Generally, transition metal-catalyzed stereodivergent transfer semihydrogenation of alkynes realized regulation of stereoselectivity by a Z to E isomerization process. Here, authors report a Ni-catalyzed stereodivergent transfer semihydrogenation of alkynes with a base-assisted metal species modulation mechanism, delivering both olefinic isomers smoothly in orthogonal catalytic pathways using cheap and nontoxic catalysts and additives
