Tag: M.W=0-100

Research speed reading in 2021. The dynamic chemical diversity of the numerous elements, ions and molecules that constitute the basis of life provides wide challenges and opportunities for research. 41253-21-8, name is Sodium 1,2,4-triazol-1-ide belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. 41253-21-8

10.0 g of [COMPOUND 1] and 100 ml of tert-butyl acetate are loaded in a flask. The resulting suspension is kept under stirring at ambient temperature.8.30 g of N-bromosuccinimide (NBS) followed by 220 mg of catalyst azobisisobutyronitrile (AIBN) are then added. At this point, the resulting mixture is heated and kept at a temperature of 65-75C for 2-4 hours.The reaction quenching is performed by lowering first the temperature of the reaction mixture to 30-40C and then adding 50 ml of a 5% solution of sodium metabisulphite.At this point the organic rich phase is separated from thewater phase and then washed with distilled water.80 ml of dimethylformamide (DMF) are added to the rich solution, after the latter has been concentrated in a vacuum. The solution thus obtained is re-distilled to eliminate theresidual t-butylacetate solvent. 4.47 g sodium 1,2,4-triazole are added to the same solution, after the latter has been brought to a temperature of 0-25C (preferably 5-10C). The reaction mixture thus obtained is kept under stirring for 1-2 hours.The reaction is quenched by the addition of 100 ml toluene and 125 ml distilled water. After separation of the phases, the rich organic phase is treated with a. water solution HC1 0.lM.After separation of the phases, 1 g of carbon is added to the resulting organic phase and it is kept under stirring at ambient temperature.After filtering, the clarified organic phase is extractedtwice with 100 ml of HC1 2M. The rich water phase, containinghigh purity dissolved anastrozole, is lastly back-washed with toluene.Maintaining a temperature below 15C, a solution of NaOF{ at30 by weight is added to the rich acid solution in 60-90minutes until pH 1 is reached. The mixture is then left in crystallization break at 0-5C for 2 hours. A solution of NaOI-{ 0.5 M is then added until a pH of between 2.5 and 3.5 is obtained. The resulting suspension is then left in break at0-5C for a further 2 hours. A last quantity of NaOH 0.5 M solution is then added until a final pH of between 5 and 7 is reached, followed by a last break atThe product is lastly filtered, washed with distilled waterand then dried in a vacuum at a temperature of 50C.In this way 6.3-6.6 g of pharmaceutical grade anastrozole are obtained from 10 g of commercial grade ANA-3.In particular, the product has:anhydrous titre: 99.16% ÷ 101.10%; KF<0 .1%;total impurities: 0.21% ÷ 0.26% The catalyzed pathway has a lower Ea, but the net change in energy that results from the reaction is not affected by the presence of a catalyst. In my other articles, you can also check out more blogs about 41253-21-8 Reference:
Patent; CORDEN PHARMA LATINA S.P.A. CON SOCIO UNICO; ANTONINI, Alberto; OLIVIERI, Lauso; SACCHITELLI, Doralinda; WO2014/184754; (2014); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Reference of 288-36-8, New Advances in Chemical Research in 2021.In classical electrochemical theory, both the electron transfer rate and the adsorption of reactants at the electrode control the electrochemical reaction. 288-36-8, name is 1H-1,2,3-Triazole, molecular formula is C2H3N3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

1,2,3-triazole(0.7 ), 2-iodo-benzoic acid (1.0 ), cesium carbonate (2.36 g, 7.20 mmol)Trans-N, N’-dimethyl-1,2-cyclohexanediamine (0.10 g, 0.75 mmol), cuprous iodide (0.08 g, 0.40 mmo 1), N, N-dimethyl Amide (18 mL)Were successively added to a 100 mL single-necked round bottom flask and gradually warmed to 100 C for 4 hours under nitrogen protection.The reaction was quenched, cooled, diluted with tap water and extracted with ethyl acetate (200 mL X).The aqueous layer was acidified with concentrated hydrochloric acid (rhoH- = 1 ~ 2) and extracted with ethyl acetate (200 mL x 2). The combined organic layers were dried and dried over anhydrous sodium sulfate. The filtrate was evaporated under reduced pressure and purified by column chromatography. (Dichloromethane / methanol (v / v) = 30/1) gave the title compound (yellow solid, 0.511 g, 67%)

The potential utility of systematic synthetic strategy will be applicable to efficient generations of chemical libraries of compounds to find ‘hit’ molecules.Read on for other articles about 1H-1,2,3-Triazole, hurry up and to see.

Reference:
Patent; Guangdong Dongyangguang Pharmaceutical Co., Ltd.; Jin Chuanfei; Wei Dehuo; Xue Yaping; Zhang Yingjun; (44 pag.)CN106674207; (2017); A;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Synthetic Route of 288-36-8, New Advances in Chemical Research in 2021. The appropriate choice of redox mediator can avoid electrode passivation and overpotential, which strongly inhibit the efficient activation of substrates in electrolysis. 288-36-8, name is 1H-1,2,3-Triazole, molecular formula is C2H3N3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

Intermediate E: 2-(2H-l,2,3-triazol-2-yl)benzoic acid Int E Step 1 : 2-(2H-l,2,3-triazol-2-yl)benzoic acid (Int E) To a solution of 2-iodobenzoic acid (3.0 g, 12.1 mmol) in DMF was added 1,2,3-triazole (1.5 g, 21.7 mmol), Cs2C03 (7.1 g, 21.7 mmol), Cul (114 mg, 0.6 mmol), and trans-N,N’-dimethylcyclohexane- 1,2-diamine (310 mg, 2.2 mmol). After heating at 120 C for 10 min in a microwave reactor, the mixture was cooled to room temperature, diluted with EtOAc, and filtered through Celite. The filtrate was concentrated in vacuo and the crude residue was purified by silica gel chromatography (MeOH in DCM with 0.1% AcOH) to give Int E as the faster eluting isomer. 1H NMR (DMSO-d6, 500MHz) delta 13.05 (brs, 1 H), 8.12 (s, 2H), 7.81-7.52 (m, 4H).

Therefore, this conceptually novel strategy might open impressive avenues to establish green and sustainable chemistry platforms.In my other articles, you can also check out more blogs about 1H-1,2,3-Triazole.

Reference:
Patent; MERCK SHARP & DOHME CORP.; KUDUK, Scott, D.; REGER, Thomas, S.; ROECKER, Anthony, J.; WO2015/95111; (2015); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Research speed reading in 2021. Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. 61-82-5, name is 1H-1,2,4-Triazol-5-amine belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. Quality Control of 1H-1,2,4-Triazol-5-amine

General procedure: 20 mg of gamma-Fe2O3Ph-PMO-NaHSO4 was added to a roundbottomflask containing an aromatic aldehyde (1 mmol), 3-amino-1,2,4-triazole 2 (1.0 mmol), b-diketones (dimedone 3, 1,3-cyclohexadione 4 or ethyl acetoacetate 5) (1.0 mmol) and stirredunder solvent-free conditions at 100 C in certain times. Meanwhile,the progress of the reactionwas indicated by TLC (n-hexane:ethyl acetate; 7:3). With completing the reaction, 3ml ethanol waspoured and the magnetic nanocomposite was separated in thepresence of a magnetic stirring bar; the reaction mixture becameclear. The crude product was recrystallized from ethanol to give thepure product. The pure products were characterized by conventionalspectroscopic methods. Physical and spectral data for theselected compounds are represented below.

The catalyzed pathway has a lower Ea, but the net change in energy that results from the reaction is not affected by the presence of a catalyst. In my other articles, you can also check out more blogs about 61-82-5

Reference:
Article; Haghighat, Mahdieh; Shirini, Farhad; Golshekan, Mostafa; Journal of Molecular Structure; vol. 1171; (2018); p. 168 – 178;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Research speed reading in 2021. Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. 288-88-0, name is 1H-1,2,4-Triazole belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. Application In Synthesis of 1H-1,2,4-Triazole

Intermediate 71; 1-Ethyl- IH-I, 2,4-triazole; A solution of DBU (220.2 g, 1.736 moles) in THF (200 ml) was added dropwise to a mechanically stirred suspension of 1, 2,4-triazole (100 g, 1.44 moles) and ethyl iodide (318 g, 2.026 moles) in dry THF (1 L) at 0 C, over a period of 3 hrs via addition funnel. The reaction mixture was allowed to warm to RT and stirred for overnight. The reaction mixture was filtered through celite and washed with THF (2x250ml). The combined filtrates were concentrated and the residue was distilled under reduced pressure to give the product as colorless liquid. (55gm) NMR (400 MHz, CDC13, delta): 1.51(t, 3H), 4.21 (q, 4H), 7.92 (s, IH), 8.05 (s, IH).

The catalyzed pathway has a lower Ea, but the net change in energy that results from the reaction is not affected by the presence of a catalyst. In my other articles, you can also check out more blogs about 288-88-0

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; PEER MOHAMED, Shahul, Hameed; WATERSON, David; WO2010/67125; (2010); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Reference of 16681-65-5, New Advances in Chemical Research in 2021. The dynamic chemical diversity of the numerous elements, ions and molecules that constitute the basis of life provides wide challenges and opportunities for research. 16681-65-5, name is 1-Methyl-1H-1,2,3-triazole, molecular formula is C3H5N3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

intermediate 6: step a(1-methyl-1H-1,2,3-triazol-5-yl)(1-methyl-1H-imidazol-5-yl)methanolA solution of 1 -methyl- lH- l ,2,3-triazole (1 .47 g, 17.7 mmol, PCT Int. Appl. 2008098104) in 20 mL THF was cooled to -40 C in a dry-ice/acetonitrile bath. -Butyllithium (1.6 M in hexane, 10.2 mL, 16.3 mmol) was added dropwise via syringe and the mixture was stirred at -40 C for 30 minutes. A solution of 1 -methyl- 1 H-imidazole-5-carbaldehyde (1.50 g, 13.6 mmol) in 10 mL THF was then added and the mixture was stirred for 5 minutes, then was transferred to an ice/water bath. After 1 hour, the mixture was quenched by addition of saturated aqueous NPLCl, diluted with water, and extracted twice with EtOAc. The aqueous phase, which contained the title compound, was then concentrated. The residue wras purified by flash column chromatography (silica gel, gradient 3-10% MeOH-DCM) to afford the title compound as a light yellow foam.

The potential utility of systematic synthetic strategy will be applicable to efficient generations of chemical libraries of compounds to find ‘hit’ molecules.Read on for other articles about 1-Methyl-1H-1,2,3-triazole, hurry up and to see.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; BARBAY, Kent; EDWARDS, James, P.; KREUTTER, Kevin, D.; KUMMER, David, A.; MAHAROOF, Umar; NISHIMURA, Rachel; URBANSKI, Maud; VENKATESAN, Hariharan; WANG, Aihua; WOLIN, Ronald, L.; WOODS, Craig, R.; FOURIE, Anne; XUE, Xiaohua; CUMMINGS, Maxwell, D.; LEONARD, Kristi, A.; WO2015/57203; (2015); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Research speed reading in 2021. The dynamic chemical diversity of the numerous elements, ions and molecules that constitute the basis of life provides wide challenges and opportunities for research. 4923-01-7, name is 5-Methyl-4H-1,2,4-triazol-3-amine belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. Recommanded Product: 5-Methyl-4H-1,2,4-triazol-3-amine

General procedure: A solution of 21% (w/v) sodium ethoxide (9.13 mL, 24.46 mmol) in ethanol was added to a solution of 3-methyl-1H-1,2,4-triazol-5-amine (2 g, 20.39 mmol) and diethylmalonate (3.42 mL, 22.42 mmol) in Ethanol (10 mL) in a 100 mL round bottomed flask. The resulting mixture was stirred at 75 C overnight. The reaction mixture was cooled and the resulting precipitate was filtered and rinsed with EtOH. The solid was air dried to yield an off white solid (2.84g, 84%). 1H NMR (400 MHz, DEUTERIUM OXIDE) ppm 2.21 (s, 3 H) 4.87 (s, 1 H); LC/MS: MS(ES+) m/e 167 (MH+).

The catalyzed pathway has a lower Ea, but the net change in energy that results from the reaction is not affected by the presence of a catalyst. In my other articles, you can also check out more blogs about 4923-01-7

Reference:
Article; Sanchez, Robert M.; Erhard, Karl; Hardwicke, Mary Ann; Lin, Hong; McSurdy-Freed, Jeanelle; Plant, Ramona; Raha, Kaushik; Rominger, Cynthia M.; Schaber, Michael D.; Spengler, Michael D.; Moore, Michael L.; Yu, Hongyi; Luengo, Juan I.; Tedesco, Rosanna; Rivero, Ralph A.; Bioorganic and Medicinal Chemistry Letters; vol. 22; 9; (2012); p. 3198 – 3202;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Synthetic Route of 288-36-8, New Advances in Chemical Research in 2021.In classical electrochemical theory, both the electron transfer rate and the adsorption of reactants at the electrode control the electrochemical reaction. 288-36-8, name is 1H-1,2,3-Triazole, molecular formula is C2H3N3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

To 2H-1,2,3-triazole (2.0 g, 29 mmol) in DMF (145 ml) was added NaH (1.16 g, 29 mmol, 60% inmineral oil) at RT and the mixture was stirred for 1h. After cooling to 0C, 2-chloro-1-fluoro-4-nitrobenzene (4.6 g, 26.1 mmol) was added and the reaction mixture was stirred at 0C for 1.5h,then at RT for 1.5h. The mixture was quenched with water and extracted with ethyl acetate. Theorganic phase was washed with water and brine, dried over Na2SO4, filtered and concentrated.The crude product was purified by chromatography on silica gel (heptane/AcOEt: 90/10 to 50/50)to afford 2-(2-chloro-4-nitrophenyl)-2H-1,2,3-triazole.

In the meantime we’ve collected together some recent articles in this area about 288-36-8 to whet your appetite. Happy reading!

Reference:
Article; Schlapbach, Achim; Revesz, Laszlo; Pissot Soldermann, Carole; Zoller, Thomas; Regnier, Catherine H.; Bornancin, Frederic; Radimerski, Thomas; Blank, Jutta; Schuffenhauer, Ansgar; Renatus, Martin; Erbel, Paulus; Melkko, Samu; Heng, Richard; Simic, Oliver; Endres, Ralf; Wartmann, Markus; Quancard, Jean; Bioorganic and Medicinal Chemistry Letters; vol. 28; 12; (2018); p. 2153 – 2158;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Research speed reading in 2021. Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. 41253-21-8, name is Sodium 1,2,4-triazol-1-ide belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. Recommanded Product: 41253-21-8

EXAMPLE 1 A mixture of 2,2′-(5-methyl-1,3-phenylene)di(2-methylpropiononitrile), (2.26 g), N-bromosuccinimide (1.78 g), benzoyl peroxide (0.05 g) and carbon tetrachloride (50 ml) was heated under reflux for 2 h, cooled and filtered, and the filtrate was evaporated to dryness under reduced pressure. The residue was dissolved in dimethylformamide (20 ml), sodium triazole (1.8 g) was added, and the mixture was stirred at room temperature for 18 h. Water (100 ml) was added, and the mixture was extracted twice with ethyl acetate. The extracts were combined, dried and evaporated to dryness under reduced pressure, and the residue was purified by flash column chromatography, eluding with ethyl acetate, to give 2,2′-[5-(1H-1,2,4-triazol-1-ylmethyl)-1,3-phenylene]di(2-methylpropiononitrile), mp 81-82 after crystallisation from ethyl acetate/cyclohexane.

The catalyzed pathway has a lower Ea, but the net change in energy that results from the reaction is not affected by the presence of a catalyst. In my other articles, you can also check out more blogs about 41253-21-8

Reference:
Patent; Imperial Chemical Industries plc; US4935437; (1990); A;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Application of 16681-65-5, New discoveries in chemical research and development in 2021. We’ll be discussing some of the latest developments in chemical about CAS: 16681-65-5, name is 1-Methyl-1H-1,2,3-triazole, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

A 2.5 M solution of n-butyllithium in hexanes (9.60 mL, 24.0 mmol) was added dropwise to a stirring solution of 1-methyl-1H-1,2,3-triazole (2.00 g, 24.0 mmol, prepared according to PCT Int. Appl., 2008098104) in dry THF (100 mL) at -50 C. The reaction became heterogeneous and yellow during addition. After 15 min, a solution of tert-butyl 3-formylazetidine-1-carboxylate (4.45 g, 24.0 mmol) in dry THF (10 mL) was added dropwise by syringe. The reaction mixture became homogeneous and was allowed to slowly warm to 0 C. Water (10 mL) and ethyl acetate (100) mL were added. The biphasic mixture was warmed to 23 C. The mixture was partitioned between half-saturated aqueous sodium chloride solution (100 mL) and ethyl acetate (300 mL). The layers were separated. The organic layer was dried with sodium sulfate and the dried solution was filtered. Celite (14 g) was added to the filtrate and the solvents were removed by rotary evaporation to provide a free-flowing powder. The powder was loaded onto a silica gel column. Elution with ethyl acetate initially, grading to 5% methanol-ethyl acetate provided the title compound as a white foam.

The potential utility of systematic synthetic strategy will be applicable to efficient generations of chemical libraries of compounds to find ‘hit’ molecules.Read on for other articles about 1-Methyl-1H-1,2,3-triazole, hurry up and to see.

Reference:
Patent; Janssen Pharmaceutica NV; Leonard, Kristi A.; Barbay, Kent; Edwards, James P.; Kreutter, Kevin D.; Kummer, David A.; Maharoof, Umar; Nishimura, Rachel; Urbanski, Maud; Venkatesan, Hariharan; Wang, Aihua; Wolin, Ronald L.; Woods, Craig R.; Pierce, Joan; Goldberg, Steven; Fourie, Anne; Xue, Xiaohua; US2014/107094; (2014); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics