Ethyl trifluoropyruvate
[CAS# 13081-18-0]

Identification

• Classification: Chemical reagent >> Organic reagent >> Ester >> Ethyl ester compound
• Name: Ethyl trifluoropyruvate
• Synonyms: Ethyl 2-oxo-3,3,3-trifluoropropionate; Ethyl 3,3,3-trifluoro-2-oxopropanoate; Trifluoropyruvic acid ethyl ester
• Molecular Formula: C₅H₅F₃O₃
• Molecular Weight: 170.09
• CAS Registry Number: 13081-18-0
• EC Number: 603-440-7
• SMILES: CCOC(=O)C(=O)C(F)(F)F

Properties

• Density: 1.3±0.1 g/cm³, Calc.^*,1.283 g/mL (Expl.)
• Index of Refraction: 1.349, Calc.^*
• Boiling Point: 88.1±40.0 ºC (760 mmHg), Calc.^*, 95-98 ºC (Expl.)
• Flash Point: 8.1±22.2 ºC, Calc.^*, 31 ºC (Expl.)

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software.

Safety Data

• Hazard Symbols: GHS02;GHS07 Warning
• Hazard Statements: H226-H302-H315-H319-H335
• Precautionary Statements: P210-P233-P240-P241-P242-P243-P261-P264-P264+P265-P270-P271-P280-P301+P317-P302+P352-P303+P361+P353-P304+P340-P305+P351+P338-P319-P321-P330-P332+P317-P337+P317-P362+P364-P370+P378-P403+P233-P403+P235-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Flammable liquids	Flam. Liq.	3	H226
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335
Acute toxicity	Acute Tox.	4	H302
Eye irritation	Eye Irrit.	2A	H319

• Transport Information: UN 3272

Discovory and Applicatios

Ethyl trifluoropyruvate is an organic compound with the molecular formula C₅H₅F₃O₃. It belongs to the class of trifluoromethylated α-keto esters, characterized by the presence of both a trifluoromethyl (-CF₃) group and a pyruvate (-CO-COOEt) functional group. This structural arrangement significantly influences its chemical reactivity and properties compared to non-fluorinated pyruvate esters.

The synthesis of ethyl trifluoropyruvate has been documented in the literature as part of the broader exploration of trifluoromethylated compounds, which have been of interest since the mid-20th century due to their role in pharmaceuticals, agrochemicals, and material sciences. One common method of synthesis involves the reaction of trifluoroacetic acid derivatives with ethyl oxalate or similar precursors, often under controlled conditions using strong bases or catalytic systems. Additionally, fluorinated acylation reagents can facilitate its formation through selective carbonyl activation and esterification.

Ethyl trifluoropyruvate exhibits unique reactivity due to the strong electron-withdrawing effect of the trifluoromethyl group, which influences both the carbonyl reactivity and the acidity of adjacent protons. The presence of the α-keto ester moiety enables its participation in a variety of organic transformations, including nucleophilic additions, condensations, and enolate chemistry. These characteristics make it a useful reagent in asymmetric synthesis, where it serves as a precursor for chiral building blocks in complex molecule construction.

The compound finds applications in the pharmaceutical industry, particularly in the development of fluorinated drugs. The incorporation of trifluoromethyl groups in bioactive molecules is a well-established strategy to enhance metabolic stability, lipophilicity, and binding affinity to biological targets. Ethyl trifluoropyruvate serves as a versatile intermediate in the synthesis of fluorinated heterocycles, amino acid derivatives, and other pharmacologically relevant scaffolds.

In agrochemical research, ethyl trifluoropyruvate is used in the synthesis of fluorinated pesticides and herbicides. The presence of fluorine in these compounds can improve their stability, bioavailability, and overall efficacy. The α-keto ester functionality allows for selective modifications, enabling the design of compounds with tailored biological activity.

The compound is also employed in materials science, where fluorinated organic compounds contribute to the development of high-performance polymers, coatings, and advanced materials with enhanced chemical resistance and thermal stability. Its reactivity in polymerization and functionalization reactions supports its use in the synthesis of specialized fluorinated materials.

Ethyl trifluoropyruvate requires careful handling due to its reactive nature. It should be stored in tightly sealed containers to prevent hydrolysis and decomposition. As with other fluorinated carbonyl compounds, appropriate safety precautions, including the use of gloves, eye protection, and well-ventilated working environments, are recommended. Exposure to moisture and strong nucleophiles should be minimized to preserve its stability.

Research into the applications of ethyl trifluoropyruvate continues as new methodologies for fluorine incorporation in medicinal and materials chemistry are developed. Its established role as a fluorinated building block in organic synthesis ensures its ongoing relevance in industrial and academic research.

References

2024. Synthesis and spatial structure of 3,7-dihydroxy-7-(trifluoromethyl)hexahydropyrrolo[1,2-a]pyrimidines. Russian Chemical Bulletin, 73(8).
DOI: 10.1007/s11172-024-4350-3

2023. Multicomponent Domino Cyclization of Ethyl Trifluoropyruvate with Methyl Ketones and Amino Alcohols as A New Way to γ-Lactam Annulated Oxazacycles. Molecules (Basel, Switzerland), 28(4).
DOI: 10.3390/molecules28041983

2022. Copper-catalyzed [4+2] oxidative annulation of α,β-unsaturated ketoxime acetates with ethyl trifluoropyruvate. Chemical communications (Cambridge, England), 58(49).
DOI: 10.1039/d2cc01573k