Tag: 300-400

Chen, Jinqing; Zhong, Hong; Lv, Haowei; Liu, Ruixia; Wang, Ruihu published an article in 2021. The article was titled 《Regulating Utilization Efficiency of the Photogenerated Charge Carriers by Constructing Donor-π-Acceptor Polymers for Upgrading Photocatalytic CO2 Reduction》, and you may find the article in ChemSusChem.Computed Properties of C14H8Br2 The information in the text is summarized as follows:

Photocatalytic CO2 reduction offers a promising approach for managing global carbon balance. The smooth delivery of the photoexcited electrons to the active sites without the extra photosensitizers is still challenging. Herein, a series of donor-π-acceptor conjugated organic polymers (COPs) were produced using anthracene, cobalt-coordinated bipyridyl, and benzene as donor, acceptor, and π linker units, resp. The introduction of Ph linker significantly improved the activities of photocatalytic CO2 reduction upon visible light illumination. Structure-performance relationship examinations uncovered that donor-π-acceptor structure promotes mobility of charge carriers and utilization efficiency on the catalytically active sites, resulting in high photocatalytic activity and durability for CO2 photoreduction The in-depth insights into the electron transport processes open new perspectives for further optimization and rational design of photoactive polymers with high efficiency for solar-energy conversion.9,10-Dibromoanthracene(cas: 523-27-3Computed Properties of C14H8Br2) was used in this study.

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.Computed Properties of C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ning, Shulin; Zheng, Lianyou; Bai, Ya; Wang, Shutao; Wang, Siyu; Shi, Lingling; Gao, Qiansong; Che, Xin; Zhang, Zhuoqi; Xiang, Jinbao published their research in Tetrahedron in 2021. The article was titled 《Highly selective electroreductive linear dimerization of electron-deficient vinylarenes》.Application of 1530-32-1 The article contains the following contents:

A direct electroreductive dimerization of electron-deficient vinylarenes R1R2C:CR3R4 (R1 = Ph, 4-NCC6H4, pyridin-4-yl, etc., R2 = R3 = R4 = H; R1 = 4-EtO2CC6H4, R2 = Me, Ph, R3 = R4 = H; R1 = 4-MeO2CC6H4, R2 = H, R3 = Me, R4 = H, Me; etc.) for the synthesis of 1,4-diarylbutanes R1R2CH-CR3R4-CR3R4-CHR1R2 as been developed using a simple undivided cell with inexpensive carbon electrodes at room temperature The control and deuterium-labeling experiments of electroreductive dimerization suggest that the hydrogen source comes from the solvent CH3CN. This protocol provides a mild and efficient route for the construction of C-C bond in moderate to good yields with high regioselectivity and broad substrate scope. In the experiment, the researchers used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Application of 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. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Application of 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Photoredox-Catalyzed Stereoselective Synthesis of C-Nucleoside Analogs from Glycosyl Bromides and Hetero-arenes》 was written by Xia, Liwen; Fan, Wenjing; Yuan, Xiang-Ai; Yu, Shouyun. HPLC of Formula: 21085-72-3 And the article was included in ACS Catalysis in 2021. The article conveys some information:

C-nucleosides, analogs of nucleosides by replacing a C-N glycosidic bond with a C-C bond, are potential anticancer or antiviral agents. Synthesis of C-nucleoside analogs, e.g. I, enabled by photoredox-catalyzed radical coupling of glycosyl bromides with non-functionalized hetero-arenes has been described. This strategy features readily available starting materials, mild conditions, good functional group tolerance, and site- and stereoselectivities (α-configuration). A variety of monosaccharides (D-lyxose, D-ribose, L-arabinose, D-glucose, D-mannose, D-glucuronide, and D-fucose), disaccharides (lactose, melibiose, and maltose), and polysaccharide can couple with a series of non-functionalized hetero-arenes, such as purine, benzothiazole, thiazolo-pyridine, benzoxazole, benzimidazole, imidazopyridine, and phenanthridine. Biol. important mols., such as theophylline, famciclovir, ribofuranoside, and adenine, can be glycosylated directly through a C-C bond using this method. Site- and stereoselectivities can be rationalized and predicted by DFT calculations In the experimental materials used by the author, we found (2R,3R,4S,5S,6S)-2-Bromo-6-(methoxycarbonyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate(cas: 21085-72-3HPLC of Formula: 21085-72-3)

(2R,3R,4S,5S,6S)-2-Bromo-6-(methoxycarbonyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate(cas: 21085-72-3) may be used for the synthesis of HMR1098-S-Glucuronide Methyl Ester, a new K-ATP-blocking agent being developed as a drug for prevention of sudden cardiac death.HPLC of Formula: 21085-72-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Visible-Light-Induced Pd-Catalyzed Radical Strategy for Constructing C-Vinyl Glycosides》 was published in Organic Letters in 2020. These research results belong to Li, Ming; Qiu, Yi-Feng; Wang, Cui-Tian; Li, Xue-Song; Wei, Wan-Xu; Wang, Yu-Zhao; Bao, Qiao-Fei; Ding, Ya-Nan; Shi, Wei-Yu; Liang, Yong-Min. COA of Formula: C13H17BrO9 The article mentions the following:

A novel visible-light-induced palladium-catalyzed Heck reaction for bromine sugars and aryl olefins with high regio- and stereochem. selectivity for the preparation of C-glycosyl styrene is described. This reaction takes place in one step at room temperature by using a simple and readily available starting material. This protocol can be scaled up to a wide range of glycosyl bromide donors and aryl olefin substrates. Mechanistic studies indicate that a radical addition pathway is involved. The results came from multiple reactions, including the reaction of (2R,3R,4S,5S,6S)-2-Bromo-6-(methoxycarbonyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate(cas: 21085-72-3COA of Formula: C13H17BrO9)

(2R,3R,4S,5S,6S)-2-Bromo-6-(methoxycarbonyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate(cas: 21085-72-3) may be used for the synthesis of HMR1098-S-Glucuronide Methyl Ester, a new K-ATP-blocking agent being developed as a drug for prevention of sudden cardiac death.COA of Formula: C13H17BrO9

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Titanium complex with an [OSSO]-type bis(phenolate) ligand for ethylene copolymerization with vinyl polar monomer based on group protection》 were Zhu, Yuqiong; Li, Sihan; Liang, Huaqing; Xie, Xiuli; Zhu, Fangming. And the article was published in RSC Advances in 2019. Related Products of 1779-49-3 The author mentioned the following in the article:

The [OSSO]-type bis(phenolate) titanium complex 1 activated by methylaluminoxane (MAO) was tested as a homogeneous catalyst for ethylene coordination copolymerization with protected vinyl polar monomer of p-tert-butyl-dimethylsilyloxystyrene (p-TBDMSOS). The results showed that the active species were almost not poisonous to the catalyst by the protected vinyl polar monomer. Moreover, the composition and sequence length as well as sequence distribution in the copolymers were investigated by theor. calculation and 13C NMR characterization. Especially, the incorporation ratio of p-TBDMSOS into the polyethylene chain could be controlled by changing p-TBDMSOS concentration in the feed. Interestingly, an approx. alternating copolymer of poly(E-alt-(p-TBDMSOS)) could be formed when the p-TBDMSOS feed concentration increased to 1.0 mol L-1. Subsequently, the poly(ethylene-co-(p-hydroxystyrene)) (poly(E-co-(p-HOS))) could be prepared by a facile deprotection in terms of desilylation of tert-butyldimethylsilyl ether. The hydrophilicity of poly(E-co-(p-HOS)) films were investigated by water contact angle measurements. In the experimental materials used by the author, we found Methyltriphenylphosphonium bromide(cas: 1779-49-3Related Products of 1779-49-3)

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.Related Products of 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Formula: C19H18BrPIn 2020 ,《Syndioselective 3,4-Polymerization of 1-Phenyl-1,3-Butadiene by Rare-Earth Metal Catalysts》 was published in ACS Catalysis. The article was written by Jiang, Yang; Kang, Xiaohui; Zhang, Zhen; Li, Shihui; Cui, Dongmei. The article contains the following contents:

Coordination polymerization of 1-phenyl-1,3-butadiene (1PB) was carried out by diiminophosphinato lutetium complexes 1 and 2, pyridyl-methylene-fluorenyl complexes 3 (Sc 3a; Lu 3b; Y 3c) and 4 (Sc 4a; Lu 4b; Y 4c), β-diiminato yttrium complex 5, bis(imino)aryl gadolinium complex 6, bis(phosphino)carbazolide yttrium complex 7 and bis(phosphinophenyl)amido complex 8. Complexes 1, 2, 3a,b and 4a,b, under the activation of [Ph3C][B(C6F5)4] and AliBu3, show high activities as well as higher than 96.6% 3,4-regio selectivities, of which 1 and 2 are non stereoselective to give atactic 3,4-poly(1PB), while 3a,b and 4a,b exhibit distinguished syndioselectivities (> 95.3% rrrr). However, 3c and 4c are inactive. In addition, complexes 5-7 are also completely inert although they are highly active and cis-1,4 selective for isoprene polymerization On contrary, the analogous cis-1,4 selective complex 8 exhibits syndio- (> 96.1% rrrr) and 3,4-regio (> 99%) selectivity. Hydrogenation of a syndiotactic 3,4-poly(1PB) affords a syndiotactic poly(4-phenyl-1-butene) elastomer with a Tg of 17°C. The cationic cyclization transfers a syndiotactic 3,4-poly(1PB) into a rigid cyclized polyolefin with a Tg as high as 327°C. DFT simulations are employed to illustrate the mechanisms for control of activity and stereo-selectivity from thermodn. and geometric viewpoints. The results came from multiple reactions, including the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3Formula: C19H18BrP)

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.Formula: C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Zhang, Wenqi; Lin, Zhichao; Cai, Qingbin; Xu, Xiangning; Dong, Hongye; Mu, Cheng; Zhang, Jian-Ping published an article in ChemSusChem. The title of the article was 《Electron Transport Assisted by Transparent Conductive Oxide Elements in Perovskite Solar Cells》.Product Details of 13465-09-3 The author mentioned the following in the article:

Fluorine and indium elements in Fluorine doped tin oxide and tin doped Indium oxide, resp., significantly contribute toward enhancing the elec. conductivity of these transparent conductive oxides. In this study, fluorine was combined with indium to modify the tinoxide electron transport layer through Indiumoxide. Consequently, the modified perovskite solar cells showe the favorable alignment of energy levels, improved absorption and utilization of light, enhanced interfacial charge extraction, and suppressed interfacial charge recombination. After indium fluoride modification, the open circuit voltage and fill factor of the perovskite solar cells were significantly improved, and the photoelec. conversion efficiency reached 21.39%, far exceeding that of the control perovskite solar cells (19.62%). In the experiment, the researchers used many compounds, for example, Indium(III) bromide(cas: 13465-09-3Product Details of 13465-09-3)

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.Product Details of 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《1,6-Aza-Michael addition of para-quinone methides with N-heterocycles catalyzed by Zn(OTf)2: A regioselective approach to N-diarylmethyl-substituted heterocycles》 was written by Guin, Soumitra; Saha, Hemonta K.; Patel, Ashvani K.; Gudimella, Santosh K.; Biswas, Subhankar; Samanta, Sampak. Quality Control of 3,6-Dibromo-9H-carbazole And the article was included in Tetrahedron in 2020. The article conveys some information:

An efficient Zn(OTf)2-catalyzed regioselective C-N bond making reaction between a bunch of aryl/heteroaryl-substituted para-quinone methides as ideal 1,6-acceptors and various aromatic/non-aromatic aza-heterocycles bearing N-H moiety namely carbazoles, pyrazoles, indazole, benzotriazole and saccharin is reported. This 1,6-aza-Michael technique delivers predominantly N1-diarylmethyl-substituted heterocyclic scaffolds bearing a valuable phenolic moiety in good to high yields with an excellent regioselectivity. Furthermore, this LUMO lowering catalytic system allows different kinds of useful functionalities and excels with broad substrates under mild conditions. Importantly, control experiments suggested that N2-adducts of indazole, benzotriazole and 3-Me pyrazole as minor isomers were progressively converted into N1-adducts during the reaction via a retro-aza-Michael reaction triggered by Zn(OTf)2, offering excellent regioselectivities of the products. In the part of experimental materials, we found many familiar compounds, such as 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Quality Control of 3,6-Dibromo-9H-carbazole)

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 as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.Quality Control of 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Organic Letters included an article by Zhou, Lan; Shen, Yao-Bin; An, Xiao-De; Li, Xian-Jiang; Li, Shuai-Shuai; Liu, Qing; Xiao, Jian. Application of 13465-09-3. The article was titled 《Redox-Neutral β-C(sp3)-H Functionalization of Cyclic Amines via Intermolecular Hydride Transfer》. The information in the text is summarized as follows:

The first redox-neutral and transition-metal-free β-C(sp3)-H functionalization of cyclic amines via a consecutive intermol. hydride transfer process is reported. A series of N-aryl pyrrolidines and N-aryl 1,2,3,4-tetrahydropyridines decorated with CF3 and carboxylic ester functionalities are directly accessed in good yields from pyrrolidines and piperidines. This work pushes forward the application of the intermol. hydride transfer strategy in one-step assembly of mol. complexity. The experimental process involved the reaction of Indium(III) bromide(cas: 13465-09-3Application of 13465-09-3)

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.Application of 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Safety of Indium(III) bromideIn 2019 ,《Cobalt-Catalyzed Hydroacylative Dimerization of Allenes Leading to Skipped Dienes》 was published in Organic Letters. The article was written by Ding, Wei; Ho, Yan King Terence; Okuda, Yasuhiro; Wijaya, Christopher Kevin; Tan, Zheng Hao; Yoshikai, Naohiko. The article contains the following contents:

A cobalt-diphosphine catalyst was found to promote a selective 1:2 coupling reaction between aldehydes and allenes to form β,δ-dialkylidene ketones, featuring skipped diene moieties, with high regioselectivities and stereoselectivities. The reaction is distinct from previously reported, rhodium-catalyzed aldehyde-allene 1:2 coupling to afford β,γ-dialkylidene ketones bearing 1,3-diene moieties. The present hydroacylative dimerization involves a unique allene/allene oxidative cyclization mode to form a C1-C2 linkage between the allene mols. The experimental part of the paper was very detailed, including the reaction process of Indium(III) bromide(cas: 13465-09-3Safety of Indium(III) bromide)

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.Safety of Indium(III) bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary