Author: Jessica.F

Klingstedt, Therese; Shirani, Hamid; Ghetti, Bernardino; Vidal, Ruben; R. Nilsson, K. Peter published their research in ChemBioChem in 2021. The article was titled 《Thiophene-Based Optical Ligands That Selectively Detect Aβ Pathology in Alzheimer′s Disease》.Synthetic Route of C4H2Br2S The article contains the following contents:

In several neurodegenerative diseases, the presence of aggregates of specific proteins in the brain is a significant pathol. hallmark; thus, developing ligands able to bind to the aggregated proteins is essential for any effort related to imaging and therapeutics. Here we report the synthesis of thiophene-based ligands containing nitrogen heterocycles. The ligands selectively recognized amyloid-β (Aβ) aggregates in brain tissue from individuals diagnosed neuropathol. as having Alzheimer′s disease (AD). The selectivity for Aβ was dependent on the position of nitrogen in the heterocyclic compounds, and the ability to bind Aβ was shown to be reduced when introducing anionic substituents on the thiophene backbone. Our findings provide the structural and functional basis for the development of ligands that can differentiate between aggregated proteinaceous species comprised of distinct proteins. These ligands might also be powerful tools for studying the pathogenesis of Aβ aggregation and for designing mols. for imaging of Aβ pathol. In the experimental materials used by the author, we found 2,5-Dibromothiophene(cas: 3141-27-3Synthetic Route 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.Synthetic Route of C4H2Br2S

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Liu, Yahuan; Wang, Zheng; Zhao, Ziwei; Gao, Pengxiang; Ma, Ning; Liu, Qingbin published their research in Molecular Catalysis in 2021. The article was titled 《Efficient base-free hydrodehalogenation of organic halides catalyzed by a well-defined diphosphine-ruthenium(II) complex》.Related Products of 2635-13-4 The article contains the following contents:

A base-free, robust catalytic system based on the diphosphine-ruthenium(II) complex cation has been developed for the hydrodehalogenation of a wide range of aryl- and alkyl-chlorides/bromides (27 examples) with mol. hydrogen. Notably, the reaction proceeds at 120°C with low catalyst loading (0.1 mol%) and exhibits a good tolerance toward functional groups, such as amido, carboxyl, sulfonyl, methoxyl, ester groups. Moreover, a mechanism for the diphosphine-ruthenium(II) complex cation catalyzed dehalogenation process has been proposed. This hydrodehalogenation methodol. shows a potential application for the organic transformation and degradation of organic halides.5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4Related Products of 2635-13-4) was used in this study.

Furthermore, the coupling of 5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4) with β-methallyl alcohol was catalyzed by Pd(OAc)2 in combination with P(t-Bu)3.Related Products of 2635-13-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Kai; Deng, Zi-Hao; Xie, Si-Jun; Zhai, Dan-Dan; Fang, Hua-Yi; Shi, Zhang-Jie published their research in Nature Communications in 2021. The article was titled 《Synthesis of arylamines and N-heterocycles by direct catalytic nitrogenation using N2》.HPLC of Formula: 7073-94-1 The article contains the following contents:

Herein, an example of direct catalytic nitrogenation was reported to afford valuable diarylamines, triarylamines, and N-heterocycles from easily available organohalides using dinitrogen (N2) as the nitrogen source in a one-pot/two-step protocol. In this protocol, lithium nitride, generated in situ with the use of lithium as a reductant, was confirmed as a key intermediate. Structurally diversified polyanilines were also generated in one pot, showing great potential for materials chem. This chem. provided an alternative pathway for catalytic nitrogenation to synthesize highly valuable N-containing chems. from dinitrogen. With this method, 15N atoms were easily incorporated into organic mols. In the experimental materials used by the author, we found 1-Bromo-2-isopropylbenzene(cas: 7073-94-1HPLC of Formula: 7073-94-1)

1-Bromo-2-isopropylbenzene(cas: 7073-94-1) 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. HPLC of Formula: 7073-94-1 Dehydrobromination, Grignard reactions, reductive coupling, Wittig reaction, and several nucleophilic substitution reactions are some of the principal reactions which involve organic bromides.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Xin; Liu, Jun; Chen, Jinyao; Zhang, Ming; Tian, Chuan; Peng, Xiaoping; Li, Gang; Chang, Wenqiang; Lou, Hongxiang published their research in Bioorganic Chemistry in 2021. The article was titled 《Azole-triphenylphosphonium conjugates combat antifungal resistance and alleviate the development of drug-resistance》.HPLC of Formula: 17696-11-6 The article contains the following contents:

Azole antifungals are commonly used to treat fungal infections but have resulted in the occurrence of drug resistance. Therefore, developing azole derivatives (AZDs) that can both combat established drug-resistant fungal strains and evade drug resistance is of great importance. In this study, we synthesized a series of AZDs with a fluconazole (FLC) skeleton conjugated with a mitochondria-targeting triphenylphosphonium cation (TPP+). These AZDs displayed potent activity against both azole-sensitive and azole-resistant Candida strains without eliciting obvious resistance. Moreover, two representative AZDs, I and II, exerted synergistic antifungal activity with Hsp90 inhibitors against C. albicans strains resistant to the combination treatment of FLC and Hsp90 inhibitors. AZD 25, which had minimal cytotoxicity, was effective in preventing C. albicans biofilm formation. Mechanistic investigation revealed that AZD II inhibited the biosynthesis of the fungal membrane component ergosterol and interfered with mitochondrial function. Our findings provide an alternative approach to address fungal resistance problems. The experimental part of the paper was very detailed, including the reaction process of 8-Bromooctanoic acid(cas: 17696-11-6HPLC of Formula: 17696-11-6)

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.HPLC of Formula: 17696-11-6

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Liao, Xudong; Zhou, Yi; Ai, Chengmei; Ye, Cuijiao; Chen, Guanghui; Yan, Zhaohua; Lin, Sen published their research in Tetrahedron Letters in 2021. The article was titled 《SO2F2-mediated oxidation of primary and tertiary amines with 30% aqueous H2O2 solution》.Recommanded Product: 626-40-4 The article contains the following contents:

A highly efficient and selective oxidation of primary and tertiary amines employing SO2F2/H2O2/base system was described. Anilines were converted to the corresponding azoxybenzenes I [R = H, 4-Me, 3-Cl-4-Me, etc.], while primary benzylamines were transformed into nitriles ArC≡N [Ar = Ph, 4-ClC6H4, 4-MeOC6H4, etc.] and secondary benzylamines were rearranged to amides ArNHC(O)R1 [Ar = Ph; R1 = Me, Et]. For tertiary amine substrates quinolines, isoquinolines and pyridines, their oxidation products were the corresponding N-oxides II [R1 = R2 = Me; R3 = Me, Ph], III [R4 = H, 7-Me, 6-NO2; R5 = 2-Me, 3-Me, 4-Me], IV [R6 = H, 8-Cl, 6-Br] and V [R7 = H, 2,6-di-Me, 4-MeO, 2-Br, 4-oxiran-2-yl]. The reaction conditions were very mild and just involve SO2F2, amines, 30% aqueous H2O2 solution, and inorganic base at room temperature One unique advantage was that this oxidation system was just composed of inexpensive inorganic compounds without the use of any metal and organic compounds The results came from multiple reactions, including the reaction of 3,5-Dibromoaniline(cas: 626-40-4Recommanded Product: 626-40-4)

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. The reaction of alkyl halides, R―X, where X is a halogen, or analogous reagents with ammonia (or amines) is useful with certain compounds. Not all alkyl halides are effective reagents; the reaction is sluggish with secondary alkyl groups and fails with tertiary ones. Its usefulness is largely confined to primary alkyl halides (those having two hydrogen atoms on the reacting site).Recommanded Product: 626-40-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Duan, Jingxiang; Xiong, Zongli; Zhou, Yuqiao; Yao, Weijun; Li, Xiaoyi; Zhang, Min; Wang, Zhen published their research in Organic Letters in 2021. The article was titled 《Access to Chiral Chromenones through Organocatalyzed Mannich/Annulation Sequence》.Recommanded Product: Benzyl 2-bromoacetate The article contains the following contents:

An efficient and practical method to access chiral chromenones I (R1 = H, 5-OBn, 6-Cl, 7-OMe, etc.; R2 = H, Me, n-pentyl, 2-phenylethenyl, etc.; R3 = Ph, TMS, cyclohexyl, etc.), II bearing one α-amino stereogenic center in the β position of the carbonyl group was reported. The quinine-derived squaramide could efficiently promote Mannich/cycloketalization/dehydration tandem reactions between 1-(2-hydroxyaryl)-1,3-diketones 2-OH-R4C6H3C(O)CH2C(O)R2 (R4 = H, 5-Cl, 4-OMe, 4-OBn, etc.) and functionalized imines R3CCCH(NHBoc)OEt/R5N(OBoc)CH2COOBn (R5 = Cbz, Boc) generated in situ, providing a wide range of chiral chromenones with propargylamine I or α-amino ester moieties II with good results (54 examples, up to 98% ee). In the experimental materials used by the author, we found Benzyl 2-bromoacetate(cas: 5437-45-6Recommanded Product: Benzyl 2-bromoacetate)

Benzyl 2-bromoacetate(cas: 5437-45-6) belongs to benzyl acetate. Benzyl acetate is an aromatic chemical, usually appearing as a clear liquid with a moderate sweet-jasmine fragrance. This compound appears as a component of some of our fragrance blends.Recommanded Product: Benzyl 2-bromoacetate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Linfeng; Zheng, Jing; Zou, Wenya; Shu, Yongqi; Yang, Weiran published an article in 2021. The article was titled 《Microwave-Assisted Nickel-Catalyzed Rapid Reductive Coupling of Ethyl 3-iodopropionate to Adipic Acid》, and you may find the article in Catalysis Letters.Application of 539-74-2 The information in the text is summarized as follows:

3-Iodopropionic acid (3-IPA) can be efficiently synthesized from the glycerol derivative glyceric acid (GA), which is a potential biomaterial-based platform mol. In this report, Et 3-iodopropionate was rapidly dimerized to di-Et adipate in a microwave reactor using NiCl2.6H2O as a catalyst, co-catalyzed by Mn and the 1, 10-Phenanthroline monohydrate ligand. Under the optimum reaction conditions, di-Et adipate can be obtained with 84% yield at 90°C in just 5 min. Di-Et adipate was hydrolyzed to obtain the adipic acid (AA) in 89% yield with an acid catalyst. AA is an important chem. and a monomer for producing a wide range of high-performance polymeric substances. This rapid coupling method is also applicable to other alkyl halides. The experimental part of the paper was very detailed, including the reaction process of Ethyl 3-bromopropanoate(cas: 539-74-2Application of 539-74-2)

Ethyl 3-bromopropanoate(cas: 539-74-2) 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. Application of 539-74-2 Due to the reactivity of bromide, they are used as potential precursors or important intermediates in organic synthesis.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Jiaguo; Xiao, Dian; Xie, Fei; Li, Wei; Zhao, Lei; Sun, Wei; Yang, Xiaohong; Zhou, Xinbo published an article in 2021. The article was titled 《Novel antibody-drug conjugate with UV-controlled cleavage mechanism for cytotoxin release》, and you may find the article in Bioorganic Chemistry.Application of 2969-81-5 The information in the text is summarized as follows:

Antibody-drug conjugates (ADCs) are being developed worldwide with the potential to revolutionize current cancer treatment strategies. However, off-target toxicity caused by the instability of linkers remains one of the main issues to be resolved. Developing a novel photocontrol-ADC with good stability and photocontrolled release seemed to be an attractive and practical solution In this study, we designed, for the first time, a novel UV light-controlled ADC by carefully integrating the UV-cleavable o-nitro-benzyl structure into the linker. Our preliminary work indicated that the ADC exhibited good stability and photocontrollability while maintaining a targeting effect similar to that of the naked antibody. Upon irradiation with UV light, the ADC rapidly released free cytotoxins and exerted significant cytotoxicity toward drug-resistant tumor cells. Compared to those of the unirradiated cells, the EC50 values of ADCs increased by up to 50-fold. Furthermore, our research confirmed that the degradation products of unirradiated ADC, Cys-1a, were relatively less toxic, thus potentially reducing the off-target toxicity caused by nonspecific uptake of ADCs. The novel design strategy of UV light-controlled ADCs may provide new perspectives for future research on ADCs and promote the development of photocontrol systems. The experimental part of the paper was very detailed, including the reaction process of Ethyl 4-bromobutyrate(cas: 2969-81-5Application of 2969-81-5)

Ethyl 4-bromobutyrate(cas: 2969-81-5) 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.Application of 2969-81-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Herr, Patrick; Kerzig, Christoph; Larsen, Christopher B.; Haussinger, Daniel; Wenger, Oliver S. published an article in 2021. The article was titled 《Manganese(I) complexes with metal-to-ligand charge transfer luminescence and photoreactivity》, and you may find the article in Nature Chemistry.Related Products of 14516-54-2 The information in the text is summarized as follows:

Precious metal complexes with the d6 valence electron configuration often exhibit luminescent metal-to-ligand charge transfer (MLCT) excited states, which form the basis for many applications in lighting, sensing, solar cells and synthetic photochem. Iron(II) has received much attention as a possible Earth-abundant alternative, but to date no iron(II) complex has been reported to show MLCT emission upon continuous-wave excitation. Manganese(I) has the same electron configuration as that of iron(II), but until now has typically been overlooked in the search for cheap MLCT luminophores. Here we report that isocyanide chelate ligands give access to air-stable manganese(I) complexes that exhibit MLCT luminescence in solution at room temperature These compounds were successfully used as photosensitizers for energy- and electron-transfer reactions and were shown to promote the photoisomerization of trans-stilbene. The observable electron transfer photoreactivity occurred from the emissive MLCT state, whereas the triplet energy transfer photoreactivity originated from a ligand-centered 3π-π* state. [graphic not available: see fulltext]. In the experiment, the researchers used many compounds, for example, Bromopentacarbonylmanganese(I)(cas: 14516-54-2Related Products of 14516-54-2)

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.Related Products of 14516-54-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sun, Qing; Lu, Feng-Hui; Ni, Hong-Gang published an article in 2021. The article was titled 《Microplastic-water partitioning of two states halogenated PAHs: Solute and sol》, and you may find the article in Environmental Research.Formula: C14H8Br2 The information in the text is summarized as follows:

The complex interactions of contaminants with microplastics significantly affect ecol. risk assessments. Studies of the sorption behavior of freely dissolved hydrophobic organic contaminants (HOCs) on microplastics are common. However, concentrations of HOCs in the actual aquatic environment sometimes exceed their water solubility A possible explanation is that a microplastic-sol-water three-phase medium (TPM) is formed in the actual water environment. Both states HOCs (in solute and sol) have the potential to migrate to particles suspended in water. To confirm this view, four kinds of microplastics and eight halogenated polycyclic aromatic hydrocarbons (HPAHs) were selected to examine the partitioning of HPAHs between microplastics and water (sol and solute). Both monolayer and multilayer coverage of HPAHs onto microplastics occurred, and chem. sorption dominated the pseudo-sorption mechanism. The microplastic-water partition ratios of HPAHs (0.12-0.74) were approx. four to five orders of magnitude lower than their corresponding KOW values, suggesting that mechanisms other than sorption were involved. Apparently, the sol HPAHs contributed almost identically large increments to both microplastics and water, and closed the gap. For microplastic-supported HPAHs, the contribution of the sol fraction was more than triple that of the dissolved fraction; the key influencing factor was the water solubility of HPAHs. In the experiment, the researchers used 9,10-Dibromoanthracene(cas: 523-27-3Formula: C14H8Br2)

9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Formula: C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary