FIELD: chemistry.
SUBSTANCE: invention refers to the way of production of optically active aminophosphinylbutanoic acids used in the weedkiller manufacturing process with the formula (2) 
where R1 is C1-4-alkyl, R2 is a hydrogen atom or C1-4-alkyl, R3 is C1-4-alkyl, C1-4-alkosy, aryl, aryloxy or benzyloxy, R4 is a hydrogen atom or C1-4-alkyl; * is represented by an enantioface carbon atom. The method consists in the following: the formula (1) compound 
where R1, R2, R3, R4 are determined above, is enantiofacely hydrogenized with the presence of ruthenocene and optically active phosphine.
EFFECT: efficient method that provides the production of the formula (2) compound with a high output.
4 cl, 12 ex, 2 tbl
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