Tag: M.W=50-100

Li, Changxia published the artcileCovalent Organic Framework (COF) Derived Ni-N-C Catalysts for Electrochemical CO2 Reduction: Unraveling Fundamental Kinetic and Structural Parameters of the Active Sites, HPLC of Formula: 1455-77-2, the main research area is covalent organic framework carbon dioxide electrochem reduction catalyst; Active Site Density; CO2 Reduction; Covalent Organic Framework; Single-Site Ni-N-C; Turnover Frequency.

Electrochem. CO2 reduction is a potential approach to convert CO2 into valuable chems. using electricity as feedstock. Abundant and affordable catalyst materials are needed to upscale this process in a sustainable manner. Nickel-nitrogen-doped carbon (Ni-N-C) is an efficient catalyst for CO2 reduction to CO, and the single-site Ni-Nx motif is believed to be the active site. However, critical metrics for its catalytic activity, such as active site d. and intrinsic turnover frequency, so far lack systematic discussion. In this work, we prepared a set of covalent organic framework (COF)-derived Ni-N-C catalysts, for which the Ni-Nx content could be adjusted by the pyrolysis temperature The combination of high-angle annular dark-field scanning transmission electron microscopy and extended X-ray absorption fine structure evidenced the presence of Ni single-sites, and quant. X-ray photoemission addressed the relation between active site d. and turnover frequency.

Angewandte Chemie, International Edition published new progress about Carbon nanotubes. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, HPLC of Formula: 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhang, Xingcheng published the artcileSynthesis and Investigation of 2,4,6-Trinitropyridin-3-ol and its Salts, Recommanded Product: 3,5-Diamino-1,2,4-triazole, the main research area is trinitropyridinol salt thermal decomposition phys property.

A series of novel energetic salts of 2,4,6-trinitropyridin-3-ol have been prepared and confirmed structurally. These compounds can be prepared by means of a facile synthetic procedure and show outstanding properties (detonation velocity, detonation pressure, sensitivity toward mech. stimuli, and temperature of decomposition). They were isolated and characterized by means of elemental anal., multinuclear (1H, 13C) NMR spectroscopy. The structures in the crystalline state were determined by single-crystal X-ray diffraction at 296 K. From the calculated standard molar enthalpy of formation (CBS-4 M) and the densities, the Chapman-Jouguet detonation properties were predicted by using the EXPLO5 V6.02 thermochem. computer code. Their sensitivities towards impact and friction were also determined

Propellants, Explosives, Pyrotechnics published new progress about Computer program. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Recommanded Product: 3,5-Diamino-1,2,4-triazole.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Pismataro, Maria Chiara published the artcile1,2,4-Triazolo[1,5-a]pyrimidines: Efficient one-step synthesis and functionalization as influenza polymerase PA-PB1 interaction disruptors, Safety of 3,5-Diamino-1,2,4-triazole, the main research area is triazolopyrimidine preparation antiviral influenza polymerase PA PB1 interaction disruptor; 1,2,4-triazolo[1,5-a]pyrimidines; Antiviral agents; Influenza polymerase; Influenza virus; PA-PB1 interaction; Protein-protein interaction; SARS-CoV-2.

In the search for new anti-influenza virus (IV) compounds, the 1,2,4-triazolo[1,5-a]pyrimidine (TZP) was identified as a very suitable scaffold to obtain compounds able to disrupt IV RNA-dependent RNA polymerase (RdRP) PA-PB1 subunits heterodimerization. To this aim, four facile and efficient one-step procedures for the synthesis of 5-phenyl-, 6-phenyl- and 7-phenyl-2-amino-[1,2,4]triazolo[1,5-a]pyrimidines, and 2-amino-5-phenyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol has been developed. Two analogs having the Et carboxylate moiety at the C-2 position of the TZP were also prepared in good yields. Then, the scaffolds herein synthesized and two previous scaffolds were functionalized and evaluated for their anti-IAV activity, leading to the identification of compound 2-(5-Methyl-7-phenyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)-4H-benzo[d][1,3]oxazin-4-one that showed both anti-PA-PB1 (IC50 = 19.5μM) and anti-IAV activity (EC50 = 16μM) at non-toxic concentrations, thus resulting among the most active TZP derivatives reported to date by us. A selection of the synthesized compounds, along with a set of inhouse available analogs, was also tested against SARS-CoV-2. The most promising compound N-(2-Fluorophenyl)-7-methyl-5-phenyl-[1,2,4]triazolo[1,5-a]pyrimidine-2-carboxamide from this series displayed an EC50 value of 34.47μM, highlighting the potential of the TPZ scaffold in the search for anti-CoV agents.

