Isopropyl trifluoroacetate
[CAS# 400-38-4]

Identification

• Classification: Chemical reagent >> Organic reagent >> Ester >> Propyl esters
• Name: Isopropyl trifluoroacetate
• Synonyms: propan-2-yl 2,2,2-trifluoroacetate
• Molecular Formula: C₅H₇F₃O₂
• Molecular Weight: 156.10
• CAS Registry Number: 400-38-4
• EC Number: 206-922-1
• SMILES: CC(C)OC(=O)C(F)(F)F

Properties

• Solubility: Slightly soluble (7.8 g/L) (25 ºC), Calc.^*
• Density: 1.077 g/cm³ (25 ºC)^**
• Boiling point: 73.5 ºC^**
• Refractive index: 1.3165 (589.3 nm 24 ºC)^**
• Flash point: -8.9±0.0 ºC, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2014 ACD/Labs)

^** Norton, T. R.; Journal of the American Chemical Society 1950, V72, P3527-8.

Safety Data

• Hazard Symbols: GHS02;GHS05;GHS07 DangerGHS02
• Hazard Statements: H225-H314-H335
• Precautionary Statements: P210-P233-P240-P241-P242-P243-P260-P261-P264-P271-P280-P301+P330+P331-P302+P361+P354-P303+P361+P353-P304+P340-P305+P354+P338-P316-P319-P321-P363-P370+P378-P403+P233-P403+P235-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Flammable liquids	Flam. Liq.	2	H225
Skin corrosion	Skin Corr.	1B	H314
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2	H319
Serious eye damage	Eye Dam.	1	H318
Skin irritation	Skin Irrit.	2	H315

Discovory and Applicatios

Isopropyl trifluoroacetate is a fluorinated ester with the molecular formula CF₃COOCH(CH₃)₂. It is the isopropyl ester of trifluoroacetic acid and was developed as part of the mid-20th century expansion of organofluorine chemistry, when chemists sought to explore the unique properties of fluorinated esters and their utility in synthesis. The trifluoromethyl group imparts strong electron-withdrawing character, which increases the electrophilicity of the carbonyl carbon and alters the chemical reactivity compared with non-fluorinated esters. The isopropyl ester provides steric bulk that affects hydrolysis rates and can influence selectivity in subsequent reactions.

The primary applications of isopropyl trifluoroacetate are in organic synthesis and chemical research. It serves as a source of the trifluoroacetyl group for the introduction of trifluoromethylated acyl moieties into target molecules. This ability is particularly valuable in pharmaceutical and agrochemical chemistry, where trifluoromethyl groups improve metabolic stability, lipophilicity, and biological activity of derivatives. The ester can participate in nucleophilic acyl substitution, transesterification, and condensation reactions, allowing chemists to incorporate trifluoroacetyl groups into a variety of organic scaffolds.

In medicinal chemistry, isopropyl trifluoroacetate is used as an intermediate in the synthesis of fluorinated drug candidates. Trifluoroacetylation of amines, alcohols, and other nucleophiles can yield derivatives with enhanced pharmacokinetic properties. The ester functionality allows controlled reactions under mild conditions, minimizing side reactions and providing access to structurally diverse compounds. Such fluorinated intermediates are widely explored for their potential in central nervous system agents, enzyme inhibitors, and anti-inflammatory drugs.

In materials science, fluorinated esters like isopropyl trifluoroacetate are employed as reagents in the synthesis of specialty polymers, coatings, and fine chemicals. The trifluoromethyl group imparts chemical resistance, thermal stability, and hydrophobicity, which are critical for high-performance applications. The ester’s reactivity enables selective incorporation into polymer backbones or side chains, contributing to tailored material properties.

Analytical chemistry also benefits from the use of isopropyl trifluoroacetate. It is sometimes used as a derivatization reagent in gas chromatography and mass spectrometry, where trifluoroacetylation improves the volatility and detectability of polar compounds. This facilitates the analysis of complex mixtures, including amino acids, peptides, and other biologically relevant molecules.

The discovery and application of isopropyl trifluoroacetate reflect the broader significance of trifluoromethylated esters in modern chemistry. Its combination of chemical stability, reactivity, and electron-withdrawing properties has made it a valuable intermediate for synthesis, supporting advances in pharmaceuticals, agrochemicals, materials science, and analytical chemistry. The compound exemplifies how fluorination can enhance the functionality and utility of simple ester molecules in research and industrial applications.

References

2020. B3LYP, M06 and B3PW91 DFT assignment of nd8 metal-bis-(N-heterocyclic carbene) complexes. Journal of Molecular Modeling, 26(8).
DOI: 10.1007/s00894-020-04500-7

2014. Addition of trifluoroacetic acid to (R)-(+)-Limonene in the presence of Mo2(OOCCF3)4. Russian Journal of General Chemistry, 84(12).
DOI: 10.1134/s1070363214120196

2014. Direct catalytic oxidation of lower alkanes in ionic liquid media. Petroleum Chemistry, 54(5).
DOI: 10.1134/s096554411405003x