Patent ID: 7619125

Claim:
A process for producing a cis-alkene compound comprising partially hydrogenating an internal alkyne compound, which is a reaction substrate, using a hydrogenation catalyst in a solvent in the presence of hydrogen, or a compound that provides hydrogen, thereby yielding the cis-alkene compound with high selectivity, wherein the hydrogenation catalyst comprises at least one of a base and a reducing agent; and a hydrogenation promoter produced by reacting a compound selected from the group consisting of an alkyne compound, an alkene compound, an alkynyl alcohol compound, and an alkenyl alcohol compound; at least one palladium compound selected from the group consisting of palladium compounds represented by general formulae (1) to (4) or at least one multimer thereof, Pd(II)X j L k (1) a salt of (Pd(II)X m ) 2− (2) a salt of (Pd(II)L n ) 2+ (3) a salt of (Pd(IV)X p ) 2− (4) wherein each L, independently, represents a monodentate ligand or a polydendate ligand other than a phosphorus-containing ligand, X represents an anionic group, j represents a value determined according to the valence of X so that X j has a valence of −2 as a whole, k represents an integer of from 0 to 4, m represents a value determined according to the valence of X so that X m has a valence of −4 as a whole, n represents an integer of from 4 to 6, and p represents a value determined according to the valence of X so that X p has a valence of −6 as a whole; and a base, in an organic solvent.