Category: imidazoles-derivatives

Wang, Lei; Duan, Lele; Stewart, Beverly; Pu, Maoping; Liu, Jianhui; Privalov, Timofei; Sun, Licheng published the artcile< Toward Controlling Water Oxidation Catalysis: Tunable Activity of Ruthenium Complexes with Axial Imidazole/DMSO Ligands>, Formula: C4H5BrN2, the main research area is controlling water oxidation catalysis tunable activity; ruthenium complex axial imidazole DMSO ligand.

Using the combinations of imidazole and DMSO (DMSO) as axial ligands and 2,2′-bipyridine-6,6′-dicarboxylate (bda) as the equatorial ligand, we have synthesized six novel ruthenium complexes with noticeably different activity as water oxidation catalysts (WOCs). In four Cs sym. RuII(κ3-bda)(DMSO)L2 complexes L = imidazole (1), N-methylimidazole (2), 5-methylimidazole (3), and 5-bromo-N-methylimidazole (4). Addnl., in two C2v sym. RuII(κ4-bda)L2 complexes L = 5-nitroimidazole (5) and 5-bromo-N-methylimidazole (6), i.e., fully equivalent axial imidazoles. A detailed characterization of all complexes and the mechanistic investigation of the catalytic water oxidation have been carried out with a number of exptl. techniques, i.e., kinetics, electrochem. and high resolution mass spectrometry (HR-MS), and d. functional theory (DFT) calculations We have observed the in situ formation of a RuII-complex with the accessible seventh coordination position. The measured catalytic activities and kinetics of complex 1-6 revealed details about an important structure-activity relation: the connection between the nature of axial ligands in the combination and either the increase or decrease of the catalytic activity. In particular, an axial DMSO group substantially increases the turnover frequency of WOCs reported in the article, with the ruthenium-complex having one axial 5-bromo-N-methyl-imidazole and one axial DMSO (4), we have obtained a high initial turnover frequency of ∼180 s-1. DFT modeling of the binuclear reaction pathway of the O-O bond formation in catalytic water oxidation further corroborated the concept of the mechanistic significance of the axial ligands and rationalized the exptl. observed difference in the activity of complexes with imidazole/DMSO and imidazole/imidazole combinations of axial ligands.

Journal of the American Chemical Society published new progress about Bond angle. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Formula: C4H5BrN2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Kaiser, Carl; Spagnuolo, Ciro J.; Adams, Theodore C. Jr.; Audia, Vicki H.; Dupont, Andrea C.; Hatoum, Holia; Lowe, Valerie C.; Prosser, Judith C.; Sturm, Bonnie L.; Noronha-Blob, Lalita published the artcile< Synthesis and antimuscarinic properties of some N-substituted 5-(aminomethyl)-3,3-diphenyl-2(3H)-furanones>, SDS of cas: 36947-69-0, the main research area is aminomethyldiphenylfuranone antimuscarinic structure activity; furanone aminomethyldiphenyl antimuscarinic structure activity; urinary incontinence treatment imidazolylmethyldiphenylfuranone; benactyzine constrained analog structure activity.

In a study aimed toward developing new, selective antimuscarinic drugs with potential utility in the treatment of urinary incontinence associated with bladder muscle instability, a series of N-substituted 5-(aminomethyl)-3,3-diphenyl-2(3H)-furanones I (R = Me, R1 = alkyl, aralkyl; R = R1 = Et, Pr; NRR1 = pyrrolidino, N-methylpiperazino, N-phenylpiperazino, morpholino, substituted imidazol-1-yl, substituted pyrazol-1-yl, triazol-1-yl, substituted imidazopyridin-1-yl, etc.), conformationally-constrained lactone relatives of benactyzine, was prepared The compounds were examined in several paradigms that measure muscarinic (M1, M2, and M3) receptor antagonist activity. Selected members of the series that displayed potency and/or selectivity in these tests were studied for their effects on urinary bladder contraction, mydriasis, and salivation in guinea pigs. These studies revealed that incorporation of the amino functionality into an imidazole or pyrazole ring resulted in some novel, potent, and selective antimuscarinic agents. Appropriate alkyl substitution of position 2 of the imidazole strikingly affected muscarinic, particularly M3, receptor activity and may reflect a complementary site of interaction. Some of the compounds selectively reduced bladder pressure in a cystometrogram (CMG) model without producing concomitant mydriatic and salivary effects. The sep. and distinct action of several compounds of this series in these in vivo protocols suggests the possibility of subtypes of muscarinic receptors that may correspond to previously characterized mol. cloned subpopulations. Structure-activity relationships of this series of substituted lactones are discussed. These studies led to the identification of (R)-isomer II as a clin. candidate for treating urinary bladder dysfunction.

Journal of Medicinal Chemistry published new progress about Muscarinic antagonists. 36947-69-0 belongs to class imidazoles-derivatives, and the molecular formula is C7H12N2, SDS of cas: 36947-69-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Yuan, Xiaoqiu; Li, Tiefeng; Shi, Lei; Miao, Jinhao; Guo, Yongfei; Chen, Yu published the artcile< Human umbilical cord mesenchymal stem cells deliver exogenous miR-26a-5p via exosomes to inhibit nucleus pulposus cell pyroptosis through METTL14/NLRP3>, Recommanded Product: p-Benzenediacrylanilide, 4′,4′′-di-2-imidazolin-2-yl-, dihydrochloride, the main research area is miR26a5p METTL14 NLRP3 IGF2BP2 GW4869 nucleus pulposus cell pyroptosis; Exosomal miR-26a-5p; Intervertebral disc degeneration; N6-methyladenosine; Pyroptosis; Umbilical cord mesenchymal stem cells.

Intervertebral disk degeneration (IVDD) is the breakdown of the disks supporting the vertebrae. It is one of the most frequent causes of back pain worldwide. Currently, the clin. interventions for IVDD are mainly focused on symptom releases. Thus, new therapeutic options are needed. Nucleus pulposus (NP) samples were obtained from 20 patients experiencing IVDD and 10 healthy volunteers compared for mRNA N6-methyladenosine (m6A) mRNA modification as well as methyltransferase (METT) like METTL3, METTL14, and Wilms’ tumor 1-associated protein mRNA and protein abundance following exosomes exposure from mesenchymal stem cells. In addition, microRNA expressions were also compared. The correlation between the NLR family pyrin domain containing 3 (NLRP3) and METTL14 was measured by luciferase reporter assay. Cytokines were evaluated using an ELISA. METTL14, NLRP3, and insulin-like growth factor 2 mRNA-binding protein 2 mRNAs were measured via a quant. reverse transcription-polymerase chain reaction. Protein was assayed using western blots. Cell death was assessed by propidium iodide staining, lactate dehydrogenase release, gasdermin-N domain abundance, and caspase-1 activation. The human umbilical cord mesenchymal stem cell (hucMSC) exosomes were found to effectively improve the viability of NP cells and protect them from pyroptosis through targeting METTL14, with a methyltransferase catalyzing m6A modification. METTL14 was highly present in NP cells from IVDD patients, which stabilize NLRP3 mRNA in an IGFBP2-dependent manner. The elevated NLRP3 levels result in the increase of interleukin 1β (IL-1β) and IL-18 levels and trigger pyroptotic NP cell death. Such pathogenic axis could be blocked by hucMSC exosomes, which directly degrade METTL14 through exosomal miR-26a-5p. The results of the current study revealed the beneficial effects of hucMSC exosomes on NP cells and determined a potential mechanism inducing IVDD.

Molecular Medicine (London, United Kingdom) published new progress about 3′-Untranslated region Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Recommanded Product: p-Benzenediacrylanilide, 4′,4′′-di-2-imidazolin-2-yl-, dihydrochloride.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Hornum, Mick; Stendevad, Julie; Sharma, Pawan K.; Kumar, Pawan; Nielsen, Rasmus B.; Petersen, Michael; Nielsen, Poul published the artcile< Base-Pairing Properties of Double-Headed Nucleotides>, Electric Literature of 452-06-2, the main research area is base pair double headed nucleotide DNA duplex; 2,6-diaminopurine; double-headed nucleotides; hypoxanthine; oligonucleotides.

Nucleotides that contain two nucleobases (double-headed nucleotides) have the potential to condense the information of two sep. nucleotides into one. This presupposes that both bases must successfully pair with a cognate strand. Here, double-headed nucleotides that feature cytosine, guanine, thymine, adenine, hypoxanthine, and diaminopurine linked to the C2′-position of an arabinose scaffold were developed and examined in full detail. These monomeric units were efficiently prepared by convergent synthesis and incorporated into DNA oligonucleotides by means of the automated phosphoramidite method. Their pairing efficiency was assessed by UV-based melting-temperature anal. in several contexts and extensive mol. dynamics studies. Altogether, the results show that these double-headed nucleotides have a well-defined structure and invariably behave as functional dinucleotide mimics in DNA duplexes.

Chemistry – A European Journal published new progress about DNA-DNA hybridization. 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

Hao, Xueyu; Wang, Chunyu; Wang, Yu; Li, Chunjie; Hou, Jingwei; Zhang, Feng; Kang, Chuanqing; Gao, Lianxun published the artcile< Topological conversion of human telomeric G-quadruplexes from hybrid to parallel form induced by naphthalene diimide ligands>, Name: 7H-Purin-2-amine, the main research area is naphthalene diimide G quadruplex telomere regulation; G-quadruplex; Human telomere; Naphthalene diimide; Topological conversion.

G-quadruplexes (GQs) have become promising anti-cancer therapeutic targets, which are formed by the folding of a guanine-rich repeat DNA/RNA sequence at human telomeres or oncogene promoters. Polymorphism has been observed for the folding topologies of intramol. GQs. Here we report the topol. conversion of human telomeric GQ induced by naphthalene diimide (NDI) ligands in K+ solution The ligands selectively induce metastable hybrid-type GQs to highly stable parallel-type GQ at physiol. temperature (37°C) in dilute aqueous solutions and under crowding conditions that mimic cellular bioenvironment. According to spectroscopic analyses, the topol. conversion is speculated to undergo stepwise unfolding of hybrid-type GQ through intermediate states to parallel-type GQ. The results will prompt further studies on the designs of ligands with GQ conformation regulation functions and nanotechnol. systems based on nucleic acids with dynamic regulation of GQ conformation.

International Journal of Biological Macromolecules published new progress about Animal gene, c-myc Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Carvalho, Thiago O.; Carvalho, Pedro H. P. R.; Correa, Jose R.; Guido, Bruna C.; Medeiros, Gisele A.; Eberlin, Marcos N.; Coelho, Sara E.; Domingos, Josiel B.; Neto, Brenno A. D. published the artcile< Palladium Catalyst with Task-Specific Ionic Liquid Ligands: Intracellular Reactions and Mitochondrial Imaging with Benzothiadiazole Derivatives>, Recommanded Product: 1-carboxymethyl-3-methylimidazolium chloride, the main research area is palladium catalyst ionic liquid ligand mitochondria imaging benzothiadiazole.

A water-soluble and charge-tagged palladium complex (PdMAI) was found to function inside breast cancer live cells of the MCF-7 lineage as an efficient catalyst for cross-coupling reaction. PdMAI, bearing two ionophilic task-specific ionic liquids as ligands, efficiently catalyzed both in cellulo Suzuki and Buchwald-Hartwig amination reactions. For the first time, therefore, the Buchwald-Hartwig amination is described to occur inside the highly complex cellular environment. The 2,1,3-benzothiadiazole (BTD) core was used as the base for the syntheses, and two π-extended fluorescent derivatives (BTD-2APy) and (BTD-1AN), which were found to emit in the green and red channels, had impressive mitochondrial affinity. These chromophores allowed for selective mitochondrial imaging and tracking.

Journal of Organic Chemistry published new progress about Benzothiadiazoles Role: BUU (Biological Use, Unclassified), SPN (Synthetic Preparation), BIOL (Biological Study), USES (Uses), PREP (Preparation). 700370-07-6 belongs to class imidazoles-derivatives, and the molecular formula is C6H9ClN2O2, Recommanded Product: 1-carboxymethyl-3-methylimidazolium chloride.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Li, Xianming; Yang, Hang; He, Jialun; Yang, Bin; Zhao, Yi; Wu, Peng published the artcile< Full liberation of 2-Aminopurine with nucleases digestion for highly sensitive biosensing>, Application of C5H5N5, the main research area is aminopurine nuclease digestion fluorescence biosensor lifetime DNA transformation; 2-Aminopurine; Fluorescence lifetime; Multiple labelling; Nuclease digestion.

2-Aminopurine (2-AP), a fluorescent isomer of adenine, is a popular fluorescent tag for DNA-based biosensors. The fluorescence of 2-AP is highly dependent on its microenvironment, i.e., almost non-fluorescent and merely fluorescent in dsDNA and ssDNA, resp., but can be greatly brightened as mononucleotide. In most 2-AP-based biosensors, DNA transformation from dsDNA to ssDNA was employed, while selective digestion of 2-AP-labeled DNA with nucleases represents an appealing approach for improving the biosensor sensitivity. However, some detailed fundamental information, such as the reason for nuclease digestion, the influence of the labeling site, neighboring bases, or the label number of 2-AP for final signal output, are still largely unknown, which greatly limits the utility of 2-AP-based biosensors. In this work, using both steady- and excited-state fluorescence (lifetime), we demonstrated that nuclease digestion resulted in almost full liberation of 2-AP mononucleotides, and was free from labeling site and neighboring bases. Furthermore, we also found that nuclease digestion could lead to multiplexed sensitivity from increasing number of 2-AP labeling, but was not achievable for the conventional biosensors without full liberation of 2-AP. Considering the popularity of 2-AP in biosensing and other related applications, the above obtained information in sensitivity boosting is fundamentally important for future design of 2-AP-based biosensors.

Biosensors & Bioelectronics published new progress about Biological digestion. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Application of C5H5N5.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Martinez-Fernandez, Lara; Arslancan, Serra; Ivashchenko, Dmytro; Crespo-Hernandez, Carlos E.; Corral, Ines published the artcile< Tracking the origin of photostability in purine nucleobases: the photophysics of 2-oxopurine>, Safety of 7H-Purin-2-amine, the main research area is photostability purine nucleobase photophysics oxopurine.

This work scrutinizes the relaxation mechanism of 2-oxopurine. Contrary to its ancestor, purine, which is a UVC chromophore, 2-oxopurine shows a red-shifted absorption spectrum centered in the UVA region. In 2-oxopurine, relaxation along the ππ* spectroscopic state directs the population from the Franck-Condon (FC) region towards a min., which acts as a crossroad for the further decay of the system either to triplet states or, alternatively, to the ground state through a C6-puckered S1/S0 funnel. A comparison of the optical properties and excited state potential energy surfaces of purine, 2-oxopurine, 2-aminopurine, 6-oxopurine and adenine, allows establishing how the position and nature of substituent tune the photophysics of purine. For this series, we conclude that both C2 and C6 substitution red shift the absorption spectrum of purine, with 2-oxo substitution exhibiting the largest shift. An important exception is the canonical nucleobase adenine, which presents a blue shifted absorption spectrum. The topog. of purine’s ππ* potential energy surface experiences major changes when functionalized at the C6 position. In particular, the disappearance of the min. along the ππ* potential energy surface efficiently funnels the excited state population from the FC region to the ground state and increases the photostability of 6-aminopurine (adenine) and 6-oxopurine (hypoxanthine) nucleobases.

Physical Chemistry Chemical Physics published new progress about Absorption spectra. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Safety of 7H-Purin-2-amine.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Wu, Xiaolin; Cao, Bo; Aquino, Patricia; Chiu, Tsu-Pei; Chen, Chao; Jiang, Susu; Deng, Zixin; Chen, Shi; Rohs, Remo; Wang, Lianrong; Galagan, James E.; Dedon, Peter C. published the artcile< Epigenetic competition reveals density-dependent regulation and target site plasticity of phosphorothioate epigenetics in bacteria>, Name: 7H-Purin-2-amine, the main research area is phosphorothioate epigenetics transcription regulation Salmonella; ChIP-seq; DNA modification; DNA target selection; epigenetics; restriction-modification.

Phosphorothioate (PT) DNA modifications-in which a nonbonding phosphate oxygen is replaced with sulfur-represent a widespread, horizontally transferred epigenetic system in prokaryotes and have a highly unusual property of occupying only a small fraction of available consensus sequences in a genome. Using Salmonella enterica as a model, we asked a question of fundamental importance: How do the PT-modifying DndA-E proteins select their GPSAAC/GPSTTC targets. Here, we applied innovative anal., sequencing, and computational tools to discover a novel behavior for DNA-binding proteins: The Dnd proteins are “”parked”” at the G6mATC Dam methyltransferase consensus sequence instead of the expected GAAC/GTTC motif, with removal of the 6mA permitting extensive PT modification of GATC sites. This shift in modification sites further revealed a surprising constancy in the d. of PT modifications across the genome. Computational anal. showed that GAAC, GTTC, and GATC share common features of DNA shape, which suggests that PT epigenetics are regulated in a d.-dependent manner partly by DNA shape-driven target selection in the genome.

Proceedings of the National Academy of Sciences of the United States of America published new progress about Animal gene Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study) (ang43). 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

Gate, G.; Williams, A.; Haggmark, M. R.; Svadlenak, N. D.; Hill, G.; De Vries, M. S. published the artcile< Nucleobases as molecular fossils of prebiotic photochemistry: excited-state dynamics of C2 and C6 substituted purines>, Application In Synthesis of 452-06-2, the main research area is nucleobase substituted purine mol fossil prebiotic dynamic photochem.

The nucleobases that are involved in replication exhibit short excited-state lifetimes which provide high intrinsic stability against otherwise harmful UV photo-damage. UV protection comes about when electronic excitation is converted to heat by internal conversion at rates too fast for other more harmful reactive pathways to occur while subsequently safely dissipating the energy to the environment. The canonical nucleobases generally decay in less than 1 ps, orders of magnitude faster than in most other heterocyclic compounds This property would have been highly advantageous for the first self-replicating mols. in prebiotic times before modern enzymic repair or the formation of the ozone layer that would later attenuate the high levels of UV radiation penetrating the early atm. The safe elimination of excess electronic energy in the canonical bases is exquisitely sensitive to mol. structure and much slower relaxation is observed in many closely related structures. These many variations of the canonical nucleobases, such as different derivatives and analogs, would likely have been present in a primordial soup. Alternative combinations of mol. building blocks would conceivably have been possible to for.

Comprehensive Series in Photochemical & Photobiological Sciences published new progress about Aquation. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Application In Synthesis of 452-06-2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem