Tag: M.W=0-100

Research speed reading in 2021. We’ll be discussing some of the latest developments in chemical about CAS: 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. name: 1H-1,2,3-Triazole

To a mixture of 2-bromo-4-fluorobenzoic acid (30 g, 137 mmol), cesium carbonate (89.26 g, 274 mmol) and Cul (5.27 g, 27.4 mmol) in DMF (200 mL) were added NN?20 dimethylcyclohexane-1,2-diamine (3.7 mL,23.3 mmol) and 1H-1,2,3-triazole (18.92 g, 274mmol). The resulting mixture was stirred at 110 C overnight, cooled, concentrated in vacuo and diluted with water (150 mL). The aqueous mixture was extracted with EtOAc (300 mL x 3). The aqueous layer was acidified with 2N HC1 and extracted with EtOAc (300 mL x 4). The combined organic layers were washed with brine (150 mL x 3), dried over Na2504, filtered andthe filtrate was concentrated in vacuo. The residue was purified by chromatography on silica gel (petroleum ether: EtOAc = 100: 1 5 : 1) to provide the title compound. LRMS m/z (M+H) 208.0 found, 208.0 required.

In conclusion, we affirm that quantitative kinetic descriptions of catalytic behavior continue to serve as an indispensable tool to navigate research efforts intended to model. Read on for other articles about 288-36-8.

Reference:
Patent; MERCK SHARP & DOHME CORP.; KIM, Ronald; KUDUK, Scott, D.; LIVERTON, Nigel; ZHUO, Gang; (97 pag.)WO2016/100157; (2016); A2;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Related Products of 7170-01-6, 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. 7170-01-6, name is 3-Methyl-1H-1,2,4-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.

Prepared according to Mastalerz et al. J. Med. Chem. 1988, 31, 1190. To a solution of compounds A/B, step 1 (1.60 g, 3.44 mmol) in ACN:water (2:1, 45 mL) was added K2S2O8 (1.86 g, 6.88 mmol) followed by K2HPO4 (1.50 g, 8.60 mmol). The resulting mixture was heated to 90 C. for 4 h, whereupon it was cooled to rt then diluted with EtOAc and the layers separated. The aqueous layer was extracted with EtOAc (3 x) and the combined organic layers were dried over Na2SO4 and concentrated in vacuo. The crude residue was purified via silica gel chromatography (MeOH-DCM, 10%), to afford the title compounds (mixture, 670 mg, 62%) as a white solid. The mixture was further purified via chiral HPLC (Chiralcel-OJ, 2×25 cm, EtOH-Hexanes, 18%), affording compound A (250 mg) and compound B (240 mg).

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-Methyl-1H-1,2,4-triazole is helpful to your research.

Reference:
Patent; NOVARTIS AG; AULAKH, Virender Singh; CASAREZ, Anthony; LIN, Xiaodong; LINDVALL, Mika; MCENROE, Glenn; MOSER, Heinz Ernst; RECK, Folkert; TJANDRA, Meiliana; SIMMONS, Robert Lowell; YIFRU, Aregahegn; ZHU, Qingming; US2015/266867; (2015); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Related Products of 288-88-0, 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. 288-88-0, name is 1H-1,2,4-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.

Weigh 0.691 g (10 mmol) of 1,2,4-triazole,Para-fluorobenzaldehyde 1.240 g (10 mmol) and anhydrous potassium carbonate 2.760 g (20 mmol) were weighed out,Was dissolved in 25 mL of N, N-dimethylformamide,Add to a thermometer,In a 50 mL four-necked flask equipped with a stirrer,80 under the reaction after 10h stop heating,Filtered to remove potassium carbonate,Ethyl acetate extraction,After the solvent was removed by rotary evaporation,An off-white solid,Recrystallized three times with ethanol,Get pure,Drying at 50 C in vacuo for 6h gave 4- (1-1,2,4-triazolyl) benzaldehyde.

Future efforts will undeniably focus on the diversification of the new catalytic transformations. These may comprise an expansion of the substrate scope from aromatic and heteroaromatic compounds to other hydrocarbons. Keep reading other articles of 288-88-0.

Reference:
Patent; Zibo Vocational Institute; Zhang Ye; Liu Hongming; (14 pag.)CN104119286; (2017); B;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Research speed reading in 2021. We’ll be discussing some of the latest developments in chemical about CAS: 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. SDS of cas: 288-36-8

2-iodobenzoic acid (1 g, 4.03 mmol), 2H-l,2,3-triazole (0.334 g, 4.84 mmol), copper(I) iodide (0.768 g, 4.03 mmol), cesium carbonate (2.63 g, 8.06 mmol) were reacted in DMF at 120 C under microwave irradiation for 20 minutes. Then the reaction was monitored confirming the presence of the required product. Large amount of starting material resulted left. The reaction was further irradiated for 20 minutes at 120 C. Solvent was then removed under vacuum, poured into water (100 ml) and neutralised with 37% HC1. Aqueous phase was extracted with Et20 (3×100 ml), and the collected organic phases were concentrated to give 1 g of crude material. This was purified with Biotage SP1 (over a 340g C18 column) eluting with a gradient of ACN and water (modified with 0.5% HCOOH). Fractions were collected and concentrated under vacuum to give the title compound D43 as colourless solid (140 mg). UPLC (GEN QC Basic): rt = 0.29 minutes, peak observed: 188 (M-l) C9H7N302 requires: 189. 1H NMR (400 MHz, CHLOROFORM-d) delta ppm 6.47 (br. s., 1 H) 7.47 – 7.59 (m, 1 H) 7.66 (t, 1 H) 7.75 – 7.87 (m, 3 H) 7.91 (d, 1 H)

In conclusion, we affirm that quantitative kinetic descriptions of catalytic behavior continue to serve as an indispensable tool to navigate research efforts intended to model. Read on for other articles about 288-36-8.

Reference:
Patent; GLAXO GROUP LIMITED; DI FABIO, Romano; WO2012/89606; (2012); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Related Products of 288-88-0, 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. 288-88-0, name is 1H-1,2,4-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.

Stage 79.3: 4-(1,2,4] Triazol-1-yl-benzaldehydeTo a solution of 6.44 ml (60 mmol) of p-fluorobenzaldehyde in 40 ml of pyridine, 4.14 g (60 mmol) of 1,2,4-triazole, 0.286 g (2 mmol) of copper(I)oxide and 9.12 g (66 mmol) of potasium carbonate are succesively added at r.t. After stirring for 18 h at 125 C., the reaction mixture is concentrated under reduced pressure. The residue is diluted with CHCl3 and filtered through celite. The filtrate is concetrated and purified by flash column chromatography on silica gel (eluent: n-Hexane:AcOEt=4:1?AcOEt only?AcOEt: MeOH=20:1) to give 4-[1,2,4] triazol-1-yl-benzaldehyde as major product and 4-[1,3,4] triazol-1-yl-benzaldehyde as minor product. 1H-NMR (400 MHz, CDCl3): 7.61 (d, 2H, J=8.56 Hz), 8.09 (d, 2H, J=8.56 Hz), 8.59 (s, 1H), 10.10 (s, 1H) (minor product); 7.91 (d, 2H, J=7.07 Hz), 8.05 (d, 2H, J=7.07 Hz), 8.16 (s, 1H), 8.69 (s, 1H), 10.07 (s, 1H) (major product).

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

Reference:
Patent; Novartis AG; US7138432; (2006); B1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

New discoveries in chemical research and development 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. 7343-34-2, name is 3,5-Dimethyl-4H-1,2,4-triazole belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. Recommanded Product: 3,5-Dimethyl-4H-1,2,4-triazole

To a stirred solution of Compound 1g in ACN (100 ml) were added Cs2CO3 (125.6 g, 386.15 mmol) and ethyl 2-bromopropanoate (39.43 ml, 283.15 mmol) at 25° C. The mixture was stirred for 16 h at room temperature, The progress of the reaction was monitored by TLC (5percent MeOH in DCM, Rf=0.5, PMA active). After completion of the reaction, the reaction mixture was filtered and washed with EtOAc (300 ml). The filtrate was washed with water (2×200 ml), brine (2×200 ml). The organic layer was dried over anhydrous sodium sulfate and concentrated to obtain 35 g crude product. The crude product was purified by normal phase column chromatography using silica (100-200 mesh), eluting with 2percent MeOH in DCM. The collected fractions were evaporated to obtain Compound 2g (30 g, 59.17percent) as a pale yellow liquid. The desired isomer was confirmed by NOE analysis. 1H NMR (400 MHz, DMSO-d6) delta ppm: 5.22-5.34 (m, 1H), 4.03-4.18 (m, 2H), 2.32 (s, 3H), 2.16 (s, 3H), 1.60 (d, J=7.23 Hz, 3H), 1.06-1.19 (m, 3H); LCMS: 75.07percent (198.17, M+H), RT=1.18 min.

If you are hungry for even more, make sure to check my other article about 7343-34-2, the application of this compound in the production field has become more and more popular.

Reference:
Patent; pH Pharma Co., Ltd.; Jammalamadaka, Vasu; Tipton, Kimberly Ann; Satyal, Sanjeev; Huh, Hoyoung; (69 pag.)US2019/84996; (2019); 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. 7170-01-6, name is 3-Methyl-1H-1,2,4-triazole belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. 7170-01-6

For the preparation of [Zn(atz)2]·guest (MAF-66), 73 mg of 3-amino-1,2,4-triazole (atz) was dissolved in 50 mL of isopropylalcohol and 40 mg of Zn(OH)2 was dissolved in 50 mL of a 25% aqueous ammonia solution. The solutions were mixed together and stirred for several minutes. The final solution was left at room temperature for 3 d to evaporate slowly. The obtained colorless crystals were centrifuged and washed three times with water and isopropyl alcohol, and then air-dried. Elem. Anal. Calcd. (%) for C7H15.2N8O1.6Zn ([Zn(atz)2]·0.6H2O·1.0C3H8O): C, 27.80; H, 5.07;N, 37.05; Zn, 21.62. Found: C, 27.83; H, 4.86; N, 37.02; Zn, 22.77.

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 7170-01-6

Reference:
Article; Kim, Han-Ung; Babu, Robin; Roshan, Roshith; Park, Dae-Won; Applied Catalysis A: General; vol. 538; (2017); p. 59 – 65;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

New discoveries in chemical research and development 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. 16681-65-5, name is 1-Methyl-1H-1,2,3-triazole belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. SDS of cas: 16681-65-5

To a flask containing 1-methyl-1H-1,2,3-triazole (200 mg, 2.41 mmol) was added THF (15 mL) and the solution was cooled to -45 C. using a CH3CN-CO2 bath. n-BuLi (2.5 M in hexanes, 1.0 mL, 2.5 mmol) was added dropwise which afforded an opaque white suspension. The mixture was stirred at -45 C. for 25 minutes, then a solution of (4-chloro-3-cyclopentyl-2-methoxyquinolin-6-yl)(1,2-dimethyl-1H-imidazol-5-yl)methanone (475 mg, 1.24 mmol, Intermediate 68: step c) in THF (3 mL) was introduced. After 10 minutes, the -45 C. bath was replaced with an ice-water bath. After 30 minutes, the reaction mixture was quenched with aqueous NH4Cl solution and extracted with EtOAc:THF (2:1, 3*40 mL). The combined organics were washed with brine, dried over MgSO4, filtered and concentrated. Chromatography on silica gel (3% MeOH-DCM increasing to 10% MeOH) provided the title compound as a light tan solid. 1H NMR (500 MHz, CDCl3) delta ppm 8.24 (d, J=1.9 Hz, 1H), 7.69 (d, J=8.7 Hz, 1H), 7.35 (dd, J=8.7, 2.0 Hz, 2H), 7.07 (s, 1H), 6.01 (s, 1H), 4.07 (s, 3H), 3.90-3.80 (m, 4H containing a 3H singlet at 3.86), 3.32 (s, 3H), 2.06-1.94 (m, 3H), 1.94-1.84 (m, 6H), 1.75-1.69 (m, 2H). MS (ESI): mass calcd. for C24H27ClN6O2, 466.2. m/z found 467.1 [M+H]+. The racemate was separated by chiral SFC (Stationary phase: Chiralpak AD-H, 5 mum 250×20 mm, Mobile phase: 70% CO2: 30% EtOH (0.3% iPrNH2)) to give Example 135b as the first compound that eluted from the chiral column and Example 135c as the second compound that eluted from the chiral column.

If you are hungry for even more, make sure to check my other article about 16681-65-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; JOHNSON & JOHNSON; 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.; FOURIE, ANNE; XUE, XIAOHUA; CUMMINGS, MAXWELL D.; MCCLURE, KELLY; TANIS, VIRGINIA; US2015/111870; (2015); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Related Products of 41253-21-8, New Advances in Chemical Research in 2021. The prevalence of solvent effects in heterogeneous catalysis in condensed media has motivated developing quantitative kinetic,A common heterocyclic compound, 41253-21-8, name is Sodium 1,2,4-triazol-1-ide, molecular formula is C2H2N3Na, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

2-(lH-l,2,4-Triazol-l-yl)benzonitrile. A suspension of 2-fluorobenzylnitrile (3.0 g, 25 mmol) and 1,2,4-triazole sodium salt (2.4 g, 27 mmol) were stirred in tetrahydrofuran (7 mL) and dimethylformamide (14 mL) at 95 0C for 18 h. After cooling and concentrating, the product was crystallized from hot CH2Cl2/hexane (1:1) to give the title compound as a white solid (4.25 g, 100% yield). 1H-NMR (300 MHz, CDCl3) 6 ppm: 8.74 (IH, s), 8.16 (IH, s), 7.82 (IH, dd, J= 4.9,1.3 Hz), 7.77-7.25 (2H, m), 7.57-7.51 (IH, m). LCMS [M+H]+ calcd for C9H7N4: 171.06; found: 171.12.

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

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; WO2007/64316; (2007); 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. 16681-65-5, name is 1-Methyl-1H-1,2,3-triazole belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. COA of Formula: C3H5N3

To a flask containing 1-methyl-1H-1,2,3-triazole (150 mg, 1.81 mmol) was added THF (15 mL) and the colorless homogeneous solution was cooled to -43 C. using a CH3CN-CO2 bath. n-BuLi (2.5M in hexanes, 0.7 mL, 1.75 mmol) was added drop wise via syringe which afforded an opaque mixture. The suspension was stirred at -40 C. for 30 min, then a THF solution of tert-butyl-3-(4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinoline-6-carbonyl)azetidine-1-carboxylate (430 mg, 0.8 mmol, in 2 mL THF, Intermediate 66: step b) was introduced at -40 C. The reaction mixture was allowed to warm gradually to room temperature over 45 min and then quenched with NH4Cl solution. The aqueous portion was extracted with EtOAc (3*30 mL) and the combined organics were washed with brine, dried over MgSO4, filtered and concentrated to provide an amber gum. Chromatography on silica gel (10% acetone-hexane increasing to 30% acetone) afforded the title compound (170 mg) as a white amorphous solid. 1H NMR (500 MHz, CDCl3) delta 8.24 (d, J=2.1 Hz, 1H), 7.78 (d, J=8.8 Hz, 1H), 7.56-7.47 (m, 3H), 7.40 (d, J=8.1 Hz, 2H), 7.35 (dd, J=8.7, 2.1 Hz, 1H), 4.35 (s, 2H), 4.20 (t, J=8.8 Hz, 1H), 4.07 (s, 3H), 4.00 (dd, J=9.3, 5.6 Hz, 1H), 3.92 (dd, J=8.9, 5.7 Hz, 1H), 3.67 (s, 3H), 3.62 (t, J=8.8 Hz, 1H), 3.52-3.38 (m, 1H), 1.38 (s, 9H). MS (ESI): mass calcd. for C30H31ClF3N5O4: 618.06, m/z found 619.9 [M+H]+.

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 1-Methyl-1H-1,2,3-triazole help many people in the next few years.

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