Category: imidazoles-derivatives

Boulton, B. E.; Coller, B. A. W. published the artcile< Kinetics, stoichiometry, and mechanism in the bromination of aromatic heterocycles. II. Aqueous bromination of imidazole, 1-methylimidazole, and 2-methylimidazole>, Name: 5-Bromo-1-methyl-1H-imidazole, the main research area is imidazole bromination kinetics.

The coulo-chrono-potentiometric method was used to obtain rate constants for reaction of Br with neutral imidazoles (aqueous, 298°K). Positional reactivities of imidazole and 1-methylimidazole decreased in the order 5 > 4 > 2. The 5-position of 2-methylimidazole was the most reactive site.

Australian Journal of Chemistry published new progress about Bromination kinetics. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Name: 5-Bromo-1-methyl-1H-imidazole.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Kunz, Peter C.; Thiel, Indre; Noffke, Anna Louisa; Reiss, Guido J.; Mohr, Fabian; Spingler, Bernhard published the artcile< Ruthenium piano-stool complexes bearing imidazole-based PN ligands>, Electric Literature of 36947-69-0, the main research area is crystal structure imidazolylphosphine ruthenium half sandwich preparation catalyst hydration; mol structure imidazolylphosphine ruthenium half sandwich preparation catalyst hydration; imidazole imidazolylphosphine ruthenium preparation phosphorus NMR structure; alkyne hydration catalyst imidazolylphosphine ruthenium half sandwich.

A variety of piano-stool complexes of cyclopentadienyl Ru(II) with imidazole-based PN ligands were synthesized starting from the precursor complexes [CpRu(C10H8)]PF6, [CpRu(NCMe)3]PF6 and [CpRu(PPh3)2Cl]. PN ligands used are imidazol-2-yl, -4-yl and -5-yl phosphines. Depending on the ligand and precursor different types of coordination modes were observed; in the case of polyimidazolyl PN ligands these were κ1P-monodentate, κ2P,N-, κ2N,N- and κ3N,N,N-chelating and μ-κP:κ2N,N-bridging. The solid-state structures of [CpRu(1a)2Cl]·H2O (5·H2O, 1a = imidazol-2-yldiphenylphosphine), [{CpRu(μ-κP:κ2N,N-2b)}2](C6H5PO3H)2(C6H5PO3H2)2 (2b = bis(1-methylimidazol-2-yl)phenylphosphine), a hydrolysis product of the as well determined [{CpRu(μ-κP:κ2N,N-2b)}2](PF6)2·2MeCN (7b·2MeCN), [CpRu(κ1P-3a)(PPh3)]Cl·CH2Cl2 (9·CH2Cl2, 3a = tris(imidazol-2-yl)phosphine) and [CpRu(PPh3)2Cl]·CHCl3 were determined Furthermore, [CpRu(L)2]PF6 (L = imidazol-2-yl or imidazol-4-yl phosphine) were screened for their catalytic activity in the hydration of 1-octyne.

Journal of Organometallic Chemistry published new progress about Aromatic nitrogen heterocycles Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 36947-69-0 belongs to class imidazoles-derivatives, and the molecular formula is C7H12N2, Electric Literature of 36947-69-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Takahashi, Shogo; Togo, Hideo published the artcile< Efficient preparation of 2-imidazolines from aldehydes and ethylenediamines with 1,3-diiodo-5,5-dimethylhydantoin>, Application In Synthesis of 36947-69-0, the main research area is aldehyde ethylenediamine cyclization iodohydantoin; imidazoline preparation.

Various 2-imidazolines were prepared in high yields by reacting aldehydes and ethylenediamines with 1,3-diiodo-5,5-dimethylhydantoin. Moreover, chiral 1,3-diimidazolin-2-ylbenzene and 2,6-diimidazolin-2-ylpyridines, which function as a chiral ligand, could be directly obtained from corresponding dialdehydes in high yields.

Heterocycles published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 36947-69-0 belongs to class imidazoles-derivatives, and the molecular formula is C7H12N2, Application In Synthesis of 36947-69-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Bandela, Anil Kumar; Wagner, Nathaniel; Sadihov, Hava; Morales-Reina, Sara; Chotera-Ouda, Agata; Basu, Kingshuk; Cohen-Luria, Rivka; de la Escosura, Andres; Ashkenasy, Gonen published the artcile< Primitive selection of the fittest emerging through functional synergy in nucleopeptide networks>, Formula: C5H5N5, the main research area is functional synergy nucleopeptide network; chemical evolution; molecular networks; nucleic-acid–peptide conjugates; self-replication.

Many fundamental cellular and viral functions, including replication and translation, involve complex ensembles hosting synergistic activity between nucleic acids and proteins/peptides. There is ample evidence indicating that the chem. precursors of both nucleic acids and peptides could be efficiently formed in the prebiotic environment. Yet, studies on nonenzymic replication, a central mechanism driving early chem. evolution, have focused largely on the activity of each class of these mols. sep. We show here that short nucleopeptide chimeras can replicate through autocatalytic and cross-catalytic processes, governed synergistically by the hybridization of the nucleobase motifs and the assembly propensity of the peptide segments. Unequal assembly-dependent replication induces clear selectivity toward the formation of a certain species within small networks of complementary nucleopeptides. The selectivity pattern may be influenced and indeed maximized to the point of almost extinction of the weakest replicator when the system is studied far from equilibrium and manipulated through changes in the phys. (flow) and chem. (template and inhibition) conditions. We postulate that similar processes may have led to the emergence of the first functional nucleic-acid-peptide assemblies prior to the origin of life. Furthermore, spontaneous formation of related replicating complexes could potentially mark the initiation point for information transfer and rapid progression in complexity within primitive environments, which would have facilitated the development of a variety of functions found in extant biol. assemblies.

Proceedings of the National Academy of Sciences of the United States of America published new progress about Autocatalysis. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Formula: C5H5N5.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Vandendriessche, Charysse; Balusu, Sriram; Van Cauwenberghe, Caroline; Brkic, Marjana; Pauwels, Marie; Plehiers, Nele; Bruggeman, Arnout; Dujardin, Pieter; Van Imschoot, Griet; Van Wonterghem, Elien; Hendrix, An; Baeke, Femke; De Rycke, Riet; Gevaert, Kris; Vandenbroucke, Roosmarijn E. published the artcile< Importance of extracellular vesicle secretion at the blood-cerebrospinal fluid interface in the pathogenesis of Alzheimer's disease>, Application In Synthesis of 6823-69-4, the main research area is extracellular vesicle secretion blood cerebrospinal fluid Alzheimer disease pathogenesis; Alzheimer’s disease; Blood–cerebrospinal fluid barrier; Choroid plexus; Complement; Extracellular vesicles.

Increasing evidence indicates that extracellular vesicles (EVs) play an important role in the pathogenesis of Alzheimer’s disease (AD). We previously reported that the blood-cerebrospinal fluid (CSF) interface, formed by the choroid plexus epithelial (CPE) cells, releases an increased amount of EVs into the CSF in response to peripheral inflammation. Here, we studied the importance of CP-mediated EV release in AD pathogenesis. We observed increased EV levels in the CSF of young transgenic APP/PS1 mice which correlated with high amyloid beta (Aβ) CSF levels at this age. The intracerebroventricular (icv) injection of Aβ oligomers (AβO) in wild-type mice revealed a significant increase of EVs in the CSF, signifying that the presence of CSF-AβO is sufficient to induce increased EV secretion. Using in vivo, in vitro and ex vivo approaches, we identified the CP as a major source of the CSF-EVs. Interestingly, AβO-induced, CP-derived EVs induced pro-inflammatory effects in mixed cortical cultures. Proteome anal. of these EVs revealed the presence of several pro-inflammatory proteins, including the complement protein C3. Strikingly, inhibition of EV production using GW4869 resulted in protection against acute AβO-induced cognitive decline. Further research into the underlying mechanisms of this EV secretion might open up novel therapeutic strategies to impact the pathogenesis and progression of AD.

Acta Neuropathologica Communications published new progress about Alzheimer disease. 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Application In Synthesis of 6823-69-4.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Wang, Hongbin; Wei, Hong; Wang, Jingsong; Li, Lin; Chen, Anyue; Li, Zhigao published the artcile< MicroRNA-181d-5p-Containing Exosomes Derived from CAFs Promote EMT by Regulating CDX2/HOXA5 in Breast Cancer>, Safety of p-Benzenediacrylanilide, 4′,4′′-di-2-imidazolin-2-yl-, dihydrochloride, the main research area is gene expression CDX2 miR181d5p epithelial mesenchymal transition breast cancer; CDX2; HOXA5; breast cancer; cancer-associated fibroblasts; epithelial-mesenchymal transition; exosome; microRNA-181d-5p.

Recently, novel mechanisms underlying the pro-tumorigenic effects of cancer-associated fibroblasts (CAFs) have been identified in several cancers, including breast cancer. CAFs can secrete exosomes that are loaded with proteins, lipids, and RNAs to affect tumor microenvironment. Herein, we identify CAF-derived exosomes that can transfer miR-181d-5p to enhance the aggressiveness of breast cancer. Cancerous tissues and matched paracancerous tissues were surgically resected from 122 patients with breast cancer. Chromatin immunoprecipitation (ChIP) and dual luciferase reporter assays were employed to identify interaction between homeobox A5 (HOXA5) and caudal-related homeobox 2 (CDX2), as well as between CDX2 and miR-181d-5p, resp. Human breast cancer Michigan Cancer Foundation-7 (MCF-7) cells were cocultured with CAF-derived exosomes. 5-Ethynyl-2′-deoxyuridine (EdU) assay, TUNEL staining, Transwell invasion assays, and scratch tests were carried out to evaluate MCF-7 cell functions. Nude mice bearing xenografted MCF-7 cells were injected with CAF-derived exosomes, and the tumor formation was evaluated. HOXA5 expressed at a poor level in breast cancer tissues, and its overexpression retarded MCF-7 cell proliferation, invasion, migration, and epithelial-mesenchymal transition (EMT) and facilitated its apoptosis in vitro. miR-181d-5p targets CDX2, a transcription factor binding to HOXA5 promoter. Coculture of CAFs and MCF-7 cells showed that CAFs prolonged proliferation and antagonized apoptosis of MCF-7 cells via release of exosomes. Coculture of MCF-7 cells and exosomes derived from CAFs identified miR-181d-5p as a mediator of the exosomal effects on MCF-7 cells, in part, via downregulation of CDX2 and HOXA5. CAF-derived exosomes containing miR-181d-5p promoted the tumor growth of nude mice bearing xenografted MCF-7 cells. In conclusion, exosomal miR-181d-5p plays a key role in CAF-mediated effects on tumor environment in breast cancer, likely via CDX2 and HOXA5.

Molecular Therapy–Nucleic Acids published new progress about Antigens, Thy-1 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Safety of p-Benzenediacrylanilide, 4′,4′′-di-2-imidazolin-2-yl-, dihydrochloride.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Liu, Anqi; Jin, Shanshan; Fu, Cuicui; Cui, Shengji; Zhang, Ting; Zhu, Lisha; Wang, Yu; Shen, Steve G. F.; Jiang, Nan; Liu, Yan published the artcile< Macrophage-derived small extracellular vesicles promote biomimetic mineralized collagen-mediated endogenous bone regeneration>, Synthetic Route of 6823-69-4, the main research area is macrophage derived small extracellular vesicle mineralized collagen bone regeneration.

Macrophages play an important role in material-related immune responses and bone formation, but the functionality of macrophage-derived extracellular vesicles (EVs) in material-mediated bone regeneration is still unclear. Here, we evaluated intracellular communication through small extracellular vesicles (sEVs) and its effects on endogenous bone regeneration mediated by biomimetic intrafibrillarly mineralized collagen (IMC). After implantation in the bone defect area, IMC generated more neobone and recruited more mesenchymal stem cells (MSCs) than did extrafibrillarly mineralized collagen (EMC). More CD63+CD90+ and CD63+CD163+ cells were detected in the defect area in the IMC group than in the EMC group. To determine the functional roles of sEVs, extracellular vesicles from macrophages cultured on different mineralized collagen were isolated, and they showed no morphol. differences. However, macrophage-derived sEVs in the IMC group showed an enhanced Young’s modulus and exerted beneficial effects on the osteogenic differentiation of bone marrow MSCs by increasing the expression of the osteoblastic differentiation markers BMP2, BGLAP, COL1, and OSX and calcium nodule formation. Mechanistically, sEVs from IMC-treated macrophages facilitated MSC osteogenesis through the BMP2/Smad5 pathway, and blocking sEV secretion with GW4869 significantly impaired MSC proliferative, immunomodulative and osteogenic potential. Taken together, these findings show that macrophage-derived sEVs may serve as an emerging functional tool in biomaterial-mediated endogenous bone regeneration.

International Journal of Oral Science published new progress about Animal gene, COL1A1 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Synthetic Route of 6823-69-4.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Ambati, Srinivasa Rao; Patel, Jeevan Lal; Chandrakar, Komal; Sarkar, Uttam; Penta, Santhosh; Banerjee, Subhash; Varma, Rajender S. published the artcile< One-pot, three-component synthesis of novel coumarinyl-pyrazolo[3,4-b]pyridine-3-carboxylate derivatives using [AcMIm]FeCl4 as recyclable catalyst>, Application of C6H9ClN2O2, the main research area is benzylhydrazine cyano hydroxyacrylate coumarinyl acrylaldehyde ionic liquid multicomponent reaction; benzyl coumarinyl pyrazolopyridine carboxylate preparation green chem.

Multicomponent synthesis of novel coumarin-based fused pyrazolo[3,4-b]pyridine-3-carboxylate derivatives I [R = H, OH, F, CN; R1 = Me, Et, i-Pr, t-Bu; R2 = H, MeO, Br] was developed using acidic ionic liquid, 1-acyl-3-methylimidazolium tetrachloroferrate ([AcMIm]FeCl4) under mild and environmentally benign reaction conditions. The prepared [AcMIm]FeCl4 served as a catalyst as well as the reaction medium and was reused for at least four times without significant loss of yield. The ensuing compounds, I were identified by FT-IR, 1H NMR and 13C NMR and mass spectroscopic studies. The developed method offers several advantages such as a simple protocol, excellent yields of the products (90-92%), shorter reaction time (2 h), recyclability of the catalyst, eco-friendly reaction conditions and better values of green chem. metrics like low E factor (0.32), high reaction mass efficiency (75.28%), low process mass efficiency (1.32) and high atom economy (81.82).

Journal of Molecular Structure published new progress about Aliphatic acids, esters Role: SPN (Synthetic Preparation), PREP (Preparation). 700370-07-6 belongs to class imidazoles-derivatives, and the molecular formula is C6H9ClN2O2, Application of C6H9ClN2O2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Boehnke, Hendrik; Roettger, Katharina; Ingle, Rebecca A.; Marroux, Hugo J. B.; Bohnsack, Mats; Schwalb, Nina K.; Orr-Ewing, Andrew J.; Temps, Friedrich published the artcile< Electronic Relaxation Dynamics of UV-Photoexcited 2-Aminopurine-Thymine Base Pairs in Watson-Crick and Hoogsteen Conformations>, Electric Literature of 452-06-2, the main research area is electronic relaxation dynamics UV photoexcited aminopurine thymine base conformation.

The fluorescent analog 2-aminopurine (2AP) of the canonical nucleobase adenine (6-aminopurine) base-pairs with thymine (T) without disrupting the helical structure of DNA. It therefore finds frequent use in mol. biol. for probing DNA and RNA structures and conformational dynamics. However, detailed understanding of the processes responsible for fluorescence quenching remains largely elusive on a fundamental level. Although attempts have been made to ascribe decreased excited-state lifetimes to intrastrand charge-transfer and stacking interactions, possible influences from dynamic interstrand H-bonding have been widely ignored. Here, we investigate the electronic relaxation of UV-excited 2AP·T in Watson-Crick (WC) and Hoogsteen (HS) conformations. Although the WC conformation features slowed-down, monomer-like electronic relaxation in τ ∼ 1.6 ns toward ground-state recovery and triplet formation, the dynamics associated with 2AP·T in the HS motif exhibit faster deactivation in τ ∼ 70 ps. As recent research has revealed abundant transient interstrand H-bonding in the Hoogsteen motif for duplex DNA, the established model for dynamic fluorescence quenching may need to be revised in the light of our results. The underlying supramol. photophys. mechanisms are discussed in terms of a proposed excited-state double-proton transfer as an efficient deactivation channel for recovery of the HS species in the electronic ground state.

Journal of Physical Chemistry B published new progress about Double-stranded DNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Electric Literature of 452-06-2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

D’Souza, Sara; Miller, Justin E.; Ahn, Jenny; Subandi, Raechel; Lozano, Daniel; Ramirez, James; Goff, Marisa; Davidian, Christina; Miller, Jeffrey H. published the artcile< The antibiotic trimethoprim displays strong mutagenic synergy with 2-aminopurine>, Name: 7H-Purin-2-amine, the main research area is antibiotic; mutagenesis; synergy; trimethoprim.

We show that trimethoprim (TMP), an antibiotic in current use, displays a strong synergistic effect on mutagenesis in Escherichia coli when paired with the base analog 2-aminopurine (2AP), resulting in a 35-fold increase in mutation frequencies in the rpoB-Rifr system. Combination therapies are often employed both as antibiotic treatments and in cancer chemotherapy. However, mutagenic effects of these combinations are rarely examined An anal. of the mutational spectra of TMP, 2AP, and their combination indicates that together they trigger a response via an alteration in deoxynucleoside triphosphate (dNTP) ratios that neither compound alone can trigger. A similar, although less strong, response is seen with the frameshift mutagen ICR191 and 2AP. These results underscore the need for testing the effects on mutagenesis of combinations of antibiotics and chemotherapeutics.

Antimicrobial Agents and Chemotherapy published new progress about 452-06-2. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Name: 7H-Purin-2-amine.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem