5-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid
- Product Name
- 5-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid
- CAS No.
- 1204298-65-6
- Chemical Name
- 5-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid
- Synonyms
- Fluxapyroxad Impurity 3;5-(difluoromethyl)-1-methylpyrazole-4-carboxylic acid;5-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid;1H-Pyrazole-4-carboxylic acid, 5-(difluoroMethyl)-1-Methyl-
- CBNumber
- CB12520220
- Molecular Formula
- C6H6F2N2O2
- Formula Weight
- 176.12
- MOL File
- 1204298-65-6.mol
5-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid Property
- Boiling point:
- 315.9±42.0 °C(Predicted)
- Density
- 1.52
- storage temp.
- Sealed in dry,Room Temperature
- pka
- 3.12±0.36(Predicted)
Safety
- HS Code
- 2933199090
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- D445348
- Product name
- 5-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylicAcid
- Packaging
- 50mg
- Price
- $695
- Updated
- 2021/12/16
- Product number
- HCH0054114
- Product name
- 5-(DIFLUOROMETHYL)-1-METHYL-1H-PYRAZOLE-4-CARBOXYLIC ACID
- Purity
- 95.00%
- Packaging
- 1G
- Price
- $983.52
- Updated
- 2021/12/16
- Product number
- PC910578
- Product name
- 5-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylicacid
- Purity
- 95%
- Packaging
- 250mg
- Price
- $185
- Updated
- 2021/12/16
- Product number
- PC910578
- Product name
- 5-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylicacid
- Purity
- 95%
- Packaging
- 1g
- Price
- $470
- Updated
- 2021/12/16
- Product number
- 3543AA
- Product name
- 5-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylicacid
- Packaging
- 1g
- Price
- $490
- Updated
- 2021/12/16
5-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid Chemical Properties,Usage,Production
Uses
5-(Difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid is a useful reagent in the preparation of fluxapyroxad analogs which are anti-fungal agents.
Synthesis
851725-87-6
176969-34-9
1204298-65-6
The general procedure for the synthesis of 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid and 5-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid using ethyl 3-(dichloromethyl)-1-methyl-1H-pyrazole-4-carboxylate as a raw material was as follows: according to the method of Example 13, 200 g of 3-(dichloromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid ethyl ester (GC purity: 92.8%, 0.783 mol) was added to an autoclave with 69.50 g of 1,3-dimethyl-2-imidazolidinone hexadecyl hydrofluoric acid salt (0.160 mol). The temperature was gradually increased to 130°C to 155°C. When the system temperature reached 130 to 155°C, the reaction was maintained at this temperature range for 7 to 12 hours. Upon completion of the reaction, the pressure was released, purged with nitrogen, and the exhaust gas was treated by alkaline absorption. The reaction mixture was cooled to 60 to 80°C and the reaction solution was diluted by adding 350 g of xylene and 60 g of water. Subsequently, 125.00 g of aqueous sodium hydroxide solution with a mass concentration of 30% (mass concentration refers to the percentage of sodium hydroxide to the total mass of the solution) was slowly added dropwise and stirred at 70°C for 1 hour. The mixture was separated and the aqueous phase was acidified with concentrated hydrochloric acid at a mass concentration of 36% (mass concentration refers to the percentage of hydrogen chloride to the total mass of the concentrated hydrochloric acid) to pH=1.0. Cooled to 10-25°C, filtered and dried under vacuum to give 117.60 g of 3-(difluoromethyl)-1 -methyl-1H-pyrazole-4-carboxylic acid (Yield: 84.5%, HPLC purity: 99.1%; isomer 5 -(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid with HPLC purity of 0.05%).
References
[1] Patent: CN106467492, 2017, A. Location in patent: Paragraph 0224; 0225; 0226; 0227; 0228; 0229; 0230-0235
5-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from 5-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid manufacturers
- Product
- 5-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid 1204298-65-6
- Price
- US $6.60/KG
- Min. Order
- 1KG
- Purity
- 97%-99%
- Supply Ability
- 1kg -1000kg
- Release date
- 2020-01-02