نتایج جستجو برای: 4 triazine

تعداد نتایج: 1305627  

Journal: :Journal of the Brazilian Chemical Society 2021

4-Aminopyrrolo[2,1-f][1,2,4]triazine is a fundamental raw material in the synthesis of remdesivir, which demand has increased due to tests and potential repositioning this drug against Coronavirus disease 2019 (COVID-19). Here, three chemical steps route for preparation remdesivir’s nucleobase described. Particularly, highly chemoselective cyanation Klein’s successful application monochloramine...

2012
Hong-Hua Sun Zhi-Yong Hu Duan-Lin Cao

In the title compound, C(23)H(46)N(6)O(2), the two hy-droxy groups are located on opposite sides of the triazine ring. One of the hy-droxy groups links with the triazine N atom via an intra-molecular O-H⋯N hydrogen bond. Inter-molecular O-H⋯N and N-H⋯O hydrogen bonding is observed in the crystal structure. π-π stacking is also observed between parallel triazine rings of adjacent mol-ecules, the...

2014
Salha Hamri Abderrafia Hafid Mostafa Khouili Lahcen El Ammari El Mostafa Ketatni

In the mol-ecule of the title compound, C10H9N3S, the dihedral angle between the triazine and phenyl rings is 11.77 (7)°. In the crystal, mol-ecules are linked by π-π stacking inter-actions [centroid-centroid distances = 3.7359 (3) and 3.7944 (4) Å], forming layers parallel to the bc plane.

Journal: :Chemical communications 2013
Asamanjoy Bhunia Vera Vasylyeva Christoph Janiak

Transformation of tetra(4-cyanophenyl)ethylene under Lewis acidic (ZnCl2) conditions at 400 °C leads to the formation of a porous covalent triazine-based organic framework (CTF) with a high surface area (2235 m(2) g(-1)), high CO2 and CH4 uptakes and the highest hydrogen uptake for a CTF material (1.86 wt% at 77 K, 1 bar).

Journal: :Chemical communications 2005
Shuhei Furukawa Masaaki Ohba Susumu Kitagawa

A novel 2-D coordination polymer with honeycomb (6,3) net topology is constructed from a paramagnetic paddlewheel diruthenium tetrabenzoate, [RuII2(O2CPh)4], as a linear linker motif and triazine as a three-connected node; the RuII2 cores are positioned on nodes of a 2-D Kagome lattice.

Journal: :The journal of physical chemistry. A 2008
Vadim A Mozhayskiy John D Savee Jennifer E Mann Robert E Continetti Anna I Krylov

The highly debated three-body dissociation of sym-triazine to three HCN products has been investigated by translational spectroscopy and high-level ab initio calculations. Dissociation was induced by charge exchange between the sym-triazine radical cation and cesium. Calculated state energies and electronic couplings suggest that sym-triazine is produced in the 3s Rydberg and pi* <-- n manifold...

2010
Ya-Tuan Ma Hong-Quan Li Xin-Wei Shi An-Ling Zhang Jin-Ming Gao

The title compound, C(13)H(11)Cl(2)N(3)O(2), was obtained by the reaction of eugenol and cyanuric chloride. The dihedral angle between the benzene and triazine rings is 87.56 (4)°. Two C atoms of the allyl group are disordered over two sites in a 0.72 (2):0.28 (2) ratio.

2010
Fang-Fang Jian Ping Ren

In the mol-ecule of the title compound, C(20)H(14)N(4), the triazine ring is attached to two phenyl rings and one pyridine ring. In the crystal, mol-ecules are linked by inter-molecular C-H⋯N hydrogen bonds. The crystal packing is also stabilized by C-H⋯π inter-actions.

Journal: :Journal of AOAC International 2001
T C Mueller S A Senseman K H Carson A S Sciumbato

Empore disks were used to successfully extract herbicide residues from a difficult-to-analyze surface water source and deionized water. Herbicide recoveries were lower in surface water at 7,14, or 21 days after fortification and storage at 4 degrees C, presumably due to chemical sorption onto precipitated organic particulates. The addition of acid to the samples, as recommended in EPA Method 52...

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