The present invention relates to {TAIL ~ an enantioselective hydrogenation catalyst} having a solubility in {HEAD ~ water} and more particularly to a complex of a transition metal such as ruthenium, rhodium, iridium, palladium, etc., and a water soluble phosphine compound 
The present invention relates to { TAIL ~ an enantioselective hydrogenation catalyst } having a solubility in { HEAD ~ water } and more particularly to a complex of a transition metal such as ruthenium , rhodium , iridium , palladium , etc . , and a water soluble phosphine compound
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