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Method of preparation of 2,2'-bis(diarylphosphino)-6,6'- bis(trifluoromethyl)-1,1'-biphenyl, transition metal complex using it as ligand, and optically active 3-hydroxybutanoic acid ester derivative or . beta.-butyrolactone
Method of preparation of 2,2'-bis(diarylphosphino)-6,6'- bis(trifluoromethyl)-1,1'-biphenyl, transition metal complex using it as ligand, and optically active 3-hydroxybutanoic acid ester derivative or . beta.-butyrolactone
A novel phosphine compound usable as a catalyst in various asymmetric synthetic reactions is disclosed. The compound is a 2,2'- bis(diarylphosphino)-6,6'-bis(trifluoromethyl)-1,1'-biphenyl of (1): ##STR1## where R is a phenyl group or a phenyl group substituted by lower alkyl group, lower alkoxy group, halogen atom, or lower haloalkyl group.
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