Day: November 10, 2022

Moran, Daniel B. published the artcileSynthesis of (pyridinyl)-1,2,4-triazolo[4,3-a]pyridines, Recommanded Product: 6-Bromo-3-methyl-[1,2,4]triazolo[4,3-a]pyridine, the main research area is pyridinylpyridinone chlorination; chloropyridine condensation hydrazine; hydrazinopyridine orthoformate cyclization; triazolopyridine pyridinyl.

The principal route for the synthesis of pyridinyltriazolopyridines I (R = H, Me) was based upon the intermediate 2-chloropyridines II (R1 = Cl), which were prepared by the chlorination of pyridinylpyridinones. Direct chlorination of N-oxides III with POCl3 gave chloro-substituted mixtures, whereas rearrangement of III with Ac2O followed by chlorination gave exclusively II (R1 = Cl). Condensation of II with N2H4 gave II(R1 = NHNH2), which were cyclized with RC(OEt)3 to give I.

Journal of Heterocyclic Chemistry published new progress about pyridinylpyridinone chlorination; chloropyridine condensation hydrazine; hydrazinopyridine orthoformate cyclization; triazolopyridine pyridinyl. 108281-78-3 belongs to class triazoles, name is 6-Bromo-3-methyl-[1,2,4]triazolo[4,3-a]pyridine, and the molecular formula is C7H6BrN3, Recommanded Product: 6-Bromo-3-methyl-[1,2,4]triazolo[4,3-a]pyridine.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Artico, M. published the artcileAromatic hydrazides as specific inhibitors of bovine serum amine oxidase, Quality Control of 143426-50-0, the main research area is aromatic hydrazide preparation amine oxidase inhibitor; structure activity hydrazide oxidase inhibitor.

New hydrazides were synthesized in search for specific inhibitors of bovine serum amine oxidase: a series of benzoic and phenylacetic acid hydrazides containing the 1H-imidazol-1-yl or the 1H-imidazol-1-ylmethyl group as as o-, m-, or p-substituent in the Ph ring; an analogous series of p-substituted phenylhydrazides with a 5 or 6-membered heterocyclic ring substituent, and a series of similar phenylpropionic hydrazides. The longer and more flexible phenylacetic hydrazides, and to a somewhat lesser extent the phenylpropionic ones, were better specific inhibitors of bovine serum amine oxidase than the benzoic hydrazides, which were also bound by the enzyme with high affinity, but at a slow rate. Derivatives with p- and m-substituents were more reactive than the o-substituted ones. The chem. nature of the substituent was less important than its position in the Ph ring and the presence of methylene spacers. These data point to the presence of a hydrophobic site at short distance from the protein carbonyl cofactor, so that simultaneous interaction of the 2 ends of the inhibitor mol. can occur at the 2 sites. The presence of the hydrophobic site was confirmed by the capability of some mols. deprived of the hydrazidic group to act as mild inhibitors. All hydrazides were less reactive by 2-3 orders of magnitude towards pig kidney diamine oxidase and FAD-dependent monoamine oxidase from rat brain mitochondria, while the other compounds showed similar inhibition power against all proteins. The specificity for the bovine enzyme seems therefore to be related to the concerted action of the 2 moieties of the inhibitor mol.

European Journal of Medicinal Chemistry published new progress about aromatic hydrazide preparation amine oxidase inhibitor; structure activity hydrazide oxidase inhibitor. 143426-50-0 belongs to class triazoles, name is 4-(1,2,4-Triazol-1-yl)benzyl Alcohol, and the molecular formula is C9H9N3O, Quality Control of 143426-50-0.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Ye, Chengfeng published the artcileEnergetic salts of azotetrazolate, iminobis(5-tetrazolate) and 5,5′-bis(tetrazolate), COA of Formula: C3H7IN4, the main research area is azotetrazolate iminobistetrazolate bistetrazolate energetic salt; imidazolium triazolium azotetrazolate energetic salt.

Energetic ionic salts of azotetrazolate (AT), iminobis(5-tetrazolate) (IBT) and 5, 5′-bis(tetrazole) (BT) were synthesized. Ionic salts of AT and BT exhibit high heats of formation, compared with IBT salts, and the IBT salt shows a markedly different thermal behavior upon microwave heating, compared with AT and BT salts. 1-Methyl-4-aminotriazolium azotetrazolate has a layered structure and exhibits a heat of formation of +4360 kJ/kg.

Chemical Communications (Cambridge, United Kingdom) published new progress about Density. 39602-93-2 belongs to class triazoles, name is 4-Amino-1-methyl-4H-1,2,4-triazol-1-ium iodide, and the molecular formula is C3H7IN4, COA of Formula: C3H7IN4.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Tamura, Yasumitsu published the artcileReactions of 1-methyl-1H-1,2,4-triazolium 4-imine and 4-acylimines with acetylenic esters, COA of Formula: C3H7IN4, the main research area is triazolium imine acylation; triazoleacetate carboxamidomethylene; carboxamidomethylenetriazoleacetate.

Reaction of the triazolium iodide I with MeO2CCCCO2Me or MeO2CCCH in the presence of alkali followed by heating with H2O gave Me 1H-pyrazole-4-carboxylates in low yields; reaction of 4-acylimino-1-methyl-1H-1,2,4-triazolium betaines II (R = Ph,Me,OEt) with MeO2CCCH gave the 1-methyl-1H-1,2,4-triazole III.

Chemical & Pharmaceutical Bulletin published new progress about Acylation. 39602-93-2 belongs to class triazoles, name is 4-Amino-1-methyl-4H-1,2,4-triazol-1-ium iodide, and the molecular formula is C3H7IN4, COA of Formula: C3H7IN4.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Okabe, Takayuki published the artcileSyntheses of triazolopyrimidine derivatives from amitrole and their biological activity, Quality Control of 24415-66-5, the main research area is triazolopyrimidine synthesis amitrole fungicide; herbicide triazolopyrimidine synthesis amitrole.

Amitrole (3-amino-1,2,4-triazole) (I) [61-82-5] was condensed with active methylene ketones such as Et cyanoacetate, acetylacetone, ethyl acetoacetate to give the corresponding 7-amino-5-hydroxy-s-triazolo[1,5-a]pyrimidine [35186-69-7], 5,7-dimethyl-s-triazolo[1,5-a]pyrimidine [7681-99-4], and 7-hydroxy-5-methyl-s-triazolo[1,5-a]pyrimidine (II) [2503-56-2]; from II some 5-methyl-7-substituted-s-triazolopyrimidines were synthesized and tested for herbicidal and fungicidal activity. 7-Chloro-5-methyl-s-triazolo[1,5-a]pyrimidine (III) [24415-66-5] synthesized from II plus POCl3, as well as 5-methyl-7-thiocyano-s-triazolo[1,5-a]pyrimidine (IV) [35186-71-1] prepared from III plus NH4SCN actively inhibited spore germination of Ophiobolus miyabeanus. IV showed antibiotic effects on Bacillus subtilis, Pellicularia filamentosa, [Rhizoctonia solani], and Phytophthora infestans and was herbicidally active on Atriplex gmelini, but showed no growth regulatory activity on rice.

Gakugei Zasshi – Kyushu Daigaku Nogakubu published new progress about Fungicides. 24415-66-5 belongs to class triazoles, name is 7-Chloro-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidine, and the molecular formula is C6H5ClN4, Quality Control of 24415-66-5.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Xue, Hong published the artcileNew Energetic Salts Based on Nitrogen-Containing Heterocycles, Synthetic Route of 39602-93-2, the main research area is azidotriazole iodomethane quaternization; nitric acid azidotriazole quaternization; perchloric acid azidotriazole quaternization; azidotriazolium energetic salt preparation crystal structure formation enthalpy; imidazolium nitrate preparation energetic salt formation enthalpy thermal stability; methyltetrazolium nitrate preparation energetic salt formation enthalpy thermal stability; perchlorate tetrazolium preparation energetic salt formation enthalpy thermal stability.

New energetic salts were synthesized via the quaternization of azido or nitro derivatives of imidazole, 1,2,4-triazole, and substituted derivatives of tetrazole with nitric or perchloric acid or iodomethane followed by metathesis reaction with silver nitrate or silver perchlorate. The structures of 1,4-dimethyl-3-azido-1,2,4-triazolium nitrate (I, R = Me), 3-azido-1,2,4-triazolium nitrate (I, R = H), 1-methyl-4-amino-1,2,4-triazolium perchlorate (II, R = NH2, X = ClO4-), and 1,4-dimethyl-2-H-1,2,4-triazolium triiodide (II, R = Me, X = I3-) were confirmed by single-crystal X-ray anal. Most of the salts exhibit good thermal stabilities and low m.ps. By using constant volume combustion energies that were determined exptl. using an oxygen bomb calorimeter, the standard molar enthalpies of formation were derived based on designed Hess thermochem. cycles.

Chemistry of Materials published new progress about Explosives. 39602-93-2 belongs to class triazoles, name is 4-Amino-1-methyl-4H-1,2,4-triazol-1-ium iodide, and the molecular formula is C3H7IN4, Synthetic Route of 39602-93-2.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Hughes, Samantha J. published the artcileFragment based discovery of a novel and selective PI3 kinase inhibitor, COA of Formula: C6H5ClN4, the main research area is PI3 kinase inhibitor imidazopyridine preparation SAR.

We report the use of fragment screening and fragment based drug design to develop a PI3γ kinase fragment hit into a lead. Initial fragment hits were discovered by high concentration biochem. screening, followed by a round of virtual screening to identify addnl. ligand efficient fragments. These were developed into potent and ligand efficient lead compounds using structure guided fragment growing and merging strategies. This led to a potent, selective, and cell permeable PI3γ kinase inhibitor, 12 (I), with good metabolic stability that was useful as a preclin. tool compound

Bioorganic & Medicinal Chemistry Letters published new progress about Drug design. 24415-66-5 belongs to class triazoles, name is 7-Chloro-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidine, and the molecular formula is C6H5ClN4, COA of Formula: C6H5ClN4.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Ye, Chengfeng published the artcileSynthesis and thermochemical properties of NF2-containing energetic salts, Computed Properties of 39602-93-2, the main research area is difluoroamine tetrazolate salt explosive thermochem property; heat formation difluoroamine tetraazolate explosive salt; detonation property difluoroamine tetraazolate explosive salt.

Ammonium, 1,5-diamino-4-methyl-tetrazolium and 4-amino-1-methyl-triazolium salts of 5-difluoroaminodifluoromethyl-tetrazolate (TA-CF2NF2) were prepared by metathesis reactions of silver 5-difluoroaminodifluoromethyl-tetrazolate and the corresponding iodides. All are thermally stable to ∼150°. The ammonium salt has a d. of 1.88 g/cm-3. The combination of the CBS-4 method and isodesmic bond separation reactions was an economical and reliable method to estimate heats of formation for polyfluorinated mols. The standard heats of formation (ΔfH0298) of ammonium 5-difluoroaminodifluoromethyl-tetrazolate was calculated to be -53.13 kcal/mol-1 using the CBS-4 method. While its detonation pressures (P) and velocities (D) were estimated using Cheetah 4.0: P = 28.78 GPa; D = 8490 m/s-1; detonation properties for 1,5-diamino-4-methyl-tetrazolium salts of 5-difluoroaminomethyltetrazolate (TA-CH2NF2), 5-difluoroaminotetrazolate (TA-NF2) and 5-difluoroaminodinitromethyl-tetrazolate (TA-C(NO2)2NF2) are also compared based on predicted densities and computed heats of formation.

Journal of Fluorine Chemistry published new progress about Cyclization. 39602-93-2 belongs to class triazoles, name is 4-Amino-1-methyl-4H-1,2,4-triazol-1-ium iodide, and the molecular formula is C3H7IN4, Computed Properties of 39602-93-2.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Laus, Gerhard published the artcileSynthesis and crystal structures of new 1,4-disubstituted 1,2,4-triazoline-5-thiones, Recommanded Product: 4-Amino-1-methyl-4H-1,2,4-triazol-1-ium iodide, the main research area is triazolinothione preparation crystal structure.

The simple synthesis of sulfur into the 5-position of 1,4-disubstituted quaternary 1,2,4-triazolium salts by two methods was investigated. The syntheses of 1,4-disubstituted 1,2,4-triazoline-5-thiones I (R1 = CH3, NH2, N(CH3)2, OCH2C6H5; R2 = CH3, CH(CH3)2, NH2, etc.) were reported. Thermolysis of I (R1 = R2 = CH3) in air gave 1,4-dimethyl-1,2,4-triazolium hydrogen sulfate. Crystal structures of I were determined by single-crystal X-ray diffraction. Intermol. hydrogen bonds (C-H-S, C-H-N, N-H-N, N-H-S) were observed in the solid state. The solvent-dependent 1H NMR chem. shifts of signals satisfactorily correlated with the Kamlet-Abboud-Taft π* and β parameters in ten solvents. From the lack of correlation with the α parameter and from the C:S bond length (average 1.67°), a significant contribution of a mesoionic imidazolium-2-thiolate resonance structure seems unlikely.

Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences published new progress about Bond length. 39602-93-2 belongs to class triazoles, name is 4-Amino-1-methyl-4H-1,2,4-triazol-1-ium iodide, and the molecular formula is C3H7IN4, Recommanded Product: 4-Amino-1-methyl-4H-1,2,4-triazol-1-ium iodide.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Zuniga, Edison S. published the artcileThe synthesis and evaluation of triazolopyrimidines as anti-tubercular agents, Synthetic Route of 24415-66-5, the main research area is triazolo pyrimidine derivative preparation tuberculosis structure; Anti-tubercular activity; Mycobacterium tuberculosis; Triazolopyrimidines; Tuberculosis.

We identified a di-substituted triazolopyrimidine with anti-tubercular activity against Mycobacterium tuberculosis. Three segments of the scaffold were examined rationally to establish a structure-activity relationship with the goal of improving potency and maintaining good physicochem. properties. A number of compounds displayed sub-micromolar activity against Mycobacterium tuberculosis with no cytotoxicity against eukaryotic cells. Non-substituted aromatic rings at C5 and a two-carbon chain connecting a terminal aromatic at C7 were preferred features; the presence of NH at C7 and a lack of substituent at C2 were essential for potency. We identified compounds with acceptable metabolic stability in rodent and human liver microsomes. Our findings suggest that the easily-synthesized triazolopyrimidines are a promising class of potent anti-tubercular agents and warrant further investigation in our search for new drugs to fight tuberculosis.

Bioorganic & Medicinal Chemistry published new progress about Homo sapiens. 24415-66-5 belongs to class triazoles, name is 7-Chloro-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidine, and the molecular formula is C6H5ClN4, Synthetic Route of 24415-66-5.

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics