FIELD: medicine, pharmaceutics.
SUBSTANCE: invention refers to a method for preparing a compound of formula 
(I) or its salt, wherein R1 and R1' are independently hydrogen or a protective group for amino group, while R2 is carboxyl or ester group. The method involves a reaction of the compound of formula 
(II) or its salt wherein R1, R1' and R2 are specified above, and hydrogen in the presence of a catalyst on the basis of transition metal and chiral ligand. Transition metal is specified in group 8 or 9 of the periodic system, while chiral ligand is chiral phosphine.
EFFECT: invention refers to the use of the catalyst on the basis of transition ligand and chiral ligand in the method for preparing the compound of formula (I) used in synthesis of neutral endopeptidase (NEP) inhibitor or its prodrug.
36 cl, 1 dwg, 3 ex
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