1H-Pyrazole-4-carboxylic acid, 1-(difluoromethyl)-, ethyl ester

Base Information

• Chemical Name: 1H-Pyrazole-4-carboxylic acid, 1-(difluoromethyl)-, ethyl ester
• CAS No.: 129819-40-5
• Molecular Formula: C7H8F2N2O2
• Molecular Weight: 190.14700
• Mol file: 129819-40-5.mol

Synonyms:ethyl 1-difluoromethylpyrazole-4-carboxylate;ethyl 1-difluoromethyl-1H-pyrazole-4-carboxylate;1-Difluoromethyl-1H-pyrazole-4-carboxylic acid ethyl ester;

Chemical Property of 1H-Pyrazole-4-carboxylic acid, 1-(difluoromethyl)-, ethyl ester

Chemical Property:

• Melting Point: 31 - 32 °C
• PSA: 44.12000
• LogP: 1.45490

Purity/Quality:

99% ^*data from raw suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

• Uses: Ethyl 1-(Difluoromethyl)-1H-pyrazole-4-carboxylate is used in the preparation of 1,4,6-triaza-1H-indene compounds as colony stimulating factor 1 receptor modulators.

Technology Process of 1H-Pyrazole-4-carboxylic acid, 1-(difluoromethyl)-, ethyl ester

There total 4 articles about 1H-Pyrazole-4-carboxylic acid, 1-(difluoromethyl)-, ethyl ester which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 100.0%

4-ethoxycarbonylpyrazole (37622-90-5) + sodium chlorodifluoroacetate (1895-39-2) → ethyl 1-(difluoromethyl)pyrazole-4-carboxylate (129819-40-5)

Guidance literature:

With sodium hydrogencarbonate; In N,N-dimethyl-formamide; at 100 ℃;

Reference yield: 95.0%

4-ethoxycarbonylpyrazole (37622-90-5) + Chlorodifluoromethane (75-45-6) → ethyl 1-(difluoromethyl)pyrazole-4-carboxylate (129819-40-5)

Guidance literature:

With potassium carbonate; In N,N-dimethyl-formamide; at 90 ℃; for 2h;

Reference yield: 60.0%

4-ethoxycarbonylpyrazole (37622-90-5) + diethyl (bromodifluoromethyl)phosphonate (65094-22-6) → ethyl 1-(difluoromethyl)pyrazole-4-carboxylate (129819-40-5)

Guidance literature:

With potassium fluoride; In acetonitrile; at 20 ℃; for 12h; Schlenk technique; Inert atmosphere; Green chemistry;

DOI:10.1016/j.tetlet.2018.06.003

upstream raw materials:

4-ethoxycarbonylpyrazole

Chlorodifluoromethane

dibromodifluoromethane

sodium chlorodifluoroacetate

Downstream raw materials:

1H-pyrazole-4-carbohydrazide

Refernces

• 1、 -. "[1,2,4]TRIAZOLO[1,5-C]QUINAZOLIN-5-AMINES". Page/Page column 343-344. . Retrieved 2021/02/19.
• 2、 -. "Herbicide compositions". Page/Page column 37. . Retrieved 2010/02/14.