Triazoles

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I found the field of Chemistry; Electrochemistry; Instruments & Instrumentation very interesting. Saw the article Dual-signal aptamer sensor based on polydopamine-gold nanoparticles and exonuclease I for ultrasensitive malathion detection published in 2019.0. Name: 1H-1,2,4-Triazol-5-amine, Reprint Addresses Huo, DQ; Hou, CJ (corresponding author), Chongqing Univ, Key Lab Biorheol Sci & Technol, State & Local Joint Engn Lab Vasc Implants, Minist Educ,Bioengn Coll, Chongqing 400044, Peoples R China.. The CAS is 61-82-5. Through research, I have a further understanding and discovery of 1H-1,2,4-Triazol-5-amine

A highly sensitive dual-signal aptamer sensor based on polydopamine-gold nanoparticles (PDA-AuNPs) and exonuclease I (Exo I) was developed for detection of malathion. Compared with traditional sensing elements, aptamer has many advantages, such as high affinity, superior specificity, strong stability and easy modification. The electrodeposition synthesis of PDA-AuNPs gave excellent biocompatibility and electrical conductivity on the sensor. With the addition of malathion, the specific interaction between malathion and its aptamer forced the aptamer to detach from the electrode surface and induced the capture probe to form a hairpin structure on the electrode surface. Exo I was added to motivate the autocatalytic target cycling which remarkably increased the current change of electrochemical signal over 2 times. Therefore, the promising strategy gave rise to an optional dual-signal current readout in both the signal-on of Fc and the signal-off of Tn. In this work, the prepared biosensor exhibited high sensitivity to malathion via the combination of dual-signal design and autocatalytic target cycling amplification. Under the optimized conditions, the proposed sensor showed a wide linear range from 0.5 to 600 ng/L malathion. It also exhibited excellent specificity, acceptable repeatability and good stability. The application of real samples obtained satisfactory recovery results, demonstrating a promising potential in food safety analysis.

Reference:
Article; Safari, Niloufar; Shirini, Farhad; Tajik, Hassan; Journal of Molecular Structure; vol. 1201; (2020);,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

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Quality Control of 1H-1,2,4-Triazol-5-amine. About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Sakhno, YI; Murlykina, M; Zbruyev, OI; Kozyryev, AV; Shishkina, S; Sysoiev, D; Musatov, VI; Desenko, SM; Chebanov, VA or concate me.

Quality Control of 1H-1,2,4-Triazol-5-amine. Recently I am researching about HETEROCYCLIZATION REACTIONS; CYCLOCONDENSATION REACTIONS; MULTICOMPONENT REACTION; BIGINELLI REACTION; PYRUVIC ACIDS; AMINOAZOLES; 3-AMINO-1,2,4-TRIAZOLE; TETRAHYDROPYRIMIDINES; 5-AMINOPYRAZOLES; ALDEHYDES, Saw an article supported by the National Academy of Sciences of Ukraine [0119U100727, 0119U100716, 0118U100275]. Published in BEILSTEIN-INSTITUT in FRANKFURT AM MAIN ,Authors: Sakhno, YI; Murlykina, M; Zbruyev, OI; Kozyryev, AV; Shishkina, S; Sysoiev, D; Musatov, VI; Desenko, SM; Chebanov, VA. The CAS is 61-82-5. Through research, I have a further understanding and discovery of 1H-1,2,4-Triazol-5-amine

Four-component reactions of 3-amino-1,2,4-triazole or 5-amino-1H-pyrazole-4-carbonitrile with aromatic aldehydes and pyruvic acid or its esters under ultrasonication were studied. Unusual for such a reaction type, a cascade of elementary stages led to the formation of 7-azolylaminotetrahydroazolo[1,5-a]pyrimidines.

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Product Details of 61-82-5. About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Liang, S; Wu, XL; Zong, MH; Lou, WY or concate me.

