Ruthenium-phosphine complex useful as catalyst and intermediate for synthesis thereof

摘要

A ruthenium-phosphine complex is represented by formula (I) :wherein R^2-BINAP represents a tertiary phosphine compound represented by formula (II) :where R² is a hydrogen atom or a methyl, methoxy or a t-butyl, X is a halogen atom ; and R and R¹ each represent is an optionally substituted phenyl group, e. g. substituted with alkyl, alkoxy or dialkylamino. A novel rutheniumphosphine complex used as starting material is represented by formula (III) :wherein R and R¹ are as above and dma represents N,N-dimethylacetamide and is reacted with BINAP in a solvent to make the complex (I).;The complex of formula (I) is useful as a catalyst for general organic syntheses with its ligand being an optically inactive compound or for asymmetric syntheses with its ligand being an optically active compound, and can be prepared at a low cost.