Category: 5910-89-4

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 5910-89-4 as follows. Safety of 2,3-Dimethylpyrazine

A solution of 10.0 g (93.0 mmol) 2,3-dimethylpyrazine and 70.0 g (390 mmol) N-bromo- succinimide in 800 ml CCI4 is irradiated with a 250 Watt lamp at reflux temperature during 20 hours. After cooling the solution is filtered and the organic phase is washed with a 5% sodium thiosulfate solution and water. After evaporation of the organic phase, the residue is crystallised in ethanol to give 29.1 g (74%) of the title compound, m.p.: 167-1700C.

According to the analysis of related databases, 5910-89-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; SYNGENTA PARTICIPATIONS AG,; WO2007/20050; (2007); A2;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Reference of 5910-89-4, These common heterocyclic compound, 5910-89-4, name is 2,3-Dimethylpyrazine, 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.

The S-2-[3-(3-methylpyrazin-2-yl)isoxazol-5-yl]pyrrolidine starting material was prepared as follows: A mixture of 2,3-dimethylpyrazine (2Og, 18.5mmol), selenium dioxide (41.06g,25 37mmol) and diatomeous earth (2Og) in EtOAc (500ml) was stirred and heated at 7O0C for 2 hours. The mixture was allowed to cool and the insoluble matter was removed by filtration through diatomeous earth. The filtrate was washed with saturated aqueous sodium hydrogen carbonate solution and then saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was suspended in water (100ml) and30 hydroxylamine (45ml of a 50% aqueous solution) was added. The mixture was stirred at ambient temperature for 18 hours and the mixture then extracted with EtOAc. The extracts were combined, washed with saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was triturated with isohexane to give 3- EPO methylpyrazine-2-carboxaldehyde oxime (9.65g, 38%); NMR Spectrum 2.67 (s, 3H), 8.23 (s, IH), 8.45-8.49 (m, 2H), 11.87 (s, IH).

The synthetic route of 5910-89-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/109026; (2006); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Reference of 5910-89-4, A common heterocyclic compound, 5910-89-4, name is 2,3-Dimethylpyrazine, molecular formula is C6H8N2, 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 mixture of 2,3-dimethylpyrazine (2Og, 18.5mmol), selenium dioxide (41.06g, 37mmol) and diatomeous earth (2Og) in EtOAc (500ml) was stirred and heated at 700C for 220 hours. The mixture was allowed to cool and the insoluble matter was removed by filtration through diatomeous earth. The filtrate was washed with saturated aqueous sodium hydrogen carbonate solution and then saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was suspended in water (100ml) and hydroxylamine (45ml of a 50% aqueous solution) was added. The mixture was stirred at25 ambient temperature for 18 hours and the mixture then extracted with EtOAc. The extracts were combined, washed with saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was triturated with isohexane to give 3- methylpyrazine-2-carboxaldehyde oxime (9.65g, 38%); NMR Spectrum 2.67 (s, 3H), 8.23 (s, IH), 8.45-8.49 (m, 2H), 11.87 (s, IH).

The synthetic route of 5910-89-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/100461; (2006); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Adding a certain compound to certain chemical reactions, such as: 5910-89-4, name is 2,3-Dimethylpyrazine, 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 5910-89-4, Application In Synthesis of 2,3-Dimethylpyrazine

The S-2-[3-(3-methylpyrazin-2-yl)isoxazol-5-yl]pyrrolidine starting material was prepared as follows: A mixture of 2,3-dimethylpyrazine (2Og, 18.5mmol), selenium dioxide (41.06g,25 37mmol) and diatomeous earth (2Og) in EtOAc (500ml) was stirred and heated at 7O0C for 2 hours. The mixture was allowed to cool and the insoluble matter was removed by filtration through diatomeous earth. The filtrate was washed with saturated aqueous sodium hydrogen carbonate solution and then saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was suspended in water (100ml) and30 hydroxylamine (45ml of a 50% aqueous solution) was added. The mixture was stirred at ambient temperature for 18 hours and the mixture then extracted with EtOAc. The extracts were combined, washed with saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was triturated with isohexane to give 3- EPO methylpyrazine-2-carboxaldehyde oxime (9.65g, 38%); NMR Spectrum 2.67 (s, 3H), 8.23 (s, IH), 8.45-8.49 (m, 2H), 11.87 (s, IH).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2,3-Dimethylpyrazine, and friends who are interested can also refer to it.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/109026; (2006); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Related Products of 5910-89-4, A common heterocyclic compound, 5910-89-4, name is 2,3-Dimethylpyrazine, molecular formula is C6H8N2, 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.

2.56 g of 2,3-dimethyl-pyrazine (23.67 mmol) was dissolved in 100 mL of ethanol with 2.1 g 10% palladium on active carbon. The reaction mixture was hydrogenated under pressure (55-60 psi) for 3 days. The solid was filtered and removed. The filtrate was concentrated to afford 3.0 g of 2,3-dimethylpiperazine, which was used without purification. 1H NMR (400 MHz, CDCl3), delta (ppm): 2.95 (m, 4H), 2.74 (m, 2H), 1.04 (d, 6H).

The synthetic route of 5910-89-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Kalypsys, Inc.; US2005/234046; (2005); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Electric Literature of 5910-89-4,Some common heterocyclic compound, 5910-89-4, name is 2,3-Dimethylpyrazine, molecular formula is C6H8N2, 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 mixture of 2,3-dimethylpyrazine (2Og, 18.5mmol), selenium dioxide (41.06g, 37mmol) and diatomeous earth (2Og) in EtOAc (500ml) was stirred and heated at 700C for 220 hours. The mixture was allowed to cool and the insoluble matter was removed by filtration through diatomeous earth. The filtrate was washed with saturated aqueous sodium hydrogen carbonate solution and then saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was suspended in water (100ml) and hydroxylamine (45ml of a 50% aqueous solution) was added. The mixture was stirred at25 ambient temperature for 18 hours and the mixture then extracted with EtOAc. The extracts were combined, washed with saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was triturated with isohexane to give 3- methylpyrazine-2-carboxaldehyde oxime (9.65g, 38%); NMR Spectrum 2.67 (s, 3H), 8.23 (s, IH), 8.45-8.49 (m, 2H), 11.87 (s, IH).

The synthetic route of 5910-89-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/100461; (2006); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Some common heterocyclic compound, 5910-89-4, name is 2,3-Dimethylpyrazine, molecular formula is C6H8N2, 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. Safety of 2,3-Dimethylpyrazine

A mixture of 2,3-dimethylpyrazine (2Og, 18.5mmol), selenium dioxide (41.06g, 37mmol) and diatomeous earth (2Og) in EtOAc (500ml) was stirred and heated at 7O0C for 2 hours. The mixture was allowed to cool and the insoluble matter was removed by filtration EPO through diatomeous earth. The filtrate was washed with saturated aqueous sodium hydrogen carbonate solution and then saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was suspended in water (100ml) and hydroxylamine (45ml of a 50% aqueous solution) was added. The mixture was stirred at ambient temperature for 18 hours and the mixture then extracted with EtOAc. The extracts were combined, washed with saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was triturated with isohexane to give 3- methylpyrazine-2-carboxaldehyde oxime (9.65g, 38%); NMR Spectrum 2.67 (s, 3H), 8.23 (s, IH), 8.45-8.49 (m, 2H), 11.87 (s, IH).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 5910-89-4, its application will become more common.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/106307; (2006); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Some common heterocyclic compound, 5910-89-4, name is 2,3-Dimethylpyrazine, molecular formula is C6H8N2, 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. HPLC of Formula: C6H8N2

(a) A solution of 10.0 g (93.0 mmol) 2,3-dimethylpyrazine and70.0 g (390 mmol) N-bromo-succinimide in 800 ml CCl4 was irradiatedwith a 250 Watt lamp at reflux temperature during 20 h. After cooling the solution was filtered and the organic phase waswashed with a 5% sodium thiosulfate solution and water. Afterevaporation of the organic phase, the residue was crystallized inethanol to give 29.1 g 2,3-bis-dibromomethyl-pyrazine (25) (74%).1H NMR (CDCl3, 400 MHz): 7.1 (s, 2H), 8.6 (s, 2H). MS (electrospray):m/z = 420 [M+1], 422 [M+3], 424 [M+5], 426 [M+7], 428 [M+9]. Mp: 167-170 C.(b) To a solution of 38.0 g (90.0 mmol) 2,3-bis-dibromomethylpyrazine(25) and 70.0 g (400 mmol) diethyl maleate in 450 mlDMF was added 40.0 g (270.0 mmol) NaI and the mixture washeated at 80 C during 20 h. After evaporation of the solvent, theresidue was dissolved in 1000 ml t-butyl-methyl ether and washedwith a 5% sodium thiosulfate solution and water (5 times). Evaporationof the solvent and purification of the residue with flashchromatographygave 9.1 g quinoxaline-6,7-dicarboxylic aciddiethyl ester (26) (37%) as a dark oil.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 5910-89-4, its application will become more common.

Reference:
Article; Jeanguenat, Andre; Durieux, Patricia; Edmunds, Andrew J.F.; Hall, Roger G.; Hughes, Dave; Loiseleur, Olivier; Pabba, Jagadish; Stoller, Andre; Trah, Stephan; Wenger, Jean; Dutton, Anna; Crossthwaite, Andrew; Bioorganic and Medicinal Chemistry; vol. 24; 3; (2016); p. 403 – 427;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Related Products of 5910-89-4, 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. 5910-89-4, name is 2,3-Dimethylpyrazine belongs to pyrazines compound, it is a common compound, a new synthetic route is introduced below.

EXAMPLE III 2-(3-Hexyl-2-hydroxy-4-phenyl-3-buten-1-yl)-3-methylpyrazine STR11 To a solution of lithium diisopropylamide (1.5 Molar, 73.3 mL, 0.11 mole) in 150 mL of tetrahydrofuran at -78 C. is added slowly to a solution of 2,3-dimethylpyrazine (10.8 g, 0.1 mole) in 100 mL of tetrahydrofuran. The mixture is allowed to warm to room temperature and then cooled to -78 C. A solution of alpha-hexylcinnamaldehyde (23.7 g, 0.11 mole) in 100 mL of tetrahydrofuran is added dropwise over 15 minutes. The reaction product mixture is then worked up according to the procedures of Example I to provide the title compound.

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, 2,3-Dimethylpyrazine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Philip Morris Incorporated; Philip Morris Products Inc.; US5218118; (1993); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Related Products of 5910-89-4, The chemical industry reduces the impact on the environment during synthesis 5910-89-4, name is 2,3-Dimethylpyrazine, I believe this compound will play a more active role in future production and life.

A mixture of 2,3-dimethylpyrazine (2Og, 18.5mmol), selenium dioxide (41.06g, 37mmol) and diatomeous earth (2Og) in EtOAc (500ml) was stirred and heated at 7O0C for 2 hours. The mixture was allowed to cool and the insoluble matter was removed by filtration EPO through diatomeous earth. The filtrate was washed with saturated aqueous sodium hydrogen carbonate solution and then saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was suspended in water (100ml) and hydroxylamine (45ml of a 50% aqueous solution) was added. The mixture was stirred at ambient temperature for 18 hours and the mixture then extracted with EtOAc. The extracts were combined, washed with saturated aqueous sodium chloride solution, dried (MgSO4) and the solvent removed by evaporation. The residue was triturated with isohexane to give 3- methylpyrazine-2-carboxaldehyde oxime (9.65g, 38%); NMR Spectrum 2.67 (s, 3H), 8.23 (s, IH), 8.45-8.49 (m, 2H), 11.87 (s, IH).

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, 2,3-Dimethylpyrazine, other downstream synthetic routes, hurry up and to see.