m-(Trifluoromethyl)phenylacetic Acid: A Fluorine-Containing Carboxylic Acid with High Stability and Strong Lipophilicity
m-(Trifluoromethyl)phenylacetic acid is an important fluorine-containing organic synthesis intermediate. Its chemical formula is C₉H₇F₃O₂, and its CAS number is 351-35-9.
Product Properties: At room temperature, this compound appears as a white to pale yellow crystalline powder. Its molecular weight is approximately 204.15, density about 1.4 g/cm³, melting point 76–79 °C, and boiling point 251.8 °C (under normal pressure). It belongs to the class of fluorine-containing carboxylic acids, with a molecular structure containing a highly electronegative trifluoromethyl group and a carboxylic acid functional group, exhibiting relatively strong acidity. The introduction of the trifluoromethyl group endows the compound with high chemical stability and lipophilicity, giving it unique reactivity and selectivity in organic synthesis. This compound is readily soluble in common organic solvents such as alcohols, ethers, and esters, and performs well in organic transformations including esterification and acylation. Commercially available products typically have a purity of 98%–99% or higher, with packaging available from a few grams to metric tons. For storage, it should be kept sealed, protected from light, at room temperature in a cool, dry environment, avoiding contact with oxidizing agents and strong bases.
Main Applications: The most important application of m-(trifluoromethyl)phenylacetic acid is as a key intermediate in the synthesis of novel, efficient, and low‑toxicity agricultural pesticides. For example, it is a critical intermediate in the production of trifloxystrobin, a strobilurin fungicide widely used for disease control in cereals, fruits, and vegetables. Additionally, m-(trifluoromethyl)phenylacetic acid serves as an important raw material in the synthesis of several high‑efficiency pesticides such as triflumezopyrim, which is used for controlling rice planthoppers and leafhoppers, offering significant value in agricultural production. In the field of materials science, this compound can be used as a functional monomer for polymer synthesis and modification, as well as in the preparation of sensors and semiconductor materials. Furthermore, in basic chemical research, m-(trifluoromethyl)phenylacetic acid can be used as a reactant in studies of ligand‑accelerated C–H bond activation reactions, exploring new synthetic pathways for fluorine‑containing organic molecules.
Conclusion: Overall, thanks to the high stability, good lipophilicity, and reaction selectivity imparted by its fluorine‑containing structure, m-(trifluoromethyl)phenylacetic acid plays an irreplaceable role in pesticide synthesis, materials science, and organic chemistry research.