Category: Triazoles

Related Products of 16681-70-2, New Advances in Chemical Research in 2021. Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. 16681-70-2, name is 1H-[1,2,3]Triazole-4-carboxylic acid, molecular formula is C3H3N3O2, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

H. (2S,4S)-5-Biphenyl-4-yl-2-hydroxymethyl-4-[(3H-[1,2,3]-triazole-4-carbonyl)-amino]-pentanoic acid 2-methanesulfonyl-ethyl ester (R7=-(CH2)2SO2CH3) (2S,4S)-5-Biphenyl-4-yl-4-t-butoxycarbonylamino-2-hydroxymethyl-pentanoic acid (100 mg, 250 mumol, 1.0 eq.), HOBt (0.1 g, 750 mumol, 3.0 eq.), and EDCI (130 muL, 3.0 eq.) were dissolved in DCM (2 mL). After stirring for 10 minutes, 2-(methylsulfonyl)-ethanol (250 mg, 2.0 mmol, 8.0 eq.) and 4-methylmorpholine (110 muL, 4.0 eq.) were added. The resulting mixture was stirred at room temperature for 1.5 hours. The reaction was quenched with water. The DCM layer was separated, concentrated, and the product purified by flash chromatography (70-100% EtOAc/hexanes over 15 minutes). The clean fractions were combined and concentrated. MeCN (2.5 mL) and 4 M of HCl in dioxane (250 muL, 4.0 eq.) were added and the resulting mixture was stirred at room temperature for 1 hour. The solvent was removed to provide the intermediate HCl salt, which was used in the following coupling step. 1,2,3-Triazole-4-carboxylic acid (28.3 mg, 250 mumol, 1.0 eq.) and HATU (95.2 mg, 250 mumol, 1.0 eq.) were dissolved in DMF (2.0 mL) and the resulting solution was stirred for 5 minutes, followed by the addition of DIPEA (131 muL) and the intermediate HCl salt. After 5 minutes, the reaction was quenched with water and the product purified by preparative HPLC to yield the title compound (64 mg; purity 95%). MS m/z [M+H]+ calc’d for C24H28N4O6S, 501.17. found 501.4.

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-4-carboxylic acid, hurry up and to see.

Reference:
Patent; THERAVANCE, INC.; US2012/213806; (2012); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

New discoveries in chemical research and development in 2021. The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry. 1157938-97-0, name is 1-(2,5-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. HPLC of Formula: C10H7F2N3O

Propionitrile (11 g, 0.200 mmol) was dissolved in 100 mL of anhydrous THF.Replace with nitrogen three times and slowly add at -78CBistrimethylsilyllithium200 mL (1M) of tetrahydrofuran solution, stir for 10 min, then add magnesium bromide (46 g, 0.25 mmol),After stirring for 20 min, 1-(2,5-difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanone (22.3 g, 0.100 mmol) was added and slowly raised. To -50 C, then the solution is stirred for 2 hours,Until the disappearance of the raw material, 100 mL saturated ammonium chloride solution and 150 mL ethyl acetate were added.Extract twice, combine the organic phases, and wash three times with saturated saline solution.The organic phase was dried, spin-dried and passed through a column of silica gel (PE:EA=1:2) according to formula (I)23.6 g (yield: 84.9%, d.e. >99%) of de(2S,3R) and (2R,3S) white solids were mixed.The resulting solid was dissolved in 50 ml toluene, 100 ml methyl tert-butyl ether andIn a mixed solvent of 20 mL of methanol, D-10-camphorsulfonic acid (19.7 g, 84.91 mmol) was added.Heat the reaction to 60 C, react for 1h, slowly cool and cool, filter,Obtain a white solid, then add water, stir with sodium bicarbonate, extract with dichloromethane,The organic phase was concentrated to obtain the diastereoisomer of (2S,3R) 8.49 g according to formula (I)(Yield: 35.9%, e.e. >99%, d.e. >99%) LC-MS of the resulting compoundThe result of H-NMR measurement is the same as that described in Example 2.

If you are hungry for even more, make sure to check my other article about 1157938-97-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Liu Meijun; (18 pag.)CN106317044; (2017); A;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Synthetic Route of 15294-81-2, New Advances in Chemical Research in 2021. As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 15294-81-2, name is 4,5-Dibromo-1H-1,2,3-triazole, molecular formula is C2HBr2N3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

Example 121: Preparation of 4,5-dibromo-l-methyl-lH-[l,2,3″|triazole and 4,5-dibromo- 2-methyl-2H-[l .2.31triazole(A) (B) To a solution of 4,5-dibromo- IH-[1, 2,3]triazole (2.26 g, 10 mmol) (Example 120) and triethyl amine (1.5 ml, 10 mmol) in dichloromethane (50 ml), was added methyl iodide (625 mul, 10 mmol). The reaction mixture was stirred at room temperature for 24 hours. More triethyl amine (0.75 ml, 5 mmol) and more methyl iodide (312 mul, 5 mmol) were added and the mixture was stirred for 3 hours. The reaction mixture was quenched by addition of aqueous ammonium chloride (saturated) (15 ml). The phases were separated and the organic phase was dried over magnesium sulfate and concentrated. The residue was purified by column chromatography on silica gel (eluent: 10-30percent ethyl acetate in hexane) to give 4,5-dibromo-2-methyl-2H-[l,2,3]triazole (isomer B) (625 mg, 26percent yield) and 4,5-dibromo- 1 -methyl- IH-[1, 2,3]triazole (isomer A) (825 mg, 34percent yield).Isomer A 1H-NMR (400 MHz, CDCl3): 4.09 (s, 3H, Me) ppm. Isomer B 1H-NMR (400 MHz, CDCl3): 4.18 (s, 3H, Me) ppm.

I am very proud of our efforts over the past few months and hope to 4,5-Dibromo-1H-1,2,3-triazole help many people in the next few years.

Reference:
Patent; SYNGENTA LIMITED; WO2007/96576; (2007); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Related Products of 584-13-4, New discoveries in chemical research and development in 2021. We’ll be discussing some of the latest developments in chemical about CAS: 584-13-4, name is 4H-1,2,4-Triazol-4-amine, 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.

General procedure: 4-Amino-1,2,4-triazole (0.005 mol) was taken in 150 mL beaker and dissolved in ethanol (10 mL). Equimolar amount of substituted benzaldehyde was added to the ethanolic solution. Then, 0.5 mL of glacial acetic acid was added dropwise to the reaction mixture and stirred with glass rod. The contents were irradiated in MW at 360W for required time with continuous monitoring by TLC. Then the reaction mixture was filtered. Crude product was recrystallized from ethanol to obtain pure compound. Same procedure was repeated but with different amount of catalysts, i.e., 0.75 mL and 1 mL. The progress of reaction was monitored by TLC after 10 s interval. On completion of reaction, resultant mass was filtered and recrystallized from ethanol. The same procedure was used for the synthesis of rest of the compounds.

I am very proud of our efforts over the past few months and hope to 4H-1,2,4-Triazol-4-amine help many people in the next few years.

Reference:
Article; Mhaske, Sadhana D.; Takate, Sushama J.; Dhawale, Rhushikesh N.; Akolkar, Hemantkumar N.; Randhavane, Pratibha V.; Karale, Bhausaheb K.; Indian Journal of Heterocyclic Chemistry; vol. 27; 1; (2017); p. 89 – 97;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Reference of 16681-65-5, New Advances in Chemical Research in 2021. As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 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 16: step a(2,4-dimethylthiazol-5-yl)(1-methyl-1H-1,2,3-triazol-5-yl)methanol1 -Methyl- lH-l ,2,3-triazole was prepared according to the literature reference WO2008/98104. To a 2 L flask containing 1 -methyl- l H-l ,2,3-triazole (9 g, 108.3 mmol) was added THF (1500 mL) and the solution was cooled to -40 C. To this colorless homogeneous solution was added -butyllithium (2.5 M in hexanes, 45 mL, 1 12.5 mmol) dropwise which immediately afforded a dark brown viscous mixture. The mixture was kept between -10 to -20 C for 60 minutes, then a THF solution of 2,4-dimethylthiazole-5-carbaldehyde (17.2 g, 121 ,8 mmol in 200 mL THF) was introduced via cannula. Once the aldehyde was added the reaction was allowed to warm to room temperature. After 3 hours, the reaction was quenched by pouring it into a saturated solution of aqueous NH4C1. The aqueous portion was extracted with EtOAc in portions, 7 x 400 mL, The combined organics were washed with brine, dried over MgS04, filtered and concentrated to afford a brown oil. Chromatography on silica gel (10%) acetone-DCM increasing to 50% acetone and increasing to 10% MeOH-DCM) provided the title compound as an amber solid.

By the way, if you are interested in learning more fun chemistry with your kids, get your hands into one chemistry set now, and start enjoying the best part of chemistry: experiments about 1-Methyl-1H-1,2,3-triazole.

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. 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 belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. 288-36-8

A) to the reactor were added successively 1mol difluorophenyl chloride, 1.2mol triazole, 0.15molCuI, 1.5mol potassium carbonate and 0.8LDMF (N, N- dimethylformamide), heated to 80 stirred 10 hours, TLC (thin layer chromatography) to detect the reaction was complete; the filtrate was filtered, concentrated under reduced pressure recovery DMF, the residue is recrystallized from ethyl acetate-white solid, that is the first product in a yield of 73% ;

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1H-1,2,3-Triazole, in my other articles.

Reference:
Patent; Liu, Ke; (7 pag.)CN105777740; (2016); A;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

New discoveries in chemical research and development 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. 7343-33-1, name is 5-Bromo-1H-1,2,4-triazole belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. name: 5-Bromo-1H-1,2,4-triazole

To a 250 mL reaction flask was added 3-bromo-lH-l,2,4-triazole (5 g, 33.8 mmol), copper(I) iodide (0.644 g, 3.38 mmol) and cesium carbonate (11.01 g, 33.8 mmol). The flask was evacuated/backfilled with N2, then DMSO (33.8 ml) and l-iodo-4-(trifluoromethoxy)benzene (4.87 g, 16.90 mmol) were added. The reaction mixture was heated to 100 °C for 20 h. The reaction was cooled to room temperature, diluted with EtOAc and filtered through a plug of Celite. The Celite was further washed with EtOAc. Water was added to the combined organics, and the layers were separated. The aqueous phase was neutralized to pH 7, and further extracted with EtOAc. The combined organics were concentrated in vacuo.Purification via flash chromatography (silica/EtO Ac/Hex) yielded 3-bromo-l-(4- (trifluoromethoxy)phenyl)-lH-l,2,4-triazole as an off white solid (3.78 g, 12.27 mmol,72.6percent): mp 69-70 °C; ]H NMR (400 MHz, CDC13) delta 8.44 (s, 1H), 7.70 (d, / = 8.9 Hz, 2H), 7.38 (d, J = 8.5 Hz, 2H); 19F NMR (376 MHz, CDC13) delta -58.04; EIMS m/z 307.

If you are hungry for even more, make sure to check my other article about 7343-33-1, the application of this compound in the production field has become more and more popular.

Reference:
Patent; DOW AGROSCIENCES LLC; CROUSE, Gary D.; DEMETER, David A.; SPARKS, Thomas C.; WANG, Nick X.; DENT, William Hunter; DEAMICIS, Carl; NIYAZ, Noormohamed M.; BAUM, Erich W.; FISCHER, Lindsey Gayle; GIAMPIETRO, Natalie Christine; WO2013/9791; (2013); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Related Products of 252742-72-6, 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. 252742-72-6, name is 3-(Chloromethyl)-1H-1,2,4-triazol-5(4H)-one, molecular formula is C3H4ClN3O, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

A mixture of Example 87D (0.05 g, 0.126 mmol) and N-ethyl-N-isopropylpropan-2-amine (0.132 ml, 0.757 mmol) in Nu,Nu-dimethylformamide (1 mL) was treated with Example 637A (0.020 g, 0.151 mmol) and the reaction was stirred at room temperature for 3 hours. Additional N-ethyl-N- isopropylpropan-2-amine (0.05 mL) and additional Example 637A (0.010 g, 0.076 mmol) were added and the mixture was stirred 3 hours longer. The reaction mixture was directly purified by reverse phase HPLC on a Phenomenex Luna C8(2) 5 um IotaOmicronthetaAlpha AXIA column (30 mm x 75 mm) eluting with a gradient of 10-70percent acetonitrile in 0.1 percent ammonium acetate/water to afford the title compound. lH NMR (500 MHz, DMSO-d6) delta ppm 2.44 – 2.52 (m, 2H), 2.64 (t, J = 5.8 Hz, 2H), 3.14 (q, J = 2.7 Hz, 2H), 3.40 (s, 2H), 3.73 (s, 3H), 6.19 (d, J = 2.1 Hz, 1H), 6.44 – 6.51 (m, 1H), 7.02 (d, J = 4.9 Hz, 1H), 7.14 – 7.32 (m, 3H), 8.18 (d, J = 4.9 Hz, 1H), 1 1.24 (s, 1H), 1 1.30 – 1 1.39 (m, 1H), 1 1.77 (d, J = 2.2 Hz, 1H). MS (ESI+) m/z 421.1(M+H)+.

The result showed that such a combination of chemo- and biocatalysis improved the catalytic yield more than two times compared with that of sole metal catalysis.I hope my blog about 3-(Chloromethyl)-1H-1,2,4-triazol-5(4H)-one is helpful to your research.

Reference:
Patent; ABBVIE INC.; ABBVIE PHARMACEUTICAL TRADING (SHANGHAI) CO., LTD.; TONG, Yunsong; BRUNCKO, Milan; CLARK, Richard F.; CURTIN, Michael L.; FLORJANCIC, Alan S.; FREY, Robin R.; GONG, Jianchun; HANSEN, Todd M.; JI, Zhiqin; LAI, Chunqiu; MASTRACCHIO, Anthony; MICHAELIDES, Michael; MIYASHIRO, Juliem; RISI, Roberto M.; SONG, Xiaohong; TAO, Zhi-fu; WOODS, Keith W.; ZHU, Guidong; PENNING, Thomas; SOUERS, Andrew; GOSWAMI, Rajeev; IQUTURI, Omprakash Reddy; DABBEERU, Madhu Babu; WO2014/139328; (2014); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

New discoveries in chemical research and development in 2021. As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world.4922-98-9, name is 5-Phenyl-1H-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-Phenyl-1H-1,2,4-triazol-3-amine

3-Phenyl-1,2,4-triazol-5-amine (12, 3.20 g, 20 mmol) was dissolved in cold DMF (8 mL). Carbondisulphide (1.2 mL, 20 mmol) was added drop-wise, followed by 10 N KOH solution (2 mL, 20 mmol).The reaction mixture was stirred for 1 h on an ice-bath. Iodomethane (1.25 mL, 20 mmol) was added,and stirring was continued for 10 min. Subsequently, the ice-bath was removed and the reactionmixture was stirred for 2 h. Cold water (15 mL) was added to the mixture, the yellow precipitate wasfiltered, washed with water, dried and recrystalized from EtOH. Yield 80 mg, 32%; mp 207-209 C(EtOH). 1H-NMR (300 MHz, DMSO-d6): 2.63 (3H, s, SMe), 7.47-7.57 (3H, m, H-30, H-40 and H-50),8.03 (2H, dd, J = 6.8, 3.0 Hz, H-20 and H-60), 8.64 (2H, s, NH2). 13C-NMR (75 MHz, DMSO-d6): 18.8,126.6 (2C), 128.8 (2C), 129.1, 130.6, 157.5, 158.8, 199.5. Combustion elemental analysis calculated forC10H10N4S2: C, 47.98; H, 4.03; N, 22.38. Found: C, 48.06; H, 4.12; N, 22.14.

We’ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 5-Phenyl-1H-1,2,4-triazol-3-amine ,and how the biochemistry of the body works.

Reference:
Article; Junaid, Ahmad; Lim, Felicia Phei Lin; Zhou, Yvonne Peijun; Chui, Wai Keung; Dolzhenko, Anton V.; Molecules; vol. 24; 8; (2019);,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Related Products of 1001401-62-2, New discoveries in chemical research and development in 2021. We’ll be discussing some of the latest developments in chemical about CAS: 1001401-62-2, name is 2-(2H-1,2,3-Triazol-2-yl)benzoic acid, 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.

Intermediate 24: N-[(1S,2R)-2-Aminocyclopentyl]-2-(2H-l,2,3-triazol-2-yl)benzamide hydrochloride To a solution of ieri-butyl N-[(i ?,2S)-2-aminocyclopentyl] carbamate (CAS number 721395-15-9; 250 mg, 1.248 mmol) in dry DCM (4 ml) was added 2-(2H- 1,2,3 -triazol-2- yl)benzoic acid (CAS number 1001401-62-2; 283 mg, 1.498 mmol), aza-HOBt (289 mg, 1.872 mmol), triethylamine (0.522 ml, 3.74 mmol) and EDC (359 mg, 1.872 mmol). The reaction was stirred at room temperature for 18 hours then diluted with DCM (20 ml) and washed with HCl (aq, 1M, 20 ml), water (10 ml), saturated sodium bicarbonate solution (20 ml) and brine (10 ml). The organic s were filtered through a hydrophobic frit and concentrated in vacuo to afford a residue which was purified by column chromatography (silica, 10-100% ethyl acetate / petrol) to afford a solid. This Boc-protected intermediate was dissolved in hydrogen chloride in 1,4-dioxane (4 M, 10 ml) and stirred at room temperature for 2 hours. The resulting mixture was concentrated in vacuo thenazeotropically distilled with toluene to afford the title compound.1H NMR (400 MHz, DMSO-d6): delta ppm 1.48 – 1.69 (m, 1 H), 1.61 – 1.84 (m, 3 H), 1.85 – 1.97 (m, 1 H), 1.96 – 2.13 (m, 1 H), 3.52 – 3.67 (m, 1 H), 4.19 – 4.37 (m, 1 H), 7.50 – 7.62 (m, 1 H), 7.61 – 7.71 (m, 1 H), 7.70 – 7.78 (m, 1 H), 7.81 – 7.85 (m, 1 H), 7.93 (br. s., 3 H), 8.08 (s, 2 H), 8.32 – 8.48 (m, 1 H)MS ES+: 272

In the meantime we’ve collected together some recent articles in this area about 2-(2H-1,2,3-Triazol-2-yl)benzoic acid to whet your appetite. Happy reading!

Reference:
Patent; TAKEDA CAMBRIDGE LIMITED; TAKEDA PHARMACEUTICAL COMPANY LIMITED; FIELDHOUSE, Charlotte; GLEN, Angela; ROBINSON, John Stephen; FUJIMOTO, Tatsuhiko; WO2015/55994; (2015); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics