The process for producing an optically active carbonyl compound

The present invention is soluble in the reaction mixture, in the presence of an optically active transition metal catalysts having at least one carbon monoxide ligand, alpha, by asymmetric hydrogenation of β- unsaturated carbonyl compound, It relates to a process for producing an optically active carbonyl compound. The present invention is particularly, the corresponding optically active alpha, by asymmetric hydrogenation of β- unsaturated aldehyde or ketone, a method for producing an optically active aldehyde or ketone (especially citronellal). .BACKGROUND