A highly stereoselective enantiodivergent synthesis of non-racemic 3,3,3-tr
ifluoroalanine 7 is reported. The methodology is based on the reduction, by
9-BBN or DIBAH, of the chiral sulfinimine 3 derived from ethyl trifluoropy
ruvate, followed by acidic hydrolysis of the resulting diastereomeric sulfi
namides 4 and 5.