Category: 4744-50-7

Related Products of 4744-50-7, 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. 4744-50-7, name is 2,3-Pyrazinecarboxylic anhydride belongs to Pyrazines compound, it is a common compound, a new synthetic route is introduced below.

General procedure: A solution of substituted benzyl amine (10 mmol) and an acid anhydride (10 mmol) in glacial acetic acid (15mL) was heated under reflux for 4h. After the evaporation of the reaction mixture to dryness under reduced pressure, the residue was neutralised by a solution of sodium bicarbonate (4%) until effervescence ceased. The precipitate obtained was washed with water, dried and re-crystallised from an appropriate solvent.

The synthetic route of 2,3-Pyrazinecarboxylic anhydride has been constantly updated, and we look forward to future research findings.

Reference:
Article; Alanazi, Amer M.; El-Azab, Adel S.; Al-Suwaidan, Ibrahim A.; Eltahir, Kamal Eldin H.; Asiri, Yousif A.; Abdel-Aziz, Naglaa I.; Abdel-Aziz, Alaa A.-M.; European Journal of Medicinal Chemistry; vol. 92; (2015); p. 115 – 123;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Reference of 4744-50-7, These common heterocyclic compound, 4744-50-7, name is 2,3-Pyrazinecarboxylic anhydride, 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: Pyrazine-2,3-dicarboxylic anhydride (1.0 g, 6.7 mmol) was dissolved in tetrahydrofuran (40 mL)in an Erlenmeyer flask and the corresponding substituted aniline (6.7 mmol, 1 equiv.) was added in one dose. The reaction mixture was stirred for 1 hour at laboratory temperature. Water (30 mL) was added into the mixture followed by the saturated aqueous solution of NaHCO3 until pH 6 to form thecorresponding 3-(phenylcarbamoyl)pyrazine-2-carboxylic acid 1-18. Obtained crystals were filtered off and washed with water. The progress of the procedure was monitored by TLC eluted with thesystem water/butanol/acetic acid 5:4:1.

Statistics shows that 2,3-Pyrazinecarboxylic anhydride is playing an increasingly important role. we look forward to future research findings about 4744-50-7.

Reference:
Article; Semelkova, Lucia; Jano?cova, Petra; Fernandes, Carlos; Bouz, Ghada; Jand?Ourek, Ond?ej; Kone?na, Klara; Paterova, Pavla; Navratilova, Lucie; Kune?, Ji?i; Dole?al, Martin; Zitko, Jan; Molecules; vol. 22; 9; (2017);,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Application of 4744-50-7,Some common heterocyclic compound, 4744-50-7, name is 2,3-Pyrazinecarboxylic anhydride, molecular formula is C6H2N2O3, 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.

5.1.26 13-[(Methyloxy)carbonyl]-2-pyrazinecarboxylic acid (35) 16 2,3-Pyrazinedicarboxylic anhydride (34) (15.3 g, 102 mmol) was dissolved in methanol (100 mL) and the solution was stood at room temperature for 3 days. The solvent was removed under reduced pressure and the residue was crystallised from ethyl acetate to give 35 (13.85 g, 75%): MS ES+ve m/z 183 (M+H)+; 1H NMR delta (DMSO-d6) 8.91 (1H, d, J 2 Hz), 8.90 (1H, d, J 2 Hz), 3.90 (3H, s).

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

Reference:
Article; Procopiou, Panayiotis A.; Browning, Christopher; Gore, Paul M.; Lynn, Sean M.; Richards, Stephen A.; Slack, Robert J.; Sollis, Steven L.; Bioorganic and Medicinal Chemistry; vol. 20; 20; (2012); p. 6097 – 6108;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Related Products of 4744-50-7, 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 4744-50-7 as follows.

17a. 3-(N-(2-Methyl-2-sulfanylpropyl)carbamoyl)pyrazine-2-carboxylic acid A suspension of 2-mercapto-2-methyl-1-propylamine hydrochloride (1.14 g, 8 mmol) in dichloromethane (15 mL) was cooled to 0 C. and then treated with triethylamine (1.23 mL, 0.9 g, 8.9 mmol) followed by furano(3,4-b)pyrazine-5,7-dione (1.2 g, 8 mmol). The reaction mixture was stirred at 0 C. for 40 minutes then at room temperature for 1 hour. The solvent was removed by evaporation and the residue triturated with hexane/ether to give the title compound (1.2 g, 59%). Mp 141-144 C. 1H NMR (300 MHz, DMSO-d6) delta8.83-8.86 (m, 3H), 3.45 (d, J=6.4 Hz, 2H), 2.87 (s, 1H), 1.33 (s, 6H).

According to the analysis of related databases, 4744-50-7, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Fang, Xinqin; Garvey, David S.; Gaston, Ricky D.; Lin, Chia-En; Ranatunga, Ramani R.; Richardson, Stewart K.; Wang, Tiansheng; Wang, Weiheng; Wey, Shiow-Jyi; US2003/203915; (2003); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Adding a certain compound to certain chemical reactions, such as: 4744-50-7, name is 2,3-Pyrazinecarboxylic anhydride, 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 4744-50-7, SDS of cas: 4744-50-7

6-(7-Methoxy-1,8-naphthyridin-2-yl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazine, m.p. 296 C., can be prepared by reacting pyrazine-2,3-dicarboxylic acid anhydride with 2-amino-7-methoxy-1,8-napthyridine in acetic acid in the presence of acetic anhydride at the reflux temperature.

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-Pyrazinecarboxylic anhydride, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Rhone-Poulenc S.A.; US4016274; (1977); A;,
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 4744-50-7 as follows. Application In Synthesis of 2,3-Pyrazinecarboxylic anhydride

General procedure: Sodium dodecyl sulfate (SDS, 6 mmol) was added to a stirred heterogeneous suspension of amine (5 mmol) in water (20 mL) until a homogeneous solution was formed, (in case of turbidity, the mixture was warmed to obtain a clear solution). Anhydride 17(5 mmol) dissolved in acetonitrile (5 mL) was added to this solution in one lot. After stirring for 1 h at room temperature, the acetonitrile was evaporated and the product precipitated from the aqueous layer. To the aqueous solution containing precipitate, solid sodium hydrogen carbonate was added pinch-wise until the effervescence ceased and the pH was 6.0. The remaining precipitated product was filtered, washed with water (20 mL), dried in a vacuum desiccator. In cases where the product did not precipitate, the reaction mixturewas extracted with ethyl acetate (2 25 mL). The combined organic extracts were dried with anhydrous Na2SO4 and the solvent was removed in a rotary evaporator under reduced pressure to yield the pure product.

According to the analysis of related databases, 4744-50-7, the application of this compound in the production field has become more and more popular.

Reference:
Article; Saudi, Milind; Zmurko, Joanna; Kaptein, Suzanne; Rozenski, Jef; Neyts, Johan; Van Aerschot, Arthur; European Journal of Medicinal Chemistry; vol. 87; (2014); p. 529 – 539;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Synthetic Route of 4744-50-7, A common heterocyclic compound, 4744-50-7, name is 2,3-Pyrazinecarboxylic anhydride, molecular formula is C6H2N2O3, 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.

Example-1; Preparation of 3-(5-chloropyridin-2-yI)-carbamoylpyrazine-2-carboxylic acid2-Amino-5-chloro pyridine (171.2 g) was suspended in 800 ml toluene and mixture was heated to 48-52 C. Pyrazine-2,3-dicarboxylic acid anhydride (100 g) was added to the suspension at same temperature. The resulting reaction mixture was stirred for 2 hrs at 48-52 C. The reaction slurry was cooled to 20-25 C and stirred for 30 min. The solid was filtered and washed with 100 ml toluene. The filtered solid was added to a mixture of 1000 ml water and 100 ml cone. HCl at 10-15C. The solid was stirred for 60 min at 10-15 C and filtered. The solid was slurred in 400 ml water, filtered and washed with 100 ml water.The solid was dried at 60-70 C to yield 17O g of title compound.

The synthetic route of 4744-50-7 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MATRIX LABORATORIES LTD; WO2008/126105; (2008); A2;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

4744-50-7, 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. 4744-50-7, name is 2,3-Pyrazinecarboxylic anhydride, This compound has unique chemical properties. The synthetic route is as follows.

General procedure: Pyrazine-2,3-dicarboxylic anhydride (1.0 g, 6.7 mmol) was dissolved in tetrahydrofuran (40 mL)in an Erlenmeyer flask and the corresponding substituted aniline (6.7 mmol, 1 equiv.) was added in one dose. The reaction mixture was stirred for 1 hour at laboratory temperature. Water (30 mL) was added into the mixture followed by the saturated aqueous solution of NaHCO3 until pH 6 to form thecorresponding 3-(phenylcarbamoyl)pyrazine-2-carboxylic acid 1-18. Obtained crystals were filtered off and washed with water. The progress of the procedure was monitored by TLC eluted with thesystem water/butanol/acetic acid 5:4:1.

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Reference:
Article; Semelkova, Lucia; Jano?cova, Petra; Fernandes, Carlos; Bouz, Ghada; Jand?Ourek, Ond?ej; Kone?na, Klara; Paterova, Pavla; Navratilova, Lucie; Kune?, Ji?i; Dole?al, Martin; Zitko, Jan; Molecules; vol. 22; 9; (2017);,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem