Month: December 2022

Fadaei, Fatemeh published the artcileStructural specificity of groove binding mechanism between imidazolium-based ionic liquids and DNA revealed by synchrotron-UV Resonance Raman spectroscopy and molecular dynamics simulations, Related Products of imidazoles-derivatives, the publication is Journal of Molecular Liquids (2022), 118350, database is CAplus.

The predicted capability of Ionic Liquids (ILs) in stabilizing the native structure of nucleic acids is relevant in biotechnol., especially for DNA storage and handling. In the present work, we implement a joint combination of advanced spectroscopic techniques such as synchrotron radiation-UV Resonance Raman spectroscopy (SR-UVRR) and mol. dynamics (MD) simulations for deepening insight into the sequence and structural specificity of the binding interactions between imidazolium-based ILs and both the phosphate groups and nucleobases in the minor and major grooves of double-stranded DNA. A 30-base pair double-stranded DNA structure has been chosen as a model of natural DNA. The exptl. and simulation results give evidence of the predominance of a groove binding mechanism between ILs cations and DNA, with preferential interactions among guanine residues and the shorter alkyl-chain length on imidazolium cations. Raman experiments allowed us to detect both cooperative transition and reversible pre-melting structural transformations that involve specific tracts in the structure of DNA and are turned on at lower temperatures for guanine residues than for adenine ones. The more marked effect on the pre-melting states of adenine operated by the imidazolium-based ILs with chloride as anion suggests a selective strong interaction of this anion with the DNA’s adenine-rich tracts. MD simulation results reveal the influence of ILs on the structural properties of DNA and provide more details about the solvation, interaction, stability and flexibility of DNA in the hydrated ILs. According to MD analyses, simultaneous electrostatic and hydrophobic interactions drive the shorter alkyl-chain length of imidazolium cations to have greater interplays with the DNA major groove.

Journal of Molecular Liquids published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H15ClN2, Related Products of imidazoles-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Jahn, Kasper published the artcileFunctional Patterning of DNA Origami by Parallel Enzymatic Modification, Application of N-(2-(2-(2-(2-Aminoethoxy)ethoxy)ethoxy)ethyl)-5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamide, the publication is Bioconjugate Chemistry (2011), 22(4), 819-823, database is CAplus and MEDLINE.

We demonstrate here a rapid and cost-effective technique for nanoscale patterning of functional mols. on the surface of a DNA origami. The pattern is created enzymically by transferring a functionalized dideoxynucleotide to the 3′-end of an arbitrary selected set of synthetic DNA oligonucleotides positioned approx. 6 nm apart in a 70 × 100 nm² rectangular DNA origami. The modifications, which are performed in a single-tube reaction, provide an origami surface modified with a variety of functional groups including chem. handles, fluorescent dyes, or ligands for subsequent binding of proteins. Efficient labeling and patterning was demonstrated by gel electrophoresis shift assays, reverse-phase HPLC, mass spectrometry, at. force microscopy (AFM) anal., and fluorescence measurements. The results show a very high yield of oligonucleotide labeling and incorporation in the DNA origami. This method expands the toolbox for constructing several different modified DNA origami from the same set of staple strands.

Bioconjugate Chemistry published new progress about 359860-27-8. 359860-27-8 belongs to imidazoles-derivatives, auxiliary class Other Aliphatic Heterocyclic,Chiral,Amine,Amide,Ether,Inhibitor, name is N-(2-(2-(2-(2-Aminoethoxy)ethoxy)ethoxy)ethyl)-5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamide, and the molecular formula is C18H34N4O5S, Application of N-(2-(2-(2-(2-Aminoethoxy)ethoxy)ethoxy)ethyl)-5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamide.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Rzhevskiy, Sergey A. published the artcileNew expanded-ring NHC platinum(0) complexes: Synthesis, structure and highly efficient diboration of terminal alkenes, Safety of 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride, the publication is Journal of Organometallic Chemistry (2020), 121140, database is CAplus.

The synthesis and structural characterization of novel Pt(0) complexes are reported. A number of (NHC)Pt(dvtms) (dvtms = 1,3-divinyl-1,1,3,3-tetramethyldisiloxane) complexes were studied in catalytic addition of B₂Pin₂ to terminal alkenes. The novel expanded ring N-heterocyclic carbene complex (7-Dipp)Pt(dvtms) showed highest performance, turnover numbers up to 3800 were achieved. The scope of the reaction was illustrated by 20 examples with a variety of alkyl, alkoxy, halogen, ester, ketone and acetal substituents.

Journal of Organometallic Chemistry published new progress about 258278-25-0. 258278-25-0 belongs to imidazoles-derivatives, auxiliary class Achiral NHCs Ligands, name is 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride, and the molecular formula is C27H39ClN2, Safety of 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Paisley, Nathan R. published the artcileSynthesis of polymeric organic semiconductors using semifluorinated polymer precursors, COA of Formula: C19H14N2, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2018), 56(19), 2183-2191, database is CAplus.

The transesterification of 1,1,1,3,3,3-hexafluoroisopropyl acrylate (HFIPA) homopolymers and block copolymers with Me acrylate (MA) or Bu acrylate (n-BuA) were investigated for the efficient synthesis of p-type and n-type organic semiconductor acrylates. HFIPA, MA, and n-BuA are readily prepared in a one-pot synthesis by Cu(0) reversible deactivation radical polymerization in high yield with low dispersity to give poly(HFIPA)₁₀₀, PMA₁₀₀-b-poly(HFIPA)_x, and PnBuA₁₀₀-b-poly(HFIPA)_x (x = 100, 50,25). The transesterification of poly(HFIPA)₁₀₀ was also studied using ¹⁹F NMR spectroscopy. Based on this method, a series of eight homopolymers and three copolymers based on semiconductor motifs commonly found in organic light-emitting diodes, organic thin-film transistors, and organic photovoltaics were synthesized with narrow dispersity and conversions up to 99%. These experiments demonstrate that poly(HFIPA) can provide a useful building block in the synthesis of organic electronic materials, providing a simpler route to complex materials which may be challenging to access directly via controlled radical polymerization © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, COA of Formula: C19H14N2.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Nobbs, James D. published the artcileFrom alternating to selective distributions in chromium-catalysed ethylene oligomerisation with asymmetric BIMA ligands, Recommanded Product: 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, the publication is Catalysis Science & Technology (2018), 8(5), 1314-1321, database is CAplus.

The oligomerization of ethylene with Cr-based catalysts containing asym. BIMA (bis(benzimidazole)methylamine) ligands produces linear alpha olefins (LAOs) that follow an alternating distribution. The catalytic activity and the degree of alternation is affected by the different ligands; in particular variations at the backbone of the ligand affect the nature of the distribution. For certain catalysts a deviation from regular alternating behavior is observed, whereby increased amounts of 1-hexene and 1-octene (up to 29 mol%) were obtained compared to the amount expected from the distribution anal. based on C₁₀-C₃₄ LAOs. This behavior towards more selective oligomerization to 1-hexene and 1-octene can be explained by varying probabilities of single and double ethylene insertion. The deviations will depend on the size of the metallacycle and are most pronounced early on during the metallacycle growth.

Catalysis Science & Technology published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C9H9ClN2, Recommanded Product: 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Haque, Aminul Md. published the artcileElectrodialytic Universal Synthesis of Highly Pure and Mixed Ionic Liquids, Related Products of imidazoles-derivatives, the publication is ACS Omega (2022), 7(25), 21925-21931, database is CAplus and MEDLINE.

Ionic liquids (ILs) have attracted significant attention from researchers in various fields as a result of their unique properties. As new and important applications are identified for these materials, there is also a drive to develop methods for accessing a wider range of ILs. However, despite this demand, only a few techniques have so far been reported and, more importantly, general but efficient processes for IL synthesis were lacking. Thus, it would be beneficial to devise a cost-effective, environmentally friendly means of producing a wide variety of pure ILs. The present work demonstrates a general purpose electrodialysis approach to the formation of highly pure ILs, based on the formation of nine different ILs from various combinations of cations and anions. In each case, the IL was obtained with a purity of >99%. This method offers the advantages of avoiding the use of hazardous organic solvents and eliminating tedious and costly purification processes. Unlike conventional methods, this membrane-based technol. also prevents the generation of side products. Mixed ILs have many potential applications, and the present technique readily generates various mixed ILs based on a simple adjustment of the applied current.

ACS Omega published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H15ClN2, Related Products of imidazoles-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Zwaagstra, Marieel E. published the artcileSynthesis and Structure-Activity Relationships of Carboxyflavones as Structurally Rigid CysLT₁ (LTD₄) Receptor Antagonists, Application In Synthesis of 4760-35-4, the publication is Journal of Medicinal Chemistry (1998), 41(9), 1428-1438, database is CAplus and MEDLINE.

The synthesis and CysLT₁ receptor affinities of a new series of highly rigid 3′- and 4′-(2-quinolinylmethoxy)- I [Ar = 2-quinolinyl; R¹ = CO₂H; R² = R³ = H; X = CH₂O; Ar = 2-quinolinyl; R¹ = R³ = H; R² = CO₂H; X = CH₂O; Ar = 2-quinolinyl; R¹ = R² = H; R³ = CO₂H; X = CH₂O] or 3′- and 4′-[2-(2-quinolinyl)ethenyl]-substituted, 6-, 7-, or 8-carboxylated flavones (E)-I [Ar = 2-quinolinyl, R¹ = CO₂H, R² = H, R³ = H, Br, Cl, F, Me, X = CH:CH; Ar = 2-quinolinyl, R¹ = R³ = H, R² = CO₂H, X = CH:CH; Ar = 2-quinolinyl, R¹ = CN, R² = H, R³ = Cl, X = CH:CH; Ar = 2-quinolinyl; R¹ = R² = H; R³ = CO₂H, CN, X = CH:CH] are described. CysLT₁ receptor affinities of the flavones (down to 11 nM) were determined by their ability to displace [³H]LTD₄ from its receptor in guinea pig lung membranes. Structure-affinity relationship studies showed that the relative positions of the carboxylic acid and the quinoline moiety were critical for CysLT₁ affinities. While the carboxyl is optimal in the 8 position but tolerated in the 6 position, only the 6- and not the 8-tetrazole has significant activity. The quinoline moiety may be connected to the flavone skeleton by an ethenyl or a methoxy linker, but the substitution position is important for high affinity, especially in the 6-carboxylated flavones. 4′-Substituted 6-carboxyflavones are essentially inactive, whereas the 3′-substituted analogs have submicromolar CysLT₁ affinity. Replacement of the quinoline by other heteroaromatics generally leads to decreased affinities, with the Ph and naphthyl analogs displaying only little or no affinity, while the 7-chloroquinoline analog is comparable in activity to the quinoline. Flavones having CysLT₁ receptor affinities of 10-30 nM were selected for determination of their inhibitory effects on the LTD₄-induced contraction of guinea pig ileum in vitro. The IC₅₀ values ranged between 15 and 100 nM. 8-Carboxy-6-chloro-3′-(2-quinolinylmethoxy)flavone [VUF 5087; {(E)-I; Ar = 2-quinolinyl, R¹ = CO₂H, R² = H, R³ = Cl, X = 3′-CH:CH}] was selected for further research because of its high potency in the functional assay. This series contains the most rigid CysLT₁ receptor antagonists known to date, and they are useful in the development of a CysLT₁ antagonist model, which is discussed in the companion paper.

Journal of Medicinal Chemistry published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C10H9ClN2O, Application In Synthesis of 4760-35-4.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Zwaagstra, Marieel E. published the artcileSynthesis and Structure-Activity Relationships of Carboxylated Chalcones: A Novel Series of Cys-LT₁ (LTD₄) Receptor Antagonists, HPLC of Formula: 4760-35-4, the publication is Journal of Medicinal Chemistry (1997), 40(7), 1075-1089, database is CAplus and MEDLINE.

The synthesis and Cys-LT₁ antagonistic activities of a new series of 2-, 3-, and 4-(2-quinolinylmethoxy)- and 3- and 4-[2-(2-quinolinyl)ethenyl]-substituted, 2′-, 3′-, 4′-, or 5′-carboxylated chalcones are described. Structure-activity relationship studies indicate a preference for the presence of a neg. charged (acidic) moiety, although in some cases nitrile or ester analogs also exhibit moderate activity. The quinoline moiety may be substituted at either the 3- or the 4-position. Replacement of this heterocycle by other aromatic groups results in compounds with comparable affinities [2-(7-chloroquinoline), 1-(1-methyl-2-benzimidazole), or 1-(2-benzothiazole)] or substantially lower activities [1-(1-ethoxyethyl)-2-benzimidazole, 2-naphthyl, or phenyl]. The quinoline and chalcone moieties may be connected by either an ethenyl or a methoxy spacer. The acidic moiety at the chalcone B ring may be attached to the 2′-, 3′-, 4′-, or 5′-position, for both the 3- and 4-substituted chalcones. There are no general patterns to specify which substitution positions gave the most potent compounds The series contains several potent Cys-LT₁ receptor antagonists, with K_D values approaching the nanomolar range, as measured by the displacement of [³H]LTD₄ from guinea pig lung membranes. Antagonism of LTD₄-induced contraction of guinea pig ileum, the inhibition of antigen-induced contraction of guinea pig trachea in vitro, and the inhibition of LTD₄-induced increase of vascular permeability in vivo are determined for chalcones with high Cys-LT₁ receptor affinities (K_D values below 0.1 μM). 2′-Hydroxy-4-(2-quinolinylmethoxy)-5′-(5-tetrazolyl)chalcone showed good activity in both in vitro and in vivo assays and has been selected for further evaluation.

Journal of Medicinal Chemistry published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C18H34N4O5S, HPLC of Formula: 4760-35-4.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Sharma, Pankaj published the artcileNew (E)-1-alkyl-1H-benzo[d]imidazol-2-yl)methylene)indolin-2-ones: Synthesis, in vitro cytotoxicity evaluation and apoptosis inducing studies, Related Products of imidazoles-derivatives, the publication is European Journal of Medicinal Chemistry (2016), 584-600, database is CAplus and MEDLINE.

A new series of (E)-[(benzo[d]imidazol-2-yl)methylene]indolin-2-one derivatives has been synthesized and evaluated for their in vitro cytotoxic activity against a panel of selected human cancer cell lines of prostate (PC-3 and DU-145) and breast (BT-549, MDA-MB-231, MCF-7, 4T1), non-small lung (A549) and gastric (HGC) cancer cells along with normal breast epithelial cells (MCF10A). Among the tested compounds, 8l (I) showed significant cytotoxic activity against MDA-MB-231 and 4T1 cancer cells with IC₅₀ values of 3.26 ± 0.24 μM and 5.96 ± 0.67 μM resp. The compounds 8f (II), 8i (III), 8l (I) and 8o (IV) were also screened on normal human breast epithelial cells (MCF10A) and found to be safer with lesser cytotoxicity. The treatment of MDA-MB-231 cells with 8l led to inhibition of cell migration ability through disruption of F-actin protein assembly. The flow-cytometry anal. reveals that the cells arrested in G0/G1 phase of the cell cycle. Further, the compound 8l induced apoptosis of MDA-MB-231 cells was characterized by different staining techniques such as Acridine Orange/Ethidium Bromide (AO/EB), DAPI, annexin V-FITC/PI, Rhodamine-123 and MitoSOX red assay. Western blot studies demonstrated that the compound 8l treatment led to activation of caspase-3, increased expression of cleaved PARP, increased expression of pro-apoptotic Bax and decreased expression of anti-apoptotic Bcl-2 in MDA-MB-231 cancer cells.

European Journal of Medicinal Chemistry published new progress about 7467-35-8. 7467-35-8 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Alcohol, name is (1-Methyl-1H-benzo[d]imidazol-2-yl)methanol, and the molecular formula is C16H14O6, Related Products of imidazoles-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Rotjanasuworapong, Kornkanok published the artcileElectromechanical responses of agarose ionogels as highly soft and compliant actuators, Computed Properties of 79917-90-1, the publication is European Polymer Journal (2022), 111059, database is CAplus.

Ionogels have been of interest as an alternative electroactive material for soft actuator applications, as they can maintain the shape and size under ambient conditions. Herein, the phys. cross-linked agarose ionogels were fabricated via a solvent casting method by using 1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) as the ionic liquid The electro-actuation responses were investigated in terms of agarose contents and elec. field strengths. For the electromech. responses, the electrostriction shows two distinct behaviors dependent on agarose contents: at the high agarose content of 12.0%volume/volume, the storage modulus relative response (ΔG’/G’0) was the pos. value of 0.06, known as the pos. electrostriction; at the low agarose contents of 4.0%volume/volume and 8.0%volume/volume, the ΔG’/G’0 were neg. definite at -0.11 and -0.06, resp. These behaviors occurred from the plasticizing [Bmim][Cl] mols. which were able to hinder the agarose intermol. interactions. For the electro-induced bending behaviors, the AG-[Bmim][Cl] Ionogel_4.0%volume/volume revealed the highest deflection distance and dielectrophoresis force (F_d) due to its lower initial rigidity and the polarizations from the [Bmim][Cl], moisture, and agarose structures, resp. Comparing with other bio-polymeric hydrogels and ionogels, the present AG-[Bmim][Cl] Ionogels are shown here to possess relatively low electrostrictive stresses but high dielectrophoresis force d.; both are essential features for utilizing in soft actuator applications.

European Polymer Journal published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H15ClN2, Computed Properties of 79917-90-1.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem