| abstract |
(57) [Summary] (with correction) [PROBLEMS] To provide a method for producing an optically active α-hydroxy-β-aminocarboxylic acid derivative. A compound (4) is halogenated, reduced, The compound (3), the compound (1), and the compound (2) are efficiently produced by sequentially performing the hydrolysis. (In the formula, R 1 represents aralkyl or the like, X 1 , X 2 , and X 3 represent a halogen atom, and P 1 and P 2 independently represent a hydrogen atom or an amino-protecting group.) |