Tag: M.W:200-300

Recommanded Product: 1,5-Dibromopentane. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Fluorinated tolane dyads with alkylene linkage: synthesis and evaluation of photophysical characteristics. Author is Yamada, Shigeyuki; Uto, Eiji; Agou, Tomohiro; Kubota, Toshio; Konno, Tsutomu.

The fluorinated tolane and bistolane derivatives containing fluorinated aromatic rings and demonstrated their intense photoluminescence (PL) characteristics in crystalline powder states was developed. Mols. showing varied PL behavior with a change in the mol. aggregated structures was focused . We synthesized novel fluorinated tolane dyads consisted fluorinated tolane-based π-conjugated scaffolds and flexible alkylene linkages controlled both the electron-d. distribution and mol. aggregated states. Fluorinated tolane dyads connected with an alkylene linkage showed blue PL in a dilute solution, but the PL efficiency achieved was low. In contrast, the crystalline powder of tolane dyad substrates exhibited dual emission-relatively intense blue to deep blue PL-originating from monomer and aggregate emission. The PL behavior changed significantly with the alkylene linkage and the application of a mech. stimulus to the crystalline powder sample. The fluorinated tolane dyads served as stimulus-responsive photoluminescent materials suitable for optical applications was developed .

Different reactions of this compound(1,5-Dibromopentane)Recommanded Product: 1,5-Dibromopentane require different conditions, so the reaction conditions are very important.

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 three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1,5-Dibromopentane(SMILESS: BrCCCCCBr,cas:111-24-0) is researched.Reference of 2-Aminoquinazolin-4(3H)-one. The article 《General sulfone construction via sulfur dioxide surrogate control》 in relation to this compound, is published in Green Chemistry. Let’s take a look at the latest research on this compound (cas:111-24-0).

A highly efficient one-step synthesis of alkyl-alkyl and aryl-alkyl sulfones with a facile combination of halides, sulfur dioxide surrogates and phosphate esters is described. When thiourea dioxide was employed as a reductive sulfur dioxide surrogate, alkyl-alkyl sulfones were obtained under transition metal free conditions. Aryl-alkyl sulfones were obtained with an extremely low catalytic loading (0.2 mol%) via altering the mask of sulfur dioxide surrogates to sodium dithionite. A phosphate ester was employed as a stable and readily available alkyl source. Notably, this protocol has been applied to the late-stage modification of natural products and bioactive mols. Thus, e.g., treatment of (2-bromoethyl)benzene with thiourea dioxide and P(:O)(OMe)3 in presence of Cs2CO3, KI and TBAI afforded [2-(methylsulfonyl)ethyl]benzene (71%).

Different reactions of this compound(1,5-Dibromopentane)HPLC of Formula: 111-24-0 require different conditions, so the reaction conditions are very important.

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

Application In Synthesis of 1,5-Dibromopentane. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Synthesis and photochromic properties of a novel chromene derivative. Author is Perevozchikova, P. S.; Aliev, T. M.; Nikitina, P. A.; Shepel, N. E..

A convenient synthetic approach to a novel 2,2-diphenyl-2H-chromene derivative is developed starting from vanillin or acetovanillone. The photochromic properties of the resulting chromene were studied. The kinetic characteristics of this compound show its potential for the design of new efficient DNA intercalators.

The article 《Synthesis and photochromic properties of a novel chromene derivative》 also mentions many details about this compound(111-24-0)Application In Synthesis of 1,5-Dibromopentane, you can pay attention to it, because details determine success or failure

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, European Journal of Medicinal Chemistry called Rational design of new multitarget histamine H3 receptor ligands as potential candidates for treatment of Alzheimer′s disease, Author is Lazewska, Dorota; Bajda, Marek; Kaleta, Maria; Zareba, Paula; Doroz-Plonka, Agata; Siwek, Agata; Alachkar, Alaa; Mogilski, Szczepan; Saad, Ali; Kuder, Kamil; Olejarz-Maciej, Agnieszka; Godyn, Justyna; Stary, Dorota; Sudol, Sylwia; Wiecek, Malgorzata; Latacz, Gniewomir; Walczak, Maria; Handzlik, Jadwiga; Sadek, Bassem; Malawska, Barbara; Kiec-Kononowicz, Katarzyna, the main research direction is xanthone derivative preparation H3 receptor ligand Alzheimer’s; Alzheimer’s disease; Cholinesterase inhibitors; Histamine H(3) receptor; Monoamine oxidase inhibitors; Multitarget-directed ligands; Xanthone derivatives.Quality Control of 1,5-Dibromopentane.

Design and development of multitarget-directed ligands (MTDLs) has become a very important approach in the search of new therapies for Alzheimer′s disease (AD). In our present research, a number of xanthone derivatives were first designed using a pharmacophore model for histamine H3 receptor (H3R) antagonists/inverse agonists, and virtual docking was then performed for the enzyme acetylcholinesterase. Next, 23 compounds were synthesized and evaluated in vitro for human H3R (hH3R) affinity and inhibitory activity on cholinesterases. Most of the target compounds showed hH3R affinities in nanomolar range and exhibited cholinesterase inhibitory activity with IC50 values in submicromolar range. Furthermore, the inhibitory effects of monoamine oxidases (MAO) A and B were investigated. The results showed low micromolar and selective human MAO B (hMAO B) inhibition. Two azepane derivatives, namely 23 (2-(5-(azepan-1-yl)pentyloxy)-9H-xanthen-9-one) and 25 (2-(5-(azepan-1-yl)pentyloxy)-7-chloro-9H-xanthen-9-one), were especially very promising and showed high affinity for hH3R (Ki = 170 nM and 100 nM resp.) and high inhibitory activity for acetylcholinesterase (IC50 = 180 nM and 136 nM resp.). Moreover, these compounds showed moderate inhibitory activity for butyrylcholinesterase (IC50 = 880 nM and 394 nM resp.) and hMAO B (IC50 = 775 nM and 897 nM resp.). Furthermore, mol. docking studies were performed for hH3R, human cholinesterases and hMAO B to describe the mode of interactions with these biol. targets. Next, the two most promising compounds 23 and 25 were selected for in vivo studies. The results showed significant memory-enhancing effect of compound 23 in dizocilpine-induced amnesia in rats in two tests: step-through inhibitory avoidance paradigm (SIAP) and transfer latency paradigm time (TLPT). In addition, favorable analgesic effects of compound 23 were observed in neuropathic pain models. Therefore, compound 23 is a particularly promising structure for further design of new MTDLs for AD.

The article 《Rational design of new multitarget histamine H3 receptor ligands as potential candidates for treatment of Alzheimer′s disease》 also mentions many details about this compound(111-24-0)Quality Control of 1,5-Dibromopentane, you can pay attention to it or contacet with the author([email protected]) to get more 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

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 111-24-0, is researched, Molecular C5H10Br2, about Preparation and study of spirocyclic cationic side chain functionalized polybiphenyl piperidine anion exchange membrane, the main research direction is polybiphenyl piperidine anion exchange membrane.Category: chiral-nitrogen-ligands.

Research on the ion conductivity and mech. stability of anion exchange membranes (AEMs) has achieved great progress, it is more urgent to prepare AEMs with high alkali stability. Azaspirocyclic cations are among the most alkali-stable cations. In this study, a synthesized long-chain 3-(3-(1-(8-bromooctyl) piperidin-4-yl) propyl)-6-azaspiro[5.5] undecan-6-ium bromide(BOP-ASU) cation was introduced into a portion of a piperidine ring on a PBP backbone to prepare PBP-BOP-ASU, and AEMs based on PBP-ASU and PBP-BOP-ASU were prepared The structure of each product was characterized (1H NMR, MS), and the prepared anion exchange membrane was also characterized using micromorphol. (SEM, TEM, AFM) and performance tests (TGA, WU, SR, ion conductivity, alkali stability). The PBP-BOP-ASU (8% membrane) showed the highest ion conductivity (117.43 mS/cm) at 80 °C. In addition, it showed excellent alkali stability in a test environment of 2 M NaOH solution at 80 °C for 1400 h. Moreover, the introduction of side chain spiro cations could improve the microscopic phase separation structure of the AEMs, and it also increased their ionic conductivity, thus ensuring the potential for their application in anion exchange membrane fuel cells.

The article 《Preparation and study of spirocyclic cationic side chain functionalized polybiphenyl piperidine anion exchange membrane》 also mentions many details about this compound(111-24-0)Category: chiral-nitrogen-ligands, you can pay attention to it, because details determine success or failure

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

Category: chiral-nitrogen-ligands. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Synthesis of alkyl/aryl linked binuclear silver(I)-N-Heterocyclic carbene complexes and evaluation of their antimicrobial, hemolytic and thrombolytic potential. Author is Habib, Aqsa; Iqbal, Muhammad Adnan; Bhatti, Haq Nawaz; Kamal, Amna; Kamal, Shagufta.

A new series of N-Heterocyclic carbene based ligands and their silver(I) complexes was obtained and tested in vitro on three bacterial strains (Bacillus subtillis, Bacillus cereus and Macrococcus brunensis) to assess their antibacterial potential. Hemolytic and thrombolytic activities of ligands and complexes on normal mouse erythrocytes were also assessed. In vitro antibacterial study of ligands and complexes revealed that the complexes are relatively more antibiotically active than the ligands. Zones of inhibition and MIC values revealed that B. subtillis is more sensitive to complexes than B. cereus and M. brunensis while reverse is the case for NHC salts. Hemolytic and thrombolytic assays revealed that the compounds are safe to mouse blood for pre-clin. trials.

The article 《Synthesis of alkyl/aryl linked binuclear silver(I)-N-Heterocyclic carbene complexes and evaluation of their antimicrobial, hemolytic and thrombolytic potential》 also mentions many details about this compound(111-24-0)Category: chiral-nitrogen-ligands, you can pay attention to it, because details determine success or failure

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

Category: chiral-nitrogen-ligands. 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: 2-Chloro-5-pyridinesulfonyl chloride, is researched, Molecular C5H3Cl2NO2S, CAS is 6684-39-5, about Antidiabetic effects of glucokinase regulatory protein small-molecule disruptors. Author is Lloyd, David J.; St. Jean, David J. Jr.; Kurzeja, Robert J. M.; Wahl, Robert C.; Michelsen, Klaus; Cupples, Rod; Chen, Michelle; Wu, John; Sivits, Glenn; Helmering, Joan; Komorowski, Renee; Ashton, Kate S.; Pennington, Lewis D.; Fotsch, Christopher; Vazir, Mukta; Chen, Kui; Chmait, Samer; Zhang, Jiandong; Liu, Longbin; Norman, Mark H.; Andrews, Kristin L.; Bartberger, Michael D.; Van, Gwyneth; Galbreath, Elizabeth J.; Vonderfecht, Steven L.; Wang, Minghan; Jordan, Steven R.; Veniant, Murielle M.; Hale, Clarence.

Glucose homeostasis is a vital and complex process, and its disruption can cause hyperglycemia and type II diabetes mellitus. Glucokinase (GK), a key enzyme that regulates glucose homeostasis, converts glucose to glucose-6-phosphate in pancreatic β-cells, liver hepatocytes, specific hypothalamic neurons, and gut enterocytes. In hepatocytes, GK regulates glucose uptake and glycogen synthesis, suppresses glucose production, and is subject to the endogenous inhibitor GK regulatory protein (GKRP). During fasting, GKRP binds, inactivates and sequesters GK in the nucleus, which removes GK from the gluconeogenic process and prevents a futile cycle of glucose phosphorylation. Compounds that directly hyperactivate GK (GK activators) lower blood glucose levels and are being evaluated clin. as potential therapeutics for the treatment of type II diabetes mellitus. However, initial reports indicate that an increased risk of hypoglycemia is associated with some GK activators. To mitigate the risk of hypoglycemia, the authors sought to increase GK activity by blocking GKRP. Here the authors describe the identification of two potent small-mol. GK-GKRP disruptors (AMG-1694 and AMG-3969) that normalized blood glucose levels in several rodent models of diabetes. These compounds potently reversed the inhibitory effect of GKRP on GK activity and promoted GK translocation both in vitro (isolated hepatocytes) and in vivo (liver). A co-crystal structure of full-length human GKRP in complex with AMG-1694 revealed a previously unknown binding pocket in GKRP distinct from that of the phosphofructose-binding site. Furthermore, with AMG-1694 and AMG-3969 (but not GK activators), blood glucose lowering was restricted to diabetic and not normoglycemic animals. These findings exploit a new cellular mechanism for lowering blood glucose levels with reduced potential for hypoglycemic risk in patients with type II diabetes mellitus.

The article 《Antidiabetic effects of glucokinase regulatory protein small-molecule disruptors》 also mentions many details about this compound(6684-39-5)Category: chiral-nitrogen-ligands, you can pay attention to it, because details determine success or failure

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 chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about How does methylviologen cation radical supply two electrons to the formate dehydrogenase in the catalytic reduction process of CO2 to formate, the main research direction is methylviologen radical electron supply formate dehydrogenase carbon dioxide reduction; carbon dioxide catalytic reduction formate mechanism density functional theory.Recommanded Product: 111-24-0.

Formate dehydrogenase from Candida boidinii (CbFDH) is a com. available enzyme and can be easily handled as a catalyst for the CO2 reduction to formate in the presence of NADH, single-electron reduced methylviologen (MV+. ) and so on. It was found that the formate oxidation to CO2 with CbFDH was suppressed using the oxidized MV as a co-enzyme and the single-electron reduced MV (MV+. ) was effective for the catalytic activity of CbFDH for the CO2 reduction to formate compared with that using the natural co-enzyme of NADH. The CO2 reduction to formate catalyzed by CbFDH requires two mols. of the MV+. . In order to clarify the two-electron reduction process using MV+. in the CO2 reduction to formate catalyzed with CbFDH, we attempted enzyme reaction kinetics, electrochem. and quantum chem. analyses. Kinetic parameters obtained from the enzymic kinetic anal. metric revealed an index of affinity of MV+. for CbFDH in the CO2 reduction to formate. From the results of the electrochem. anal., it was predicted that only one mol. of MV+. was bound to CbFDH, and the MV bound to CbFDH was to be necessarily re-reduced by the electron source outside of CbFDH to supply the second electron in the CO2 reduction to formate.

The article 《How does methylviologen cation radical supply two electrons to the formate dehydrogenase in the catalytic reduction process of CO2 to formate》 also mentions many details about this compound(111-24-0)Recommanded Product: 111-24-0, you can pay attention to it, because details determine success or failure

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

Name: 1,5-Dibromopentane. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Study of Reaction Rate between Zinc(II)-Histidine [Zn(II)-his]+ Complex and Ninhydrin: Effect of Three Dicationic Gemini (Alkanediyl-α,ω-Type) Surfactants. Author is Kumar, Dileep; Rub, Malik Abdul.

Reaction rate between Zn(II)-histidine and ninhydrin in three dicationic gemini (alkanediyl-α,ω-type) surfactants has been investigated at 343 K by spectroscopic methods. The first- and fractional-order dependencies of the reaction rate on concentration of [Zn(II)-his]+ complex and ninhydrin, resp., have been detected. Critical micellar concentrations of pure surfactants and their mixtures were determined with the help of conductometry. Effects of all three gemini (alkanediyl-α,ω-type) surfactants on the rate at different concentrations were studied.

The article 《Study of Reaction Rate between Zinc(II)-Histidine [Zn(II)-his]+ Complex and Ninhydrin: Effect of Three Dicationic Gemini (Alkanediyl-α,ω-Type) Surfactants》 also mentions many details about this compound(111-24-0)Name: 1,5-Dibromopentane, you can pay attention to it, because details determine success or failure

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

Synthetic Route of C5H10Br2. 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. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Kinetic study of the metal-dipeptide complex with ninhydrin facilitated by gemini (m-s-m) surfactant micelles.

The three Gemini (m-s-m; m (head group) = 16 and s (spacer) = 4, 5, 6) surfactants have been synthesized and their impact on reaction of zinc(II)-glycylleucine complex ([Zn(II)-Gly-Leu]+) and ninhydrin were studied at temperature (343 K) and pH (5.0) using spectroscopic method. Influence of several factors, viz., [Zn(II)-Gly-Leu]+, [ninhydrin], temperature and pH were also carried out on title reaction in geminis. Rates of reaction are the first-order path in concentration of [Zn(II)-Gly-Leu]+ complex and fractional order path in concentration of ninhydrin. The catalysis of gemini 16-s-16 surfactant micelles was investigated below and above their critical micelle concentration (cmc) value and detailed elaboration were provided in the text. In the present case, rate constants, kψ, increased on increasing geminis ([gemini] are below their cmc, region I) and stayed nearly constant (region II). The shape of (region I and II) surfactants ([gemini] = 0 to 400 × 10-5 mol dm-3) are similar to a cetyltrimethylammonium bromide, CTAB (single hydrophilic head group and hydrophobic part). Later, a sharp increment in rate was observed with higher [gemini] (region III, (Fig. 5)). The study was catalyzed and accelerated quite enough by geminis (at concentrations below their cmc) compared to aqueous An appropriate mechanism has been proposed for accounting for the distribution of reactants between aqueous and micellar pseudo phases. Resulting kinetic data were used to determine the binding constants of micelle-substrate (KB) and micelle-ninhydrin (KNin).

The article 《Kinetic study of the metal-dipeptide complex with ninhydrin facilitated by gemini (m-s-m) surfactant micelles》 also mentions many details about this compound(111-24-0)Synthetic Route of C5H10Br2, you can pay attention to it or contacet with the author([email protected]) to get more 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