<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A new method for the conjugate hydrotrifluoromethylation of α, β‐unsaturated acyl‐oxazolidinones and its application in the synthesis of enantiomerically pure diastereomers of trifluorovaline, e.g. intermediates (VII) and (IX), and trifluoroisoleucine are reported.</p> </abstract>