Tag: M.W=300-400

Rousseaux, Sophie; Liegault, Benoit; Fagnou, Keith published the article 《Palladium(0)-catalyzed cyclopropane C-H bond functionalization: synthesis of quinoline and tetrahydroquinoline derivatives》. Keywords: palladium catalyzed cyclopropane ring opening carbon hydrogen bond functionalization; quinoline tetrahydroquinoline derivative palladium catalyzed.They researched the compound: Tricyclohexylphosphonium tetrafluoroborate( cas:58656-04-5 ).Application In Synthesis of Tricyclohexylphosphonium tetrafluoroborate. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:58656-04-5) here.

Quinoline and tetrahydroquinoline derivatives were prepared via a 1-pot protocol involving intramol. Pd(0)-catalyzed cyclopropane sp3 C-H bond functionalization and subsequent oxidation or reduction The reaction conditions demonstrate good tolerance for a wide range of functional groups. Evidence suggests that the reaction proceeds through C-H bond cleavage and C-C bond formation to generate a dihydroquinoline intermediate via in situ cyclopropane ring-opening.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Pentaerythrityltetrabromide(SMILESS: BrCC(CBr)(CBr)CBr,cas:3229-00-3) is researched.Name: 1,4-Dibromobutane. The article 《The effect of the carbon-bromine bond type on the limiting oxygen index. II. Polymethylmethacrylate and polystyrene》 in relation to this compound, is published in Fire and Materials. Let’s take a look at the latest research on this compound (cas:3229-00-3).

The efficiencies of organic Br compounds as flame retardants in poly(Me methacrylate) [9011-14-7] and polystyrene [9003-53-6] are independent of the nature of the C-Br bond. They are entirely dependent on the Br concentration and the nature of the substrate.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

COA of Formula: AuCl4H7O3. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Direct printing of gold nanospheres from colloidal solutions by pyro-electrohydrodynamic jet allows hypersensitive SERS sensing. Author is Pannico, Marianna; Musto, Pellegrino; Rega, Romina; Vespini, Veronica; Grilli, Simonetta; Ferraro, Pietro.

Pyro-electrohydrodynamic jet printing (p-jet) has been used to fabricate a nanostructured plasmonic sensor for SERS spectroscopy. The p-jet approach allowed us to have an assembly of nanoparticles with suitable geometry and size, which resulted in a sensing surface with intense SERS activity and a rather homogeneous response. Raman imaging measurements highlighted strong Enhancement Factors across the sensing area, exceeding those of the pristine colloidal solution by almost two orders of magnitude. The intense plasmonic effect was further demonstrated by the spectroscopic recognition of a metal-catalyzed dimerization process triggered to completeness at the metal surface. The results presented herein demonstrate the usefulness of the proposed SERS sensor for hypersensitive mol. anal.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Formula: AuCl4H7O3. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Doxorubicin-loaded gold nanorods: a multifunctional chemo-photothermal nanoplatform for cancer management. Author is Awan, Uzma Azeem; Raza, Abida; Ali, Shaukat; Saeed, Rida Fatima; Akhtar, Nosheen.

Two of the limitations associated with cancer treatment are the low efficacy and the high dose-related side effects of anticancer drugs. The purpose of the current study was to fabricate biocompatible multifunctional drug-loaded nanoscale moieties for co-therapy (chemo-photothermal therapy) with maximum efficacy and min. side effects. Herein, we report in vitro anticancerous effects of doxorubicin (DOX) loaded on gold nanorods coated with the polyelectrolyte poly(sodium-4-styrenesulfonate) (PSS-GNRs) with and without NIR laser (808 nm, power d. = 1.5 W/cm2 for 2 min) irradiation The drug-loading capacity of PSS-GNRs was about 76% with a drug loading content of 3.2 mg DOX/mL. The cumulative DOX release significantly increased after laser exposure compared to non-irradiated samples (p < 0.05). The zeta potential values of GNRs, PSS-GNRs and DOX-PSS-GNRs were measured as 42 ± 0.1 mV, -40 ± 0.3 mV and 39.3 ± 0.6 mV, resp. PSS-GNRs nanocomplexes were found to be biocompatible and showed higher photothermal stability. The DOX-conjugated nanocomplexes with NIR laser irradiation appear more efficient in cell inhibition (93%) than those without laser exposure (65%) and doxorubicin alone (84%). The IC50 values of PSS-GNRs-DOX and PSS-GNRs-DOX were measured as 7.99 and 3.12μg/mL, resp., with laser irradiation Thus, a combinatorial approach based on chemotherapy and photothermal strategies appears to be a promising platform in cancer management. I hope my short article helps more people learn about this compound(Hydrogen tetrachloroaurate(III) trihydrate)Formula: AuCl4H7O3. Apart from the compound(16961-25-4), you can read my other articles to know other related compounds.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Facet-selective asymmetric functionalization of anisotropic gold nanoprisms for Janus particle synthesis, published in 2020-06-30, which mentions a compound: 16961-25-4, mainly applied to hexadecane thiol mol coating gold nanoprism Janus particle synthesis, Recommanded Product: 16961-25-4.

Abstract: Janus particles, which possess asym. structures and/or multiple surface chemistries, have attracted intense interest due to their capability of multiple distinct interactions with their environment. Most Janus particles synthesis techniques rely on applying coating mols. on isotropic particles. Herein, we demonstrate a method to controllably functionalize both major facets of geometrically anisotropic triangular gold nanoprisms in the size range of 100-200 nm with two distinct mol. coatings (hexadecane thiol or thiolated poly (ethylene) glycol and thiol-modified oligonucleotide), giving rise to the formation of Janus gold nanoprisms. Janus particles orient themselves on the interface of water-chloroform mixture and exhibit variable interaction with both hydrophilic and hydrophobic surfaces due to their amphiphilicity and undergo asym. self-assembly behavior with other nanoparticles.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Marhadour, Sophie; Marchand, Pascal; Pagniez, Fabrice; Bazin, Marc-Antoine; Picot, Carine; Lozach, Olivier; Ruchaud, Sandrine; Antoine, Maud; Meijer, Laurent; Rachidi, Najma; Le Pape, Patrice published the article 《Synthesis and biological evaluation of 2,3-diarylimidazo[1,2-a]pyridines as antileishmanial agents》. Keywords: diarylimidazopyridine preparation antileishmanial; aryl boronic acid Suzuki reaction aryl halide arylation.They researched the compound: Tricyclohexylphosphonium tetrafluoroborate( cas:58656-04-5 ).Recommanded Product: 58656-04-5. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:58656-04-5) here.

A novel series of 2,3-diarylimidazo[1,2-a]pyridines was synthesized and evaluated for their antileishmanial activities. Four derivatives exhibited good activity against the promastigote and intracellular amastigote stages of Leishmania major, coupled with a low cytotoxicity against the HeLa human cell line. The impact of compound lipophilicity on antiparasitic activities was investigated by Log D comparison. Although LmCK1 could be the parasitic target for three compounds I(R = MeO, EtO2C-) and II, the inhibition of another target is under study to explain the antileishmanial effect of the most promising compounds

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Cerra, Sara; Salamone, Tommaso A.; Sciubba, Fabio; Marsotto, Martina; Battocchio, Chiara; Nappini, Silvia; Scaramuzzo, Francesca A.; Li Voti, Roberto; Sibilia, Concita; Matassa, Roberto; Beltran, Ana Maria; Familiari, Giuseppe; Fratoddi, Ilaria researched the compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4 ).COA of Formula: AuCl4H7O3.They published the article 《Study of the interaction mechanism between hydrophilic thiol capped gold nanoparticles and melamine in aqueous medium》 about this compound( cas:16961-25-4 ) in Colloids and Surfaces, B: Biointerfaces. Keywords: hydrophilic thiol gold nanoparticle melamine UV spectroscopy; 3-mercapto-1-propanesulfonate; Aggregation mechanism; Electrostatic interactions; Hydrophilic gold nanoparticles; Melamine. We’ll tell you more about this compound (cas:16961-25-4).

In the last years, intense efforts have been made in order to obtain colloidal-based systems capable of pointing out the presence of melamine in food samples. In this work, we reported about the recognition of melamine in aqueous solution, using gold nanoparticles stabilized with 3-mercapto-1-propanesulfonate (AuNPs-3MPS), with the aim of deepening how the recognition process works. AuNPs were synthesized using a wet chem. reduction method. The synthesized AuNPs-3MPS probe was fully characterized, before and after the recognition process, by both physicochem. (UV-vis, FT-IR, 1H-NMR, DLS and ζ-potential) and morphostructural techniques (AFM, HR-TEM). The chem. and electronic structure was also investigated by SR-XPS. The sensing method is based on the melamine-induced aggregation of AuNPs; the presence of melamine was successfully detected in the range of 2.5-500 ppm. The results achieved also demonstrate that neg. charged AuNPs-3MPS are potentially useful for determining melamine contents in aqueous solution SR-XPS measurements allowed to understand interaction mechanism between the probe and the analyte. The presence of sulfonate groups allows a mutual interaction mediated by electrostatic bonds between nanoparticles surface thiols and pos. charged amino groups of melamine mols.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 58656-04-5, is researched, SMILESS is F[B-](F)(F)F.[PH+](C1CCCCC1)(C2CCCCC2)C3CCCCC3, Molecular C18H34BF4PJournal, Article, Research Support, Non-U.S. Gov’t, Chemistry – A European Journal called Discovery of a Full-Color-Tunable Fluorescent Core Framework through Direct C-H (Hetero)arylation of N-Heterocycles, Author is Liu, Bo; Wang, Zhi; Wu, Ningjie; Li, Mingliang; You, Jingsong; Lan, Jingbo, the main research direction is full color tunable fluorescent core framework manufacturing.Formula: C18H34BF4P.

Metal-catalytic direct C-H arylation of N-heterocycles can serve as a highly efficient and easily tunable synthetic tool for the discovery of a structurally diverse of organic fluorescent substances, especially indolizines. The prepared fluorophores have successfully marked A375 cells, exhibiting their future potential as useful bioimaging fluorescence probes.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 16961-25-4, is researched, SMILESS is Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+], Molecular AuCl4H7O3Journal, Article, Research Support, Non-U.S. Gov’t, Scientific Reports called Antimicrobial activities of green synthesized gums-stabilized nanoparticles loaded with flavonoids, Author is Anwar, Ayaz; Masri, Abdulkader; Rao, Komal; Rajendran, Kavitha; Khan, Naveed Ahmed; Shah, Muhammad Raza; Siddiqui, Ruqaiyyah, the main research direction is gum stabilized nanoparticle flavonoid green synthesis antimicrobial activity.HPLC of Formula: 16961-25-4.

Herein, we report green synthesized nanoparticles based on stabilization by plant gums, loaded with citrus fruits flavonoids Hesperidin (HDN) and Naringin (NRG) as novel antimicrobial agents against brain-eating amoebae and multi-drug resistant bacteria. Nanoparticles were thoroughly characterized by using zetasizer, zeta potential, at. force microscopy, ultravoilet-visible and Fourier transform-IR spectroscopic techniques. The size of these spherical nanoparticles was found to be in the range of 100-225 nm. The antiamoebic effects of these green synthesized Silver and Gold nanoparticles loaded with HDN and NRG were tested against Acanthamoeba castellanii and Naegleria fowleri, while antibacterial effects were evaluated against methicillin-resistant Staphylococcus aureus (MRSA) and neuropathogenic Escherichia coli K1. Amoebicidal assays revealed that HDN loaded Silver nanoparticles stabilized by gum acacia (GA-AgNPs-HDN) quant. abolished amoeba viability by 100%, while NRG loaded Gold nanoparticles stabilized by gum tragacanth (GT-AuNPs-NRG) significantly reduced the viability of A. castellanii and N. fowleri at 50μg per mL. Furthermore, these nanoparticles inhibited the encystation and excystation by more than 85%, as well as GA-AgNPs-HDN only completely obliterated amoeba-mediated host cells cytopathogenicity. Whereas, GA-AgNPs-HDN exhibited significant bactericidal effects against MRSA and E. coli K1 and reduced bacterial-mediated host cells cytotoxicity. Notably, when tested against human cells, these nanoparticles showed minimal (23%) cytotoxicity at even higher concentration of 100μg per mL as compared to 50μg per mL used for antimicrobial assays. Hence, these novel nanoparticles formulations hold potential as therapeutic agents against infections caused by brain-eating amoebae, as well as multi-drug resistant bacteria, and recommend a step forward in drug development.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Improvement of the carbon monoxide gas sensing properties of polyaniline in the presence of gold nanoparticles at room temperature, the main research direction is carbon monoxide gas sensor polyaniline gold nanocomposite.Reference of Hydrogen tetrachloroaurate(III) trihydrate.

In the present work, the influence of gold (Au) nanoparticles on carbon monoxide gas sensing performance of polyaniline (PAni) at room temperature was comprehensively studied. The Au/PAni nanocomposites were synthesized by the ultrasound mixing of emeraldine salt polyaniline and different amounts of Au nanoparticles colloidal solution The analyses of field emission scanning electron microscope in conjunction with energy-dispersive X-ray spectroscopy indicated that the surface of PAni fibers was well decorated with Au nanoparticles due to the electrostatic interaction and hydrogen bonding. Then, the gas sensing performance of all sensors was investigated toward various concentrations of carbon monoxide gas ranging from 200 to 6000 ppm at room temperature The results indicated that the 2.5%Au/PAni sensor possesses high response(14%-1000 ppm), low detection limit(33 ppm), the acceptable response time(180 s), wide dynamic range(200-6000 ppm) and good selectivity owing to catalytic properties of Au nanoparticles. Thus, the one-dimensional nanostructure might give a promise for high-performance sensing applications.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem