Category: alcohols-buliding-blocks

Synthetic Route of C8H12Cl2Pt. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about pH-mediated colorimetric and luminescent sensing of aqueous nitrate anions by a platinum(II) luminophore@mesoporous silica composite. Author is Norton, Amie E.; Sharma, Malvika; Cashen, Christina; Dourges, Marie-Anne; Toupance, Thierry; Krause, Jeanette A.; Motkuri, Radha Kishan; Connick, William B.; Chatterjee, Sayandev.

Increased levels of nitrate (NO3-) in the environment can be detrimental to human health. Herein, we report a robust, cost-effective, and scalable, hybrid material-based colorimetric/luminescent sensor technol. for rapid, selective, sensitive, and interference-free in situ NO3- detection. These hybrid materials are based on a square-planar platinum(II) salt [Pt(tpy)Cl]PF6 (tpy = 2,2′;6′,2′′-terpyridine) supported on mesoporous silica. The platinum salt undergoes a vivid change in color and luminescence upon exposure to aqueous NO3- anions at pH ≤ 0 caused by substitution of the PF6- anions by aqueous NO3-. This change in photophysics of the platinum salt is induced by a rearrangement of its crystal lattice that leads to an extended Pt···Pt···Pt interaction, along with a concomitant change in its electronic structure. Furthermore, incorporating the material into mesoporous silica enhances the surface area and increases the detection sensitivity. A NO3- detection limit of 0.05 mM (3.1 ppm) is achieved, which is sufficiently lower than the ambient water quality limit of 0.16 mM (10 ppm) set by the United States Environmental Protection Agency. The colorimetric/luminescence of the hybrid material is highly selective to aqueous NO3- anions in the presence of other interfering anions, suggesting that this material is a promising candidate for the rapid NO3- detection and quantification in practical samples without separation, concentration, or other pretreatment steps.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Dihydropyridines. VII. Reactions of symmetrically alkylated 3,5-dicyanopyridines with sodium borohydride》. Authors are Kuthan, J.; Janeckova, E..The article about the compound:Pyridine-3,5-dicarbonitrilecas:1195-58-0,SMILESS:N#CC1=CC(C#N)=CN=C1).SDS of cas: 1195-58-0. Through the article, more information about this compound (cas:1195-58-0) is conveyed.

cf. ibid. 1495; CA 60, 6817d. NaBH4 reduction of 3,5-dicyanopyridines I-VI gave 3,5-dicyano-1,2- and 1,4-dihydropyridines VII-XVII. I and LiAlH4 gave a mixture of VII and VIII which was separated by chromatography. Two procedures were used in the reduction of I-VI: Method A. EtOH (0.2 ml.) was added to a mixture of 38 mg. NaBH4 and 0.001 mole ground I-VI, and the precipitated product washed with 2.5 ml. cold H2O. Method B. NaBH4 (150 mg.) was added to a mixture of 0.002 mole I-VI and 5 ml. EtOH, the solution diluted with H2O to ∼80 ml. after several hrs., and the precipitated filtered off (starting compound, method, product, % yield, and m.p. given): I, B, VIII, 62, 205-6° (dilute EtOH); I, A, VII, 188-9° (Me2CO-cyclohexane) (VIII was also obtained); II, A, IX, 50, 214-15° (dilute EtOH); III, A, X + XI (92:8), 44, 154-72° (mixture); IV, B, XII, 89, 232-3° (MeOH); V, B, XIV + XV (71:29), 69, 138-69° (mixture); VI, -, XVI + XVII (86:14), 77, 108-22° (mixture). Similar results were obtained by reduction of I-IV with LiAlH4. Oxidation of 1.73 g. 3,5-dicyano-2-methyl-4-ethyl-1,2-dihydropyridine in 70 ml. EtOH with Ag2O from 7 g. AgNO3 gave 91% 3,5-dicyano-2-methyl-4-ethylpyridine (XVIII), m. 68-8.5°, sublimed 55-60°/0.4 mm. Treatment of 1.28 g. XVIII with MeMgI prepared from 750 mg. Mg and 1.9 ml. MeI gave 61% XVII, m. 101-2° (dilute acetone), which was oxidized with MnO2 to VI, m. 70-1°.

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Quality Control of Dichloro(1,5-cyclooctadiene)platinum(II). 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. Compound: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about Encapsulation of FePt and FePt3 alloys inside carbon-foam materials.

We demonstrate an advanced chem. vapor deposition (CVD) approach in which the addition of Pt-containing hydrocarbons to ferrocene allows the nucleation of a novel carbon-foam material completely filled with elemental Fe and Pt crystal-phases. These phases are then found to alloy into tetragonal FePt and cubic FePt3 in specific annealing conditions. A dependence of the FePt nucleation on the Ar/H2 flow rate is reported. In addition, high pressure (5 GPa) experiments are found to favor the formation of a single FePt3 encapsulated phase together with the nucleation of C-O rich carbon layers in the foam surface.

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COA of Formula: C8H12Cl2Pt. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about An Antitumor Bis(N-Heterocyclic Carbene)Platinum(II) Complex That Engages Asparagine Synthetase as an Anticancer Target. Author is Hu, Di; Yang, Chen; Lok, Chun-Nam; Xing, Fangrong; Lee, Pui-Yan; Fung, Yi Man Eva; Jiang, Haibo; Che, Chi-Ming.

New anticancer platinum(II) compounds with distinctive modes of action are appealing alternatives to combat the drug resistance and improve the efficacy of clin. used platinum chemotherapy. Herein, we describe a rare example of an antitumor PtII complex targeting a tumor-associated protein, rather than DNA, under cellular conditions. Complex [(bis-NHC)Pt(bt)]PF6 (1a; Hbt=1-(3-hydroxybenzo[b]thiophen-2-yl)ethanone) overcomes cisplatin resistance in cancer cells and displays significant tumor growth inhibition in mice with higher tolerable doses compared to cisplatin. The cellular Pt species shows little association with DNA, and localizes in the cytoplasm as revealed by nanoscale secondary ion mass spectrometry. An unbiased thermal proteome profiling experiment identified asparagine synthetase (ASNS) as a mol. target of 1a. Accordingly, 1a treatment reduced the cellular asparagine levels and inhibited cancer cell proliferation, which could be reversed by asparagine supplementation. A bis-NHC-ligated Pt species generated from the hydrolysis of 1 a forms adducts with thiols and appears to target an active-site cysteine of ASNS.

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Dichloro(1,5-cyclooctadiene)platinum(II)( cas:12080-32-9 ) is researched.Name: Dichloro(1,5-cyclooctadiene)platinum(II).Fukunaga, Toshiya M.; Sawabe, Chizuru; Matsuno, Taisuke; Takeya, Jun; Okamoto, Toshihiro; Isobe, Hiroyuki published the article 《Manipulations of Chiroptical Properties in Belt-Persistent Cycloarylenes via Desymmetrization with Heteroatom Doping》 about this compound( cas:12080-32-9 ) in Angewandte Chemie, International Edition. Keywords: cycloarylene preparation dipole moment fluorescence UV spectrum CD; chirality; circular dichroism; cylinders; macrocycles; nanotubes. Let’s learn more about this compound (cas:12080-32-9).

A desymmetrization strategy has been devised in the design of mol. cylinders to maximize the dissymmetry factor relevant to circularly polarized light. Although the highest dissymmetry factor of organic mols. was previously achieved with a chiral belt-persistent cycloarylene having magnetic and elec. transition dipole moments in parallel, we noticed that an unbalanced magnitude of two moments was detrimental for higher dissymmetry factors. In this study, a mol. cylinder was desymmetrized by arraying doped and undoped panels via stereoselective cross-coupling macrocyclization. The desymmetrization succeeded in balancing two moments by reducing the elec. transition moment at the global min. but failed to maximize the dissymmetry factor. Structural studies revealed that the dissymmetry factor is sensitive to subtle structural fluctuations, while the rotatory strength is not affected. This study is important for the development of chiroptical materials.

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Category: alcohols-buliding-blocks. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 3-Bromo-4-chloronitrobenzene, is researched, Molecular C6H3BrClNO2, CAS is 16588-26-4, about Ligand-free Suzuki-Miyaura cross-coupling with low Pd content: rapid development by a fluorescence-based high-throughput screening method. Author is Lim, Taeho; Ryoo, Jeong Yup; Jang, Mingyeong; Han, Min Su.

In this study, a highly efficient Suzuki-Miyaura (SM) cross-coupling was developed using metal oxide catalysts: 0.02 mol% Pd, aqueous solvent, no ligand, and room temperature Metal oxides containing low Pd content (ppm scale) were prepared by a simple co-precipitation method and used as a catalyst for the SM reaction. A fluorescence-based high-throughput screening (HTS) method was developed for the rapid evaluation of catalytic activity and reaction conditions. Among the various metal oxides, Pd/Fe2O3 showed the highest activity for the SM reaction. After further optimization by HTS, various biaryl compounds RR1 (R = 2-formylphenyl, 4-fluorophenyl, 2-chloro-5-nitrophenyl, etc.; R1 = Ph, 6-methoxynaphthalen-2-yl, pyren-1-yl, 4-fluoro-2-methylphenyl) were obtained under optimal conditions: Pd/Fe2O3 (0.02 mol% Pd) in aqueous ethanol at mild temperature without any ligands.

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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.Hartman, Tomas; Sturala, Jiri; Cibulka, Radek researched the compound: Pyridine-3,5-dicarbonitrile( cas:1195-58-0 ).Synthetic Route of C7H3N3.They published the article 《Two-Phase Oxidations with Aqueous Hydrogen Peroxide Catalyzed by Amphiphilic Pyridinium and Diazinium Salts》 about this compound( cas:1195-58-0 ) in Advanced Synthesis & Catalysis. Keywords: green chem oxidation amphiphilic pyridinium diazinium salt catalyst; oxidation aqueous hydrogen peroxide amphiphilic pyridinium diazinium salt catalyst. We’ll tell you more about this compound (cas:1195-58-0).

Amphiphilic pyridinium and diazinium salts were shown to be effective catalysts in two-phase (water/chloroform or water/dichloromethane) sulfoxidations and N-oxidations with hydrogen peroxide under mild conditions. This unprecedented oxidation method utilizes covalent bonding of hydrogen peroxide to a simple pyridinium or diazinium nucleus to increase the lipophilicity of the hydroperoxide species and to subsequently activate it for oxidations in a non-polar medium. The catalytic efficiency was found to depend on the type of heteroarenium core and on the lipophilicity of the catalyst. Five series of heteroarenium catalysts were prepared and investigated: 1-Alkyl-3,5-dicyanopyridinium, 1-alkyl-3,5-dinitropyridinium, 1-alkyl-3-cyanopyrazinium, 1-alkyl-4-cyanopyrimidinium and 1-alkyl-4-(trifluoromethyl)pyrimidinium triflates (alkyl=butyl, hexyl, octyl, decyl, dodecyl and hexadecyl). Among them, the 1-octyl-3,5-dinitropyridinium and 1-decyl-4-(trifluoromethyl)pyrimidinium triflates were found to be superior catalysts, showing the best stability and the highest catalytic activity, achieving acceleration by a factor of 350 relative to the non-catalyzed reaction. In contrast to other organocatalytic two-phase oxidations that use hydrogen peroxide, the presented method is characterized by high chemoselectivity and low catalyst loading (5 mol%) and with the reactions being performed under mild conditions, i.e., at 25° using diluted hydrogen peroxide and a non-basic aqueous phase. The catalysts have simple structures and are readily available from com. materials. Practical applications are demonstrated via the oxidation of several types of sulfides and amines.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Nuclear-substituted derivatives of 4,4′-diaminodiphenyl sulfone》. Authors are Berg, S. S..The article about the compound:3-Bromo-4-chloronitrobenzenecas:16588-26-4,SMILESS:BrC1=C(C=CC(=C1)[N+](=O)[O-])Cl).Application of 16588-26-4. Through the article, more information about this compound (cas:16588-26-4) is conveyed.

The therapeutic effect of (4-H3NC6H4)3SO3 prompted the investigation of the halogen derivatives; these were tested orally in vivo against Staphylococcus aureus and Streptococcus pyogenes in mice; a decrease in toxicity in the order Cl < Br < iodine, together with corresponding decrease in activity, was observed 2,4-Br(O2N)C6H3NH2 (18.5 g.), through the diazo reaction, gives 12.5 g. 1-chloro-2-bromo-4-nitrobenzene, b0.1 100°, m. 61°. p-O2NC6H4SH (1.55 g.) and 0.4 g. NaOH in 20 cc. EtOH, added to 1.9 g. 3,4-Cl2C6H3NO2 in 10 cc. EtOH and refluxed 2 h., give 1.3 g. 2-chloro-4,4'-dinitrodiphenyl sulfide (I), yellow, m. 144°; the 2-Br analog, yellow, m. 159°, and the 2-I analog, yellow, m. 168°. 3,4-Cl2C6H3NO2 (15 g.) in 60 cc. EtOH, treated (5 min.) with 10 g. Na2S.9H2O in 40 cc. 25% aqueous EtOH and refluxed 6 h., gives 7.2 g. [2,4-Cl(O2N)C6H3]2S, yellow, m. 163°; the portion (3 g.) insoluble in 95% AcOH is the compound C24H12O5N4Cl4S2, probably RN(→O):NR, where R = 3,4-Cl[2,4-Cl(O2N)C6H3S]C6H3S-, red, m. 195°. 2,2'-Diiodo-4,4'-dinitrodiphenyl sulfide (II), pale red, m. 186°. 2,4-Br(O2N)C6H3OH yields an acetate (III), pale yellow, m. 86°; 13 g. III, 7.8 g. p-O2NC6H4SH, 3 g. K2CO3, and 100 cc. Me2CO, refluxed 2 h., yield 6 g. 4,4'-dinitro-2-acetoxydiphenyl sulfide (IV), yellow, m. 100°. Dropwise addition of 7.5 g. KMnO4 in 50 cc. hot H2O to 10 g. I in 150 cc. boiling AcOH gives 8 g. 2-chloro-4,4'-dinitrodiphenyl sulfone (V), m. 182-3°; 2-Br analog, m. 162°, 2-I analog, pale yellow, m. 165°; the sulfone from II, yellow, m. 260°. IV yields 4,4'-dinitro-2-hydroxydiphenyl disulfone, yellow, m. 216°. Reduced Fe (10 g.), added slowly to 5 g. V in 200 cc. boiling AcOH and the mixture heated 10 min. at 90°, gives 3 g. 2-chloro-4,4'-diaminodiphenyl sulfone, pale yellow, m. 114°; 2-Br analog, yellow, m. 157°; 2-I analog, buff, m. 207°. 2,2'-Dichloro-4,4'-diaminodiphenyl sulfone, orange, m. 263°; 2,2'-di-I analog, m. 280°. 4,4'-Diamino-2-hydroxydiphenyl sulfone, m. 134-5° [sulfate, m. 208° (decomposition)] (cf. Burton and Hoggarth, C.A. 39, 4854.7). Here is just a brief introduction to this compound(16588-26-4)Application of 16588-26-4, more information about the compound(3-Bromo-4-chloronitrobenzene) is in the article, you can click the link below.

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Gulledge, Zachary Z.; Carrick, Jesse D. published an article about the compound: tert-Butyl 5-bromo-1H-indazole-1-carboxylate( cas:651780-02-8,SMILESS:CC(C)(C)OC(=O)N1N=CC2=CC(Br)=CC=C12 ).Name: tert-Butyl 5-bromo-1H-indazole-1-carboxylate. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:651780-02-8) through the article.

Continued pursuit of functionalized soft-N-donor complexant scaffolds with favorable solubility and kinetics profiles applicable for the separation of the trivalent minor actinides from the lanthanides has attracted significant interest over the last three decades. Recent work from this laboratory resulted in the production of various N-Boc protected [1,2,4]triazinyl-pyridin-2-yl indole Lewis basic procomplexants which necessitated the removal of the indole N-Boc protecting group prior to evaluation of complexant efficacy in separations assays. Traditional deprotection strategies involving trifluoroacetic and other protic and Lewis acids proved unsuccessful in removal of the recalcitrant indole-N-Boc protecting group necessitating the development of a new strategy for deprotection of this complexant class. A serendipitous result facilitated utilization of 3-methoxypropylamine as a mild deprotecting agent for various N-Boc protected heteroarenes via a proposed addition-elimination mechanism. Method development, application to various heteroarenes including indoles, 1,2-indazoles, 1,2-pyrazoles, and related derivatives, a ten-fold scale-up reaction, and exptl. evaluation of a preliminary mechanistic hypothesis are reported herein.

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Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Chemical Communications (Cambridge, United Kingdom) called Ruthenium-catalyzed synthesis of N-substituted lactams by acceptorless dehydrogenative coupling of diols with primary amines, Author is Zheng, Yanling; Nie, Xufeng; Long, Yang; Ji, Li; Fu, Haiyan; Zheng, Xueli; Chen, Hua; Li, Ruixiang, which mentions a compound: 7661-33-8, SMILESS is O=C1N(C2=CC=C(Cl)C=C2)CCC1, Molecular C10H10ClNO, HPLC of Formula: 7661-33-8.

The first example of synthesis of N-substituted lactams I (R = Ph, 4-(propan-2-yl)phenyl, 2H-1,3-benzodioxol-5-yl, naphthalen-2-yl, etc.; n = 1,2,3) and N-(p-tolyl)isoindolin-2-one via an acceptorless dehydrogenative coupling of diols HO(CH2)2(CH2)nCH2OH and [2-(hydroxymethyl)phenyl]methanol with primary amines RNH2 in one step, which was enabled by combining Ru3(CO)12 with a hybrid N-heterocyclic carbene-phosphine-phosphine ligand as the catalyst have been reported.

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