Category: imidazoles-derivatives

Iddon, Brian; Lim, Bee Lan published the artcile< Metal-halogen exchange reactions of mono- and polyhaloimidazoles>, Application In Synthesis of 1003-21-0, the main research area is exchange lithium halogen haloimidazole; haloimidazole lithiation alkylation; imidazole halo lithiation alkylation; ethoxymethylation lithiation haloimidazole; sulfuration lithiation haloimidazole; alkylhaloimidazole; methylthiophenylthioimidazole; phenylthioimidazole.

Treatment of 4(5)-bromoimidazole with 1-2 equiv BuLi in Et2O or THF followed by reaction with Me2SO4 gave 46-63% of a 1:1-3 mixture of 4- and 5-bromo-1-methylimidazole, resp. 5-Iodo- and 2,4,5-tribromo-1-methylimidazole were similarly prepared N-1-alkylation of tribromoimidazole with ClCH2OEt in C6H6 containing Et3N gave 2,4,5-tribromo-1-(ethoxymethyl)imidazole (I). Similar reaction of 2,4,5-triiodoimidazole required NaOMe in dioxane and gave mainly 1-ethoxymethyl-4,5-diiodoimidazole. Treatment of I with BuLi followed by (PhS)2 gave 67% 4,5-dibromo-1-(ethoxymethyl)-2-phenylthioimidazole, which on further treatment with BuLi followed by (MeS)2 gave 63% 4-bromo-1-(ethoxymethyl)-5-methylthio-2-phenylthioimidazole.

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) published new progress about Alkylation. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Application In Synthesis of 1003-21-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Czernecki, Dariusz; Legrand, Pierre; Tekpinar, Mustafa; Rosario, Sandrine; Kaminski, Pierre-Alexandre; Delarue, Marc published the artcile< How cyanophage S-2L rejects adenine and incorporates 2-aminoadenine to saturate hydrogen bonding in its DNA>, Recommanded Product: 7H-Purin-2-amine, the main research area is .

Abstract: Bacteriophages have long been known to use modified bases in their DNA to prevent cleavage by the host′s restriction endonucleases. Among them, cyanophage S-2L is unique because its genome has all its adenines (A) systematically replaced by 2-aminoadenines (Z). Here, we identify a member of the PrimPol family as the sole possible polymerase of S-2L and we find it can incorporate both A and Z in front of a T. Its crystal structure at 1.5 Å resolution confirms that there is no structural element in the active site that could lead to the rejection of A in front of T. To resolve this contradiction, we show that a nearby gene is a triphosphohydolase specific of dATP (DatZ), that leaves intact all other dNTPs, including dZTP. This explains the absence of A in S-2L genome. Crystal structures of DatZ with various ligands, including one at sub-angstrom resolution, allow to describe its mechanism as a typical two-metal-ion mechanism and to set the stage for its engineering.

Nature Communications published new progress about 452-06-2. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Recommanded Product: 7H-Purin-2-amine.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Nejad, Maryam Imani; Price, Nathan E.; Haldar, Tuhin; Lewis, Calvin; Wang, Yinsheng; Gates, Kent S. published the artcile< Interstrand DNA cross-links derived from reaction of a 2-aminopurine residue with an abasic site>, Electric Literature of 452-06-2, the main research area is interstrand DNA crosslink derived reaction aminopurine abasic.

Efficient methods for the site-specific installation of structurally-defined interstrand crosslinks in duplex DNA may be useful in a wide variety of fields. The work described here developed a high-yield synthesis of chem. stable interstrand crosslinks resulting from a reductive amination reaction between an abasic site and the noncanonical nucleobase 2-aminopurine in duplex DNA. Results from footprinting, LC-MS, and stability studies support the formation of an N2-alkylamine attachment between the 2-aminopurine residue and the Ap site. The reaction performs best when the 2-aminopurine residue on the opposing strand is offset 1 nt to the 5′-side of the abasic site. The crosslink confers substantial resistance to thermal denaturation (melting). The crosslinking reaction is fast (complete in 4 h), employs only com. available reagents, and can be used to generate crosslinked duplexes in sufficient quantities for biophys., structural, and DNA repair studies.

ACS Chemical Biology published new progress about DNA damage. 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

Bethel, Paul A.; Campbell, Andrew D.; Goldberg, Frederick W.; Kemmitt, Paul D.; Lamont, Gillian M.; Suleman, Abid published the artcile< Optimized scale up of 3-pyrimidinylpyrazolo[1,5-a]pyridine via Suzuki coupling; a general method of accessing a range of 3-(hetero)arylpyrazolo[1,5-a]pyridines>, Computed Properties of 1003-21-0, the main research area is Suzuki coupling pyrazolopyridine boronic ester; pyrazolopyridine heteroaryl aryl preparation.

We have developed an improved synthesis of 3-(hetero)aryl pyrazolo[1,5-a]pyridines [such as 3-(2,5-dichloropyrimidin-4-yl)pyrazolo[1,5-a]pyridine (I)] via an optimized synthesis and Suzuki coupling of 3-pyrazolo[1,5-a]pyridine boronic ester (II). These conditions are applicable to both high throughput chem. and large scale synthesis of these medicinally important compounds The scope of this chem. has been further extended to include the synthesis and coupling of a novel boronic ester, 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazine.

Tetrahedron published new progress about Heterocyclic compounds Role: RCT (Reactant), RACT (Reactant or Reagent) (halo). 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Computed Properties of 1003-21-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Xu, Feng; Zhong, Jia-Yu; Lin, Xiao; Shan, Su-Kang; Guo, Bei; Zheng, Ming-Hui; Wang, Yi; Li, Fuxingzi; Cui, Rong-Rong; Wu, Feng; Zhou, En; Liao, Xiao-Bo; Liu, You-Shuo; Yuan, Ling-Qing published the artcile< Melatonin alleviates vascular calcification and ageing through exosomal miR-204/miR-211 cluster in a paracrine manner>, Category: imidazoles-derivatives, the main research area is melatonin vascular calcification ageing paracrine manner exosomal miR cluster; BMP2; ageing; exosomes; melatonin; miR-204/miR-211; vascular calcification.

In the elderly with atherosclerosis, hypertension and diabetes, vascular calcification and ageing are ubiquitous. Melatonin (MT) has been demonstrated to impact the cardiovascular system. In this study, we have shown that MT alleviates vascular calcification and ageing, and the underlying mechanism involved. We found that both osteogenic differentiation and senescence of vascular smooth muscle cells (VSMCs) were attenuated by MT in a MT membrane receptor-dependent manner. Moreover, exosomes isolated from VSMCs or calcifying vascular smooth muscle cells (CVSMCs) treated with MT could be uptaken by VSMCs and attenuated the osteogenic differentiation and senescence of VSMCs or CVSMCs, resp. Moreover, we used conditional medium from MT-treated VSMCs and Transwell assay to confirm exosomes secreted by MT-treated VSMCs attenuated the osteogenic differentiation and senescence of VSMCs through paracrine mechanism. We also found exosomal miR-204/miR-211 mediated the paracrine effect of exosomes secreted by VSMCs. A potential target of these two miRs was revealed to be BMP2. Furthermore, treatment of MT alleviated vascular calcification and ageing in 5/6-nephrectomy plus high-phosphate diet-treated (5/6 NTP) mice, while these effects were partially reversed by GW4869. Exosomes derived from MT-treated VSMCs were internalised into mouse artery detected by in vivo fluorescence image, and these exosomes reduced vascular calcification and ageing of 5/6 NTP mice, but both effects were largely abolished by inhibition of exosomal miR-204 or miR-211. In summary, our present study revealed that exosomes from MT-treated VSMCs could attenuate vascular calcification and ageing in a paracrine manner through an exosomal miR-204/miR-211.

Journal of Pineal Research published new progress about Aging, animal. 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Category: imidazoles-derivatives.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Malina, Jaroslav; Kostrhunova, Hana; Scott, Peter; Brabec, Viktor published the artcile< FeII Metallohelices Stabilize DNA G-Quadruplexes and Downregulate the Expression of G-Quadruplex-Regulated Oncogenes>, Recommanded Product: 7H-Purin-2-amine, the main research area is Fe Metallohelices DNA G quadruplexes oncogenes; DNA; G-quadruplexes; metalo-supramolecular helicates; multitargeted agens; oncogenes.

DNA G-quadruplexes (G4s) have been identified within the promoter regions of many proto-oncogenes. Thus, G4s represent attractive targets for cancer therapy, and the design and development of new drugs as G4 binders is a very active field of medicinal chem. Here, mol. biophysics and biol. methods were employed to investigate the interaction of chiral metallohelices with a series of four DNA G4s (hTelo, c-myc, c-kit1, c-kit2) that are formed by the human telomeric sequence (hTelo) and in the promoter regions of c-MYC and c-KIT proto-oncogenes. We show that the investigated water-compatible, optically pure metallohelices, which are made by self-assembly of simple nonpeptidic organic components around FeII ions and exhibit bioactivity emulating the natural systems, bind with high affinity to G4 DNA and much lower affinity to duplex DNA. Notably, both enantiomers of a metallohelix containing a m-xylenyl bridge (5 b) were found to effectively inhibit primer elongation catalyzed by Taq DNA polymerase by stabilizing G4 structures formed in the template strands containing c-myc and c-kit2 G4-forming sequences. Moreover, both enantiomers of 5 b downregulated the expression of c-MYC and c-KIT oncogenes in human embryonic kidney cells at mRNA and protein levels. As metallohelices also bind alternative nucleic acid structures, they hold promise as potential multitargeted drugs.

Chemistry – A European Journal published new progress about Animal gene Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study) (c-kit1). 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Recommanded Product: 7H-Purin-2-amine.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Rizzo, Carla; Marullo, Salvatore; Feroci, Marta; Accurso, Vincenza; D’Anna, Francesca published the artcile< Insights into the effect of the spacer on the properties of imidazolium based AIE luminogens>, Category: imidazoles-derivatives, the main research area is imidazolium based aggregation induced emission luminogen preparation self assembly.

With the aim to obtain organic salts with potential applications in high performance mol. electronics, we combined properties of π-conjugated spacers, like 1,4-diethynylbenzene and 1,6-diethynylpyrene, with the ones of both imidazole and imidazolium units. Physico-chem. properties of obtained fluorescent organic salts were investigated performing thermo-gravimetric anal. (TGA), differential scanning calorimetry (DSC) and cyclic voltammetry measurements (CV). Photophys. behavior of the salts was analyzed in conventional solvents and ionic liquids, by UV-vis and fluorescence investigation. Solution phase aggregation study revealed that these salts self-assemble in conventional solvents and ionic liquids, leading to aggregation induced emission processes. Notably, emission was maintained also in the solid state, with higher or lower intensity compared with the solution, depending on which spacer is present. This latter, also impacts on the morphol. of the aggregates, allowing fine tuning the properties of the supramol. materials formed.

Dyes and Pigments published new progress about Aggregation. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Category: imidazoles-derivatives.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Murao, Atsushi; Tan, Chuyi; Jha, Alok; Wang, Ping; Aziz, Monowar published the artcile< Exosome-mediated eCIRP release from macrophages to induce inflammation in sepsis>, Application In Synthesis of 6823-69-4, the main research area is inflammation sepsis exosome extracellular cold inducible RNA binding protein; cytokines; eCIRP; exosomes; macrophage; neutrophil; sepsis.

Extracellular cold-inducible RNA-binding protein (eCIRP) is an important damage-associated mol. pattern (DAMP). Despite our understanding of the potentially harmful effects of eCIRP in sepsis, how eCIRP is released from cells remains elusive. Exosomes are endosome-derived extracellular vesicles, which carry proteins, lipids, and nucleic acids to facilitate intercellular communication and several extracellular functions. We hypothesized that eCIRP is released via exosomes to induce inflammation in sepsis. Exosomes isolated from the supernatants of LPS-treated macrophage culture and serum of endotoxemia and polymicrobial sepsis mice showed high purity, as revealed by their unique median sizes ranging between 70 and 126 nm in diameter eCIRP levels of the exosomes were significantly increased after LPS treatment in the supernatants of macrophage culture, mouse serum, and cecal ligation and puncture (CLP)-induced sepsis mouse serum. Protease protection assay demonstrated the majority of eCIRP was present on the surface of exosomes. Treatment of WT macrophages and mice with exosomes isolated from LPS-treated WT mice serum increased TNFα and IL-6 production However, treatment with CIRP-/- mice serum exosomes significantly decreased these levels compared with WT exosome-treated conditions. CIRP-/- mice serum exosomes significantly decreased neutrophil migration in vitro compared with WT exosomes. Treatment of mice with serum exosomes isolated from CIRP-/- mice significantly reduced neutrophil infiltration into the peritoneal cavity. Our data suggest that eCIRP can be released via exosomes to induce cytokine production and neutrophil migration. Thus, exosomal eCIRP could be a potential target to inhibit inflammation.

Frontiers in Pharmacology published new progress about Binding energy. 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

Grob, Jonathan E.; Nunez, Jill; Dechantsreiter, Michael A.; Hamann, Lawrence G. published the artcile< One-pot reductive amination and Suzuki-Miyaura cross-coupling of formyl aryl and heteroaryl MIDA boronates in array format>, Related Products of 1003-21-0, the main research area is arylmethylpyrrolidinylmethanol amine derivative preparation; aryl MIDA boronate preparation aryl halide amination Suzuki reaction; boronic acid MIDA.

Formyl-substituted aryl and heteroaryl MIDA boronates were prepared by a DMSO-free method and used in the first reported one-pot reductive amination-Suzuki-Miyaura cross-coupling sequence. This sequence was then carried out in parallel array format, using microwave-assisted in situ release cross-coupling of MIDA boronates to generate a library with diversity along two axes, affording rapid and convenient access to an array of druglike mols.

Journal of Organic Chemistry published new progress about Aryl halides Role: RCT (Reactant), RACT (Reactant or Reagent). 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Related Products of 1003-21-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Ford, Jodi L; Browning, Christopher R published the artcile< Effects of exposure to violence with a weapon during adolescence on adult hypertension.>, HPLC of Formula: 1003-21-0, the main research area is Adverse childhood experiences; Exposure to violence; Hypertension; Victimization; Witnessed violence.

OBJECTIVES: To examine the longitudinal associations between exposure to violence with a weapon during the past year among adolescents and hypertension during adulthood, including the extent to which adult cardiovascular risk factors mediated the association. METHODS: Secondary analysis of the National Longitudinal Study of Adolescent Health, 1994-2008. The sample included 3555 male and 4416 female participants who were aged 11-17 years at wave 1 (1994-1995). Participants were categorized as hypertensive if they had a mean systolic blood pressure of 140 mm Hg or higher or a mean diastolic pressure of 90 mm Hg or higher at wave 4 (2008). Witnessed violence with a weapon was defined as having seen a shooting or stabbing during the year before wave 1, whereas victim of violence with a weapon was defined as having been shot, cut, or stabbed or had a gun or knife drawn on them during the year before wave 1. Potential mediators of adult cardiovascular risk (wave 4) included body mass index, daily smoking, alcohol abuse, and depression. RESULTS: Males who witnessed violence and females who were victims of violence in the year before wave 1 had an increased odds of hypertension at wave 4 compared with their unexposed peers (adjusted odds ratio, 1.45; 95% confidence interval, 1.003-2.10 and adjusted odds ratio, 1.72; 95% confidence interval, 1.04-2.84, respectively). The hypothesized adult cardiovascular risk mediators did not significantly attenuate the associations for either the male or female samples. CONCLUSIONS: Interventions addressing prior violence exposure are needed to promote adult cardiovascular health.

Annals of epidemiology published new progress about 1003-21-0. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, HPLC of Formula: 1003-21-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem