| abstract |
PROBLEM TO BE SOLVED: To provide an optically active 1,2-bis (dialkylphosphino) benzene derivative useful as a ligand of a transition metal catalyst in an asymmetric hydrogenation reaction, a method for producing the same, and asymmetric hydrogenation A rhodium metal complex having the compound as a ligand, which is useful as an asymmetric catalyst for a reaction. SOLUTION: The following general formula (1): (In the formula, R 1 represents a linear or branched alkyl group having 2 to 6 carbon atoms, and an asterisk represents an asymmetric phosphorus atom.) An optically active 1,2-bis (dialkylphosphino) benzene derivative represented by the formula: |