Category: 13301-04-7

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 13301-04-7, name is Methyl 3,6-dibromopyrazine-2-carboxylate, A new synthetic method of this compound is introduced below., 13301-04-7

Step 1: Synthesis of compound (B) as described in the general reaction scheme; 3,6-dibromo-pyrazine-2-carboxylic acid LiOH (655 mg, 27 mmol) is added to a solution of 3,6-dibromo-pyrazine-2-carboxylic acid methyl ester (A) (J. Med. Chem. 1969, 12, 285-87) (2.7 g, 9 mmol) in THF:water:MeOH (18:4.5:4.5 mL). The reaction is stirred at 5 C. for 30 min, concentrated in vacuo, taken up in DCM and washed with 1N HCl. The organic phase is dried over anhydrous MgSO4 and concentrated in vacuo to afford compound (B). 1H NMR (250 MHz, CDCl3) delta ppm 8.70 (s, 1H).

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; WIGERINCK, Piet Tom Bert Paul; ANDREWS, Martin James Inglis; De WEER, Marc Maurice Germain; SABOURAULT, Nicholas Luc; KLUGE, Stefan Christian; US2011/118269; (2011); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

13301-04-7, The chemical industry reduces the impact on the environment during synthesis 13301-04-7, name is Methyl 3,6-dibromopyrazine-2-carboxylate, I believe this compound will play a more active role in future production and life.

To a solution of methyl 3,6-dibromopyrazine-2-carboxylate (583 mg, 1.97 mmol), and (2,3-dichlorophenyl)boronic acid (375 mg, 1.97 mmol) in dioxane (40 ml) was added CS2CO3 (1.93 g, 5.91 mmol) in H2O (10 mL) and PdCkdppf (144 mg, 0.2 mmol). The reaction was refluxed for 20 min, allowed to cool to rt, and extracted with EtOAc. The combined organic layers were washed with brine and dried over MgS04. The mixture was concentrated under reduced pressure. Purification by flash chromatography resulted in 370 mg (52%) of the desired product. NMR (500 MHz, CDCh) delta 8.58 – 8.53 (m, 1H), 7.38 – 7.32 (m, 1H), 7.29 – 7.22 (m, 1H), 7.14 – 7.08 (m, 1H), 3.82 – 3.76 (m, 3H).

The chemical industry reduces the impact on the environment during synthesis Methyl 3,6-dibromopyrazine-2-carboxylate. I believe this compound will play a more active role in future production and life.

Reference:
Patent; REVOLUTION MEDICINES, INC.; LI, Jie Jack; KOLTUN, Elena S.; GILL, Adrian Liam; BUCKL, Andreas; WON, Walter; AAY, Naing; MELLEM, Kevin; TZITZILONIS, Christos; JOGALEKAR, Ashutosh; CREGG, James Joseph; (177 pag.)WO2019/75265; (2019); 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 13301-04-7 as follows. 13301-04-7

A solution of methyl 3,6-dibromopyrazine-2-carboxylate (500 mg, 1.690 mmol, 1 equiv), (3S,4S)-3-methyl-2-oxa-8-azaspiro[4.5]decan-4-amine dihydrochloride (493.05 mg, 2.028 mmol, 1.2 equiv) and DIEA (1091.88 mg, 8.448 mmol, 5.0 equiv) in DMA (10 mL) was stirred for 2 at 55 C. Di-tert-butyl dicarbonate (552.33 mg, 2.531 mmol, 1.5 equiv) was then added and the resulting mixture was stirred for 2 h at room temperature. The reaction mixture was diluted with water and extracted with EtOAc. The organic layer was washed with water and brine, dried over anhydrous Na2S04 and concentrated. The residue was purified by silica gel column chromatography, eluted with PE/EtOAc =1 : 1 to afford the title compound (615 mg, 2 steps yield 75%) as yellow oil.

According to the analysis of related databases, 13301-04-7, the application of this compound in the production field has become more and more popular.

Reference:
Patent; NIKANG THERAPEUTICS, INC.; FU, Jiping; LOU, Yan; HE, Yigang; (0 pag.)WO2020/61101; (2020); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

13301-04-7,Some common heterocyclic compound, 13301-04-7, name is Methyl 3,6-dibromopyrazine-2-carboxylate, molecular formula is C6H4Br2N2O2, 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 solution of LiOH (121 mg, 5.07 mmol) in water (1 mL) was slowly added to a solution the pyrazine ester (500 mg, 1.67 mmol) in 1:1 THF/water (8 mL) at 0 C. After stirring at 0 C. for 45 min. The solvent was removed under reduced pressure. The residue was dissolved in a mixture of DCM and 1N aq. HCl. The organic layer was separated and the aqueous extracted twice with DCM. The combined organic extracts were dried (Na2SO4), filtered and concentrated to afford 350 mg (74%) of a cream colored solid. MS m/z (ES): 282 (M+H)+.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Methyl 3,6-dibromopyrazine-2-carboxylate, its application will become more common.

Reference:
Patent; de Vicente Fidalgo, Javier; Hermann, Johannes Cornelius; Lemoine, Remy; Li, Hongju; Lovey, Allen John; Sjogren, Eric Brian; Soth, Michael; US2011/59118; (2011); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem