Tag: M.W:200-300

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Light- and Thermal-Induced Spin Crossover in {Fe(abpt)2[N(CN)2]2}. Synthesis, Structure, Magnetic Properties, and High-Spin Low-Spin Relaxation Studies, published in 2001-07-30, which mentions a compound: 1671-88-1, Name is 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine, Molecular C12H10N6, Computed Properties of C12H10N6.

{Fe(abpt)2[N(CN)2]2} (abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) represents the 1st example of an Fe(II) spin-crossover compound containing dicyanamide ligand, [N(CN)2]-, as a counterion. It shows an incomplete two-step spin transition with around 37% of HS mols. trapped in the low-temperature region when standard cooling or warming modes, i.e., 1-2 K min-1, were used. The temperature, T1/2 ≈ 86 K, at which 50% of the conversion takes place, is one of the lowest temperatures observed for an Fe(II) spin-crossover compound Quenching experiments at low temperatures showed that the incomplete character of the conversion is a consequence of slow kinetics. The quenched HS state relaxes back to the LS state displaying noticeable deviation from a single-exponential law. The rate of relaxation was evaluated in the range of temperatures 10-60 K. In the upper limit of temperatures, where thermal activation predominates, the activation energy and the pre-exponential parameter were estimated as Ea ≈ 280 cm-1 and AHL ≈ 10 s-1, resp. The lowest value of kHL around 1.2 × 10-4 s-1 (T = 10 K) was obtained in the region of temperatures where tunneling predominates. A quant. light induced excited spin state trapping (LIESST) effect was observed, and the HS → LS relaxation in the range of temperatures 5-52.5 K was studied. From the Arrhenius plot the two above-mentioned characteristic regimes, thermal-activated (Ea ≈ 431 cm-1 and AHL ≈ 144 s-1) and tunneling (kHL ≈ 1.7 × 10-6 s-1 at 5 K), were characterized. The crystal structure was solved at room temperature It crystallizes in the triclinic P1̅ space group, and the unit cell contains a centrosym. mononuclear unit. Each Fe atom is in a distorted octahedral environment with bond distances Fe-N(1) = 2.216(2) Å, Fe-N(2) = 2.121(2) Å, and Fe-N(3) = 2.160(2) Å for the pyridine, triazole, and dicyanamide ligands, resp.

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Zhou, Yang; Liu, Changchun; Shen, Zhihao; Dai, Bencai; Chen, Jin published the article 《Efficient potassium hydroxide promoted P-arylation of aryl halides with diphenylphosphine》. Keywords: triaryl phosphine oxide preparation; potassium hydroxide catalyst arylation aryl halide diphenylphosphine.They researched the compound: Diphenyl-2-pyridylphosphine( cas:37943-90-1 ).Reference of Diphenyl-2-pyridylphosphine. 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:37943-90-1) here.

A simple synthetic method of triarylphosphine compounds by KOH-promoted P-Arylation reaction of aryl halides with diphenylphosphine is presented. Notably, this transformation could smoothly proceed with high yields under transition-metal-free and mild reaction conditions. In addition, this protocol is valuable for industrial application due to the convenient operation and readily accessible aromatic halides. A possible explanation of the reaction mechanism was proposed based on the exptl. data.

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Related Products of 67929-86-6. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Methyl 5-methoxyindole-2-carboxylate, is researched, Molecular C11H11NO3, CAS is 67929-86-6, about Synthesis of Allenamides and Structurally Related Compounds by a Gold-Catalyzed Hydride Shift Process. Author is Zhao, Qing; Gagosz, Fabien.

N-Alkynyl phthalimides, sulfonamides, ureas, and phosphonamides such as PhthNCCCMe2OCH2Ph (PhthN = 1,3-dioxo-2-isoindolyl) and N-alkynyl indoles and pyrroles such as I with propargylic benzyl ethers underwent chemoselective hydride shifts and fragmentation reactions in the presence of a X-Phos gold complex in either CHCl3 or ClCH2CH2Cl to yield γ-monosubstituted or γ,γ-disubstituted allenyl phthalimides, sulfonamides, ureas, phosphinamides, indoles, and pyrroles such as PhthNCH:C:CMe2 and II in 35-98% yields. I were prepared from terminal alkynes or bromoalkynes and phthalimide, sulfonamides, a benzimidazolone, a phosphinamide, pyrroles, and indoles. N-alkynyl pyrroles and indoles underwent tandem hydride shift, fragmentation, and cyclization reactions in three cases to yield indolizines and benzindolizines such as III in 88-97% yields; reaction of three N-alkynylsulfonamides followed by treatment with alumina yielded dienylsulfonamides in 83-88% yields.

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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: 67929-86-6, is researched, SMILESS is O=C(C(N1)=CC2=C1C=CC(OC)=C2)OC, Molecular C11H11NO3Journal, Chemistry Letters called Design and synthesis of two cytotoxic analogs of the novel pyrrolo[1′,2′:1,2][1,4]diazepin[7,6-b]indol-5(6H)-one nucleus, Author is Tsotinis, Andrew; Vlachou, Margarita; Kiakos, Konstantinos; Hartley, John A.; Thurston, David E., the main research direction is pyrrolodiazepinindolone preparation cytotoxicity leukemia antitumor agent; diazepinindolone pyrrolo preparation cytotoxicity leukemia antitumor agent; indolone pyrrolodiazepin preparation cytotoxicity leukemia antitumor agent.Category: isoquinoline.

The design and synthesis of the two cytotoxic derivatives I (R = H or MeO) of the novel pyrrolo[1′,2′:1,2][1,4]diazepin[7,6-b]indol-5(6H)-one nucleus is described. Readily available Me 2-indolecarboxylates underwent sequential nitrosation with NaNO2 in AcOH, oxidation with KMnO4 in aqueous NaOH, amidation with (2S)-pyrrolidine-2-carboxaldehyde di-Et thioacetal in the presence of EDCI and HOBt, nitro group reduction, and 7-exo-trig cyclization reaction to give the target mols. The new analogs were evaluated in the human leukemic K562 cell line and were shown to have micromolar potency.

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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.Yang, Yuting; Yang, Yan; Wang, Tienan; Tian, Yuyang; Jing, Xiaofei; Zhu, Guangshan researched the compound: Diphenyl-2-pyridylphosphine( cas:37943-90-1 ).Product Details of 37943-90-1.They published the article 《Highly selective reduction of nitroarenes with gold nano-catalysts immobilized in porous aromatic frameworks》 about this compound( cas:37943-90-1 ) in Microporous and Mesoporous Materials. Keywords: aniline preparation; nitroarene reduction gold nanocatalyst. We’ll tell you more about this compound (cas:37943-90-1).

Gold nanoparticles (AuNPs) are highly activated nano-catalysts because of their significantly high surface-to-volume ratio. However, the agglomerative trend of NPs in the solutions causes reduced catalytic activity and inhibits their practical applications. Porous aromatic frameworks (PAFs) with high surface area and enduring stability are ideal support materials for AuNPs immobilization, and their diverse functionalized frameworks would greatly facilitate AuNPs incorporation, thus can be applied as excellent heterogeneous catalysts. By selecting triphenylphosphine and diphenyl-2-pyridylphosphine as monomers, which are the most preferential species to prepare ligand-protected AuNPs, PAF-95 and PAF-96 with high surface areas as well as uniform micropores were successfully synthesized with anhydrous FeCl3 catalysts. With the potential coordination sites of phosphine unit and pyridyl group in PAFs’ skeletons, NPs aggregation was suppressed and AuNPs were evenly dispersed in the resultant Au-PAFs. Benefiting from the high surface area of PAFs and uniform AuNPs incorporation, Au-PAFs nano-catalysts exhibited highly efficient and selective catalytic performance for the reduction of nitroarenes 2-R1-3-R2-4-R3C6H2NO2 (R1 = H, Cl; R2 = H, Cl; R3 = H, Cl, OMe). Meanwhile, their valuable stability enabled good recyclability: retaining high catalytic activities after five cycles.

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Dupouy, Gaelle; Marchivie, Mathieu; Triki, Smail; Sala-Pala, Jean; Gomez-Garcia, Carlos J.; Pillet, Sebastien; Lecomte, Claude; Letard, Jean-Francois published an article about the compound: 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine( cas:1671-88-1,SMILESS:NN1C(C2=NC=CC=C2)=NN=C1C3=NC=CC=C3 ).Computed Properties of C12H10N6. 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:1671-88-1) through the article.

A new polymeric approach, based on cyanocarbanion ligands, for the design of spin crossover (SCO) compounds led the authors to [Fe(abpt)2(tcpd)] (1) (tcpd2- = (C[C(CN)2]3)2-, abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) which was characterized by crystal structure as the 1st SCO mol. chain involving a cyanocarbanion as bridging ligand.

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SDS of cas: 67929-86-6. 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: Methyl 5-methoxyindole-2-carboxylate, is researched, Molecular C11H11NO3, CAS is 67929-86-6, about Synthesis and Biological Evaluation of Indolyl-Pyridinyl-Propenones Having Either Methuosis or Microtubule Disruption Activity. Author is Trabbic, Christopher J.; Overmeyer, Jean H.; Alexander, Evan M.; Crissman, Emily J.; Kvale, Heather M.; Smith, Marcie A.; Erhardt, Paul W.; Maltese, William A..

Methuosis is a form of nonapoptotic cell death characterized by an accumulation of macropinosome-derived vacuoles with eventual loss of membrane integrity. Small mols. inducing methuosis could offer significant advantages compared to more traditional anticancer drug therapies that typically rely on apoptosis. Herein we further define the effects of chem. substitutions at the 2- and 5-indolyl positions on our lead compound I. We have identified a number of compounds that induce methuosis at similar potencies, including an interesting analog having a hydroxypropyl substituent at the 2-position. In addition, we have discovered that certain substitutions on the 2-indolyl position redirect the mode of cytotoxicity from methuosis to microtubule disruption. This switch in activity is associated with an increase in potency as large as 2 orders of magnitude. These compounds appear to represent a new class of potent microtubule-active anticancer agents.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Methyl 5-methoxyindole-2-carboxylate(SMILESS: O=C(C(N1)=CC2=C1C=CC(OC)=C2)OC,cas:67929-86-6) is researched.SDS of cas: 67929-86-6. The article 《Synthesis and pharmacological evaluation of 6a,7-dihydro-6H,13H-pyrazino[1,2-a;4,5-a’]diindole analogs as melatonin receptor ligands》 in relation to this compound, is published in Tetrahedron. Let’s take a look at the latest research on this compound (cas:67929-86-6).

The synthesis of two melatonin-derived analogs of the novel 6a,7-dihydro-6H,13H-pyrazino[1,2-a;4,5-a’]diindole ring system was described. The non-methoxy and methoxy analogs, I (R = H or MeO) were prepared in seven steps starting from indoline-2-carboxylic acid and 5-methoxyindoline-2-carboxylic acid, resp. While I (R = H) exhibited micromolar affinities for both melatonin receptors, the methoxy analog I (R = MeO) displayed moderate affinity for MT2 receptors (K i=0.41 μM) being 4.4-fold higher than for the MT1 subtype.

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Safety of 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine, is researched, Molecular C12H10N6, CAS is 1671-88-1, about A simple one-step synthesis of new 3,5-disubstituted 4-amino-1,2,4-triazoles. Author is Bentiss, Fouad; Lagrenee, Michel; Traisnel, Michel; Mernari, Bouchaib; Elattari, Hassan.

Sym. 3,5-disubstituted 4-amino-1,2,4-triazoles have been prepared by reaction of aromatic nitriles with hydrazine dihydrochloride or sulfate with an excess of hydrazine hydrate in ethylene or diethylene glycol under a nitrogen atm. The structures of the new triazoles were confirmed by anal. and spectral data.

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Electric Literature of C12H10N6. 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: 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine, is researched, Molecular C12H10N6, CAS is 1671-88-1, about Fluorescence modulation via photoinduced spin crossover switched energy transfer from fluorophores to FeII ions. Author is Wang, Jun-Li; Liu, Qiang; Meng, Yin-Shan; Liu, Xin; Zheng, Hui; Shi, Quan; Duan, Chun-Ying; Liu, Tao.

Mol. materials possessing phototunable fluorescence properties have attracted great interest owing to their potential applications in optical switches and storage. However, most fluorescence modulation is realized through light-responsive structural isomerization in solution It is a formidable challenge to achieve phototunable fluorescence emission with high fatigue resistance and a fast response rate in the solid state for the development of devices. Here, a mononuclear compound was constructed via the coordination of fluorophores with FeII ions, whose electronic configuration changed from low spin to high spin upon light irradiation The photoinduced spin crossover of FeII ions was accompanied by a 20% increase in the fluorescence emission intensity. A temperature-dependent spectroscopic study together with time-dependent d. functional theory calculations revealed that the effective spectral overlap between the emission of the fluorophores and the absorption band of the FeII ions differed between the low spin and high spin states. The photoinduced spin crossover switched the energy transfer from the fluorophore to the FeII ion, resulting in fluorescence modulation. The presented results provide a novel approach for developing optical memory and sensors via electron rearrangement of photoinduced spin crossover.

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