Category: 111-24-0

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Annulation of Indoles with 1,n-Dibromoalkanes by a Pd(II)-Catalyzed and Norbornene-Mediated Reaction Cascade, published in 2020-04-30, which mentions a compound: 111-24-0, mainly applied to carbazole tetrahydro preparation regioselective; dibromoalkane indole tandem cyclization palladium catalyst, Recommanded Product: 111-24-0.

By employing 1,3-dibromopropane, 1,4-dibromobutane, and 1,5-dibromopentane as biselectrophiles, the annulation of indoles I (R = H, 5-Br, 4-CN, 5-t-BuO2C, etc.) was probed in the presence of PdCl2(CH3CN)2 as a catalyst and norbornene as a transpositional ligand. Ring formation to a five-membered ring was observed at positions C2 and N, while annulation of a six-membered ring occurred at positions C2 and C3. The latter cascade process was successfully applied to the direct synthesis of 1,2,3,4-tetrahydrocarbazoles II from indoles I (11 examples, 31-68% yields). Seven-membered-ring annulation was feasible by an initial coupling at position C2 followed by alkylation at C3.

There are many compounds similar to this compound(111-24-0)Recommanded Product: 111-24-0. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Ether spaced N-spirocyclic quaternary ammonium functionalized crosslinked polysulfone for high alkaline stable anion exchange membranes, published in 2020-03-15, which mentions a compound: 111-24-0, mainly applied to ether spirocyclic quaternary ammonium crosslinked polysulfone anion exchange membrane, Category: chiral-nitrogen-ligands.

N-spirocyclic cations containing anion exchange membranes (AEMs) possess excellent alk. stability, but poor mech. and conductive properties due to the rigid N-spirocyclic structure and lack of flexible side chain structural design. In this work, a flexible ether spaced N-spirocyclic quaternary ammonium functionalized side chain is proposed, in which hydroxyl substituted N-spirocyclic cation provides active grafting site with chloromethylated polysulfone through Williamson etherification. The flexible ether-oxygen spacer promotes aggregation of the rigid spirocyclic cations and thus significantly improves conductivity The uniformly in-situ thermal crosslinking between benzene rings and the residue chloromethyl groups in polysulfone greatly enhances mech. properties of the membranes. Constrained ring conformation of N-spirocyclic cation, ether spaced benzyl-free side chain, as well as the OH- blocking crosslinked networks endow an excellent alk. stability to the membranes. The ether spaced N-spirocyclic containing membranes exhibit well micro-phase separation structure, up to around 85.7 mS cm-1 of hydroxide conductivity at 80°C, around 10.5 MPa of tensile strength in hydrated state and around 95.6% conductivity retention after immersion in 1 M KOH at 80°C for 720 h. The performance is among the best N-spirocyclic functionalized AEMs reported in the literature.

There are many compounds similar to this compound(111-24-0)Category: chiral-nitrogen-ligands. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Abdpour, Shahin; Jalili-Baleh, Leili; Nadri, Hamid; Forootanfar, Hamid; Bukhari, Syed Nasir Abbas; Ramazani, Ali; Ebrahimi, Seyed Esmaeil Sadat; Foroumadi, Alireza; Khoobi, Mehdi researched the compound: 1,5-Dibromopentane( cas:111-24-0 ).Related Products of 111-24-0.They published the article 《Chromone derivatives bearing pyridinium moiety as multi-target-directed ligands against Alzheimer’s disease》 about this compound( cas:111-24-0 ) in Bioorganic Chemistry. Keywords: pyridiniumyl alkoxy phenyl chromenone preparation cytotoxicity ADMET docking neuroprotective; chromenone pyridiniumyl alkoxy preparation human AChE BuChE inhibition antitumor; Alzheimer’s disease; Anti-amyloid aggregation; Cholinesterase inhibitors; Chromone; Neuroprotective activity; Pyridinium salts. We’ll tell you more about this compound (cas:111-24-0).

A new serise of 7-hydroxy-chromone derivatives bearing pyridine moiety I [R = H, Ph, 4-ClC6H4, etc.; R1 = H, Et; n= 3, 4, 5] were synthesized and evaluated as multifunctional agents against Alzheimer’s disease (AD). Most of the compounds I were good AChE inhibitors (IC50 = 9.8-0.71μM) and showed remarkable BuChE inhibition activity (IC50 = 1.9-0.006μM) compared with donepezil as the standard drug (IC50 = 0.023 and 3.4μM). Compounds I [R = 4-ClC6H4, R1 = H, n = 4] and I [R = 4-MeOC6H4, R1 = Et, n = 3] showed the best inhibitory activity toward AChE (IC50 = 0.71μM) and BuChE (IC50 = 0.006μM), resp. The ligand-protein docking simulations and kinetic studies revealed that compound I [R = 4-ClC6H4, R1 = H, n = 4] and I [R = 4-MeOC6H4, R1 = Et, n = 3] could bind effectively to the peripheral anionic binding site (PAS) of the AChE and BuChE through mixed-type inhibition. In addition, the most potent compounds I [R = 4-ClC6H4, 4-MeC6H4, R1 = H, Et, n = 4, 3] showed acceptable neuroprotective activity on H2O2- and Aβ-induced .neurotoxicity in PC12 cells, more than standard drugs. The compounds I could block effectively self- and AChE-induced Aβ aggregation. All the results suggest that compounds I [R = 4-ClC6H4, 4-MeC6H4, R1 = H, Et, n = 4, 3] could be considered as promising multi-target-directed ligands against AD.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Russian Journal of Organic Chemistry called The First Analog of Pyrimidine Nucleosides with Two Nucleobases and Two D-Ribofuranose Residues, Author is Andreeva, O. V.; Saifina, L. F.; Belenok, M. G.; Semenov, V. E.; Kataev, V. E., which mentions a compound: 111-24-0, SMILESS is BrCCCCCBr, Molecular C5H10Br2, SDS of cas: 111-24-0.

The reaction of 1,5-bis[1-(prop-2-yn-1-yl)uracil-3-yl]pentane with 2′,3′,5′-tri-O-acetyl-β-D-ribofuranosylazide followed by removing of acetyl protective groups with a solution of sodium methylate in methanol afforded 1,5-bis{[1-methyl(β-D-ribofuranosyl)-1H-1,2,3-triazole-4-yl]uracil-3-yl}pentane which is the first analog of pyrimidine nucleosides with two nucleobases and two D-ribofuranose residues.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Formula: C5H10Br2. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about N-spirocyclic ammonium-functionalized graphene oxide-based anion exchange membrane for fuel cells. Author is Long, Chuan; Lu, Chuanrui; Li, Yunxi; Wang, Zhihua; Zhu, Hong.

Graphene oxide (GO) is a potential material in the electrode and membrane of polymer electrolyte membrane fuel cells due to its unique structure and various oxygen-containing functional groups. A class of three-layered GO/poly(phenylene oxide) for AEMs was prepared in this work. GO was functionalized with highly stable 6-azonia-spiro [5.5]undecane groups and used as a fast hydroxide conductor, named ASU-GO. Functionalized by N-spirocyclic cations, poly (phenylene oxide) (PIPPO) was then combined with ASU-GO and GO to fabricate the ASU-GO/PIPPO and GO/PIPPO. Notably, the maximum hydroxide conductivity of the ASU-GO/PIPPO was 73.7 mS cm-1 at 80 °C, which was 3 times higher than that of the GO/PIPPO. The enhancement in hydroxide conductivity was due to the changes in the hydroxide transport mechanism and the poor stacked structure of the ASU-GO layer. Only 10.8% drops in hydroxide conductivity of ASU-GP/PIPPO after the alk. test (1 M KOH at 80 °C for 700 h). Furthermore, the ASU-GO/PIPPO-50 membrane showed a maximum peak power d. of 102 mW cm-2, demonstrating the prepared membrane was promising in the AEM applications.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Kulaga, Damian; Jaskowska, Jolanta; Satala, Grzegorz published an article about the compound: 1,5-Dibromopentane( cas:111-24-0,SMILESS:BrCCCCCBr ).Product Details of 111-24-0. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:111-24-0) through the article.

Schizophrenia and depression are diseases that significantly impede human functioning in society. Current antidepressant drugs are not fully effective. According to literature data, the effect on D2R or 5-HT1AR can effectively reduce the symptoms of depression or schizophrenia. Recent research hypothetized that the synergism of both of these receptors can improve the effectiveness of therapy. Ipsapirone, a representative of long-chain arylpiperazines, is a known 5-HT1AR ligand that has antidepressant effect. This compound has no affinity for the D2R. Bearing in mind, we decided to design ligands with improved affinity to D2R and confirmed that in some cases elongation of the carbon linker or arylpiperazine exchange may have beneficial influence on the binding to D2R and 5-HT1AR. Four groups of ligands being ipsapirone analogs with Bu, pentyl, hexyl and stiffened xylene chains were designed. All compounds were obtained in solvent-free reactions supported by a microwave irradiation with an efficiency mainly above 60%. All ligands containing 1-(2-pyrimidinyl)piperazine exhibited high affinity to 5-HT1AR. In this case, chem. modifications within the chain did not affect the affinity to D2R. In the case of ligands containing 1-phenylpiperazine, 1-(3-trifluoromethylphenyl)piperazine, 1-(1-naphthyl)piperazine, and 1-(4-chlorophenyl)piperazine, elongation of carbon linker increases of affinity to D2R. For ligands containing 1- (2-pyridyl) piperazine, and 1-(2,3-dichlorophenyl)piperazine, we observed an opposite effect. For ligands containing 1-phenylpiperazine, 1-(2-methoxyphenyl)piperazine and 1-(2-pyridyl)piperazine, chain elongation had no effect on 5-HT1AR binding. In turn of ligands containing 1-(3-trifluoromethylphenyl)piperazine and 1- (2,3-dichlorophenyl)piperazine, we observed that elongation of carbon linker has a pos. influence to 5-HT1AR. Mol. modeling was used to support the SAR study.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 111-24-0, is researched, SMILESS is BrCCCCCBr, Molecular C5H10Br2Journal, International Journal of Hydrogen Energy called High chemical stability anion exchange membrane based on poly(aryl piperidinium): Effect of monomer configuration on membrane properties, Author is Long, Chuan; Wang, Zhihua; Zhu, Hong, the main research direction is polytriphenyl piperidine based anion exchange membrane preparation.SDS of cas: 111-24-0.

In recent years, ether-free polyaryl polymers prepared by superacid-catalyzed Friedel-Crafts polymerization have attracted great research interest in the development of anion exchange membranes(AEMs) due to their high alkali resistance and simple synthesis methods. However, the selection of monomers for high-performance polymer backbone and the relationship between polymer structure construction and properties need further investigated. Herein, a series of free-ether poly(aryl piperidinium) (PAP) with different polymer backbone steric construction were synthesized as stable anion exchange membranes. Meta-terphenyl, p-terphenyl and diphenyl-terphenyl copolymer were chosen as monomers to regulate the spatial arrangement of the polymer backbone, which tethered with stable piperidinium cation to improve the chem. stability. In addition, a multi-cation crosslinking strategy has been applied to improve ion conductivity and mech. stability of AEMs, and further compared with the performance of uncrosslinked AEMs. The properties of the resulting AEMs were investigated and correlated with their polymer structure. In particular, m-terphenyl based AEMs exhibited better dimensional stability and the highest hydroxide conductivity of 144.2 mS/cm at 80°C than other membranes, which can be attributed to their advantages of polymer backbone arrangement. Furthermore, the hydroxide conductivity of the prepared AEMs remains 80%-90% after treated by 2 M NaOH for 1600 h, exhibiting excellent alk. stability. The single cell test of m-PTP-20Q4 exhibits a maximum power d. of 239 mW/cm2 at 80°C. Hence, the results may guide the selection of polymer monomers to improve performance and alk. durability for anion exchange membranes.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1,5-Dibromopentane( cas:111-24-0 ) is researched.SDS of cas: 111-24-0.Pham, Thanh Huong; Allushi, Andrit; Olsson, Joel S.; Jannasch, Patric published the article 《Rational molecular design of anion exchange membranes functionalized with alicyclic quaternary ammonium cations》 about this compound( cas:111-24-0 ) in Polymer Chemistry. Keywords: ammonium cation rational mol anion exchange membrane alicyclic quaternary. Let’s learn more about this compound (cas:111-24-0).

High alk. stability is critical for polymeric anion exchange membranes (AEMs) and ionomers for use in alk. electrochem. energy conversion and storage devices such as fuel cells, electrolyzer cells and advanced batteries. Here, we have prepared and studied ether-free polyfluorenes tethered with N,N-dimethylpiperidinium (DMP) and 6-azonia-spiro[5.5]undecane (ASU) cations, resp., attached through heteroatom-free alkyl spacers. By employing alkyl-alkyl Suzuki cross-coupling, these alicyclic quaternary ammonium cations are attached at the 4-position to impede ionic loss. Thus, all the β-hydrogens sensitive to elimination reactions are placed in strain-free rings able to fully relax by the spacer flexibility. Consequently, the AEM carrying DMP cations shows a very high alk. and thermal stability, retaining more than 91% of the cations after 2400 h immersion in 2 M NaOH at 90 °C. Compared with corresponding AEM functionalized with N-alkyl-N-methylpiperidinium (AMP) cations [conventionally tethered via the 1(N)-position], the ionic loss by β-elimination is successfully reduced by up to 92%. The AEM functionalized with DMP also reaches a high hydroxide conductivity of 124 mS cm-1 at 80 °C. Consequently, tethering piperidine-based cations via the 4-position instead of the 1(N)-position results in AEMs with substantially improved thermal and alk. stability, combined with high hydroxide conductivity

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 111-24-0, is researched, SMILESS is BrCCCCCBr, Molecular C5H10Br2Journal, Article, Physical Chemistry Chemical Physics called The role of conformational heterogeneity in the excited state dynamics of linked diketopyrrolopyrrole dimers, Author is Bradley, Siobhan J.; Chi, Ming; White, Jonathan M.; Hall, Christopher R.; Goerigk, Lars; Smith, Trevor A.; Ghiggino, Kenneth P., the main research direction is diketopyrrolopyrrole preparation conformation fluorescence excited state electronn transfer.SDS of cas: 111-24-0.

Diketopyrrolopyrrole (DPP) derivatives have been proposed for both singlet fission and energy upconversion as they meet the energetic requirements and exhibit superior photostability compared to many other chromophores. In this study, both time-resolved electronic and IR spectroscopy have been applied to investigate excited state relaxation processes competing with fission in dimers of DPP derivatives with varying linker structures. A charge-separated (CS) state is shown to be an important intermediate with dynamics that are both solvent and linker dependent. The CS state is found for a subset of the total population of excited mols. and it is proposed that CS state formation requires suitably aligned dimers within a broader distribution of conformations available in solution No long-lived triplet signatures indicative of singlet fission were detected, with the CS state likely acting as an alternative relaxation pathway for the excitation energy. This study provides insight into the role of mol. conformation in determining excited state relaxation pathways in DPP dimer systems.

Here is just a brief introduction to this compound(111-24-0)SDS of cas: 111-24-0, more information about the compound(1,5-Dibromopentane) is in the article, you can click the link below.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Jiao, Meichen; Huang, Ju; Xu, Hao; Jiang, Jingang; Guan, Yejun; Ma, Yanhang; Wu, Peng published the article 《ECNU-36: A Quasi-Pure Polymorph CH Beta Silicate Composed of Hierarchical Nanosheet Crystals for Effective VOCs Adsorption》. Keywords: nanosheet crystal polymorph adsorption VOC; adsorption; all-silica; high hydrophobicity; polymorph CH; zeolite beta.They researched the compound: 1,5-Dibromopentane( cas:111-24-0 ).Reference of 1,5-Dibromopentane. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:111-24-0) here.

A quasi-pure CH polymorph of microporous zeolite beta, named ECNU-36, was obtained as a highly crystalline silicate using 1,5-bis(tetramethylimidazolium) hydroxide as organic structure-directing agent (OSDA) in fluoride media. An appropriate concentration of free fluoride in the synthetic mother liquor was crucial to purify the CH-phase. The framework structure of ECNU-36 consists of polymorph CH ( > 95%) and polymorph B, elucidated by a combination of PXRD data, DIFFaX simulation, EDT, and HRTEM techniques. For the first time, the framework structure of beta CH polymorph was directly confirmed and solved using electron diffraction data. The pure-silica ECNU-36 showed an unusual crystal morphol., composed of stacked nanosheets, with typical 17 nm thickness and exposed {100} facets, which exhibited attractive adsorption performance for hydrocarbons and aromatics

Here is just a brief introduction to this compound(111-24-0)Reference of 1,5-Dibromopentane, more information about the compound(1,5-Dibromopentane) is in the article, you can click the link below.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis