Tag: M.W:200-300

Wippich, Julian; Truchan, Nadina; Bach, Thorsten published the article 《Rhodium-Catalyzed N-tert-Butoxycarbonyl (Boc) Amination by Directed C-H Bond Activation》. Keywords: butoxycarbonyl amination carbon hydrogen bond rhodium catalyst.They researched the compound: 2-(5-Bromothiophen-2-yl)pyridine( cas:123784-07-6 ).Related Products of 123784-07-6. 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:123784-07-6) here.

N-tert-Butoxycarbonyl azide (BocN3) is an efficient and economic source for the directed introduction of N-Boc protected amino groups into the thiophene and benzene nucleus. Yields for the amination of 2-pyridin-2-ylthiophenes (10 examples) were 52-88%. For the amination of the resp. benzenes (10 examples) yields between 54% and 99% were recorded with an improved reactivity observed for substrates that bear an electron-withdrawing group. The reaction was applied to short total syntheses of the indoloquinoline alkaloids quindoline and cryptolepine. The facile removal of the Boc protecting group was the key to the success of the syntheses. The scope of the reaction was extended to a C(sp3)-H bond amination and to the amination of 2-phenyloxazoline. For the amination of 2-pyridin-2-ylbenzene a kinetic deuterium isotope effect of 2.0 was determined

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Hua, Jia; Gao, Lu; Li, Baiyan published the article 《Bis(4-amino-3,5-di-2-pyridyl-1,2,4-triazole-κ2N1,N5)diaquazinc(II) dinitrate》. Keywords: crystal structure zinc aminodipyridyltriazole aqua complex dinitrate; mol structure zinc aminodipyridyltriazole aqua complex nitrate; hydrogen bond zinc aminodipyridyltriazole aqua complex dinitrate; pyridyltriazole aminodi zinc aqua complex dinitrate; triazole aminodipyridyl zinc aqua complex dinitrate.They researched the compound: 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine( cas:1671-88-1 ).HPLC of Formula: 1671-88-1. 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:1671-88-1) here.

The asym. unit of bis(4-amino-3,5-di-2-pyridyl-1,2,4-triazole-κ2N1,N5)diaquazinc(2+) dinitrate, [Zn(C12H10N6)2(H2O)2](NO3)2, contains 1/2 of the complex mol. and 1 NO3-. The ZnII ion displays a distorted tetragonal-pyramidal geometry with 4 N atoms from 2 chelating 4-amino-3,5-di-2-pyridyl-1,2,4-triazole (2-bpt) ligands in the basal plane and 1 H2O mol. occupying the apical site. Another H2O mol. at the opposite of the apical site has a weak interaction with the ZnII ion [Zn-O = 2.852(5) Å]. The ZnII ion and the 2 H2O mols. lie on a 2-fold rotation axis. An extensive system of H bonds involving the NH2 groups of the 2-bpt ligands, H2O mols. and nitrate anions links all residues into a 3-dimensional network. Crystallog. data are given.

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Related Products of 1671-88-1. Aromatic compounds can be divided into two categories: single heterocycles and fused 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 Synthesis, structure and electrochemistry of a novel dinuclear cobalt(II) complex containing pyrrole units: an unusual reductive electropolymerization of the dinuclear cobalt(II) complex. Author is Mandal, Sanat K.; Clase, Howard J.; Bridson, John N.; Ray, Soma.

4-(1H-pyrrole-1-yl)-3,5-bis(pyridine-2-yl)-1,2,4-triazole (L) was prepared and used to prepare [Co2L2(H2O)4]Cl4.2MeOH.2H2O which was characterized by elemental anal., x-ray crystallog., and electrochem. The complex undergoes reductive electropolymerization, forming films on a glassy carbon electrode. The polymer is fairly conductive (∼2 × 10-6 Ω-1 cm-1 at -1.40 V vs. SCE). Electroreduction of CO2 occurs at the polymer film-modified electrode.

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Gupta, Gajendra; Prasad, Kota Thirumala; Das, Babulal; Rao, Kollipara Mohan 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 ).Application In Synthesis of 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine. 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 quite general approach for the preparation of η5-and η6-cyclic hydrocarbon platinum group metal complexes is reported. The dinuclear arene ruthenium complexes [(η6-arene)Ru(μ-Cl)Cl]2 (arene = C6H6, C10H14 and C6Me6) and η5-pentamethylcyclopentadienyl rhodium and iridium complexes [(η6-C5Me5)M(μ-Cl)Cl]2 (M = Rh, Ir) react with 2 equivalent of 4-amino-3,5-di-pyridyltriazole (dpt-NH2) in presence of NH4PF6 to afford the corresponding mononuclear complexes of the type [(η6-arene)Ru(dpt-NH2)Cl]PF6 {arene = C10H14 (1), C6H6 (2) and C6Me6 (3)} and [(η6-C5Me5)M(dpt-NH2)Cl]PF6 {M = Rh (4), Ir (5)}. However, the mononuclear η5-cyclopentadienyl analogs such as [(η5-C5H5)Ru(PPh3)2Cl], [(η5-C5H5)Os(PPh3)2Br], [(η5-C5Me5)Ru(PPh3)2Cl] and [(η5-C9H7)Ru(PPh3)2Cl] complexes react in presence of 1 equivalent of dpt-NH2 and 1 equivalent of NH4PF6 in methanol yielded mononuclear complexes [(η5-C5H5)Ru(PPh3)(dpt-NH2)]PF6 (6), [(η5-C5H5)Os(PPh3)(dpt-NH2)]PF6 (7), [(η5-C5Me5)Ru(PPh3)(dpt-NH2)]PF6 (8) and [(η5-C9H7)Ru(PPh3)(dpt-NH2)]PF6 (9), resp. These compounds have been totally characterized by IR, NMR and mass spectrometry. The mol. structures of 4 and 6 have been established by single crystal x-ray diffraction and some of the representative complexes have also been studied by UV-Vis spectroscopy.

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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: 1671-88-1, is researched, SMILESS is NN1C(C2=NC=CC=C2)=NN=C1C3=NC=CC=C3, Molecular C12H10N6Journal, Polyhedron called Spin crossover (SCO) iron(II) coordination polymer chain: Synthesis, structural and magnetic characterizations of [Fe(abpt)2(μ-M(CN)4)] (M = PtII and NiII), Author is Setifi, Fatima; Charles, Catherine; Houille, Sylvie; Thetiot, Franck; Triki, Smail; Gomez-Garcia, Carlos J.; Pillet, Sebastien, the main research direction is iron platinum nickel dinuclear cyanide pyridinyltriazole coordination polymer preparation; crystal structure dinuclear iron platinum nickel cyanide coordination polymer; spin crossover heterodinuclear iron cyanide pyridinyltriazole coordination polymer chain.Safety of 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine.

New Fe(II) coordination polymeric neutral chains [Fe(abpt)2(μ-M(CN)4)], with M = PtII (1), NiII (2) and abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole, were synthesized and characterized by IR spectroscopy, x-ray diffraction and magnetic measurements. The two compounds are isostructural as deduced from a Rietveld anal. of x-ray powder diffraction data of 2 simulated from the single crystal structure of 1. The crystal packing of 1 is formed by regular chains running along the crystallog. [-1 0 1] direction where the planar [Pt(CN)4]2- anion acts as a μ2-bridging ligand via two N atoms of two different trans cyano groups, while the two abpt mols. act as chelating ligands. Along the neutral chains, the Fe···Pt distances are imposed by the cyano groups of the [Pt(CN)4]2- moiety (5.027 and 5.022 Å at 294 and 150 K, resp.), leading to Fe···Fe intrachain distances of 10.055 and 10.045 Å at 294 and 150 K, resp. The thermal dependence of the product of the molar magnetic susceptibility times the temperature (χmT) for compound 1 shows a constant value close to 0.2 emu K mol-1 in the temperature range 10-300 K in the cooling and warming scans. Above 300 K, compound 1 shows a SCO transition from the LS to the HS configuration although the transition is not fully achieved at 400 K.

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Safety of 5-Bromo-3-methoxypyridin-2-amine. 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: 5-Bromo-3-methoxypyridin-2-amine, is researched, Molecular C6H7BrN2O, CAS is 42409-58-5, about Directing Group Enables Electrochemical Selectively Meta-Bromination of Pyridines under Mild Conditions.

Without the use of catalysts and oxidants, a facile and sustainable electrochem. bromination protocol was developed. By introducing the directing groups, the regioselectivity of pyridine derivatives could be controlled at the meta-position utilizing the inexpensive and safe bromine salts at room temperature A variety of brominated pyridine derivatives were obtained in 28-95% yields, and the reaction could be readily performed at a gram scale. By combining the installation and removing the directing group, the concept of meta-bromination of pyridines could be verified.

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SDS of cas: 156478-71-6. 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: 2-(4-(tert-Butoxycarbonyl)piperazin-1-yl)acetic acid, is researched, Molecular C11H20N2O4, CAS is 156478-71-6, about Potent Body Weight-Lowering Effect of a Neuromedin U Receptor 2-selective PEGylated Peptide.

Neuromedin U (NMU) is a neuropeptide that mediates a variety of physiol. functions via its receptors, NMUR1 and NMUR2. Recently, there has been an increased focus on NMU as a promising treatment option for diabetes and obesity. A short form of NMU (NMU-8) has potent agonist activity for both receptors but is metabolically unstable. Therefore, we designed and synthesized NMU-8 analogs modified by polyethylene glycol (PEG; mol. weight, 20 kDa; PEG20k) via a linker. 3-(2-Naphthyl)alanine substitution at position 19 increased NMUR2 selectivity of NMU-8 analogs with retention of high agonist activity. Compound 37, an NMUR2-selective PEG20k analog containing piperazin-1-ylacetyl linker, exhibited a potent body weight-lowering effect with concomitant inhibition of food intake in a dose-dependent manner (body weight loss of 12.4% at 30 nmol/kg) by once-daily repeated dosing for 2 wk in mice with diet-induced obesity.

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Category: isoquinoline. 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 New copper(I) complex with triazole derivative ligand containing α-diimine moiety: synthesis, structure, luminescence and electrochemistry. Author is Wang, Wen-Jwu; Lin, Chien-Ho.

One cuprous complex [Cu(L)(PPh3)I] was obtained by reaction of [Cu(PPh3)3I] with a new α-diimine ligand L (N-diphenylmethylene-3,5-di(2′-pyridyl)-4-amino-1,2,4-triazole). The complex was characterized by UV-visible, luminescence, 1H NMR spectroscopy and cyclic voltammetric study. The structure of ligand L and complex are confirmed by single crystal x-ray diffraction study. [Cu(L)(PPh3)I] crystallizes in the monoclinic space group P21/c with a 19.9291(4), b 10.0691(2), c 21.9245(5) Å,β 92.481(10)°, and Z = 4. The complex shows a MLCT band in the 350-545 nm region and exhibits luminescent emission at 600 nm at room temperature in CH2Cl2 solution Cyclic voltammogram of [Cu(L)(PPh3)I] shows a quasi-reversible redox couple of the Cu center at 0.67 V for Cu(I)/Cu(II) and an irreversible reduction potential at -0.98 V accompanied by a stripping peak of Cu at -0.11 V for Cu(I)/Cu(0).

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Wen, Jian; Wang, Dingyi; Qian, Jiasheng; Wang, Di; Zhu, Chendan; Zhao, Yue; Shi, Zhuangzhi published an article about the compound: Diphenyl-2-pyridylphosphine( cas:37943-90-1,SMILESS:P(C1=CC=CC=C1)(C2=CC=CC=C2)C3=NC=CC=C3 ).Safety of Diphenyl-2-pyridylphosphine. 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:37943-90-1) through the article.

Transition-metal-mediated metalation of an aromatic C-H bond that is adjacent to a tertiary phosphine group in arylphosphines via a four-membered chelate ring was first discovered in 1968. Herein, we overcome a long-standing problem with the ortho C-H activation of arylphosphines in a catalytic fashion. In particular, we developed a rhodium-catalyzed ortho-selective C-H borylation of various com. available arylphosphines with B2pin2 through PIII-chelation-assisted C-H activation. This discovery is suggestive of a generic platform that could enable the late-stage modification of readily accessible arylphosphines.

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Formula: C12H10N6. 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: 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine, is researched, Molecular C12H10N6, CAS is 1671-88-1, about Spin crossover in six-coordinate [Fe(L)2(NCX)2] compounds with L = DPQ = 2,3-bis-(2′-pyridyl)quinoxaline, ABPT = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole and X = S, Se: synthesis, magnetic properties and single crystal studies. Author is Moliner, Nicolas; Munoz, M. Carmen; Van Koningsbruggen, Petra J.; Real, Jose Antonio.

The Fe(II) compounds [Fe(DPQ)2(NCS)2]·COMe2 (DPQ = 2,3-bis-(2′-pyridyl)quinoxaline) (1) and [Fe(ABPT)2(NCX)2] [ABPT = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole, X = S (2) and Se (3)] were synthesized and the crystal structure of 1 determined by x-ray diffraction methods. It crystallizes in the monoclinic system space group P21/n, a 12.057(2), b 22.474(5), c 15.004(7) Å, β 109.76(3)°, Z = 4 and T = 293 K. The structure is made up of discrete [Fe(DPQ)2(NCS)2] units. Each metal atom is in a distorted FeN6 octahedral environment, the Fe-N bonds ranging from 2.013(8) Å to 2.425(8) Å. Variable-temperature magnetic susceptibility data in the temperature range 290-4.2 K revealed that 1 is high spin, in contrast to 2 and 3 which show a moderately cooperative high spin (HS ↔ LS) transition, centered at T1/2 = 186 K and 224 K for 2 and 3, resp. The thermodn. model of Slichter and Drickamer was applied to account for the magnetic data. The intermol. interaction parameters, the enthalpy and entropy changes associated with the spin transition of 2 were estimated as Γ = 2.3 kJ mol-1, ΔH = 10.7 kJ mol-1 and ΔS = 58 J mol-1 K-1, resp.

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