Selective fluorination of substituted trichloromethyl benzenes by HF in liquid phase: Preparation of fluorinated building blocks

The selective fluorination by successive Cl/F exchanges of α,α,α-trichlorotoluenes was studied. Depending on the fluorinating system, it could be possible to adapt the operating conditions in order to prepare selectively the mono, di or trichlorinated compound with a good conversion of the starting chlorinated compounds.