Month: November 2022

《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

Jaradat, Ahmad; Zhang, Chengji; Singh, Sachin Kumar; Ahmed, Junaid; Ahmadiparidari, Alireza; Majidi, Leily; Rastegar, Sina; Hemmat, Zahra; Wang, Shuxi; Ngo, Anh T.; Curtiss, Larry A.; Daly, Matthew; Subramanian, Arunkumar; Salehi-khojin, Amin published an article in 2021. The article was titled 《High Performance Air Breathing Flexible Lithium-Air Battery》, and you may find the article in Small.Quality Control of Indium(III) bromide The information in the text is summarized as follows:

Lithium-oxygen (Li-O2) batteries possess the highest theor. energy d. (3500 Wh kg-1), which makes them attractive candidates for modern electronics and transportation applications. In this work, an inexpensive, flexible, and wearable Li-O2 battery based on the bifunctional redox mediator of InBr3, MoS2 cathode catalyst, and Fomblin-based oxygen permeable membrane that enable long-cycle-life operation of the battery in pure oxygen, dry air, and ambient air is designed, fabricated, and tested. The battery operates in ambient air with an open system air-breathing architecture and exhibits excellent cycling up to 240 at the high c.d. of 1 A g-1 with a relative humidity of 75%. The electrochem. performance of the battery including deep-discharge capacity, and rate capability remains almost identical after 1000 cycle in a bending fatigue test. This finding opens a new direction for utilizing high performance Li-O2 batteries for applications in the field of flexible and wearable electronics. The results came from multiple reactions, including the reaction of Indium(III) bromide(cas: 13465-09-3Quality Control of Indium(III) bromide)

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.Quality Control of Indium(III) bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sei, Kento; Wang, Qi; Tokumura, Masahiro; Miyake, Yuichi; Amagai, Takashi published an article in 2021. The article was titled 《Accurate and ultrasensitive determination of 72 parent and halogenated polycyclic aromatic hydrocarbons in a variety of environmental samples via gas chromatography-triple quadrupole mass spectrometry》, and you may find the article in Chemosphere.Quality Control of 9,10-Dibromoanthracene The information in the text is summarized as follows:

Polycyclic aromatic hydrocarbons (PAHs) and their halogenated derivatives (XPAHs) are ubiquitous in various environmental media. Anal. problems, however, make it difficult to accurately determine their concentrations To develop a satisfactory anal. method suitable for a diversity of PAHs and XPAHs in multiple environmental samples, we evaluated three com. anal. columns (DB-5MS, Select PAH, and Rxi-PAH) for better chromatog. separation and optimized the anal. conditions for gas chromatog.-triple quadrupole mass spectrometry (GC-MS/MS). Comparison of the abilities of the columns to sep. peaks revealed that the Rxi-PAH was the best column for both PAH and XPAH analyses. Optimization of anal. conditions for GC-MS/MS resulted in sensitivities for PAHs and XPAHs that were 4.2-fold-2600-fold higher than the sensitivities of GC-high-resolution MS (GC-HRMS) (an example of a traditional anal. method). Although there were no statistically significant differences between the instrumental detection limits (IDLs) of PAHs and XPAHs measured by GC-HRMS, the IDLs of XPAHs were significantly lower than those of PAHs when measured by GC-MS/MS. This difference could be attributed to the unique ionization patterns of XPAHs in the GC-MS/MS anal., which suppressed background noise and increased the anal. sensitivity. Analyses of PAHs and XPAHs in grilled chicken, vehicle exhaust, sea sediment, ambient air, and indoor dust via the anal. method optimized in this study revealed that the proposed method was sufficiently sensitive, comprehensive, and versatile for risk assessment purposes, and could eliminate interferences associated with the co-elution of target PAHs and XPAHs. In the experimental materials used by the author, we found 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,Yang, Hui; Xing, Baoyan; Zhao, Jianguo; Ma, Guibin published an article in Polyhedron. The title of the article was 《Methoxyl-substituted phosphine ligand properties and a case study of formation adducts to indium(III) bromide by DFT calculations》.Formula: Br3In The author mentioned the following in the article:

Six bulky triphenylphosphine ligands containing substituted methoxyl groups (tris(2,4,6-trimethoxyphenyl)phosphine (TMP), tris(2,6-dimethoxyphenyl)phosphine (TDP), tris(o-methoxyphenyl)phosphine (o-Anis3P), tris(p-methoxyphenyl)phosphine (p-Anis3P), tris(m-methoxyphenyl)phosphine (m-Anis3P) and triphenylphosphine (PPh3)) were studied by DFT (d. functional theory) calculations and exptl. solution/solid-state 31P NMR spectroscopy. The basicity and binding ability of these substituted ligands, proven by comparison of structural data with DFT-predicted data, are in the order TMP > TDP > o-Anis3P > p-Anis3P > m-Anis3P > PPh3. Mol. structures for InBr3 with bulky ligands (TMP, TDP, o-Anis3P, p-Anis3P, m-Anis3P and PPh3) were calculated using DFT. P-In bond distances generated from these six optimized mol. structures and the calculated intramol. interaction energies are in agreement with the ligand properties, with strong donation ability for those with the short bond distance; the In-P bond distance from shortest to longest follows a similar trend as predicted by DFT calculations DFT calculations for these adducts show that methoxyl substitution to triphenylphosphine (PPh3) ligands contributed to its electron donor ability resulting in lower P-In bond distances with relatively large bond interaction energies. In the part of experimental materials, we found many familiar compounds, such as Indium(III) bromide(cas: 13465-09-3Formula: 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.Formula: Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Liu, Pei; Zhang, Sheng; Pei, Xiaomei; Song, Binglei; Jiang, Jianzhong; Cui, Zhenggang; Binks, Bernard P. published an article in Soft Matter. The title of the article was 《Recyclable and re-usable smart surfactant for stabilization of various multi-responsive emulsions alone or with nanoparticles》.Electric Literature of C8H15BrO2 The author mentioned the following in the article:

A novel multi-responsive surfactant (abbreviated as N+-8P8-N) was synthesized, in which one octyl trimethylamine group (quaternary ammonium) and one octyl dimethylamine group are connected to a benzene ring through ether bonds. This novel surfactant can stabilize conventional oil-in-water (O/W) emulsions alone, and O/W Pickering emulsions and novel oil-in-dispersion emulsions together with oppositely and similarly charged nanoparticles, resp. In all cases rapid demulsification can be achieved through either pH or CO2/N2 triggers, by which the surfactant is reversibly converted between a normal cationic surfactant form (N+-8P8-N) and a strongly hydrophilic and surface-inactive bola form (N+-8P8-NH+). Notably, the bola form N+-8P8-NH+ dissolves in the aqueous phase alone or together with nanoparticles after demulsification without contamination of the oil phase, and the aqueous phase can be recycled many times triggered by pH or CO2/N2 in accordance with the principle of green chem. This newly designed re-usable smart surfactant is significant for the development of various temporarily stable emulsions, which are extensively applied in emulsion polymerization, new material synthesis, heterogeneous catalysis and oil transportation.8-Bromooctanoic acid(cas: 17696-11-6Electric Literature of C8H15BrO2) was used in this study.

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.Electric Literature of C8H15BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary