Day: April 7, 2022

Related Products of 14389-12-9. 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: 5-(4-Pyridyl)-1H-tetrazole, is researched, Molecular C6H5N5, CAS is 14389-12-9, about A New Main Group Metal Coordination Polymer: Synthesis, Structure, and Dielectric Constant Property of [Na(C6H4N5)(H2O)2]n. Author is Fu, Da-Wei; Ge, Jia-Zhen; Zhang, Yi; Ye, Heng-Yun.

The reaction of NaOH with 4-(2H-tetrazol-5-yl)pyridine affords the first tetrazole-pyridine sodium coordination polymer with chain structure, [Na(C6H4N5)(H2O)2]n (1). The compound could be characterized by single-crystal x-ray diffraction anal. The temperature dependence of dielec. permittivity remains unchanged almost within the measured temperature range of 80 K to 270 K at 1 MHz, and the frequency dependence of the permittivity showed rapidly drops from 31.5 to 4.3 within the measured frequency range of 200 to 1 MHz at room temperature

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Tri(naphthalen-1-yl)phosphine, is researched, Molecular C30H21P, CAS is 3411-48-1, about Interface chemistry of organophosphorus compounds. II. Spreading behavior of aromatic, mixed aromatic-n-aliphatic, aromatic-cycloaliphatic, or aliphatic-cycloaliphatic phosphines.SDS of cas: 3411-48-1.

The aromatic phosphines, PRR21 (I), where R, R1 = Ph, α- or β-naphthyl, p-biphenylyl, or anthryl), or their oxides do not form monolayers at the air/H2O interface, due to the electron withdrawing character of the aromatic rings, which makes the free electron pair of P unavailable for solvation. The introduction of Me as an electron repelling group, as in tri-p-tolylphosphine, leads to the formation of multimol. films. The mol. area of the nonspreading I (R = R1 = Ph) (Ia) was determined from the increase in area caused by the addition of Ia to the spreading I (R = R1 = n-C8H17). The mol. of Ia is pyramidal in the mixed films. The spreading properties of mixed I, where R, R1 = aliphatic or aromatic., are a combination of the properties of the individual I, where R = R1 = aliphatic or aromatic. I (R = R1 = cyclohexyl) (Ib) forms real gas-analogous films. The observed mol. area is smaller than the calculated area, due to the bulky structure of the cyclohexyl groups. Replacement of 1-2 cyclohexyl groups with aliphatic or aromatic groups results in improvement or deterioration resp. of the spreading properties of the phosphines.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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: 20198-19-0, is researched, SMILESS is O=C1NC(N)=NC2=C1C=CC=C2, Molecular C8H7N3OJournal, Chemical Physics called Electronic spectra of some pterins and deazapterins, Author is Wormell, Paul; Gready, Jill E., the main research direction is electron spectra pterin deazapterin; tautomerism electron spectra pterin deazapterin; protonation electron spectra pterin deazapterin.COA of Formula: C8H7N3O.

The electronic absorption spectra of some derivatives of pterin and N5-deazapterin are analyzed using the CNDO/S-CI method, including allowance for solvent shifts. These calculations give good agreement with the spectra, which may be assigned to a group of π*←π transitions. There are some differences between calculated values for gas-phase and solution models but their general level of conformity with experiment is similar. Band shifts caused by Me substitution, protonation and replacement of ring nitrogens are investigated, and a number of structural and spectroscopic problems are addressed. The spectral predictions agree well with exptl. assignments for tautomeric forms and protonation sites for known compounds, and predictions are made for the spectra of N8-deazapterin and N5,N8-dideazapterin which have not been reported.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Wang, Cun-Kuan; Li, Xiao-Yan published an article about the compound: 5-(4-Pyridyl)-1H-tetrazole( cas:14389-12-9,SMILESS:C1(C2=NN=NN2)=CC=NC=C1 ).Category: chiral-nitrogen-ligands. 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:14389-12-9) through the article.

The title three-dimensional coordination polymer, [Cu2Cl(C6H4N5)]n, is the product of the hydrothermal reaction of CuCl2·2H2O and 5-(4-pyridyl)-1H-tetrazole (4-Hptz). The two independent CuI ions are coordinated in distorted tetrahedral and distorted trigonal coordination environments. In the unique 5-(4-pyridyl)-1H-tetrazolate ligand, the dihedral angle between the pyridine and tetrazole rings is 17.3 (2)°. Crystallog. data are given.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Name: 2-Chloro-5-pyridinesulfonyl chloride. 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-Chloro-5-pyridinesulfonyl chloride, is researched, Molecular C5H3Cl2NO2S, CAS is 6684-39-5, about Aqueous Process Chemistry: The Preparation of Aryl Sulfonyl Chlorides.

The use of aqueous acidic conditions for the preparation of arylsulfonyl chlorides from diazonium salts in the presence of copper salts, preferably CuCl, together with thionyl chloride as the sulfur dioxide source, has considerable advantages over recommended literature procedures, whereby reactions are carried out in acetic acid with minimization of water content of the solvent. The method was successful for a wide range of electron-deficient and electron-neutral aryl substrates. The sulfonyl chlorides are protected from hydrolysis by their low solubility in water, which results in direct precipitation from the reaction mixture in good yields (>70%) and high strength (>98% weight/weight). The aqueous process, which is addnl. safer and more robust, can be readily scaled up and has significant environmental benefits.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

COA of Formula: C5H10Br2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about The one-pot synthesis of butyl-1H-indol-3-alkylcarboxylic acid derivatives in ionic liquid as potent dual-acting agent for management of BPH. Author is Zeng, Li-Yan; Yang, Fubiao; Chen, Kaixuan; Zeng, Yunong; Jiang, Zhenzhou; Liu, Shuwen; Xi, Baomin.

Based on the SAR of both α1-AR antagonists and 5α-reductase (5AR) inhibitors, the dual-acting agent 4-(1-(4-(4-(2-methoxyphenyl)piperazin-1-yl)butyl)-1H-indol-3-yl)butanoic acid was designed against BPH and synthesized by two steps of N-alkylation. One-pot protocol towards 4-(1-(4-(4-(2-methoxyphenyl)piperazin-1-yl)butyl)-1H-indol-3-yl)butanoic acid was newly developed. With IL [C6min]Br as solvent, the yield of 4-(1-(4-(4-(2-methoxyphenyl)piperazin-1-yl)butyl)-1H-indol-3-yl)butanoic acid was increased to 75.1% from 16.0% and the reaction time was shortened in 1.5 h from 48 h. 25 derivatives structurally based on arylpiperazine and indolyl butyric acid with alkyl linker were prepared The protocol was extended to get another 14 derivatives wherein O-alkylation was involved, and applied to the synthesis of biol. efficient mols. DPQ and Aripiprazole. Expectedly, 4-(1-(4-(4-(2-methoxyphenyl)piperazin-1-yl)butyl)-1H-indol-3-yl)butanoic acid exhibited dual inhibition of α1-AR and 5α-reductase, and exhibited no obvious cytotoxicity against human cells. The pharmacokinetic properties of 4-(1-(4-(4-(2-methoxyphenyl)piperazin-1-yl)butyl)-1H-indol-3-yl)butanoic acid was also determined

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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 Crystal engineering: Toward intersecting channels from a neutral network with a bcu-type topology, published in 2005-09-19, which mentions a compound: 14389-12-9, Name is 5-(4-Pyridyl)-1H-tetrazole, Molecular C6H5N5, Application of 14389-12-9.

Although the structure of the body centered cubic (bcu) net is commonly found in textbooks, its eight-connected topol. is extremely rare in metal-organic frameworks owing to severe geometric requirements. The 1st example of a highly porous, neutral bcu-type framework, {[Cu3Cl2L4(H2O)2].3DMF.5H2O}n (I), assembled from a unique eight-connected tricopper cluster and a 5-(4-pyridyl)tetrazolate ligand (L-) as linker is reported. I is orthorhombic, space group , Z = 2, R1 = 0.0725, wR2 = 0.0399.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Rational synthesis, structural characterization, theoretical studies, antibacterial activity and selective dye absorption of new silver coordination polymers generated from a flexible bis (imidazole-2-thione) ligand, the main research direction is silver pentadienyl bisdihydroimidazolethione coordination polymer preparation luminescence thermal stability; bactericide luminescence band gap silver pentadienyl bisdihydroimidazolethione coordination polymer; crystal structure silver pentadienyl bisdihydroimidazolethione coordination polymer.Quality Control of 1,5-Dibromopentane.

Herein, a competition between the different anions with different size, shape and coordination ability was used for the synthesis of three silver(I)-coordination polymers (Ag-CPs) was investigated. In this study, three 3D-supra-mol. coordination compounds namely, [Ag2L(NO3)2]n (1), {[Ag2L][PF6]2}n (2) and [AgLBr]n (3) (L = 1,1′-(1,5-pentadienyl)bis-(1,3-dihydro-3-methyl-1H-imidazole-2-thione)) were synthesized and fully characterized via a single crystal X-ray diffraction, powder X-ray diffraction (PXRD), elemental anal. (CHN), FT-IR spectra and thermo gravimetric anal. (TGA). Structural anal. revealed that the counter ions have a notable impact in directing the conformation and coordination mode of ligand, but they have no effect on the structural dimension of the polymers. Furthermore, by increasing the coordination ability of the anions, the coordination geometry of the AgI centers change, from a distorted linear (for 2) to a distorted square pyramidal coordination geometry (for 1). The chains are further stabilized by the intermol. C-H···O and C-H···N for 1, P-F…H-C for 2, C-H···Br and C-H···N interactions for 3 to form a 3D non-covalent lattice network structure. In contrast to 1 and 3, polymer 2 exhibits a large capacity and selectivity to adsorb dye from aqueous solutions Sorption kinetic was investigated by three kinetic models. The electronic band structure and the projection densities of states (PDOS) of compounds 1 and 3 were investigated by means of DFT-D3. The results demonstrated that both compounds are non-magnetic and show a semiconducting character with a direct band gap of ∼3 eV. All of the synthesized compounds, possess antibacterial activity against the selected strain of Gram- neg. (Escherichiacoli, Pseudomonas aeruginosa) and Gram- pos. (Staphylococcus aureus, Bacillus subtilis) bacteria.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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: 3411-48-1, is researched, SMILESS is C1=CC2=C(C=C1)C(=CC=C2)P(C1=CC=CC2=C1C=CC=C2)C1=CC=CC2=C1C=CC=C2, Molecular C30H21PJournal, Russian Journal of Organic Chemistry called Polarity and Conformational Analysis of Tri(1-naphthyl)phosphine, Tri(2-naphthyl)phosphine, and Their Chalcogenides, Author is Kuznetsova, A. A.; Chachkov, D. V.; Belogorlova, N. A.; Kuimov, V. A.; Malysheva, S. F.; Vereshchagina, Ya. A., the main research direction is naphthylphosphine chalcogenide preparation conformational analysis DFT polarity dipole moment; phosphine naphthyl chalcogenide preparation conformational analysis DFT polarity.Synthetic Route of C30H21P.

Abstract: The polarity and structure of tri(1- or 2-naphthyl)phosphines and their chalcogenides were determined by the methods of dipole moments, IR spectroscopy, and DFT quantum-chem. calculations at the B3PW91/6-311++G(df,p) level of theory. In solution, tri(1-naphthyl)phosphine prefers a single conformer with a gauche,gauche,gauche orientation of the substituents at the P. Tri(2-naphthyl)phosphine, as well as both phosphine chalcogenides exist as equilibrium mixtures of several forms with a propeller arrangement of the substituents and a cis or gauche orientation of the Csp2-Csp2 and P=X (X = LEP, O, S, Se) bonds.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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: 20198-19-0, is researched, SMILESS is O=C1NC(N)=NC2=C1C=CC=C2, Molecular C8H7N3OJournal, Khimiya Geterotsiklicheskikh Soedinenii called Acylation of 2-amino-4-quinazolones unsaturated acyl chlorides, Author is Yun, L. M.; Nazhimov, K. O.; Masharipov, S.; Samiev, R. A.; Makhmudov, S. A.; Kasymova, S. S.; Vergizov, S. N.; V’yunov, K. A.; Shakhidoyatov, Kh. M., the main research direction is acylation aminoquinazolone unsaturated chloride; pyrimidoquinazolinedione; quinazolone amino acylation unsaturated chloride.Safety of 2-Aminoquinazolin-4(3H)-one.

Condensation of quinazolone I by R1CH:CRCOCl (R = Me, R1 = H; R = H, R1 = Me, Ph) in DMF containing Et3N gave 36-70% acylated derivatives II which (R = Me, R1 = H) underwent intramol. cycloaddition at 250-260° to give 43% pyrimidoquinazolinedione III. Addnl. acylations of the 2-Me derivative of I gave 15-49% quinazolones IV.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis