Synthesis of optically pure (R)- and (S)-α-trifluoromethyl-alanine

(+)- And (−)-(S)-3,3,3-trifluoro-2-methyl alanine was synthesized from (+)-(R)-methyl-p-tolyl sulphoxide and N-alkoxycarbonylimino derivatives of methyl 3,3,3-trifluoropyruvate.