European Journal of Medicinal Chemistry published new progress about Antiviral agents. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Safety of 3,5-Diamino-1,2,4-triazole.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Pismataro, Maria Chiara published the artcile1,2,4-Triazolo[1,5-a]pyrimidines: Efficient one-step synthesis and functionalization as influenza polymerase PA-PB1 interaction disruptors, HPLC of Formula: 1455-77-2, the main research area is triazolopyrimidine preparation antiviral influenza polymerase PA PB1 interaction disruptor; 1,2,4-triazolo[1,5-a]pyrimidines; Antiviral agents; Influenza polymerase; Influenza virus; PA-PB1 interaction; Protein-protein interaction; SARS-CoV-2.

In the search for new anti-influenza virus (IV) compounds, the 1,2,4-triazolo[1,5-a]pyrimidine (TZP) was identified as a very suitable scaffold to obtain compounds able to disrupt IV RNA-dependent RNA polymerase (RdRP) PA-PB1 subunits heterodimerization. To this aim, four facile and efficient one-step procedures for the synthesis of 5-phenyl-, 6-phenyl- and 7-phenyl-2-amino-[1,2,4]triazolo[1,5-a]pyrimidines, and 2-amino-5-phenyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol has been developed. Two analogs having the Et carboxylate moiety at the C-2 position of the TZP were also prepared in good yields. Then, the scaffolds herein synthesized and two previous scaffolds were functionalized and evaluated for their anti-IAV activity, leading to the identification of compound 2-(5-Methyl-7-phenyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)-4H-benzo[d][1,3]oxazin-4-one that showed both anti-PA-PB1 (IC50 = 19.5μM) and anti-IAV activity (EC50 = 16μM) at non-toxic concentrations, thus resulting among the most active TZP derivatives reported to date by us. A selection of the synthesized compounds, along with a set of inhouse available analogs, was also tested against SARS-CoV-2. The most promising compound N-(2-Fluorophenyl)-7-methyl-5-phenyl-[1,2,4]triazolo[1,5-a]pyrimidine-2-carboxamide from this series displayed an EC50 value of 34.47μM, highlighting the potential of the TPZ scaffold in the search for anti-CoV agents.

European Journal of Medicinal Chemistry published new progress about Antiviral agents. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, HPLC of Formula: 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wu, Yunling published the artcile2D molecular sheets of hydrogen-bonded organic frameworks for ultrastable sodium-ion storage, Synthetic Route of 1455-77-2, the main research area is hydrogen bonded organic framework sodium ion secondary battery; chemical stability; hydrogen-bonded organic frameworks; molecular sheets; multi-site hydrogen bonds; sodium ion storage.

There has been growing research interest in hydrogen bonded organic frameworks (HOFs) by virtue of their great structural crystallinity, large surface areas and porosity. Their potential in electrochem. applications, unfortunately, remains elusive because weak hydrogen bonds would dissociate in solution that eventually compromises the structural integrity. Herein, it is demonstrated that this issue may be overcome by designing and introducing multisite hydrogen bonding within HOFs. 2D mol. sheets are prepared using diaminotriazole as the linkers for the first time. In spite of the mol. thickness (≈1 nm), they are chem. stable and mech. robust, and have diminished solubility in most polar or nonpolar organic solvents. This solution-stable HOF exhibits an excellent electrochem. performance for Na+ ion storage. In particular, it enables an exceptional cycle life of >10 000 cycles at 1 A g-1, which is far superior to most other organic electrode materials. Theor. simulations indicate that the activation barrier for the intralayer or interlayer diffusion of Na+ ions within the organic frameworks is small.

Advanced Materials (Weinheim, Germany) published new progress about Battery cathodes. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Synthetic Route of 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wu, Yunling published the artcile2D molecular sheets of hydrogen-bonded organic frameworks for ultrastable sodium-ion storage, Synthetic Route of 1455-77-2, the main research area is hydrogen bonded organic framework sodium ion secondary battery; chemical stability; hydrogen-bonded organic frameworks; molecular sheets; multi-site hydrogen bonds; sodium ion storage.

There has been growing research interest in hydrogen bonded organic frameworks (HOFs) by virtue of their great structural crystallinity, large surface areas and porosity. Their potential in electrochem. applications, unfortunately, remains elusive because weak hydrogen bonds would dissociate in solution that eventually compromises the structural integrity. Herein, it is demonstrated that this issue may be overcome by designing and introducing multisite hydrogen bonding within HOFs. 2D mol. sheets are prepared using diaminotriazole as the linkers for the first time. In spite of the mol. thickness (≈1 nm), they are chem. stable and mech. robust, and have diminished solubility in most polar or nonpolar organic solvents. This solution-stable HOF exhibits an excellent electrochem. performance for Na+ ion storage. In particular, it enables an exceptional cycle life of >10 000 cycles at 1 A g-1, which is far superior to most other organic electrode materials. Theor. simulations indicate that the activation barrier for the intralayer or interlayer diffusion of Na+ ions within the organic frameworks is small.

Advanced Materials (Weinheim, Germany) published new progress about Battery cathodes. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Synthetic Route of 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wang, Hao published the artcileNitrogen heterocyclic/phosphaphenanthrene derivative as a reactive additive for simultaneous improvement of flame retardancy, mechanical and dielectric properties of epoxy resins, Name: 3,5-Diamino-1,2,4-triazole, the main research area is nitrogen based reactive additive improve phys property epoxy resin.

Various approaches have been successfully applied to solve the flammability of epoxy resin (EP) materials, but enhanced flame retardance of EP is often along with deteriorated glass transition temperature (Tg) and mech. property. In order to prepare EP composites with good comprehensive performance, we synthesized a phosphorus-containing triazole derivative named TBO from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 3,5-diamino-triazole and salicylaldehyde, and attached it into epoxy framework. With 0.75 wt% phosphorus loading, the 0.75-TBO/EP composite had a V-0 rating and a limiting oxygen index of 33%. 1.0-TBO/EP composite also had a V-0 rating and acquired a decrease of 37.6% in peak heat release rate. In addition, the tensile strength and flexural strength of 0.75-TBO/EP increased to 63.9 MPa and 146 MPa from 59 MPa and 134 MPa of EP resp. Meanwhile, the Tg values of TBO/EP elevated to some certain compared to EP. In a word, EP modified with TBO composites owned strong mech. property, higher Tg and excellent flame retardance, indicating great potential for application.

Polymer Degradation and Stability published new progress about Bending strength. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Name: 3,5-Diamino-1,2,4-triazole.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wang, Hao published the artcileNitrogen heterocyclic/phosphaphenanthrene derivative as a reactive additive for simultaneous improvement of flame retardancy, mechanical and dielectric properties of epoxy resins, Category: isoquinoline, the main research area is nitrogen based reactive additive improve phys property epoxy resin.

Various approaches have been successfully applied to solve the flammability of epoxy resin (EP) materials, but enhanced flame retardance of EP is often along with deteriorated glass transition temperature (Tg) and mech. property. In order to prepare EP composites with good comprehensive performance, we synthesized a phosphorus-containing triazole derivative named TBO from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 3,5-diamino-triazole and salicylaldehyde, and attached it into epoxy framework. With 0.75 wt% phosphorus loading, the 0.75-TBO/EP composite had a V-0 rating and a limiting oxygen index of 33%. 1.0-TBO/EP composite also had a V-0 rating and acquired a decrease of 37.6% in peak heat release rate. In addition, the tensile strength and flexural strength of 0.75-TBO/EP increased to 63.9 MPa and 146 MPa from 59 MPa and 134 MPa of EP resp. Meanwhile, the Tg values of TBO/EP elevated to some certain compared to EP. In a word, EP modified with TBO composites owned strong mech. property, higher Tg and excellent flame retardance, indicating great potential for application.

Polymer Degradation and Stability published new progress about Bending strength. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Farand, Julie published the artcileDiscovery of Potent and Selective MTH1 Inhibitors for Oncology: Enabling Rapid Target (In)Validation, Synthetic Route of 598-50-5, the main research area is antitumor drug target MTH1 inhibitor preparation tetrahydro naphthyridine derivative.

We describe the discovery of three structurally differentiated potent and selective MTH1 inhibitors and their subsequent use to investigate MTH1 as an oncol. target, culminating in target (in)validation. Tetrahydronaphthyridine 5 was rapidly identified as a highly potent MTH1 inhibitor (IC50 = 0.043 nM). Cocrystn. of 5 with MTH1 revealed the ligand in a Φ-cis-N-(pyridin-2-yl)acetamide conformation enabling a key intramol. hydrogen bond and polar interactions with residues Gly34 and Asp120. Modification of literature compound TH287 with O- and N-linked aryl and alkyl aryl substituents led to the discovery of potent pyrimidine-2,4,6-triamine 25 (IC50 = 0.49 nM). Triazolopyridine 32 emerged as a highly selective lead compound with a suitable in vitro profile and desirable pharmacokinetic properties in rat. Elucidation of the DNA damage response, cell viability, and intracellular concentrations of oxo-NTPs (oxidized nucleoside triphosphates) as a function of MTH1 knockdown and/or small mol. inhibition was studied. Based on our findings, we were unable to provide evidence to further pursue MTH1 as an oncol. target.

ACS Medicinal Chemistry Letters published new progress about Antitumor agents. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Synthetic Route of 598-50-5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ristovski, Jovana published the artcileChitosan nanobeads loaded with Biginelli hybrids as cell-selective toxicity systems with a homogeneous distribution of the cell cycle in cancer treatment, Safety of 1-Methylurea, the main research area is Biginelli reaction homogeneous cell cycle distribution antitumor activity selectivity; cytotoxic effect chitosan nanoparticle.

Tetrahydropyrimidines are a class of azaheterocycles, also called Biginelli hybrids (obtained from the Biginelli reaction), that have attracted an enormous interest in the medicinal chem. community in recent years, due to a broad biol. activity, such as anticancer, antiviral, anti-inflammatory, antidiabetic, antituberculosis activities, etc. According to SciFinder, more than 70 000 different Biginelli-like compounds have been covered in publications. However, although the Biginelli reaction can yield a large number of compounds with a broad range of activities, none of them have been captured in a carrier. In this study, chitosan-based (Ch) nanoparticles (NPs) containing three different mols. (Biginelli hybrids) were developed and tested for the first time as simple and promising vehicles for anticancer Biginelli-based drugs. The key features of NPs, such as size, surface morphol., drug encapsulation efficiency, and in vitro release were systematically investigated. Rather weak cell selectivity of pure Biginelli hybrids (A-C) to selected cancer cell lines has improved and this has been accompanied with two-to-four times stronger cytotoxic effect of A-C loaded Ch NPs, with a triple reduction in toxicity to healthy cells (MRC-5). It has been observed that the examined NPs induce apoptosis. The cell cycle anal. has confirmed the influence of A-loaded Ch (A-Ch), B-loaded Ch (B-Ch), and C-loaded Ch (C-Ch) on the cell cycle distribution, which was homogeneously affected. This is the difference with regard to the effect of A, B, and C on the cell cycle. It has been established that the increased selectivity and antitumor activity of NPs are related to the presence of the carrier.

RSC Advances published new progress about Antitumor agents. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Safety of 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem