Category: imidazoles-derivatives

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about Palladium(0)-Catalyzed Alkynylation of C(sp3)-H Bonds, the main research direction is alkynylation aliphatic amide alkynyl bromide palladium catalyst.HPLC of Formula: 58656-04-5.

The alkynylation of β-C(sp3)-H bonds in aliphatic amides with alkynyl halides has been enabled using Pd(0)/N-heterocyclic carbene (NHC) and Pd(0)/phosphine (PR3) catalysts. E.g., in presence of [Pd(allyl)Cl]2, bis(adamantyl)imidazolium tetrafluoroborate, and Cs2CO3, alkynylation of amide I with TIPSCCBr gave 81% II. This is the first example of utilizing [AlkynylPd(II)Ln] complexes to activate C(sp3)-H bonds.

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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 Development of genistein-loaded gold nanoparticles and their antitumor potential against prostate cancer cell lines, published in 2021-05-31, which mentions a compound: 16961-25-4, mainly applied to prostate cancer cell line genistein loaded gold nanoparticle antitumor; Flow cytometry; Genistein; Gold nanoparticles; Green nanotechnology; Prostate carcinoma cells; Viability assay, Related Products of 16961-25-4.

Soy isoflavone genistein (Gen) exerts beneficial effects against prostate cancer cells in vitro and in vivo. However, its use as a chemoprevention/therapeutic agent is largely limited due to its low bioavailability. In this study we synthesized two variants of a new delivery system, genistein-gold nanoparticles conjugates Gen@AuNPs1 and Gen@AuNPs2, by an environmentally friendly method, using a dual role of Gen to reduce Au3+ and stabilize the formed AuNPs, with no addnl. component. The formation of Gen@AuNPs was confirmed via UV-Vis spectroscopy, FTIR, and Raman spectra measurements. The spherical shape and uniform size of Gen@AuNPs1 and Gen@AuNPs2 (10 ± 2 and 23 ± 3 nm, resp.), were determined by transmission electron microscopy. The nano-conjugates also varied in hydrodynamic diameter (65.0 ± 1.7 and 153.0 ± 2.2 nm) but had similar neg. zeta potential (-35.0 ± 2.5 and -37.0 ± 1.6 mV), as measured by dynamic light scattering. The Gen loading was estimated to be 46 and 48%, for Gen@AuNPs1 and Gen@AuNPs2, resp. The antiproliferative activities of GenAuNPs were confirmed by MTT test in vitro on three malignant prostate carcinoma cell lines (PC3, DU 145, and LNCaP), while selectivity toward malignant phenotype was confirmed using non-cancerous MRC-5 cells. Flow cytometric anal. showed that the inhibition on cell proliferation of more potent Gen@AuNPs1 nano-conjugate is comparable with the effects of free Gen. In conclusion, the obtained results, including physicochem. characterization of newly synthesized AuNPs loaded with Gen, cytotoxicity, and IC50 assessments, indicate their stability and bioactivity as an antioxidant and anti-prostate cancer agent, with low toxicity against human primary cells.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Formula: C7H11NO2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: tert-Butyl 2-cyanoacetate, is researched, Molecular C7H11NO2, CAS is 1116-98-9, about An Air- and Water-Stable Hydrogen-Bond-Donor Catalyst for the Enantioselective Generation of Quaternary Carbon Stereocenters by Additions of Substituted Cyanoacetate Esters to Acetylenic Esters. Author is Luu, Quang H.; Gladysz, John A..

The chiral enantiopure cobalt(III) complex Δ-[Co((S,S)-dpen)3]3+ 2Cl- B(C6F5)4- (dpen = 1,2-diphenylethylenediamine) was found to be an effective catalyst, together with pyridine (10 mol% each), for enantioselective additions of substituted cyanoacetate esters R1CH(CN)CO2R2 (R1 = H2C:CHCH2, Ph, PhCH2, 1-naphthylmethyl, 3-furylmethyl, etc.; R2 = Et, t-Bu) to acetylenic esters R3CCCO2R4 (R3 = H, MeO2C, EtO2C; R4 = Me, Et, t-Bu). The resulting adducts I were formed predominantly with the CO2R4 moiety trans to new carbon-carbon bond (avg. ratio 98:2) and with 70-98% ee (avg. 86%). NMR experiments showed that cyanoacetate and acetylenic esters and pyridine can hydrogen bond to certain NH groups of the catalyst. The reaction rates are zero order in cyanoacetate and acetylenic esters as well as catalyst.

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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 Pentanidium-catalyzed direct assembly of vicinal all-carbon quaternary stereocenters through C(sp3)-C(sp3) bond formation, published in 2021, which mentions a compound: 1116-98-9, mainly applied to vicinal all carbon quaternary stereocenter compound preparation enantioselective diastereoselective; racemic tertiary bromide secondary carbanion substitution reaction pentanidium catalyst, SDS of cas: 1116-98-9.

The stereoselective construction of vicinal all-carbon quaternary stereocenters has long been a formidable synthetic challenge. Direct asym. coupling of a tertiary carbon nucleophile with a tertiary carbon electrophile is the most straightforward approach, but it is sterically and energetically disfavored. Herein, a catalytic asym. substitution, where racemic tertiary bromides coupled directly with racemic secondary or tertiary carbanion, creating a series of congested C(sp3)-C(sp3) bonds, including isolated all-carbon quaternary stereocenters, vicinal tertiary/all-carbon quaternary stereocenters and vicinal all-carbon quaternary stereocenters was described. Using pentanidium as a catalyst, this double stereoconvergent process afforded substituted products in good enantioselectivities and diastereoselectivities.

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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 Synthesis of Poly(4,4-dialkyl-cyclopenta[2,1-b:3,4-b’]dithiophene-alt-2,1,3-benzothiadiazole) (PCPDTBT) in a Direct Arylation Scheme, published in 2012-04-17, which mentions a compound: 58656-04-5, mainly applied to arylation polydialkyl cyclopentadithiophene benzothiadiazole, Application of 58656-04-5.

Poly(4,4-dialkyl-cyclopenta[2,1-b:3,4-b’]dithiophene-alt-2,1,3-benzothiadiazole) (PCPDTBT), a potentially interesting low bandgap donor copolymer for bulk heterojunction-type organic solar cells with a power conversion efficiency >5.5%, can be now synthesized in a direct arylation scheme starting from 4,4-dialkyl-cyclopenta[2,1-b:3,4-b’]dithiophene (CPDT) and 4,7-dibromo-2,1,3-benzothiadiazole (4,7-dibromo-BT) as monomers. The direct arylation procedure leads to PCPDTBT with an Mn of up to 40,000 and circumvents the use of costly diboronic acid/ester or distannyl monomers.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

COA of Formula: C18H34BF4P. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about Synthesis and characterization of a iodine-125-labeled pyrrolo[1,2-a]thieno[3,2-e]pyrazine and evaluation as a potential 5-HT4R SPECT tracer. Author is Cailly, Thomas; Dumas, Noe; Millet, Philippe; Lemaitre, Stephane; Fabis, Frederic; Charnay, Yves; Rault, Sylvain.

In the aim to find new radiotracers for the in vivo imaging of 5-HT4 receptors by ultra-high resolution quant. SPECT, we have developed the synthesis of a radioiodinated 5-HT4 ligand, I, using an iododestannylation procedure. The [125I]-ligand was obtained in a high radiochem. yield. Preliminary autoradiog. and ex vivo studies failed to show a specific labeling of 5-HT4 receptors.

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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 Cu-Catalyzed Couplings of Heteroaryl Primary Amines and (Hetero)aryl Bromides with 6-Hydroxypicolinamide Ligands, published in 2019-08-16, which mentions a compound: 87488-84-4, mainly applied to copper hydroxypicolinamide catalyst coupling heteroaryl primary amine aryl bromide, Recommanded Product: 1-(2-Bromophenyl)-1H-pyrazole.

A family of 6-hydroxypicolinamide ligands have been identified as effective supporting ligands for Cu-catalyzed couplings of heteroaryl bromides and chlorides with heteroaryl primary amines. The C-N couplings are carried out at 80-120° in DMSO or sulfolane using K2CO3 or K3PO4 as the base with 2-10 mol% CuI and supporting ligand. The strength of the base was found to have an impact on the chemoselectivity and rate. The use of K2CO3 as the base enabled selective C-N coupling of aryl bromides over aryl chlorides with 2-5 mol% Cu at 80-120°. With K3PO4 as the base, aryl chlorides are capable of undergoing C-N coupling, though 5-10 mol% Cu is required at 120-130°. Members of the ligand family are straightforward to prepare in one step from 6-hydroxypicolinic acid and the corresponding anilines.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application In Synthesis of 3-Pyridinepropionic acid. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 3-Pyridinepropionic acid, is researched, Molecular C8H9NO2, CAS is 3724-19-4, about Photoinduced decarboxylative borylation of carboxylic acids. Author is Fawcett, Alexander; Pradeilles, Johan; Wang, Yahui; Mutsuga, Tatsuya; Myers, Eddie L.; Aggarwal, Varinder K..

The conversion of widely available carboxylic acids into versatile boronic esters would be highly enabling for synthesis. Authors found that this transformation can be effected by illuminating the N-hydroxyphthalimide ester derivative of the carboxylic acid under visible light at room temperature in the presence of the diboron reagent bis(catecholato)diboron. A simple workup allows isolation of the pinacol boronic ester. Exptl. evidence suggests that boryl radical intermediates are involved in the process. The methodol. is illustrated by the transformation of primary, secondary, and tertiary alkyl carboxylic acids as well as a diverse range of natural-product carboxylic acids, thereby demonstrating its broad utility and functional group tolerance.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Computed Properties of AuCl4H7O3. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Rapid identification of triptolide in Tripterygium wilfordii products by gold immunochromatographic assay. Author is Duan, Yaping; Luo, Jiaoyang; Liu, Congmin; Shan, Linan; Dou, Xiaowen; Yang, Shihai; Yang, Meihua.

Triptolide colloidal gold immunoassay strip was prepared by using colloidal gold labeled monoclonal antibody purified with saturated ammonium sulfate, triptolide succinate-bovine serum albumin and sheep anti-mouse IgG for the first time in our laboratory Under optimized conditions, the detection limit of TP strip prepared in this study were determined to be 1μg/mL and the total anal. time (including sample preparation) was less than 50 min. Sixty-six batches of Tripterygium wilfordii (T. wilfordii) and its adulterations were analyzed. It was found that 28 batches of T. wilfordii were pos. as detected by the strips and 38 batches were neg. The result of test strip detection was in consistent with that from the UFLC-ESI-MS/MS method. Gold immunochromatog. assay was demonstrated as a rapid, cost-effective, reliable technique for on-site screening of T. wilfordii and its preparations The prepared colloidal gold immunoassay strip can be conveniently used for rapid identification of triptolide containing products.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Quality Control of 3-Pyridinepropionic acid. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 3-Pyridinepropionic acid, is researched, Molecular C8H9NO2, CAS is 3724-19-4, about Thermoresponsive organometallic arene ruthenium complexes for tumour targeting. Author is Clavel, Catherine M.; Paunescu, Emilia; Nowak-Sliwinska, Patrycja; Dyson, Paul J..

Application of mild hyperthermia can increase the cytotoxicity of anticancer drugs in tumor cells. In this report, we describe low mol. weight thermoactive ruthenium-based drugs with fluorous chains that are selectively triggered by mild hyperthermia. The organometallic complexes were prepared, characterized, and evaluated for their in vitro cytotoxicity against a panel of human cancer cell lines and non-cancerous immortalized cells. The compounds show considerable chemo-thermal selectivity towards cancer cells (ca. 5 μM vs. >500 μM for healthy cells) for the compound with the longest fluorous chain.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem