Category: 19745-07-4

In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 19745-07-4, name is 2,5-Dichloropyrazine belongs to pyrazines compound, it is a common compound, a new synthetic route is introduced below. COA of Formula: C4H2Cl2N2

[Referential Example 11] 1-(5-Methoxy-2-pyrazinyl)-5-(2-pyridyl)-1H-pyrazole-3-carboxylic acid; [Show Image] [Show Image] 1) 5-Chloro-2-hydrazinopyrazine; A solution of 5-chloro-2-hydroxpyrazine (1.84 g) synthesized from aminopyrazine by the method of Palamidessi et al. (J.Org.Chem., vol.29, pp 2491-2492, 1964) in phosphorus oxychloride (28ml) was placed in a sealed tube, and the solution was stirred at an outer temperature of 130°C for 6 hours. After cooling with air, ice cold water and dichloromethane were added to the reaction liquid, then the phases were separated. The organic layer was dried over anhydrous sodium sulfate. After filtration, the solvent was evaporated under reduced pressure. Hydrazine monohydrate (1.39 ml) was added to a solution of the residue in ethanol (14 ml), and the mixture was stirred at room temperature for 150 minutes and for another 15 minutes at 80°C. After cooling with air, the reaction liquid was evaporated under reduced pressure, and to the residue was added water and a mixed solvent of chloroform and methanol (1:10), then the phases were separated. The organic layer was dried over anhydrous sodium sulfate. After filtration, the solvent was evaporated under reduced pressure to give 5-chloro-2-hydrazinopyrazine(0.325 g, 16percent) as a solid. 1H-NMR (400 MHz, DMSO-d6)delta: 4.32 (2H, br s), 7.92 (1H, s), 7.99 (1H, s), 8.13 (1H, s). EI-MSm/z: 144 (M+).

The synthetic route of 19745-07-4 has been constantly updated, and we look forward to future research findings.

Electric Literature of 19745-07-4, The chemical industry reduces the impact on the environment during synthesis 19745-07-4, name is 2,5-Dichloropyrazine, I believe this compound will play a more active role in future production and life.

To a stirred solution of cesium carbonate (492 g, 1510 mmol) in DMF (1000 mL) was added (S)-(2, 2-dimethyl-l, 3-dioxolan-4-yl) methanol (133 g, 1007 mmol) at 0 C. The resulting reaction mixture was stirred at room temperature for 30 min. Then a solution of 2, 5-dichloropyrazine (150 g, 1007 mmol) in DMF (500 mL) was added at 0 C and the resulted reaction mixture was stirred at 100 C for 4 h. (TLC System: 20% Ethyl acetate in Petether, R 0.5, UV active). The reaction mixture was diluted with ice cold water (500 mL), extracted with EtOAc (3 x 300 mL). The combined organic layer was washed with water (2 x 200 mL) and brine solution (100 mL), dried over anhydrous Na2S04, filtered and concentrated under reduced pressure to obtain crude compound. The crude compound was purified by flash column chromatography (silica gel: 100-200 mesh, eluent: 10 % EtOAc in Hexane) to afford the desired product (,S)-2-chloro-5-((2, 2-dimethyl-l, 3- dioxolan-4-yl) methoxy) pyrazine (200 g, 768 mmol, 76 % yield) as a yellow liquid. LCMS (m/z): 245.1 [M+H]+.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 2,5-Dichloropyrazine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY (NO.2) LIMITED; ELLIS, James Lamond; EVANS, Karen Anderson; FOX, Ryan Michael; MILLER, William Henry; SEEFELD, Mark Andrew; (766 pag.)WO2016/79709; (2016); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Related Products of 19745-07-4, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 19745-07-4 name is 2,5-Dichloropyrazine, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

A mixture of A-63 (1 g, 6.71mmol), [4-(trifluoromethoxy)phenyl]- boronic acid (1.52 g, 7.38 mmol), Pd(dppf)Cl2.CH2Cl2 (822.23 mg, 1.01 mmol) and Cs2C03 (4373.74 mg, 13.42 mmol) in 1,4-dioxane (20 mL) and water (4 mL) under N2 was stirred at 90 C for 16 hours. After cooling, the reaction mixture was diluted with EtOAc (20 mL), and filtered through a Celite pad, eluted with EtOAc (20 mL), and concentrated. The residue was purified by flash chromatography on silica gel (EtOAc in PE = 0percent to 3percent to 8percent) to afford A-108 (250 mg, 0.91 mmol) as a solid. 1H NMR (400MHz, CDC13) _ = 8.79 (d, 1H), 8.65 (d, 1H), 8.05 (d, 2H), 7.37 (d, 2H)

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2,5-Dichloropyrazine, and friends who are interested can also refer to it.

In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 19745-07-4 as follows. Recommanded Product: 19745-07-4

2.3 g of benzyl alcohol was added under ice-cooling to a mixture of 3.0 g of 2,5-dichloropyrazine, 880 mg of sodium hydride (60percent, oil) and 50 mL of NMP.The reaction mixture was warmed to room temperature and stirred at room temperature for 5 hours.Water was added to the obtained reaction mixture, and the mixture was extracted with ethyl acetate. The obtained organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure.The obtained residue was subjected to silica gel chromatography to obtain 3.1 g of Intermediate 1 represented by the following formula.

According to the analysis of related databases, 19745-07-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; SUMITOMO CHEMICAL COMPANY LIMITED; NAKAJIMA, YUJI; (211 pag.)JP2017/114883; (2017); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Related Products of 19745-07-4, Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 19745-07-4, name is 2,5-Dichloropyrazine, This compound has unique chemical properties. The synthetic route is as follows.

Step D: A flask was charged with (S)-3-(3-chloro-5-(trifluoromethyl)pyridin-2-ylamino)-l,4′-bipiperidin-2-one hydrochloride (0.075 g, 0.18 mmol), 2,5-dichloropyrazine (0.030 g, 0.20 mmol), Hunig’s base (0.095 mL, 0.54 mmol), and DMF (3 mL). The reaction was stirred at 100 ¡ãC overnight. The organic solvents were removed under reduced pressure. The residue was purified using silica gel column chromatography with 50-100percent ethyl acetate in hexanes to provide (S)-3-(3-chloro-5-(trifluoromethyl)pyridin-2-ylamino)-r-(5- chloropyrazin-2-yl)-[l,4′-bipiperidin]-2-one (0.037 g, 0.076 mmol, 42percent yield) as yellow solid. Mass spectrum (apci) m/z = 489.2 (M+H).

The chemical industry reduces the impact on the environment during synthesis 2,5-Dichloropyrazine. I believe this compound will play a more active role in future production and life.

Reference:
Patent; ARRAY BIOPHARMA INC.; AICHER, Thomas Daniel; BENCSIK, Josef Roland; BOYD, Steven Armen; CONDROSKI, Kevin Ronald; FELL, Jay Bradford; FISCHER, John P.; HINKLIN, Ronald Jay; PRATT, Scott Alan; SINGH, Ajay; TURNER, Timothy M.; WO2011/146335; (2011); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Adding a certain compound to certain chemical reactions, such as: 19745-07-4, name is 2,5-Dichloropyrazine, belongs to Pyrazines compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 19745-07-4, HPLC of Formula: C4H2Cl2N2

Step K: (3S,4S)-3-(2-fluoro-4-(methylsulfonyl)phenoxy)-4-hydroxy-l-(piperidin-4-yl)pyrrolidin-2-one hydrochloride (0.03 g, 0.073 mmol) was dissolved in DMF (2 mL) and 2,5-dichloropyrazine (0.012 g, 0.081 mmol) and Hunig’s base (0.040 mL, 0.22 mmol) were added. The reaction was heated at 100 ¡ãC for 4 hours. The reaction was cooled and concentrated. The residue was purified by reverse phase chromatography (5 to 95percent ACN in water) to afford (3S,4S)-l-(l-(5-chloropyrazin-2-yl)piperidin-4-yl)-3-(2-fluoro-4- (methylsulfonyl)phenoxy)-4-hydroxypyrrolidin-2-one (0.0027 g, 0.0056 mmol, 7.6percent yield). Mass spectrum (apci) m/z = 485.2 (M+H).

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 2,5-Dichloropyrazine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ARRAY BIOPHARMA INC.; AICHER, Thomas Daniel; BENCSIK, Josef Roland; BOYD, Steven Armen; CONDROSKI, Kevin Ronald; FELL, Jay Bradford; FISCHER, John P.; HINKLIN, Ronald Jay; PRATT, Scott Alan; SINGH, Ajay; TURNER, Timothy M.; WO2011/146335; (2011); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Electric Literature of 19745-07-4,Some common heterocyclic compound, 19745-07-4, name is 2,5-Dichloropyrazine, molecular formula is C4H2Cl2N2, 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.

In a sealed vessel, a mixture of tert-butyl (4-methylpiperidin-4-yl)carbamate (1.44 g, 6.71 mmol), 2,5-dichloropyrazine (1.00 g, 6.71 mmol) and K2C03(S) (4.64 g, 33.6 mmol) in dioxane (67.1 mL) was stirred for 60 h at 60 ¡ãC. After cooling to ambient temperature, the resulting suspension was diluted with EtOAc, filtered through Celite ? then concentrated in vacuo. The crude residue was purified by silica chromatography (0-100percent) EtOAc in hexanes) to afford the title compound (657 mg, 30percent yield). MS (apci) m/z = 327.1 (M+H).

The synthetic route of 19745-07-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ANDREWS, Steven W.; ARONOW, Sean; BLAKE, James F.; BRANDHUBER, Barbara J.; COLLIER, James; COOK, Adam; HAAS, Julia; JIANG, Yutong; KOLAKOWSKI, Gabrielle R.; MCFADDIN, Elizabeth A.; MCKENNEY, Megan L.; MCNULTY, Oren T.; METCALF, Andrew T.; MORENO, David A.; RAMANN, Ginelle A.; TANG, Tony P.; REN, Li; WALLS, Shane M.; (946 pag.)WO2018/71454; (2018); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 19745-07-4 as follows. Computed Properties of C4H2Cl2N2

To a mixture of 2,5-dichloropyrazine in 2-propanol (0.2 M) was added 4- hydroxypiperidine (2.2 equiv.). The reaction was heated in the microwave at 160 0C for 10 min.The solvent was evaporated under reduced pressure and the title compound was purified by flash chromatography eluting with ethyl acetate

According to the analysis of related databases, 19745-07-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; MERCK FROSST CANADA LTD.; WO2008/46226; (2008); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Electric Literature of 19745-07-4, In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 19745-07-4 as follows.

Step C: A flask was charged with (S)-3-(2,6-difluoro-4-(methylsulfonyl)phenylamino)-l,4′-bipiperidin-2-one hydrochloride (0.250 g, 0.590 mmol), 2,5-dichloropyrazine (0.105 g, 0.708 mmol), Hunig’s base (0.309 mL, 1.77 mmol), and DMF (5 mL). The reaction mixture was stirred at 100 ¡ãC overnight. The organic solvents were removed under reduced pressure. The residue was purified using silica gel column chromatography eluting with ethyl acetate to provide (S)-l’-(5-chloropyrazin-2-yl)-3-(2,6- difluoro-4-(methylsulfonyl)phenylamino)-[l,4′-bipiperidin]-2-one (0.102 g, 0.204 mmol, 34.6percent yield) as light yellow solid. Mass spectrum (apci) m/z = 500.1 (M+H).

According to the analysis of related databases, 19745-07-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; ARRAY BIOPHARMA INC.; AICHER, Thomas Daniel; BENCSIK, Josef Roland; BOYD, Steven Armen; CONDROSKI, Kevin Ronald; FELL, Jay Bradford; FISCHER, John P.; HINKLIN, Ronald Jay; PRATT, Scott Alan; SINGH, Ajay; TURNER, Timothy M.; WO2011/146335; (2011); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Adding a certain compound to certain chemical reactions, such as: 19745-07-4, name is 2,5-Dichloropyrazine, belongs to Pyrazines compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 19745-07-4, Quality Control of 2,5-Dichloropyrazine

analogously to Synthesis Example 13, Step 1, starting with 2,5-dichloropyrazine: HPLC-MS: (m/z): 196.1 (M+H)+. 1-(6-Fluoropyrazin-2-yl)-1H-pyrazole-3-amine:

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 2,5-Dichloropyrazine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; BAYER CROPSCIENCE AG; Heilmann, Eike Kevin; Greul, Joerg; Trautwein, Axel; Schwarz, Hans-Georg; Adelt, Isabelle; Andree, Roland; Luemmen, Peter; Hink, Maike; Adamczewski, Martin; Drewes, Mark; Becker, Angela; Voerste, Arnd; Goergens, Ulrich; Ilg, Kerstin; Jansen, Johannes-Rudolf; Portz, Daniela; US2015/239847; (2015); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem