231285-86-2

Basic information

• Product Name: Ethyl 1-methyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate
• Synonyms: Ethyl 1-methyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate;4-(Ethoxycarbonyl)-1-methyl-5-(trifluoromethyl)-1H-pyrazole;Ethyl 1-methyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate 97%;Ethyl 2-methyl-3-(trifluoromethyl)-1H-pyrazole-4-carboxylate;1-Methyl-5-trifluoromethylpyrazole-4-carboxylic acid ethyl ester
• CAS NO: 231285-86-2
• Molecular Formula: C₈H₉F₃N₂O₂
• Molecular Weight: 222.1644696
• Product Categories: Building Blocks;Pyrazole
• Mol File: 231285-86-2.mol
• Article Data: 10

Chemical Properties

• Appearance: /
• Storage Temp.: Sealed in dry,Room Temperature
• CAS DataBase Reference: Ethyl 1-methyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate(CAS DataBase Reference)
• NIST Chemistry Reference: Ethyl 1-methyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate(231285-86-2)
• EPA Substance Registry System: Ethyl 1-methyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate(231285-86-2)

Safety Data

• Statements: 36/37/38
• Safety Statements: 26-36/37/39
• Hazardous Substances Data: 231285-86-2(Hazardous Substances Data)

Usage

Chemical Properties

White solid

Upstream product

• 105486-72-4 5-bromo-1-methyl-1H-pyrazole-4-carboxylic acid ethyl ester 
• 50-00-0 formaldehyd 
• 372-31-6 ethyl 4,4,4-trifluoroacetoacetate 
• 60-34-4 methylhydrazine 
• 571-55-1 ethyl 2-(ethoxymethylidene)-4,4,4-trifluoro-3-oxobutanoate 
• 1067233-79-7 4-trifluoromethyl-N-methylsydnone 
• 623-47-2 propynoic acid ethyl ester 

Downstream Products

• 119083-00-0 1-methyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylic acid 
• 676236-50-3 (1-methyl-5-(trifluoromethyl)-1H-pyrazol-4-yl)methanol 
• 111493-74-4 ethyl 3-(trifluoromethyl)-1-methyl-1H-pyrazole-4-carboxylate 
• 113100-53-1 1-methyl-3-(trifluoromethyl)-1H-pyrazole-4-carboxylic acid 

Relevant articles and documents

Mechanistic Insight into Copper-Mediated Trifluoromethylation of Aryl Halides: The Role of CuI

The synthesis, characterization, and reactivity of key intermediates [Cu(CF3)(X)]-Q+ (X = CF3 or I, Q = PPh4) in copper-mediated trifluoromethylation of aryl halides were studied. Qualitative and quantitative studies showed [Cu(CF3)2]-Q+ and [Cu(CF3)(I)]-Q+ were not highly reactive. Instead, a much more reactive species, ligandless [CuCF3] or DMF-ligated species [(DMF)CuCF3], was generated in the presence of excess CuI. On the basis of these results, a general mechanistic map for CuI-promoted trifluoromethylation of aryl halides was proposed. Furthermore, on the basis of this mechanistic understanding, a HOAc-promoted protocol for trifluoromethylation of aryl halides with [Ph4P]+[Cu(CF3)2]- was developed.

1 - Substituted - 5 - trifluoromethyl - 4 - the pyrazole is joint 1, 3, 4 - oxadiazole thioether or sulfones derivatives and use thereof

The invention discloses a kind of 1-substituted-5-trifluoromethyl-4-pyrazol-1,3,4-oxadiazole thioether or sulfone derivatives and application of the derivatives. The derivatives have the structures represented by general formulae A and B shown in the specification. 1-substituted-5-trifluoromethyl-4-pyrazol-1,3,4-oxadiazole compounds are synthesized from ethyl trifluoroacetoacetate by the following five reactions: esterification, ring closure, hydrazinolysis, ring closure and substitution. The compounds have certain inhibition effects to plant bacterial diseases or plant fungous diseases and can be used as pesticides and pesticide additives for preventing and controlling the plant bacterial diseases or the plant fungous diseases.

METHOD FOR PRODUCING 1-SUBSTITUTED-3-FLUOROALKYLPYRAZOLE-4-CARBOXYLIC ACID ESTER

The present invention is a method for producing a 1-substituted-3-fluoroalkylpyrazole-4-caroxylic acid ester, the method comprising a step of adding, to a first reaction liquid containing an alkyl hydrazine and a first organic solvent, a second reaction liquid containing an acyl acetic acid ester derivative and a second organic solvent in 0.5 to 30 hours to react the first reaction liquid with the second reaction liquid at a reaction temperature of -5 to 80°C under stirring in the absence of a base and an acid, wherein the first organic solvent and the second organic solvent are each at least any one of benzene, toluene, xylene, chlorobenzene, dichlorobenzene, ethyl acetate, butyl acetate, and dimethyl carbonate, a total mass of the first organic solvent and the second organic solvent is 1 to 60 times a mass of the acyl acetic acid ester derivative, and an amount of the first organic solvent in a total amount of the first organic solvent and the second organic solvent is 40 to 95% by mass.