Patent ID: 8217196

Claim:
A process for producing an α-fluoro-β-amino acid of the general formula [2], comprising: reacting a β-hydroxy-α-amino acid of the general formula [1] with sulfuryl fluoride (SO 2 F 2 ) in the presence of an organic base where R 1 represents a hydrogen atom, an alkyl group or an aromatic ring group; R 2 represents an alkyl group; Ar 1 and Ar 2 each independently represent an aromatic ring group; * represents an asymmetric carbon (when R 1 is a hydrogen atom, the β-position carbon atom is not an asymmetric carbon); the alkyl group or aromatic ring group represented by R 1 , R 2 , Ar 1 and Ar 2 may have a substituent on any of carbon atoms thereof; and the aromatic ring group may be an aromatic heterocyclic group containing a hetero atom.