Liang, S; Wu, XL; Zong, MH; Lou, WY in [Liang, Shan; Wu, Xiao-Ling; Zong, Min-Hua; Lou, Wen-Yong] South China Univ Technol, Sch Food Sci & Engn, Lab Appl Biocatalysis, Guangzhou 510640, Peoples R China; [Lou, Wen-Yong] South China Univ Technol, Guangdong Prov Key Lab Green Proc Nat Prod & Prod, Guangzhou 510640, Peoples R China published Zn-triazole coordination polymers: Bioinspired carbonic anhydrase mimics for hydration and sequestration of CO2 in 2020.0, Cited 58.0. Product Details of 61-82-5. The Name is 1H-1,2,4-Triazol-5-amine. Through research, I have a further understanding and discovery of 61-82-5.

Artificial enzyme mimics have recently emerged as alternative biocatalysts for overcoming the intrinsic fragility of natural enzyme in practical applications. However, current researches regarding mimetic enzymes are still confined to very few reaction types, with artificial oxidoreductases as dominance. Herein, inspired by nature, we designed and fabricated a range of Zn-Triazole coordination polymers (ZnTazs) that presented similar co-ordination structures with the active site of natural carbonic anhydrase. (CA II). These synthesized compounds exhibited inherently mimetic function with natural CA for catalyzing the hydrolysis of p-nitrophenyl acetate (p-NPA). Especially, the initial hydrolysis rate (V-0) of p-NPA catalyzed by ZnTaz-1 (Zn-5(bta)(6)(NO3)(4) center dot H2O) and ZnTaz-2 (Zn-3(OH)(2)(btca)(2) center dot DMF center dot 4 H2O) reached 42.1 and 73.8 nM.s(-1), respectively. Meanwhile, ZnTaz-1 and ZnTaz-2 showed favorable recyclability, and excellent stability towards various pH values and organic solvents, which are of great significance for practical employment. Moreover, they could also promote the efficient hydration and sequestration of greenhouse gas CO2 in aqueous medium. Based on this work, we aim to provide more theoretical and practical basis for rational design of CA mimics from the inspiration of natural enzyme, as well as propose a potential strategy for tackling the CO2 crisis.

Product Details of 61-82-5. About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Liang, S; Wu, XL; Zong, MH; Lou, WY or concate me.

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About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Ma, B; Wang, X; Lu, SY; He, HW; Ma, M; Shi, YQ; Chen, S or concate me.. Name: 1H-1,2,4-Triazol-5-amine

An article A novel double agent of triazole-based zinc-containing complex which constituted Zn/Zn stabilizer system with zinc stearate as thermal stabilizer for poly(vinyl chloride) WOS:000491303600025 published article about MECHANISM; EFFICIENCY; PENTAERYTHRITOL; INHIBITION; FUSION in [Ma, Biao; Wang, Xu; Lu, Songyan; He, Huiwen; Ma, Meng; Shi, Yanqin; Chen, Si] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Zhejiang, Peoples R China in 2019.0, Cited 30.0. Name: 1H-1,2,4-Triazol-5-amine. The Name is 1H-1,2,4-Triazol-5-amine. Through research, I have a further understanding and discovery of 61-82-5

An effectively Zn/Zn stabilizer system instead of traditional Ca/Zn stabilizer system was put forward, which contained a new triazole-based zinc-containing complex (abbreviated as [Zn(ttr)(St)]) and Zinc stearate (ZnSt(2)). Without Ca soap in the system, [Zn(ttr)(St)] itself could effectively absorb HCl and provided PVC with higher transparency and better thermal stability without zinc burning than commercial CaSt(2)/ZnSt(2) stabilizer system, verified by Congo red tests and discoloration tests and dynamic thermal stability analysis. In addition, [Zn(ttr)(St)] could further delay zinc burning of other zinc soaps, constituting Zn/Zn stabilizer system. This is attributed to the strong ability of restricting ZnCl2 of 3-amino-1,2,4-triazole released from [Zn(ttr)(St)] after absorbing HCl. After adding ESBO, PVC stabilized by [Zn(ttr)(St)]/ZnSt(2)/ESBO showed excellent transparency and thermal stability. We believe that [Zn(ttr)(St)] can act as a novel double agent with the stabilization effects of zinc soap and calcium soap at the same time and this Zn/Zn stabilizer system may inaugurate a new stabilizer system for PVC with synergistic effect. (C) 2019 Elsevier Ltd. All rights reserved.

About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Ma, B; Wang, X; Lu, SY; He, HW; Ma, M; Shi, YQ; Chen, S or concate me.. Name: 1H-1,2,4-Triazol-5-amine

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About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Maza, S; Kijatkin, C; Bouhidel, Z; Pillet, S; Schaniel, D; Imlau, M; Guillot, B; Cherouana, A; Bendeif, EE or concate me.. Recommanded Product: 61-82-5

Maza, S; Kijatkin, C; Bouhidel, Z; Pillet, S; Schaniel, D; Imlau, M; Guillot, B; Cherouana, A; Bendeif, EE in [Maza, Soumeya; Bouhidel, Zakaria; Cherouana, Aoutef] Univ Freres Mentouri Constantine 1, Dept Chim, Unite Rech Chim Environm & Mol Struct CHEMS, Constantine 25000, Algeria; [Maza, Soumeya; Pillet, Sebastien; Schaniel, Dominik; Guillot, Benoit; Bendeif, El-Eulmi] Univ Lorraine, CRM2, CNRS, Nancy, France; [Kijatkin, Christian; Imlau, Mirco] Osnabruck Univ, Sch Phys, D-49076 Osnabruck, Germany; [Kijatkin, Christian; Imlau, Mirco] Osnabruck Univ, Res Ctr Cellular Nanoanalyt, CellNanOs, D-49076 Osnabruck, Germany published Synthesis, structural investigation and NLO properties of three 1,2,4-triazole Schiff bases in 2020.0, Cited 60.0. Recommanded Product: 61-82-5. The Name is 1H-1,2,4-Triazol-5-amine. Through research, I have a further understanding and discovery of 61-82-5.

We report in this work the synthesis, crystal structures analyses, and nonlinear-optical (NLO) properties of three Schiff bases with halogens and triazole moieties: (E)-1-(4-bromophenyl)-N-(1H-1,2,4-triazol-3yl)methanimine L1, (E)-1-(4-bromophenyl)-N-(4H-1,2,4-triazol-3-yl)methanimine L2, and (E)-1-(4chlorophenyl)-N-(4H-1,2,4-triazol-3-yl)methanimine L3. The three molecules are built on the basis of the same backbone formed by two aromatic rings (phenyl and triazole) linked by imine bridge. The two first compounds L1 and L2 contain tautomers of the Schiff base, where a phenyl ring is substituted by a bromine atom. The third one, L3, is similar to L2 but contains a chlorine atom instead of bromine. In crystals formed by these three Schiff bases the three dimensional networks are formed by supramolecular interactions such as hydrogen bonds, C-X…pi and X…X (X = Cl or Br) contacts. Complementary Hirshfeld surface analyses were carried out to investigate and quantify the contributions of the different intermolecular interactions within the supramolecular assemblies. These analyses reveal that the main contributions in the studied compounds are provided by the H center dot center dot center dot H and N center dot center dot center dot H interactions that represent-53% (for L1),-49% (for L2) and-50% (for L3) of the total contributions to the Hirshfeld surface. The nonlinear optical properties are investigated by nonlinear diffuse femtosecond-pulse reflectometry and are compared with those of the reference material LiNbO3, in particular regarding the temporal evolution. (C) 2020 Elsevier B.V. All rights reserved.

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Computed Properties of C2H4N4. About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Si, ZY; Hou, Z; Vikhe, YS; Thappeta, KRV; Marimuthu, K; De, PP; Ng, OT; Li, P; Zhu, YB; Pethe, K; Chan-Park, MB or concate me.

An article Antimicrobial Effect of a Novel Chitosan Derivative and Its Synergistic Effect with Antibiotics WOS:000612551400104 published article about CHEMICAL-MODIFICATIONS; EFFLUX PUMPS; NANOPARTICLES; RESISTANCE; MODE; GENERATION; BACTERIA; DELIVERY; MICRO in [Si, Zhangyong; Hou, Zheng; Vikhe, Yogesh Shankar; Thappeta, Kishore Reddy Venkata; Chan-Park, Mary B.] Nanyang Technol Univ NTU, Sch Chem & Biomed Engn, Singapore 637459, Singapore; [Si, Zhangyong; Hou, Zheng; Vikhe, Yogesh Shankar; Thappeta, Kishore Reddy Venkata; Chan-Park, Mary B.] Nanyang Technol Univ, Ctr Antimicrobial Bioengn, Singapore 637459, Singapore; [Thappeta, Kishore Reddy Venkata] Nanyang Technol Univ, Singapore Ctr Environm & Life Sci SCELSE, Singapore 637551, Singapore; [Marimuthu, Kalisvar; Ng, Oon Tek] Tan Tock Seng Hosp, Dept Infect Dis, Singapore 308442, Singapore; [Marimuthu, Kalisvar; Ng, Oon Tek] Natl Ctr Infect Dis, Singapore 637459, Singapore; [De, Partha Pratim] Tan Tock Seng Hosp, Dept Lab Med, Singapore 308433, Singapore; [Ng, Oon Tek; Pethe, Kevin] Nanyang Technol Univ, Lee Kong Chian Sch Med, Singapore 636921, Singapore; [Li, Peng] Northwestern Polytech Univ, Inst Flexible Elect, Xian 710072, Peoples R China; [Zhu, Yabin] Ningbo Univ, Med Sch, Ningbo 315211, Zhejiang, Peoples R China; [Pethe, Kevin] Nanyang Technol Univ, Sch Biol Sci, Singapore 636921, Singapore; [Chan-Park, Mary B.] Nanyang Technol Univ, Lee Kong Chian Sch Med, Singapore 637459, Singapore; [Chan-Park, Mary B.] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637459, Singapore in 2021.0, Cited 49.0. Computed Properties of C2H4N4. The Name is 1H-1,2,4-Triazol-5-amine. Through research, I have a further understanding and discovery of 61-82-5

Cationic polymers are promising antibacterial agents because bacteria have a low propensity to develop resistance against them, but they usually have low biocompatibility because of their hydrophobic moieties. Herein, we report a new biodegradable and biocompatible chitosan-derived cationic antibacterial polymer, 2,6-diamino chitosan (2,6-DAC). 2,6-DAC shows excellent broad-spectrum antimicrobial activity with minimum inhibitory concentrations (MICs) of 8-32 mu g/mL against clinically relevant and multidrug-resistant (MDR) bacteria including Listeria monocytogenes, Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Acinetobacter baumannii. Furthermore, 2,6-DAC shows an excellent synergistic effect with various clinically relevant antibiotics proved by decreasing the MICs of the ntibiotics against MDR A. baumannii and methicillin-resistant Staphylococcus aureus to <1 mu g/mL. In vivo biocompatibility of 2,6-DAC is proved by a dosage of 100 mg/kg compound via oral administration and 25 mg/kg compound via intraperitoneal injection to mice; 2,6-DAC does not cause any weight loss and any significant change in liver and kidney biomarkers or the important blood electrolytes. The combinations of 2,6-DAC together with novobiocin and rifampicin show >2.4 log(10) reduction of A. baumannii in murine intraperitoneal and lung infection models. The novel chitosan derivative, 2,6-DAC, can be utilized as a biocompatible broad-spectrum cationic antimicrobial agent alone or in synergistic combination with various antibiotics.

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Quality Control of 1H-1,2,4-Triazol-5-amine. About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Zhang, JJ; Sun, XQ; Chen, Y; Mi, YQ; Tan, WQ; Miao, Q; Li, Q; Dong, F; Guo, ZY or concate me.

Quality Control of 1H-1,2,4-Triazol-5-amine. I found the field of Chemistry; Polymer Science very interesting. Saw the article Preparation of 2,6-diurea-chitosan oligosaccharide derivatives for efficient antifungal and antioxidant activities published in 2020.0, Reprint Addresses Guo, ZY (corresponding author), Chinese Acad Sci, Key Lab Coastal Biol & Bioresource Utilizat, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China.. The CAS is 61-82-5. Through research, I have a further understanding and discovery of 1H-1,2,4-Triazol-5-amine.

In this study, 2-urea-chitosan oligosaccharide derivatives (2-urea-COS derivatives) and 2,6-diurea-chitosan oligosaccharide derivatives (2,6-diurea-COS derivatives) were successfully designed and synthesized via intermediate 2-methoxyformylated chitosan oligosaccharide. All samples were characterized and compared based on FT-IR, H-1 NMR spectroscopy, and elemental analysis. The antifungal effects of COS derivatives were tested against Fusarium oxysporum f. sp. niveum, Phomopsis asparagus, and Botrytis cinereal. Their antioxidant properties, including superoxide radicals’ scavenging activity, hydroxyl radicals’ scavenging activity, and DPPH radicals’ scavenging activity were also explored within different concentrations. COS derivatives bearing urea groups showed improved bioactivity compared with pristine COS and 2,6-diurea-COS derivatives had a higher biological activity than 2-urea-COS derivatives in tested concentrations. Additionally, L929 cells were used to carry out cytotoxicity test of COS and COS derivatives by CCK-8 assay. The results indicated that some of samples showed low cytotoxicity. These findings offered a suggestion that COS derivatives bearing urea groups are promising biological materials.

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About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Galimberti, F; Moretto, A; Papa, E or concate me.. Safety of 1H-1,2,4-Triazol-5-amine

Authors Galimberti, F; Moretto, A; Papa, E in PERGAMON-ELSEVIER SCIENCE LTD published article about DIFFERENT VALIDATION CRITERIA; REAL EXTERNAL PREDICTIVITY; CORRELATION-COEFFICIENT; IDENTIFICATION; ALTERNATIVES; EVALUATE; HAZARD in [Galimberti, Francesco; Moretto, Angelo] ASST Fatebenefratelli Sacco, Int Ctr Pesticides & Hlth Risk Prevent, ICPS, Milan, Italy; [Moretto, Angelo] Univ Milan, Dept Biomed & Clin Sci, Milan, Italy; [Papa, Ester] Univ Insubria, QSAR Res Unit Environm Chem & Ecotoxicol, Varese, Italy in 2020.0, Cited 45.0. Safety of 1H-1,2,4-Triazol-5-amine. The Name is 1H-1,2,4-Triazol-5-amine. Through research, I have a further understanding and discovery of 61-82-5

The EFSA ‘Guidance on tiered risk assessment for edge-of-field surface waters’ underscores the importance of in silico models to support the pesticide risk assessment. The aim of this work was to use in silico models starting from an available, structured and harmonized pesticide dataset that was developed for different purposes, in order to stimulate the use of QSAR models for risk assessment. The present work focuses on the development of a set of in silico models, developed to predict the aquatic toxicity of heterogeneous pesticides with incomplete/unknown toxic behavior in the water compartment. The generated models have good fitting performances (R-2 : 0.75-0.99), they are internally robust (Q(2) loo: 0.66-0.98) and can handle up to 30% of perturbation of the training set (Q(2) Imo: 0.64-0.98). The absence of chance correlation was guaranteed by low values of R-2 calculated on scrambled responses (R-2 Y-scr: 0.11-0.38). Different statistical parameters were used to quantify the external predictivity of the models (CCCext: 0.73-0.91, Q(2) ext-Fn: 0.53-0.96). The results indicate that all the best models are predictive when applied to chemicals not involved in the models development. In addition, all models have similar accuracy both in fitting and in prediction and this represents a good degree of generalization. These models may be useful to support the risk assessment procedure when experimental data for key species are missing or to create prioritization lists for the general a priori assessment of the potential toxicity of existing and new pesticides which fall in the applicability domain. (C) 2020 Elsevier Ltd. All rights reserved.

About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Galimberti, F; Moretto, A; Papa, E or concate me.. Safety of 1H-1,2,4-Triazol-5-amine

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About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Xie, SF; Huang, LQ; Zhong, L; Lai, BL; Yang, M; Chen, WB; Zhang, YQ; Dong, W or concate me.. Computed Properties of C2H4N4

An article Structures, Single-Molecule Magnets, and Fluorescent Properties of Four Dinuclear Lanthanide Complexes Based on 4-Azotriazolyl-3-hydroxy-2-naphthoic Acid WOS:000467351100062 published article about METAL-ORGANIC FRAMEWORKS; ION; ANISOTROPY; MAGNETIZATION; EXCHANGE; AXIALITY; BLOCKING; BEHAVIOR in [Xie, Shang-Fang; Huang, Li-Qian; Zhong, Li; Lai, Bi-Lin; Yang, Meng; Chen, Wen-Bin; Dong, Wen] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou Key Lab Environm Funct Mat & Technol, Guangzhou 510006, Guangdong, Peoples R China; [Zhang, Yi-Quan] Nanjing Normal Univ, Sch Phys Sci & Technol, Jiangsu Key Lab NSLSCS, Nanjing 210023, Jiangsu, Peoples R China in 2019.0, Cited 67.0. The Name is 1H-1,2,4-Triazol-5-amine. Through research, I have a further understanding and discovery of 61-82-5. Computed Properties of C2H4N4

Four isostructural dinuclear lanthanide complexes based on 4-azotriazolyl-3-hydroxy-2-naphthoic acid (H(3)ATNA) and 3-hydroxy-2-naphthoic acid (H(2)NA) ligands, {[Ln(2)(HATNA)(2)(HNA)(2)(H2O)(4)].6DMF} (Ln = Dy (1), Tb (2), Sm (3), Eu (4); DMF = N,N-dimethylformamide) have been prepared and characterized by X-ray diffraction crystallography, dc/ac magnetic characterization, and fluorescent spectrometry. The crystallographic data reveal dinuclear lanthanide cores of complexes 1-4, bridged by phenoxo and mu(1,3) carboxyl groups. Each nine-coordinated Ln(III) ion is located in a slightly distorted monocapped square antiprism. The ligand of H(3)ATNA displays a unique antenna effect in complex 4. Complexes 1-3 display only two ligand-centered fluorescent emissive peaks around 450 and 600 nm, and complex 4 shows four characteristic Eu(III)centered emission bands at 593, 618, 653, and 698 nm under excitation at 348 nm. Complex 1 exhibits single-molecule magnet behavior that is rationalized through ab initio calculations.

About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Xie, SF; Huang, LQ; Zhong, L; Lai, BL; Yang, M; Chen, WB; Zhang, YQ; Dong, W or concate me.. Computed Properties of C2H4N4

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Formula: C2H4N4. About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Tkachenko, IG; Komykhov, SA; Gladkov, ES; Musatov, VI; Chebanov, VA; Desenko, SM or concate me.

Formula: C2H4N4. Authors Tkachenko, IG; Komykhov, SA; Gladkov, ES; Musatov, VI; Chebanov, VA; Desenko, SM in SPRINGER published article about in [Tkachenko, Irina G.; Komykhov, Sergey A.; Gladkov, Eugene S.; Musatov, Vladimir I.; Chebanov, Valentyn A.; Desenko, Sergey M.] Natl Acad Sci Ukraine, Inst Single Crystals, State Sci Inst, 60 Nauky Ave, UA-61072 Kharkov, Ukraine; [Tkachenko, Irina G.; Komykhov, Sergey A.; Gladkov, Eugene S.; Chebanov, Valentyn A.; Desenko, Sergey M.] Kharkov Natl Univ, 4 Svobody Sq, UA-61022 Kharkov, Ukraine; [Tkachenko, Irina G.] Minist Internal Affairs Ukraine, Kharkiv Forens Sci Ctr, 32 Kovtuna St, UA-61036 Kharkov, Ukraine in 2019.0, Cited 22.0. The Name is 1H-1,2,4-Triazol-5-amine. Through research, I have a further understanding and discovery of 61-82-5

Three-component reaction of 3-amino-1H-1,2,4-triazole or 5-amino-2H-1,2,3-triazole derivatives, acetaldehyde, and 1,3-dicarbonyl compounds (acetylacetone or -keto esters) in water under microwave irradiation leads to regioselective formation of 4,7-dihydro[1,2,4]-triazolo- and 4,7-dihydro[1,2,3]triazolo[1,5-a]pyrimidines. Using ethyl 4,4,4-trifluoro-3-oxobutanoate as 1,3-dicarbonyl compound under the same conditions allows to obtain the corresponding 5-hydroxy-4,5,6,7-tetrahydro derivatives, which fail to dehydrate in the reaction medium.

Formula: C2H4N4. About 1H-1,2,4-Triazol-5-amine, If you have any questions, you can contact Tkachenko, IG; Komykhov, SA; Gladkov, ES; Musatov, VI; Chebanov, VA; Desenko, SM or concate me.