Abstract: The present invention relates to: a method for converting a hydroxyl group of an alcohol; and a catalyst which makes the method possible.

Abstract: The present invention relates to: a method for converting a hydroxyl group of an alcohol; and a catalyst which makes the method possible.

Abstract: The present invention provides a novel ruthenium complex which has an excellent catalytic activity in terms of reactivity for an asymmetric reduction of a carbonyl compound and enantioselectivity, a catalyst using the ruthenium complex, and a method for preparing optically active alcohol compounds using the ruthenium complex. The present invention relates to a ruthenium complex having a ruthenacycle structure, a catalyst for an asymmetric reduction consisting of the ruthenium complex, and a method for preparing optically active alcohol compounds using the ruthenium complex.

Abstract: Disclosed is a method for producing an optically active 2-arylpiperidinium salt, comprising asymmetrically hydrogenating a pyridinium salt in the presence of an iridium complex and hydrogen, the 2-arylpiperidinium salt being represented by the following general formula (1): wherein R1, R2, X, *, and m are as described in Description, the pyridinium salt being represented by the following general formula (2): wherein R1, R2, X, and m are as described in Description, and the iridium complex being represented by the following general formula (3): IrH(Z)(Q)(PP*)??(3), wherein Z, PP*, and Q are as described in Description, or the following general formula (4): [{IrH(PP*)}2(?-Z)3]Z??(4), wherein Z and PP* are as described in Description.

Abstract: An object of the present invention is to provide a method for reducing a halogenobenzoic acid ester, in which dehalogenation is inhibited, by using a readily available catalyst. The method comprises reducing an ester with hydrogen gas by using an aromatic hydrocarbon as a solvent in the presence of a ruthenium complex represented by the following general formula (1): RuXY(CO)(L)??(1) where X and Y represent monovalent anionic ligands, and L represents a tridentate aminodiphosphine ligand represented by the following general formula (2): where RZ1 represents an alkyl group having 1 to 4 carbon atoms, each RZ2 represents an alkyl group having 1 to 4 carbon atoms or a halogen atom, any adjacent two RZ2s may form a ring, Hal represents a halogen atom, and n represents 0 to 4.

Abstract: Disclosed is a method for producing an optically active 2-arylpiperidinium salt, comprising asymmetrically hydrogenating a pyridinium salt in the presence of an iridium complex and hydrogen, the 2-arylpiperidinium salt being represented by the following general formula (1): wherein R1, R2, X, *, and m are as described in Description, the pyridinium salt being represented by the following general formula (2): wherein R1, R2, X, and m are as described in Description, and the iridium complex being represented by the following general formula (3): IrH(Z)(Q)(PP*)??(3), wherein Z, PP*, and Q are as described in Description, or the following general formula (4): [{IrH(PP*)}2(?-Z)3]Z??(4), wherein Z and PP* are as described in Description.

Abstract: The present invention provides a novel ruthenium complex which has an excellent catalytic activity in terms of reactivity for an asymmetric reduction of a carbonyl compound and enantioselectivity, a catalyst using the ruthenium complex, and a method for preparing optically active alcohol compounds using the ruthenium complex. The present invention relates to a ruthenium complex having a ruthenacycle structure, a catalyst for an asymmetric reduction consisting of the ruthenium complex, and a method for preparing optically active alcohol compounds using the ruthenium complex.

Abstract: An object of the present invention is to provide a method for reducing a halogenobenzoic acid ester, in which dehalogenation is inhibited, by using a readily available catalyst. The method comprises reducing an ester with hydrogen gas by using an aromatic hydrocarbon as a solvent in the presence of a ruthenium complex represented by the following general formula (1): RuXY(CO)(L)??(1) where X and Y represent monovalent anionic ligands, and L represents a tridentate aminodiphosphine ligand represented by the following general formula (2): where RZ1 represents an alkyl group having 1 to 4 carbon atoms, each RZ2 represents an alkyl group having 1 to 4 carbon atoms or a halogen atom, any adjacent two RZ2s may form a ring, Hal represents a halogen atom, and n represents 0 to 4.