Fallis, Ian A.; Browne, Duncan L.. HPLC of Formula: 401-55-8. The article was titled 《A Ball-Milling-Enabled Reformatsky Reaction》. The information in the text is summarized as follows:

An operationally simple one-pot one-step mechanochem. Reformatsky reaction using in situ generated organozinc intermediates under neat grinding conditions has been developed. Notable features of this reaction protocol are that it requires no solvent, no inert gases, and no pre-activation of the bulk zinc source. The developed process is demonstrated to have good substrate scope (39-82 % yield) and is effective irresp. of the initial morphol. of the zinc source. In the experiment, the researchers used Ethylbromofluoroacetate(cas: 401-55-8HPLC of Formula: 401-55-8)

Ethylbromofluoroacetate(cas: 401-55-8) is a member of organofluorine compounds. Organofluorine compounds, which have carbon-fluorine bonds, show unique features such as high thermal and chemical stability, high surface activity, no light-absorbing ability, high pharmacological effect, and so on. Owing to their specific characters, they are indispensable chemicals for industry and our daily lives.HPLC of Formula: 401-55-8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《An effective synthesis of ursodeoxycholic acid from dehydroepiandrosterone》 was written by Chen, Wang; Hu, Daihua; Feng, Zili; Liu, Zhaopeng. HPLC of Formula: 1530-32-1This research focused onursodeoxycholic acid preparation Mitsunobu inversion Luche regioselective allyl oxidation; Dehydroepiandrosterone; Synthesis; Ursodeoxycholic acid. The article conveys some information:

A novel synthetic route of producing ursodeoxycholic acid (UDCA, I) was developed through multiple reactions from plant-source dehydroepiandrosterone (DHEA), with a Mitsunobu reaction and regioselective allyl oxidationat as the key steps. The reaction conditions of the key allyl oxidation reaction were also investigated and optimized, including solvent, oxidant and reaction temperature In this novel route for the preparation of UDCA, most of the reaction steps have high conversions and overall yield up to 35% for 8 steps. Since all starting materials are cost-effective, com. available and effectively avoided the risk of animal derived raw materials, this promising synthetic route offers economical and efficient strategies for potential production of UDCA. In the experimental materials used by the author, we found Ethyltriphenylphosphonium bromide(cas: 1530-32-1HPLC of Formula: 1530-32-1)

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. CatOnium ETPB is also used as catalysts in the synthesis of certain organic compounds.HPLC of Formula: 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

HPLC of Formula: 6825-20-3In 2020 ,《Proton Transfer Can Govern Regioselectivity Assisted by Iron Catalysis》 appeared in iScience. The author of the article were Li, Yudong; Fu, Liyan; Jiang, Xiaolin; Zhao, Dongmei; Wang, Hui-Fang; Xia, Chungu; Li, Yuehui. The article conveys some information:

Ortho-selective aromatic C-H functionalization is frequently used in organic synthesis and chem./pharmaceutical industries. However, this reaction relies heavily on the use of directing groups suffering from limited substrate scope and extra steps to put on and remove the directing/protecting groups. Herein authors present the previously neglected concept that enables good to nearly complete selective ortho position. Proton transfer was utilized to tune the electron d. on the aryl ring and determine the positional selectivity of electrophilic substitution. Consistently with deuteration experiments and DFT studies, this work demonstrates that acid-promoted proton transfer directs accelerated ortho-selective halogenation of NH/OH contained aromatic amines/phenols with excellent selectivity (>40 examples; up to 98:2 ortho/para selectivity). The application potential of this Fe-catalyzed method is demonstrated by the convenient synthesis of three alkaloids and tizanidine. This report raises the possibility that proton transfer could serve as the basis of developing new selective C-H functionalization reactions. 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 in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.HPLC of Formula: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Quality Control of 9,10-DibromoanthraceneIn 2022 ,《POSS-based fluorescence sensor for rapid analysis of β-carotene in health products》 appeared in Luminescence. The author of the article were Li, Dan; Zhou, Peipei; Hu, Yufei; Li, Gongke; Xia, Ling. The article conveys some information:

In recent years, fluorescent organic-inorganic hybrid nanomaterials have received much interest as potential fluorescent sensor materials. In this study, fluorescent organic-inorganic hybrid nanomaterials (POSS@ANT) were created using polyhedral oligomeric silsesquioxane as the precursor and 9,10-bromoanthracene as the monomer. The morphol. and composition of POSS@ANT, as well as its pore characteristics and fluorescence properties were studied. POSS@ANT displayed steady fluorescence emission at an excitation wavelength of 374 nm. Next, a β-carotene fluorescence sensor was developed using the capacity of β-carotene to quench the fluorescence of POSS@ANT. The quenching process is linked to acceptor electron transfer and energy transfer, and the sensor has a high selectivity for β-carotene. This β-carotene fluorescence anal. method that we established has a linear range of 0.2-4.3 mg/L and a detection limit of 0.081 mg/L. Finally, it was used to quantify β-carotene in health products, the recovery rate was 91.1-109.9%, the relative standard deviation (RSD) was 2.2-4.3%, and the results were comparable with the results of high-performance liquid chromatog. The approach is reliable and can be used to determine β-carotene in health products. The results came from multiple reactions, including the reaction of 9,10-Dibromoanthracene(cas: 523-27-3Quality Control of 9,10-Dibromoanthracene)

9,10-Dibromoanthracene(cas: 523-27-3) is a dibrominated polycyclic aromatic hydrocarbon (PAH). 9,10-Dibromoanthracene is often used as an energy acceptor and activator in reactions that produce chemiluminescence.Quality Control of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Tang, Qi; Liu, Jing; Wang, Cheng-Bin; An, Lu; Zhang, Hai-Lin; Wang, Yi; Ren, Bing; Yang, Shi-Ping; Liu, Jin-Gang published an article in Nanoscale. The title of the article was 《A multifunctional nanoplatform delivering carbon monoxide and a cysteine protease inhibitor to mitochondria under NIR light shows enhanced synergistic anticancer efficacy》.Electric Literature of C5BrMnO5 The author mentioned the following in the article:

Photoactivated chemotherapy has attracted widespread attention due to its ability to circumvent the shortcomings of hypoxia in tumor tissues compared with traditional photodynamic therapy. In this work, novel multifunctional nanoplatform (1), Ru-inhibitor@TPPMnCO@N-GQDs, was designed and prepared, which was capable of mitochondria-targeted co-delivery of the cysteine protease inhibitor and carbon monoxide (CO) stimulated with an 808 nm near IR (NIR) laser. Nanoplatform (1) was prepared by covalent attachment of a mitochondria-targeted CO donor (TPPMnCO) and a Ru(II)-caged cysteine protease inhibitor (Ru-inhibitor) on the surface of fluorescent N-doped graphene quantum dots (N-GQDs). Nanoplatform (1) preferentially accumulated in the mitochondria of cancer cells and instantly delivered CO and the cysteine protease inhibitor upon 808 nm NIR light irradiation, thus damaging mitochondria and leading to significant in vitro and in vivo anticancer efficacy. In addition, nanoplatform (1) has good biocompatibility and did not exert any toxic side effects on mice during the period of treatment. The targeted subcellular mitochondrial co-delivery of CO and the cysteine protease inhibitor may provide new insights into CO and enzyme inhibitor combined therapies for cancer treatment. The experimental part of the paper was very detailed, including the reaction process of Bromopentacarbonylmanganese(I)(cas: 14516-54-2Electric Literature of C5BrMnO5)

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.Electric Literature of C5BrMnO5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary