Category: 55864-87-4

Related Products of 55864-87-4, 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. 55864-87-4 name is Ethyl 4-nitro-1H-pyrazole-3-carboxylate, 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 4-nitro-lH-pyrazole-3-carboxylic acid ethyl ester (6.40 g, 34.6 mmol) and 10% Pd/C (650 mg) in EtOH (150ml) was stirred under an atmosphere of hydrogen for 20 h. The mixture was filtered through a plug of Celite, reduced in vacuo and dried through azeotrope with toluene to afford 4-amino-lH-pyrazole-3- carboxylic acid ethyl ester as a pink solid (5.28 g, 98%). (1H NMR (400 MHz, DMSOd6) delta 12.7 (s, IH)5 7.1 (s, IH), 4.8 (s, 2H)5 4.3 (q, 2H), 1.3 (t, 3H)).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, Ethyl 4-nitro-1H-pyrazole-3-carboxylate, and friends who are interested can also refer to it.

Reference:
Patent; ASTEX THERAPEUTICS LIMITED; WO2006/70198; (2006); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Reference of 55864-87-4, These common heterocyclic compound, 55864-87-4, name is Ethyl 4-nitro-1H-pyrazole-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.

A mixture of 4-nitro-1H-pyrazole-3-carboxylic acid ethyl ester (6.40 g, 34.6 mmol) and 10% Pd/C (650 mg) in EtOH (150ml) was stirred under an atmosphere of hydrogen for 20 h. The mixture was filtered through a plug of Celite, reduced in vacuo and dried through azeotrope with toluene to afford 4-amino-1H-pyrazole-3- carboxylic acid ethyl ester as a pink solid (5.28 g, 98%). (1H NMR (400 MHz1 DMSO-d6) D 12.7 (s, 1 H), 7.1 (s, 1 H), 4.8 (s, 2H), 4.3 (q, 2H), 1.3 (t, 3H)).

The synthetic route of 55864-87-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTEX THERAPEUTICS LIMITED; WO2006/77424; (2006); A1;; ; Patent; ASTEX THERAPEUTICS LIMITED; WO2006/77425; (2006); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Related Products of 55864-87-4,Some common heterocyclic compound, 55864-87-4, name is Ethyl 4-nitro-1H-pyrazole-3-carboxylate, molecular formula is C6H7N3O4, 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 4-nitro-1H-pyrazole-3-carboxylic acid ethyl ester (6.40 g, 34.6 mmol) and 10% Pd/C (650 mg) in EtOH (150ml) was stirred under an atmosphere of hydrogen for 20 h. The mixture was filtered through a plug of Celite, reduced in vacuo and dried through azeotrope with toluene to afford 4-amino-1H-pyrazole-3- carboxylic acid ethyl ester as a pink solid (5.28 g, 98%). (1H NMR (400 MHz, DMSO-d6) delta 12. 7 (s, 1H), 7.1 (s, 1H), 4. 8 (s, 2H), 4.3 (q, 2H), 1.3 (t, 3H)).

The synthetic route of 55864-87-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTEX TECHNOLOGY LIMITED; WO2005/12256; (2005); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Electric Literature of 55864-87-4, These common heterocyclic compound, 55864-87-4, name is Ethyl 4-nitro-1H-pyrazole-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.

A mixture of 4-nitro-1H-pyrazole-3-carboxylic acid ethyl ester (6.40 g, 34.6 mmol) and 10% Pd/C (650 mg) in EtOH (150ml) was stirred under an atmosphere of hydrogen for 20 h. The mixture was filtered through a plug of Celite, reduced in vacuo and dried through azeotrope with toluene to afford 4-amino-1H-pyrazole-3- carboxylic acid ethyl ester as a pink solid (5.28 g, 98%). (1H NMR (400 MHz1 DMSO-d6) D 12.7 (s, 1 H), 7.1 (s, 1 H), 4.8 (s, 2H), 4.3 (q, 2H), 1.3 (t, 3H)).

The synthetic route of 55864-87-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTEX THERAPEUTICS LIMITED; WO2006/77424; (2006); A1;; ; Patent; ASTEX THERAPEUTICS LIMITED; WO2006/77425; (2006); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Application of 55864-87-4, 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. 55864-87-4, name is Ethyl 4-nitro-1H-pyrazole-3-carboxylate belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

Step 2. 4-Amino-lH-pyrazole-3-carboxylic acid ethyl ester ; A mixture of 4-nitro-lH-pyrazole-3-carboxylic acid ethyl ester (6.40 g, 34.6 mmol, prepared analogous to Preparation I) and 10% Pd/C (650 mg) in EtOH (150ml) was stirred under an atmosphere of hydrogen for 20 hours. The mixture was filtered through a plug of Celite, reduced in vacuo and dried through azeotrope with toluene to afford 4-amino-lH-pyrazole-3-carboxylic acid ethyl ester as a pink solid (5.28 g, 98%). (1HNMR (400 MHz, DMSOd6) delta 12.7 (s, IH), 7.1 (s, IH), 4.8 (s, 2H), 4.3 (q, 2H), 1.3 (UH)).

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, Ethyl 4-nitro-1H-pyrazole-3-carboxylate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ASTEX THERAPEUTICS LIMITED; NOVARTIS AG; WO2008/7123; (2008); A2;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

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. 55864-87-4, name is Ethyl 4-nitro-1H-pyrazole-3-carboxylate, A new synthetic method of this compound is introduced below., Recommanded Product: 55864-87-4

a) Ethyl 4-NITRO-LH-PYRAZOLE-3-CARBOXYLATE (741 mg, 4 mmol) was heated at 90C with a concentrated solution of aqueous ammonia (28%, 20 ML) in a sealed vessel for 3 hours. The mixture was evaporated and the residue was triturated with diethyl ether to give 4-NITRO-LH- pyrazole-3-carboxamide (0.54 g, 86% yield) as a white solid: 1H-NMR (DMSO d6) : 8. 70 (s, 1H), 8.06 (s, 1H), 7. 83 (s, 1H); MS (+VEESI) : 157.13 (M+H) +.

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; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2004/94410; (2004); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Application of 55864-87-4, A common heterocyclic compound, 55864-87-4, name is Ethyl 4-nitro-1H-pyrazole-3-carboxylate, molecular formula is C6H7N3O4, 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 2. 4-Amino-1H-pyrazole-3-carboxylic acid ethyl ester EPO A mixture of 4-nitro-1H-pyrazole-3-carboxylic acid ethyl ester (6.40 g, 34.6 mmol) and 10% Pd/C (650 mg) in EtOH (150ml) was stirred under an atmosphere of hydrogen for 20 hours. The mixture was filtered through a plug of Celite, reduced in vacuo and dried through azeotrope with toluene to afford 4-amino-1H-pyrazole- 3-carboxylic acid ethyl ester as a pink solid (5.28 g, 98%). (1H NMR (400 MHz, DMSO-d6) delta 12.7 (s, IH), 7.1 (s, IH)5 4.8 (s, 2H), 4.3 (q, 2H), 1.3 (t, 3H)).

The synthetic route of 55864-87-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTEX THERAPEUTICS LIMITED; WO2006/77414; (2006); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Synthetic Route of 55864-87-4, 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. 55864-87-4 name is Ethyl 4-nitro-1H-pyrazole-3-carboxylate, 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 4-nitro-lH-pyrazole-3-carboxylic acid ethyl ester (6.40 g, 34.6 mmol) and 10% Pd/C (650 mg) in EtOH (150ml) was stirred under an atmosphere of hydrogen for 20 h. The mixture was filtered through a plug of Celite, reduced in vacuo and dried through azeotrope with toluene to afford 4-amino-lH-pyrazole-3- carboxylic acid ethyl ester as a pink solid (5.28 g, 98%). (1H NMR (400 MHz, DMSOd6) delta 12.7 (s, IH)5 7.1 (s, IH), 4.8 (s, 2H)5 4.3 (q, 2H), 1.3 (t, 3H)).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, Ethyl 4-nitro-1H-pyrazole-3-carboxylate, and friends who are interested can also refer to it.

Reference:
Patent; ASTEX THERAPEUTICS LIMITED; WO2006/70198; (2006); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Adding a certain compound to certain chemical reactions, such as: 55864-87-4, name is Ethyl 4-nitro-1H-pyrazole-3-carboxylate, belongs to pyrazoles-derivatives 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 55864-87-4, Formula: C6H7N3O4

To a mixture of compound A32 (12.4 g, 66.9 mmol, 1 eq) and K2CO3 (23.1 g, 167 mmol, 2.5 eq) in MeCN (120 mL) was added Dl-1 (28.5 g, 167 mmol, 16.4 mL, 2.5 eq) and the resulting mixture was heated to 60-70C for 16 hours to afford a white mixture. TLC showed two new spots. The mixture was partitioned between EtOAc (100 mL) and H20 (100 mL). The aqueous phase was extracted with EtOAc (100 mL x 2). The combined organic extract was dried over anhydrous Na2S04, filtered and concentrated under reduced pressure to give crude product. The crude product was purified by combi flash (PE/EtOAc = 1/0 to 4/1 to 3/1) to afford compound A33 (9.5 g, 62.4% yield) as a yellow oil.

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.

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. 55864-87-4, name is Ethyl 4-nitro-1H-pyrazole-3-carboxylate, A new synthetic method of this compound is introduced below., Computed Properties of C6H7N3O4

Step 2. Preparation of 4-nitro-1-(2-trimethylsilanyl-ethoxymethyl)-1H-pyrazole-3-carboxylic acid, ethyl ester and 4-nitro-2-(2-trimethylsilanyl-ethoxymethyl)-2H-pyrazole-3-carboxylic acid, ethyl ester. To a 0 C. solution of 4-nitro-1H-pyrazole-3-carboxylic acid ethyl ester (6.4 g, 34.58 mmol) in dimethylformamide (80 mL) was added sodium hydride (2.07 g, 1.5 eq), and the resulting mixture was stirred from 0 C. to room temperature for one hour. To this mixture was added 2-(trimethylsilyl)ethoxy-methyl chloride (Aldrich) (9.17 mL, 1.5 eq), and the resulting mixture was stirred at room temperature for 2 days. The reaction was monitored by TLC. The reaction mixture was diluted with ethyl acetate (300 mL) and water (100 mL). the organic layer was separated, washed with water (6*100 mL) and brine (1*100 mL), dried over magnesium sulfate, filtered and concentrated to give 10 g of the crude product. Purification by column chromatography using 5% ethyl acetate in hexanes afforded 4-nitro-2-(2-trimethylsilanyl-ethoxymethyl)-2H-pyrazole-3-carboxylic acid, ethyl ester (3.82 g) as a colorless oil and 4-nitro-1-(2-trimethylsilanyl-ethoxymethyl)-1H-pyrazole-3-carboxylic acid, ethyl ester (4.055 g) as a light tan oil. (M-H)+=314.

The synthetic route of 55864-87-4 has been constantly updated, and we look forward to future research findings.