| abstract |
Novel optically active bidentate phosphine ligand/palladium complexes represented by general formula (I) or (II) and used as a catalyst in the production of optically active β-hydroxy ketones serving as intermediates for producing medicines, wherein Y- represents a counter anion capable of forming a slat, and X represents a group represented by any of general formulae (a), (b), (c), (d), (e), (f), (g), (h) or (i), wherein R1 represents hydrogen, C¿1?-C6 alkyl, C1-C6 alkoxy, cyano, nitro, halo, phenyl, etc.; m represents 1 or 2, provided when m is 2, 2R?1¿ groups may be the same or different from each other; and A and B represent each independently phenyl or cyclohexyl, each of which may be substituted by R2 which has the same meaning as R1. |