Tag: 200-300

The author of 《Insignificant interference of Elevit in pregnant women serum samples with HBsAg immunoassay on Sysmex》 were Ning, Mingzhe; Chen, Yuxin; Zheng, Qisi; Jia, Jia; Bai, Bing. And the article was published in Journal of Clinical Laboratory Analysis in 2019. Quality Control of 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid The author mentioned the following in the article:

The pregnant women often take Elevit as the multivitamin supplement which has a substantial amount of biotin that might potentially interfere with the HBsAg immunoassay performed by the prevalent Sysmex system in clin. laboratories We therefore wanted to determine this, so that the therapeutic intervention on the hepatitis B virus infection during pregnancy and birth would not be missed. Elevit was both serially diluted in vitro and orally taken by healthy volunteers whose blood samples were then taken at different time points. All samples were added to a serum sample with a known result of HBsAg and then measured by Sysmex. The Abbott immunoassay system was used as the control as it involves no streptavidin-biotin binding in the reagent set. Besides, the HBsAg results were compared between the pregnant women taking or not taking Elevit. Biotin at 25 ng/mL in the Elevit started to suppress the HBsAg and reached about 50% suppression at 100 ng/mL on Sysmex. In the volunteers, biotin reached the peak concentration at 2 h. However, their blood samples showed no suppression on the HBsAg detection by Sysmex. In samples from pregnant women who took Elevit, the HBsAg results by Sysmex were highly correlated with those by Abbott (R2 = 0.96). Comparison of the results from Sysmex between the age- and pregnancy-matched females with and without Elevit intake showed no difference. Elevit intake in pregnant women shows no significant interference with HBsAg immunoassay on Sysmex. In the experiment, the researchers used many compounds, for example, 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5Quality Control of 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid)

5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5) may be used to elute proteins from avidin/streptavidin resins. It has been used for culturing of oligodendrocytes.Quality Control of 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid And it has been used for blocking endogenous biotin during immunohistology procedures.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Zhang, Lei; Chen, Xiaojie; Liu, Jun; Zhu, Qingzhang; Leng, Ying; Luo, Xiaomin; Jiang, Hualiang; Liu, Hong published their research in European Journal of Medicinal Chemistry on December 31 ,2012. The article was titled 《Discovery of novel dual-action antidiabetic agents that inhibit glycogen phosphorylase and activate glucokinase》.Synthetic Route of C8H4Cl4N2 The article contains the following contents:

Dual-target-directed agents simultaneously inhibiting glycogen phosphorylase (GP) and activating glucokinase (GK) could decelerate the inflow of glucose from glycogenolysis and accelerate the outflow of glucose in the liver, and therefore allow for better control over hyperglycemia in a synergetic manner. A series of hybrid compounds were designed by structure-assisted and ligand-based strategies. In vitro bioassays found two novel compounds I and II worthy of further optimization on balance of dual action to GP and GK. In addition, for single-target activity, two compounds exhibited more potent GP inhibitory activity and four compounds showed better GK activation than their corresponding references In the experiment, the researchers used many compounds, for example, 5-Chloro-2-(trichloromethyl)-1H-benzo[d]imidazole(cas: 3584-66-5Synthetic Route of C8H4Cl4N2)

5-Chloro-2-(trichloromethyl)-1H-benzo[d]imidazole(cas: 3584-66-5) belongs to imidazoles.Although other azole heterocycles are ubiquitous in a wide range of biologically active natural products, imidazole rings occur predominantly in the natural amino acid histidine. Synthetic Route of C8H4Cl4N2 In addition, imidazole rings are part of unnatural cyclic peptides and are used as ester isosteres in peptidomimetic studies.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Computed Properties of C9H13Cl2N3On March 1, 2009, Cariou, Renan; Gibson, Vernon C.; Tomov, Atanas K.; White, Andrew J. P. published an article in Journal of Organometallic Chemistry. The article was 《Group 4 metal complexes bearing new tridentate (NNO) ligands: Benzyl migration and formation of unusual C-C coupled products》. The article mentions the following:

Group 4 metal complexes bearing new phenoxy(benzimidazolyl)-imine, -amine and -amide ligands have been synthesized. A series of metal chloride derivatives has been prepared via treatment of MCl4(THF)2 (M = Ti, Zr, Hf) with the in situ generated sodium salt of the (benzimidazolyl)imine phenol 1. Reaction of the pro-ligand 2 with TiCl4(THF)2 afforded the corresponding complex 8 in which the amine proton remains bound to the nitrogen donor. Benzyl complexes of zirconium and hafnium were synthesized via treatment of pro-ligands 1 and 2 with M(CH2Ph)4 precursors. The complexes [NNO]M(CH2Ph)3 (6 M = Zr, 7 M = Hf) were found to undergo benzyl migration from the metal center to the imine carbon of the ligand backbone giving complexes 11 and 12; the migration follows first order kinetics. The reaction of 1 with Ti(NMe2)4 led to the formation of an unusual C-C coupled product in which a new piperazine ring has formed. Complexes 11 and 12 undergo related transformations, leading to analogous C-C coupled products which were characterized by x-ray crystallog. Deuterium labeling experiments were carried out to determine the mechanistic pathway of the reactions. Chloride and benzyl complexes 3-12 were screened as pre-catalysts for olefin polymerization The experimental process involved the reaction of [(1-Methyl-1H-benzimidazol-2-yl)methyl]amine dihydrochloride(cas: 53332-79-9Computed Properties of C9H13Cl2N3)

[(1-Methyl-1H-benzimidazol-2-yl)methyl]amine dihydrochloride(cas: 53332-79-9) belongs to imidazoles.Imidazole rings are also present in imidazole ring alkaloids, which are potential therapeutics for thrombosis, cancer and inflammatory diseases.Computed Properties of C9H13Cl2N3 Although other azole heterocycles are ubiquitous in a wide range of biologically active natural products, imidazole rings occur predominantly in the natural amino acid histidine.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Formula: C10H16N2O3SIn 2020 ,《Variability in Streptavidin-Sepharose Matrix Quality Can Significantly Affect Proximity-Dependent Biotinylation (BioID) Data》 was published in Journal of Proteome Research. The article was written by St-Germain, Jonathan R.; Samavarchi Tehrani, Payman; Wong, Cassandra; Larsen, Brett; Gingras, Anne-Claude; Raught, Brian. The article contains the following contents:

Due to their ease of use and high binding affinity, streptavidin-based purification tools have become widely used for isolating biotinylated compounds from complex mixtures The authors and others routinely use streptavidin-sepharose matrixes to isolate biotinylated polypeptides generated in proximity-dependent biotinylation approaches, such as BioID or APEX. However, the authors noted sporadic, substantial variation in the quality of BioID experiments performed in the same laboratories over time, using seemingly identical protocols. Identifying the source of this problem, here, the authors highlight considerable variability in streptavidin contamination derived from different production lots of streptavidin-sepharose beads from the same manufacturer and demonstrate that high levels of streptavidin peptide contamination can have detrimental effects on BioID data. The authors also describe two simple, rapid approaches to assess the degree of streptavidin “”shedding”” from individual lots of the sepharose matrix before use to avoid the use of lower quality reagent. The experimental part of the paper was very detailed, including the reaction process of 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5Formula: C10H16N2O3S)

5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5) may be used to elute proteins from avidin/streptavidin resins. It has been used for culturing of oligodendrocytes.Formula: C10H16N2O3S And it has been used as a vitamin supplement for the growth of Bacillus species.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

《Clinical risk assessment of biotin interference with a high-sensitivity cardiac troponin T assay》 was published in Clinical Chemistry and Laboratory Medicine in 2020. These research results belong to Mumma, Bryn; Diercks, Deborah; Twerenbold, Raphael; Valcour, Andre; Ziegler, Andre; Schuetzenmeister, Andre; Kasapic, Dusanka; Tran, Nam. Related Products of 58-85-5 The article mentions the following:

Objectives : Biotin >20.0 ng/mL (81.8 nmol/L) can reduce Elecsys Troponin T Gen 5 (TnT Gen 5; Roche Diagnostics) assay recovery, potentially leading to false-neg. results in patients with suspected acute myocardial infarction (AMI). We aimed to determine the prevalence of elevated biotin and AMI misclassification risk from biotin interference with the TnT Gen 5 assay. Methods : Biotin was measured using an Elecsys assay in two cohorts: (i) 797 0-h and 646 3-h samples from 850 US emergency department patients with suspected acute coronary syndrome (ACS); (ii) 2023 random samples from a US laboratory network, in which biotin distributions were extrapolated for higher values using pharmacokinetic modeling. Biotin >20.0 ng/mL (81.8 nmol/L) prevalence and biotin 99th percentile values were calculated AMI misclassification risk due to biotin interference with the TnT Gen 5 assay was modeled using different assay cutoffs and test timepoints. Results : ACS cohort: 1/797 (0.13%) 0-h and 1/646 (0.15%) 3-h samples had biotin >20.0 ng/mL (81.8 nmol/L); 99th percentile biotin was 2.62 ng/mL (10.7 nmol/L; 0-h) and 2.38 ng/mL (9.74 nmol/L; 3-h). Using conservative assumptions, the likelihood of false-neg. AMI prediction due to biotin interference was 0.026% (0-h result; 19 ng/L TnT Gen 5 assay cutoff). US laboratory cohort: 15/2023 (0.74%) samples had biotin >20.0 ng/mL (81.8 nmol/L); 99th percentile biotin was 16.6 ng/mL (68.0 nmol/L). Misclassification risk due to biotin interference (19 ng/L TnT Gen 5 assay cutoff) was 0.025% (0-h), 0.0064% (1-h), 0.00048% (3-h), and <0.00001% (6-h). Conclusions : Biotin interference has minimal impact on the TnT Gen 5 assay's clin. utility, and the likelihood of false-neg. AMI prediction is extremely low. In the experimental materials used by the author, we found 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5Related Products of 58-85-5)

5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5) may be used to elute proteins from avidin/streptavidin resins. It has been used for culturing of oligodendrocytes.Related Products of 58-85-5 And it has been used for blocking endogenous biotin during immunohistology procedures.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The author of 《Molecular Mobility in a Set of Imidazolium-Based Ionic Liquids [bmim]+A- by the NMR-Relaxation Method》 were Bystrov, Sergei S.; Matveev, Vladimir V.; Chernyshev, Yurii S.; Balevicius, Vytautas; Chizhik, Vladimir I.. And the article was published in Journal of Physical Chemistry B in 2019. Application In Synthesis of 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate The author mentioned the following in the article:

The detailed investigation of the local mobility in a set of dried imidazolium-based ionic liquids (1-butyl-3-methylimidazolium) in a wide temperature range and varying anions (BF4-, I-, Cl-, Br-, NO3-, TfO-) is presented. The measurements of temperature dependencies of the spin-lattice relaxation times of 1H and 13C nuclei are motivated by the need to obtain a fundamental characterization of mol. mobility of the substances under study, namely, to estimate the correlation times, τc, for the motion of individual mol. groups. In particular, it follows from obtained results that the mobility of the hydrocarbon “”tail”” is higher (smaller τc) than that of the imidazole ring, and this expected tendency is quantified. The effect of the influence of an anion type on the cation mobility is also analyzed. In the part of experimental materials, we found many familiar compounds, such as 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6Application In Synthesis of 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate)

3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6) is a member of lonic liquids. Actually, lonic liquids as innovative fluids have received wide attention only during the past two decades. The number of SCI papers published on lonic liquids has exponentially increased from a few in 1996 to >5000 in 2016, exceeding the annual growth rates of other popular scientific areas. Application In Synthesis of 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Venable, Jennifer D.; Cai, Hui; Chai, Wenying; Dvorak, Curt A.; Grice, Cheryl A.; Jablonowski, Jill A.; Shah, Chandra R.; Kwok, Annette K.; Ly, Kiev S.; Pio, Barbara; Wei, Jianmei; Desai, Pragnya J.; Jiang, Wen; Nguyen, Steven; Ling, Ping; Wilson, Sandy J.; Dunford, Paul J.; Thurmond, Robin L.; Lovenberg, Timothy W.; Karlsson, Lars; Carruthers, Nicholas I.; Edwards, James P. published their research in Journal of Medicinal Chemistry on December 29 ,2005. The article was titled 《Preparation and Biological Evaluation of Indole, Benzimidazole, and Thienopyrrole Piperazine Carboxamides: Potent Human Histamine H4 Antagonists》.Product Details of 3584-66-5 The article contains the following contents:

Three series of H4 receptor ligands, derived from indoly-2-yl-(4-methyl-piperazin-1-yl)methanones, have been synthesized and their structure-activity relationships evaluated for activity at the H4 receptor in competitive binding and functional assays. In all cases, substitution of small lipophilic groups in the 4 and 5-positions led to increased activity in a [3H]histamine radiolabeled ligand competitive binding assay. In vitro metabolism and initial pharmacokinetic studies were performed on selected compounds leading to the identification of carboxamides I [X = CH, N] as potent H4 antagonists with the potential for further development. In addition, I demonstrated efficacy in in vitro mast cell and eosinophil chemotaxis assays. After reading the article, we found that the author used 5-Chloro-2-(trichloromethyl)-1H-benzo[d]imidazole(cas: 3584-66-5Product Details of 3584-66-5)

5-Chloro-2-(trichloromethyl)-1H-benzo[d]imidazole(cas: 3584-66-5) belongs to imidazoles.Imidazole rings are part of unnatural cyclic peptides and are used as ester isosteres in peptidomimetic studies.
However, the application of imidazoles is not limited to the field of peptides and peptidomimetics. Product Details of 3584-66-5

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

COA of Formula: C10H16N2O3SIn 2019 ,《Artificial Metalloenzymes Based on the Biotin-Streptavidin Technology: Enzymatic Cascades and Directed Evolution》 appeared in Accounts of Chemical Research. The author of the article were Liang, Alexandria Deliz; Serrano-Plana, Joan; Peterson, Ryan L.; Ward, Thomas R.. The article conveys some information:

A review. Artificial metalloenzymes (ArMs) result from anchoring a metal-containing moiety within a macromol. scaffold (protein or oligonucleotide). The resulting hybrid catalyst combines attractive features of both homogeneous catalysts and enzymes. This strategy includes the possibility of optimizing the reaction by both chem. (catalyst design) and genetic means leading to achievement of a novel degree of (enantio)selectivity, broadening of the substrate scope, or increased activity, among others. In the past 20 years, the Ward group has exploited, among others, the biotin-(strept)avidin technol. to localize a catalytic moiety within a well-defined protein environment. Streptavidin has proven versatile for the implementation of ArMs as it offers the following features: (i) it is an extremely robust protein scaffold, amenable to extensive genetic manipulation and mishandling, (ii) it can be expressed in E. coli to very high titers (up to >8 g·L-1 in fed-batch cultures), and (iii) the cavity surrounding the biotinylated cofactor is commensurate with the size of a typical metal-catalyzed transition state. Relying on a chemogenetic optimization strategy, varying the orientation and the nature of the biotinylated cofactor within genetically engineered streptavidin, 12 reactions have been reported by the Ward group thus far. Recent efforts within our group have focused on extending the ArM technol. to create complex systems for integration into biol. cascade reactions and in vivo. With the long-term goal of complementing in vivo natural enzymes with ArMs, we summarize herein three complementary research lines: (i) With the aim of mimicking complex cross-regulation mechanisms prevalent in metabolism, we have engineered enzyme cascades, including cross-regulated reactions, that rely on ArMs. These efforts highlight the remarkable (bio)compatibility and complementarity of ArMs with natural enzymes. (ii) Addnl., multiple-turnover catalysis in the cytoplasm of aerobic organisms was achieved with ArMs that are compatible with a glutathione-rich environment. This feat is demonstrated in HEK-293T cells that are engineered with a gene switch that is upregulated by an ArM equipped with a cell-penetrating module. With this goal in mind, we have identified E. coli’s periplasmic space and surface display to compartmentalize an ArM, while maintaining the critical phenotype-genotype linkage. (iii) Finally, ArMs offer the fascinating prospect of “”endowing organometallic chem. with a genetic memory.””. This strategy offers a straightforward means to optimize by directed evolution the catalytic performance of ArMs. Five reactions have been optimized following these compartmentalization strategies: ruthenium-catalyzed olefin metathesis, ruthenium-catalyzed deallylation, iridium-catalyzed transfer hydrogenation, dirhodium-catalyzed cyclopropanation and carbene insertion in C-H bonds. Importantly, >100 turnovers were achieved with ArMs in E. coli whole cells, highlighting the multiple turnover catalytic nature of these systems. In the part of experimental materials, we found many familiar compounds, such as 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5COA of Formula: C10H16N2O3S)

5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5) may be used to elute proteins from avidin/streptavidin resins. It has been used for culturing of oligodendrocytes.COA of Formula: C10H16N2O3S And it has been used as a vitamin supplement for the growth of Bacillus species.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

《The effect of nanoscale friction of mesoporous carbon supported ionic liquids on the mass transfer of CO2 adsorption》 was published in Physical Chemistry Chemical Physics in 2020. These research results belong to Fan, Pengpeng; Qiu, Xiuhua; Shah, Faiz Ullah; Ji, Qingmin; An, Rong. SDS of cas: 174501-65-6 The article mentions the following:

Supported ionic liquids (ILs) are attractive alternatives for CO2 capture and the thickness of supported IL films plays a critical role in the CO2 mass transfer rate. However, the dependence of CO2 uptake on the IL film thickness differs as the system varies. In this work, at. force microscopy (AFM) is employed to probe the ‘nanofriction coefficient’ to characterize the mobility of ILs at the solid interface, in which, the smaller the nanofriction coefficient, the faster are the ionic mobility and CO2 mass transfer. A monotonic and almost linear relationship for supported IL films is obtained between the resistance of CO2 mass transfer (1/k) and the nanofriction coefficient (μ), avoiding the controversy over the effect of supported IL film thickness on CO2 adsorption. The enhanced mass transfer of CO2 adsorption at IL-solid interfaces is observed at smaller resistance 1/k and friction coefficient μ. The low-friction driven local mobility (diffusion) of ILs at solid interfaces is enhanced, promoting the exchange mixing of the ILs adsorbing CO2 with the ‘blank-clean’ ions of the ILs, and thus accelerating the CO2 mass transfer. The proposed correlation links the nanoscale friction with the mass transfer of CO2 adsorption, providing a fresh view on the design of ultra-low frictional supported ILs for enhanced CO2 capture and separation processes. In the experimental materials used by the author, we found 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6SDS of cas: 174501-65-6)

3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6) is a member of lonic liquids. A multidisciplinary study on lonic liquids is emerging, including chemistry, materials science, chemical engineering, and environmental science. More specifically, some important fundamental viewpoints are now different from the original concepts, as insights into the nature of lonic liquids become deeper. For example, the physicochemical properties of lonic liquids are now recognized as ranging broadly from the oft quoted “nonvolatile, non-flammable, and air and water stable” to those that are distinctly volatile, flammable, and unstable. SDS of cas: 174501-65-6

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

《Update on Biotin Therapy in Dermatology: Time for a Change.》 was published in Journal of drugs in dermatology : JDD in 2020. These research results belong to Lipner, Shari R. Synthetic Route of C10H16N2O3S The article mentions the following:

Biotin (vitamin B7 or H) is found in milk, nuts, egg yolks, cereals, supplements, synthesized by intestinal bacteria, and is required for gluconeogenesis, fatty acid synthesis and amino acid catabolism. The results came from multiple reactions, including the reaction of 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5Synthetic Route of C10H16N2O3S)

5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5) may be used to elute proteins from avidin/streptavidin resins. It has been used for culturing of oligodendrocytes.Synthetic Route of C10H16N2O3S The biotin/avidin or biotin/streptavidin interaction is utilized in many labeling and purification schemes.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem