Category: 16298-03-6

Synthetic Route of 16298-03-6, 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 16298-03-6 as follows.

1.5 equivalents of N-iodosuccinimide are added at room temperature to 5 g (32.7 mmol) of a methyl 3-aminopyrazine-2-carboxylate solution in 25 ml of dimethylformamide. The reaction medium is heated at 65C for 1 hour, added together with 0.5 equivalents of N-iodosuccinimide and maintained at 65C for 24 hours. After returning to room temperature, the solvent is evaporated and then the product is extracted several times with dichloromethane. The organic phases are combined, washed with 10% sodium bisulfite solution, dried on magnesium sulfate and concentrated to yield 8 g (88%) of methyl 3-amino-6-iodopyrazine-2-carboxylate in the form of a yellow solid. LCMS (EI, m/z): (M+1) 280 1H NMR: deltaH ppm (400 MHz, DMSO): 8.50 (1H, s, CHarom), 7.50 (2H, bs, NH2), 3.20 (3H, s, CH3)

According to the analysis of related databases, 16298-03-6, the application of this compound in the production field has become more and more popular.

Reference:
Patent; PIERRE FABRE MEDICAMENT; Sokoloff, Pierre; Cachoux, Frederic; EP2689778; (2014); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Related Products of 16298-03-6,Some common heterocyclic compound, 16298-03-6, name is Methyl 2-aminopyrazine-3-carboxylate, molecular formula is C6H7N3O2, 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) Methyl 2-bromo-3-pyrazine carboxylate To a stirred mixture of 12.7 g. of methyl 2-amino pyrazine 3-carboxylate and 47 ml. of 48% hydrobromic acid there is added, dropwise, 12.6 ml. of bromine keeping the temperature at 0. A solution of 14.4 g. of sodium nitrite in 60 ml. of water is then added, dropwise, at 0 and the reaction mixture stirred for 15 minutes. The reaction mixture is basified to pH 8 with sodium bicarbonate and extracted with ethyl acetate and again with chloroform. The organic layers are dried over magnesium sulfate, filtered and concentrated to a yellow oil. Recrystallization from ether-hexane yields the product, m.p. 43-45 C.

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

Reference:
Patent; Schering Corporation; US4492702; (1985); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

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. 16298-03-6, name is Methyl 2-aminopyrazine-3-carboxylate, A new synthetic method of this compound is introduced below., Quality Control of Methyl 2-aminopyrazine-3-carboxylate

Step B. Methyl 3-f [4-(dimethylamino)-1-naphthoyl]amino(at)pyrazme-2-carboxylate; Oxalyl chloride (1.70 mL, 19.5 mmol) was added to a solution of 4-(dimethylamino)- I – naphthoic acid (2.63 g, 12.2 mmol) in DCE (125 mL) at 0°C. The reaction mixture was allowed to warm to ambient temperature, heated to 85°C and stirred for 10 min. The reaction mixture was evaporated to dryness and the red residue was suspended in DCE (30 mL). The resulting suspension was added drop wise via a pump syringe over 7 hrs. to a solution of methyl 3-aminopyrazine-2-carboxylate (1.25 g, 8.16 mmol) and pyridine (4.75 mL, 58.7 mmol) in DCE (125 mL) at 80°C. The reaction mixture was stirred for 10 hrs at 80°C, cooled to ambient temperature and washed with 0.1M HCl solution. The solvent was concentrated and the product was purified on silica gel by MPLC to provide the title compound as white solid (1.24 g, 43 percent)

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 of 16298-03-6,Some common heterocyclic compound, 16298-03-6, name is Methyl 2-aminopyrazine-3-carboxylate, molecular formula is C6H7N3O2, 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.

21a) Ethyl 8-hydroxy-6-oxo-5,6-dihydropyrido [2,3-b]pyrazine-7-carboxylate A solution of 3-aminopyrazine-2-carboxylic acid methyl ester (0.596 g, 3.89 mmol) in dichloromethane (20.0 mL) was treated with triethylamine (2.65 mL, 19.40 mmol) followed by ethyl malonyl chloride (2.44 mL, 19.40 mmol). The mixture was stirred at ambient temperature overnight. The solution was concentrated in vacuo and the residue was dissolved in ethanol (15.0 mL). The solution was treated with sodium ethoxide (7.20 mL, 19.40 mmol, 21percent solution in ethanol) at ambient temperature and stirred for 2 h. The solution was dissolved with water and treated with 6N aqueous hydrochloric acid. The solid formed was filtered and washed with diethyl ether to afford the title compound as a yellow solid (0.667 g, 73percent). 1H NMR (400 MHz, DMSO-d6) delta ppm 12.3 (s, 1H), 8.68 (d, J=2.3 Hz, 1 H), 8.57 (d, J=2.3 Hz, 1 H), 4.26 (q, J=7.2 Hz, 2 H), 1.27 (t, J=7.1 Hz, 3 H). MS(ES+) m/e 235 [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 2-aminopyrazine-3-carboxylate, its application will become more common.

Adding a certain compound to certain chemical reactions, such as: 16298-03-6, name is Methyl 2-aminopyrazine-3-carboxylate, 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 16298-03-6, COA of Formula: C6H7N3O2

(iii) Methyl 3-amino-6-bromopyrazine-2-carboxylate: 3-Aminopyrazine-2-carboxylic acid methyl ester (200 g, 1.3 mol, 3B ScientificCorporation) was dissolved in AcOH (1 L). The solution was warmed to 50 °C and Br2 (312 g, 1.9 mol) added dropwise. When the addition was completed, the mixture was stirred at 50 °C for additional 3 hours. The reaction mixture was poured slowly to ice-water (4 L). The precipitate was filtered, washed with water and dried under a reduced pressure to afford the subtitle compound (iii) as a red brown solid (300g).1H-NMR (400 MHz, CDC13) delta 8.28 (s, 1H), 3.97 (s, 3H);HPLC Retention Time = 1.016min.

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, Methyl 2-aminopyrazine-3-carboxylate, other downstream synthetic routes, hurry up and to see.

16298-03-6, name is Methyl 2-aminopyrazine-3-carboxylate, belongs to pyrazines compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. Quality Control of Methyl 2-aminopyrazine-3-carboxylate

Acetonitrile (500 mL), Compound 1 (100 g, 0.653 mol), and NCS (87.2 g, .653 mol) were added to a 1 L three-necked flask and the mixture was heated to 82°C for 12 hours to complete the reaction. Acetonitrile was concentrated and removed, and recrystallized from petroleum ether/ethyl acetate to give a bright green crystalline Compound 2 (112.7 g, 92percent).

The synthetic route of 16298-03-6 has been constantly updated, and we look forward to future research findings.

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. 16298-03-6, name is Methyl 2-aminopyrazine-3-carboxylate belongs to pyrazines compound, it is a common compound, a new synthetic route is introduced below. Product Details of 16298-03-6

General procedure: Used for N-benzyl derivatives 1-8. The starting 3-aminopyrazine-2-carboxylic acid(Sigma-Aldrich, Schnelldorf, Germany; 2.2 g; 15.8 mmol) in methanol (250 mL) was cooled downto 0 C and concentrated H2SO4 (3.2 mL) was added. The reaction mixture was stirred for 48 h atrt. Subsequently the reaction mixture was poured into water (27 mL) and alkalized by NaHCO3(approx. 6.3 g) to pH = 7. The precipitate was filtered off and collected as white-brown solid toobtain methyl 3-aminopryzine-2-carboxylate [32]. Methyl 3-aminopyrazine-2-carboxylate (100 mg;0.65 mmol) in methanol (2 mL) along with substituted benzylamine (1.95 mmol; 3 equiv) and NH4Cl(10 mg; 0.19 mmol; 0.1 equiv) [33] were put into reaction tube used for microwave assisted synthesiswith a magnetic stirrer. Reaction was performed in a CEM Discover microwave reactor with a focusedfield in pressurized vials with the following settings: 130 C, 90 W and 40 min. The progress of thereaction was checked using TLC (Merck Silica 60 F254) developed by in hexane/ethyl-acetate 2:1 system.The reaction mixture was adsorbed to silica gel and purified by flash chromatography (Teledyne IscoInc.,) using silica (irregular, 40-63 m) as a stationary phase and gradient elution EtOAc in hexane0-100%, with respect to the expected lipophilicity of the product.

The synthetic route of 16298-03-6 has been constantly updated, and we look forward to future research findings.

Synthetic Route of 16298-03-6, 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. 16298-03-6, name is Methyl 2-aminopyrazine-3-carboxylate belongs to pyrazines compound, it is a common compound, a new synthetic route is introduced below.

Example 58; Step 1; A solution of bromine (10 mL, 190 mmol) in acetic acid (10 mL) was added dropwise to a solution of 1 (20 g, 130 mmol) in glacial acetic acid (100 mL) at 45 C. The resulting mixture was stirred at 25 C. for 30 min. After completion of reaction (reaction progress was monitored by TLC), the solution was diluted with water (600 mL) and then stirred at RT for another 30 min. A yellow solid precipitated out, which was filtered, washed with water and dried to afford compound 2 as yellow solid (28.5 g, 93%). MS m/z (ES): 232 (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, Methyl 2-aminopyrazine-3-carboxylate, other downstream synthetic routes, hurry up and to see.

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

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. 16298-03-6, name is Methyl 2-aminopyrazine-3-carboxylate, A new synthetic method of this compound is introduced below., Product Details of 16298-03-6

Example 1 [0069] Examples 1-4 illustrates Reaction Scheme 1 where the SUBSTITUENTS are as listed in the Table below. The compounds in bold are found in the Reaction Schemes. Compound R Substitution R2 Substitution Ib, If, Ij, 17 para F H Ic, Ig, Ik, 12 meta CF3 H Id, Ih, Il, 11 ortho Cl H Ie, Ii, Im, 13 meta F H Synthesis of Compound 17 [0070] Pyridine (2. 1 ML, 0. 025 mol) was added to methyl 3-AMINO-2-PYRAZINE carboxylate IA (3G, 0. 020 mol) in dry CHC13 (50 ML) and stirred for 5 minutes under nitrogen at room temperature. 4-fluorobenzoyl chloride (3. 5MOL, 0. 029 mol) was added slowly to the reaction mixture. The mixture was stirred for 18 hours under nitrogen. The reaction mixture was washed with 5percent Na2CO3 solution (2 X 200 ML), water (2 X 200 ML), brine (2 X 200 ML), dried (MGS04) and the solvent was removed IN VACUO. The desired product Ib was obtained by RE- CRYSTALLIZATION from ethyl acetate (1. 6G, 30percent yield). EIMS : M+ 275

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.

Related Products of 16298-03-6, These common heterocyclic compound, 16298-03-6, name is Methyl 2-aminopyrazine-3-carboxylate, 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.

Step B: Methyl 3-[(4-methyl-1-naphthoyl)amino]pyrazine-2-carboxylate; At 90 ¡ãC a solution of 4-methyl-1-naphthalenecarbonyl chloride (12 mmol) in CH2CICH2CI (20 mL) was slowly added into a solution of methyl 3-aminopyrazine-2- carboxylate (1.53 g, 10.0 mmol) and DMAP (100 mg) in CH2CICH2CI (100 mL) and pyridine (10 mL) during a period of six hours. The resulting reaction mixture was stirred at the same temperature overnight, and was then condensed, and extracted by EtOAc, washed by brine, dried over MgS04. Removal of solvents provided a crude product, which was purified by flash silica gel column using heptane/EtOAc (10: 0 to 0: 10) to give the title product as a solid (1.5 g, 47 percent) : 1H NMR (400 MHz, CDC13) No. 1H NMR (400 MHz, CD30D) 2.77 (s, 3H), 3.94 (s, 3H), 7.46 (d, J=8.0 Hz, 1H), 7.60 (m, 2H), 7.79 (d, J=8.0 Hz, 1H), 8.14 (d, J=8.0 Hz, 1H), 8.42 (m, lH), 8.50 (m, 1H), 8.64 (m,lH).

The synthetic route of 16298-03-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; AstraZeneca AB; WO2005/115986; (2005); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem