Author: Jessica.F

Computed Properties of C4H7BrO2In 2019 ,《A new quinoline-derived highly-sensitive fluorescent probe for the detection of hydrazine with excellent large-emission-shift ratiometric response》 appeared in Talanta. The author of the article were Wu, Qingqing; Zheng, Jianlu; Zhang, Wencui; Wang, Jianbo; Liang, Wenlang; Stadler, Florian J.. The article conveys some information:

Hydrazine is an important industrial material yet highly toxic and extremely harmful to people’s health when over-exposed in the environment, thus monitoring hydrazine is of great significance. A novel highly fluorescent fluorophore BQ-OH, based on hydroxyl- and benzo[d]oxazole-substituted quinoline structure, was synthesized and esterified with 4-bromobutyric acid to afford a fluorescent probe BQABr for the selective detection of hydrazine. The probe follows SN2(nucleophilic substitution)-cyclization sensing mechanism with remarkable response, excellent sensitivity and selectivity. Spectra experiments in aqueous solutions demonstrated that BQABr exhibited an excellent ratiometric fluorescence response toward hydrazine with 2 well separated emission bands before/after sensing reaction. Emission peak shifted over 130 nm from 387 nm to 521 nm, and unexpectedly outstanding ratio signal enhancement over 3000-fold was achieved. Due to the large spectra response, a very low detection limit of 5.8 nM (0.19 ppb) was obtained. Selectivity experiment was performed, showing BQABr had nearly no spectra response to other possible disturbing analytes. The probe-coated test papers were fabricated and successfully applied to detect gaseous hydrazine. Also, potential application for the detection of hydrazine in both environmental samples and biol. samples (living cells) was demonstrated.4-Bromobutanoic acid(cas: 2623-87-2Computed Properties of C4H7BrO2) was used in this study.

4-Bromobutanoic acid(cas: 2623-87-2) belongs to carboxylic acids. The chief chemical characteristic of the carboxylic acids is their acidity. They are generally more acidic than other organic compounds containing hydroxyl groups but are generally weaker than the familiar mineral acids (e.g., hydrochloric acid, HCl, sulfuric acid, H2SO4, etc.).Computed Properties of C4H7BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Safety of 1,4-Bis(bromomethyl)benzeneIn 2020 ,《Synthesis and properties of a stimulus-responsive block polymer》 was published in RSC Advances. The article was written by Wang, B.; Liu, F. Q.. The article contains the following contents:

In this study, the synthesis of small mols. and use of an improved “”one-pot”” method to synthesize the reversible addition-fragmentation chain transfer polymerization (RAFT) reagents have been reported. By comparing with the RAFT reagents synthesized by the traditional “”step-by-step”” method, it was observed that the reagents synthesized by the two methods had the same structure, however, the improved “”one-pot”” preparation method results in a significantly higher yield. Subsequently, two different macromol. CTA segments (PVP-CTA-PVP and PDMAEMA-CTA-PDMAEMA) were prepared by RAFT polymerization, followed by the synthesis of the block polymer PDMAEMA-b-PVP-CTA-PVP-b-PDMAEMA. Through FITR, NMR, GPC and DLS anal. of the block polymer, it was observed that the isotacticity gradually became dominant as the d.p. increased. Further, using NMR spectroscopy to study the effect of pH on the block polymer, the ionization degree of the synthesized polymer in the tumor tissue environment was observed to range between 86.32% to 99.50%, which proved that the synthesized polymers exhibit significant prospects in the medical application. In the experimental materials used by the author, we found 1,4-Bis(bromomethyl)benzene(cas: 623-24-5Safety of 1,4-Bis(bromomethyl)benzene)

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) 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. Safety of 1,4-Bis(bromomethyl)benzene Due to the reactivity of bromide, they are used as potential precursors or important intermediates in organic synthesis.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Visible Light-Mediated Direct C-H Aroylation and Alkylation of Heteroarenes》 were Chang, Rui; Fang, Jie; Chen, Jian-Qiang; Liu, Dan; Xu, Guo-Qiang; Xu, Peng-Fei. And the article was published in ACS Omega in 2019. SDS of cas: 14660-52-7 The author mentioned the following in the article:

Herein, we describe the photocatalytic generation of nucleophilic aroyl radicals from simple aroyl chlorides as a universal and efficient cross-coupling strategy for the direct aroylation of heteroarenes. Furthermore, visible light-mediated direct alkylation of heteroarenes has also been achieved using unactivated bromoalkanes as radical precursors. These two strategies feature high functional group tolerance, exclusive regioselectivity for reaction at the more electrophilic position of heteroarenes, easily accessible substrates, and mild reaction conditions. Moreover, mechanism studies of two reactions are carried out to support our hypotheses. After reading the article, we found that the author used Ethyl 5-bromovalerate(cas: 14660-52-7SDS of cas: 14660-52-7)

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.SDS of cas: 14660-52-7

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Pd(CH3CN)2Cl2/pipecolinic acid as a highly efficient catalytic system for Suzuki-Miyaura cross-coupling reaction of bromoaryl carboxylic acids in water》 were Li, Xiaogang; Zhang, Wenbin; Fu, Leiqing; Guo, Mengping. And the article was published in Catalysts in 2019. Application of 586-76-5 The author mentioned the following in the article:

In this study, a convenient and highly efficient catalytic system for the Suzuki-Miyaura coupling reaction was investigated under mild conditions. A combination of Pd(CH3CN)2Cl2 and pipecolinic acid showed excellent catalytic performance and afforded high turnover numbers; turnover numbers were up to 4.9 × 105 for the coupling reaction of 4-bromobenzoic acid and tetraphenylboron sodium. The catalytic system was also effective for the indexes of 4-bromobenzoic acid, and high turnover numbers were obtained. In the part of experimental materials, we found many familiar compounds, such as 4-Bromobenzoic acid(cas: 586-76-5Application of 586-76-5)

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. 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.Application of 586-76-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Direct C-H Arylation of Aldehydes by Merging Photocatalyzed Hydrogen Atom Transfer with Palladium Catalysis》 was published in ACS Catalysis in 2020. These research results belong to Wang, Lu; Wang, Ting; Cheng, Gui-Juan; Li, Xiaobao; Wei, Jun-Jie; Guo, Bin; Zheng, Caijuan; Chen, Guangying; Ran, Chongzhao; Zheng, Chao. Application of 402-43-7 The article mentions the following:

Herein, we report that merging palladium catalysis with hydrogen atom transfer (HAT) photocatalysis enabled direct arylations and alkenylations of aldehyde C-H bonds, facilitating visible light-catalyzed construction of a variety of ketones. Tetrabutylammonium decatungstate and anthraquinone were found to act as synergistic HAT photocatalysts. D. functional theory calculations suggested a Pd0-PdII-PdIII-PdI-Pd0 pathway and revealed that regeneration of the Pd0 catalyst and the photocatalyst occurs simultaneously in the presence of KHCO3. This regeneration features a low energy barrier, promoting efficient coupling of the palladium catalytic cycle with the photocatalytic cycle. The work reported herein suggests great promise for further applications of HAT photocatalysis in palladium-catalyzed cross-coupling and C-H functionalization reactions to be successful. The experimental part of the paper was very detailed, including the reaction process of 1-Bromo-4-(trifluoromethyl)benzene(cas: 402-43-7Application of 402-43-7)

1-Bromo-4-(trifluoromethyl)benzene(cas: 402-43-7) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals.Application of 402-43-7 The most pervasive is the naturally produced bromomethane.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Stanazolol derived ELISA as a sensitive forensic tool for the detection of multiple 17α-methylated anabolics》 was written by Huml, Lukas; Havlova, Dominika; Longin, Ondrej; Stankova, Eliska; Holubova, Barbora; Kuchar, Martin; Prokudina, Elena; Rottnerova, Zdenka; Zimmermann, Tomas; Drasar, Pavel; Lapcik, Oldrich; Jurasek, Michal. Formula: C7H13BrO2 And the article was included in Steroids in 2020. The article conveys some information:

Two valuable forensic tools based on enzyme-linked immunoassays (ELISAs) for the anal. of 17α-methylated steroids were developed using haptens of stanazolol and its conjugates with biotin. Haptens containing terminal carboxylic group were conjugated to bovine serum albumin (BSA), rabbit serum albumin (RSA) or ovalbumin (OVA). Eight batches of antisera (RAbs) obtained by immunization of rabbits were tested in an indirect competitive ELISA system using immobilization of RSA conjugate (RSA/hapten) and competitor immobilization of the biotinylated conjugate (AB-ELISA) to avidin (avidin/hapten). The best results were achieved with the RAb 212 antibodies in RSA/ST-3 and avidin/ST-10 assembled variants. For the RSA/ST-3 system, an IC50 of 0.3 ng/mL and a detection limit of 0.02 ng/mL were measured. In case of avidin/ST-10 variant, IC50 was of 3.9 ng/mL and a detection limit of 0.57 ng/mL were obtained. The effect of solvent was tested as well as the stability of coated microtiter plates over four-month period. The cross-reactivity of the developed assays with other anabolic steroids was tested and high sensitivity towards 17α-methylated steroids was observed RSA/ST-3 assay showed significant cross-reactivity with 17α-methyltestosterone (81.2%), oxymetholone (30.4%), methandienone (10.0%) and Me dihydrotestosterone (7.7%). Similarly, in the avidin/ST-10 assay, 17α-methyltestosterone (34.5%), mestanolone (32.1%), oxymetholone (22.7%), methandienone (14.2%), 9-dehydromethyltestosterone (12.5%) and oxandrolone (1.2%) exhibited high cross-reactivity. The functionality of the developed systems was verified by the successful identification of a series of 17α-methylated anabolic steroids in a set of real samples including pharmaceutical preparations seized by the Police of the Czech Republic on the black market. In the experimental materials used by the author, we found Ethyl 5-bromovalerate(cas: 14660-52-7Formula: C7H13BrO2)

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.Formula: C7H13BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Wholly Visible-Light-Responsive Host-Guest Supramolecular Gels Based on Methoxy Azobenzene and β-Cyclodextrin Dimers》 was written by Yan, Hongchao; Qiu, Yuan; Wang, Jing; Jiang, Qian; Wang, Hong; Liao, Yonggui; Xie, Xiaolin. Formula: C6H12Br2 And the article was included in Langmuir in 2020. The article conveys some information:

Much attention has been paid to construct photoresponsive host-guest supramol. gels; however, red-shifting the responsive wavelength remains a formidable challenge. Here, a wholly visible-light-responsive supramol. gel was fabricated through the host-guest interaction between a β-cyclodextrin (β-CD) dimer and a tetra-ortho-methoxy-substituted azobenzene (mAzo) dimer (binary gelator) in DMSO/H2O (V/V = 8/2). The min. gelation concentration of the low-mol.-weight binary gelator was 6 wt % measured via the tube inversion method. The substituted methoxy groups shifted the responsive wavelengths of trans-mAzo and cis-mAzo to the green and blue light regions, resp. The host-guest interaction between mAzo and β-CD as the driving force for gelation was confirmed using the 1H-NMR and 2D 1H NOESY spectra. The supramol. gel showed good self-supporting ability with a storage modulus higher than 104 Pa. The release of Rhodamine B loaded in the gel as a model drug could be controlled by green light irradiation We envisioned the potential applications of the wholly visible-light-responsive supramol. compounds ranging from biomedical materials to smart materials. In the experimental materials used by the author, we found 1,6-Dibromohexane(cas: 629-03-8Formula: C6H12Br2)

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.Formula: C6H12Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Tandem Condensation-Hydrogenation to Produce Alkylated Nitriles Using Bifunctional Catalysts: Platinum Nanoparticles Supported on MOF-Derived Carbon》 was written by Huang, Ao; Nie, Renfeng; Zhang, Biying; Pei, Yuchen; Chen, Minda; Behera, Ranjan; Yu, Jiaqi; Luan, Xuechen; Hunter, Nicholas T.; Ke, Ming; Huang, Wenyu. Product Details of 6630-33-7 And the article was included in ChemCatChem in 2020. The article conveys some information:

Tandem catalysis, which allows multiple steps of a reaction to take place without the need for separation and purification, is highly desired for the design of efficient and environmentally-friendly chem. processes. Herein, the pyrolysis of UiO-66-NH2, an amino-functionalized metal-organic framework, produces nitrogen-rich carbon-ZrO2 composite (CN-ZrO2). This composite is rich in basic sites and effectively catalyzes the Knoevenagel condensation reaction. After loading Pt nanoparticles onto this composite support, a tandem catalyst (Pt/CN-ZrO2) is produced to be capable of the one-step Knoevenagel condensation-hydrogenation reaction to produce an alpha-alkylated nitrile. The tandem catalyst exhibits >99% aldehyde conversion and >99% selectivity toward alpha-alkylated nitrile under 1 MPa H2 at 80°C. This catalyst could be reused for five times in the presence of malononitrile without significant deactivation and is versatile for one-step condensation-hydrogenation of various aldehydes. The good performance of Pt/CN-ZrO2 could be ascribed to the synergistic interaction between Pt and CN-ZrO2 composite supports that lead to the appropriate hydrogenation activity of supported Pt nanoparticles. The results came from multiple reactions, including the reaction of o-Bromobenzaldehyde(cas: 6630-33-7Product Details of 6630-33-7)

o-Bromobenzaldehyde(cas: 6630-33-7) is used in L-threonine aldolase-catalyzed enantio/diastereoselective aldol reactions.Product Details of 6630-33-7It is also used in L-threonine aldolase-catalyzed enantio and diastereoselective aldol reactions. Further, it reacts with trichloromethane to prepare 1-(2-bromo-phenyl)-2,2,2-trichloro-ethanol.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Lu, Xu; Kawazu, Ryohei; Song, Jizhou; Yoshigoe, Yusuke; Torigoe, Takeru; Kuninobu, Yoichiro published their research in Organic Letters in 2021. The article was titled 《Regioselective C-H Trifluoromethylation of Aromatic Compounds by Inclusion in Cyclodextrins》.Related Products of 626-40-4 The article contains the following contents:

A regioselective radical C-H trifluoromethylation of aromatic compounds was developed using cyclodextrins (CDs) as additives. The C-H trifluoromethylation proceeded with high regioselectivity to afford the product in good yield, even on the gram scale. In the presence of CDs, some substrates underwent a single trifluoromethylation selectively, whereas mixtures of single- and double-trifluoromethylated products were formed in the absence of the CD. 1H NMR experiments indicated that the regioselectivity was controlled by the inclusion of a substrate inside the CD cavity. After reading the article, we found that the author used 3,5-Dibromoaniline(cas: 626-40-4Related Products of 626-40-4)

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring.Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (NClH2).Related Products of 626-40-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Fusheng; Lin, Shuangjie; Li, Xiyu; Shi, Lei published their research in Synthesis in 2021. The article was titled 《Photocatalytic Generation of π-Allyltitanium Complexes from Butadiene via a Radical Strategy》.SDS of cas: 5437-45-6 The article contains the following contents:

This study reported a conceptually new radical strategy for the photocatalytic generation of π-allyltitanium complexes from butadiene. This novel and environmentally benign strategy enables the direct three-component allylation of carbonyls with 1,3-butadiene and α-bromocarboxylates, providing rapid access to valuable homoallylic alcs. with exceptional regio- and diastereoselectivity control. The experimental process involved the reaction of Benzyl 2-bromoacetate(cas: 5437-45-6SDS of cas: 5437-45-6)

Benzyl 2-bromoacetate(cas: 5437-45-6) belongs to benzyl acetate. Benzyl acetate is a synthetic chemical produced for industry from benzyl alcohol and acetic acid, but is also naturally present in the essential oils of many plants, including jasmine and ylang ylang.SDS of cas: 5437-45-6

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary